WO2006049189A1 - 有機単分子層の形成方法および機能素子の製造方法 - Google Patents
有機単分子層の形成方法および機能素子の製造方法 Download PDFInfo
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- WO2006049189A1 WO2006049189A1 PCT/JP2005/020153 JP2005020153W WO2006049189A1 WO 2006049189 A1 WO2006049189 A1 WO 2006049189A1 JP 2005020153 W JP2005020153 W JP 2005020153W WO 2006049189 A1 WO2006049189 A1 WO 2006049189A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2045—Light-sensitive devices comprising a semiconductor electrode comprising elements of the fourth group of the Periodic Table with or without impurities, e.g. doping materials
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/60—Formation of materials, e.g. in the shape of layers or pillars of insulating materials
- H10P14/68—Organic materials, e.g. photoresists
- H10P14/683—Organic materials, e.g. photoresists carbon-based polymeric organic materials, e.g. polyimides, poly cyclobutene or PVC
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/542—Dye sensitized solar cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a method for forming an organic monomolecular layer and a method for producing a functional element, and is suitable for application to, for example, the formation of an organic monomolecular layer on a hydrogen-terminated Si substrate.
- Hydrogen-terminated Si monolayers built on Si surfaces via Si-C bonds are excellent in orientation and stability, and are expected to be applied to the construction of new functional molecular devices.
- the organic monolayer formation methods reported to date include thermal reactions (eg, M. E. Quayum, T. Kondo, S. ihonyanagi, D. Miyamoto and K. Uosaki, Chem. Lett., 2 (2002)
- the problem to be solved by the present invention is that a method for forming an organic monomolecular layer and a functional element capable of easily forming an organic monomolecular layer on a semiconductor substrate typified by an Si substrate with high orientation It is to provide a manufacturing method. Disclosure of the invention
- the first invention is:
- An organic monomolecular layer is formed on the surface of the hydrogen-terminated p-type semiconductor substrate by using an electrode reaction in a solution containing a Grignard reagent using a terminated p-type semiconductor substrate as a working electrode. This is a method for forming an organic monomolecular layer.
- the first invention is a first invention.
- the surface of the hydrogen-terminated n-type semiconductor substrate is a hydrogen-terminated n-type semiconductor substrate made of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- the hydrogen-terminated n-type semiconductor substrate is allowed to undergo an electrode reaction in a solution containing a Grignard reagent while being irradiated with light having a photon energy equal to or higher than the energy gap of the hydrogen-terminated n-type semiconductor substrate.
- the third invention is a first invention.
- a hydrogen-terminated n-type semiconductor substrate composed of at least one element selected from the group consisting of Ge and C and having a diamond structure is used as a working electrode.
- the hydrogen termination is performed by causing an electrode reaction in a solution containing a Grignard reagent while selectively irradiating the surface with light having a photon energy higher than the energy gap of the n-type semiconductor substrate.
- An organic monomolecular layer formation method characterized in that an organic monomolecular layer having a predetermined pattern is formed on the surface of an n-type semiconductor substrate.
- the fourth invention is:
- the organic monomolecular layer is formed on the surface of the hydrogen-terminated p-type semiconductor substrate by using an electrode reaction in a solution containing a Grignard reagent using a terminated p-type semiconductor substrate as a working electrode. It is characterized by that.
- the fifth invention is:
- the surface of the hydrogen-terminated n-type semiconductor substrate is a hydrogen-terminated n-type semiconductor substrate made of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- the hydrogen-terminated n-type semiconductor substrate is subjected to an electrode reaction in a solution containing a Grignard reagent while being irradiated with light having a photon energy higher than the energy gap of the hydrogen-terminated n-type semiconductor substrate.
- Organic simple on the surface A molecular layer is formed.
- the sixth invention is:
- the surface of the hydrogen-terminated n-type semiconductor substrate is a hydrogen-terminated n-type semiconductor substrate made of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- the hydrogen termination is carried out by causing an electrode reaction in a solution containing a Grignard reagent while selectively irradiating light having a photon energy equal to or greater than the energy gap of the n-type semiconductor substrate. It is characterized in that an organic monomolecular layer having a predetermined pattern is formed on the surface of an n-type semiconductor substrate.
- the seventh invention is a.
- An organic monomolecular layer was formed on the surface of the hydrogen-terminated n-type semiconductor substrate by using an n-type semiconductor substrate terminated as a working electrode and performing an electrode reaction in a solution containing a diazo compound. This is a method for forming an organic monomolecular layer.
- the surface of the hydrogen-terminated P-type semiconductor substrate is a hydrogen-terminated p-type semiconductor substrate composed of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- the hydrogen-terminated p-type semiconductor substrate is subjected to an electrode reaction in a solution containing a diazo compound while being irradiated with light having a photon energy greater than the energy gap of the hydrogen-terminated P-type semiconductor substrate.
- Organic single molecule on the surface This is a method of forming an organic monomolecular layer characterized in that a layer is formed.
- the surface of the hydrogen-terminated p-type semiconductor substrate is made of a hydrogen-terminated p-type semiconductor substrate composed of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- the tenth invention is:
- the organic single molecule layer is formed on the surface of the hydrogen-terminated n-type semiconductor substrate by performing an electrode reaction in a solution containing a diazo compound using a terminated n-type semiconductor substrate as a working electrode. It is characterized by that.
- the first invention is a first invention.
- the surface of the hydrogen-terminated P-type semiconductor substrate is made of a hydrogen-terminated p-type semiconductor substrate made of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- the electrode reaction is carried out in a solution containing a diazo compound while irradiating light having a photon energy greater than the energy gap of the hydrogen-terminated p-type semiconductor substrate.
- an organic monomolecular layer is formed on the surface of the hydrogen-terminated P-type semiconductor substrate.
- the first I invention is a first I invention.
- the surface of the hydrogen-terminated p-type semiconductor substrate is made of a hydrogen-terminated p-type semiconductor substrate composed of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- a hydrogen-terminated p-type semiconductor substrate composed of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- the 13th invention is a first invention.
- a terminated p-type semiconductor substrate as the working electrode and conducting an electrode reaction in a solution containing an organic compound in which active species are generated by an oxidation reaction
- an organic single layer is formed on the surface of the hydrogen-terminated p-type semiconductor substrate. This is a method of forming an organic monomolecular layer characterized by forming a molecular layer.
- the 14th invention is a first invention.
- the surface of the hydrogen-terminated n-type semiconductor substrate is a hydrogen-terminated n-type semiconductor substrate made of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- An organic monomolecular layer is formed by forming an organic monomolecular layer on the surface of the hydrogen-terminated n-type semiconductor substrate by performing an electrode reaction in a solution containing a substance.
- the 15th invention is:
- the surface of the hydrogen-terminated n-type semiconductor substrate is a hydrogen-terminated n-type semiconductor substrate made of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- An electrode reaction is performed in a solution containing an organic compound in which active species are generated by an oxidation reaction while selectively irradiating light having photon energy higher than the energy gap of the hydrogen-terminated n-type semiconductor substrate.
- the organic monomolecular layer is formed by forming an organic monomolecular layer having a predetermined pattern on the surface of the hydrogen-terminated n-type semiconductor substrate.
- the 16th invention is:
- a diamond structure consisting of at least one element selected from the group consisting of G e and C, or S i and at least one element selected from the group consisting of G e and C
- the 17th invention is a first invention.
- the surface of the hydrogen-terminated n-type semiconductor substrate is a hydrogen-terminated n-type semiconductor substrate made of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- the hydrogen termination is carried out by causing an electrode reaction in a solution containing an organic compound in which an active species is generated by an oxidation reaction while irradiating light having a photon energy larger than the energy gap of the n-type semiconductor substrate.
- An organic monomolecular layer is formed on the surface of an n-type semiconductor substrate.
- the 18th invention is:
- a hydrogen-terminated n-type semiconductor substrate composed of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure is used as a working electrode.
- An electrode reaction is carried out in a solution containing an organic compound in which active species are generated by an oxidation reaction while selectively irradiating the surface of the substrate with light having a photon energy greater than the energy gap of the hydrogen-terminated n-type semiconductor substrate.
- an organic monomolecular layer having a predetermined pattern is formed on the surface of the hydrogen-terminated n-type semiconductor substrate.
- the 19th invention is:
- an n-type semiconductor substrate terminated as a working electrode and performing an electrode reaction in a solution containing an organic compound in which active species are generated by a reduction reaction an organic single layer is formed on the surface of the hydrogen-terminated n-type semiconductor substrate. This is a method of forming an organic monomolecular layer characterized by forming a molecular layer.
- the 20th invention is:
- a hydrogen-terminated p-type semiconductor substrate comprising at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure. Used as a working electrode, active species are generated by a reduction reaction while irradiating the surface of the hydrogen-terminated P-type semiconductor substrate with light having a photon energy higher than that of the hydrogen-terminated P-type semiconductor substrate.
- An organic monomolecular layer forming method characterized in that an organic monomolecular layer is formed on the surface of the hydrogen-terminated p-type semiconductor substrate by performing an electrode reaction in a solution containing an organic compound. is there.
- the second invention is a first invention.
- the surface of the hydrogen-terminated p-type semiconductor substrate is made of a hydrogen-terminated p-type semiconductor substrate composed of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- An electrode reaction is performed in a solution containing an organic compound in which active species are generated by a reduction reaction while selectively irradiating light having a photon energy higher than the energy gap of the hydrogen-terminated P-type semiconductor substrate.
- an organic monomolecular layer is formed by forming an organic monomolecular layer having a predetermined pattern on the surface of the hydrogen-terminated P-type semiconductor substrate.
- the second invention is
- a terminated n-type semiconductor substrate as a working electrode and performing an electrode reaction in a solution containing an organic compound in which active species are generated by a reduction reaction
- the above-mentioned organic compound is formed on the surface of the hydrogen-terminated n-type semiconductor substrate. It is characterized by forming a monomolecular layer.
- the second invention is a first invention.
- a hydrogen-terminated P-type semiconductor substrate composed of at least one element selected from the group consisting of Si, Ge, and C and having a diamond-type structure is used as the working electrode, and the surface of the hydrogen-terminated P-type semiconductor substrate.
- the electrode reaction is performed in a solution containing an organic compound in which active species are generated by a reduction reaction.
- An organic monomolecular layer is formed on the surface of the hydrogen-terminated P-type semiconductor substrate.
- the fourth invention is:
- the surface of the hydrogen-terminated P-type semiconductor substrate is made of a hydrogen-terminated p-type semiconductor substrate made of at least one element selected from the group consisting of Si, Ge and C and having a diamond-type structure as a working electrode.
- An electrode reaction is performed in a solution containing an organic compound in which active species are generated by a reduction reaction while selectively irradiating light having a photon energy larger than the energy gap of the hydrogen-terminated P-type semiconductor substrate.
- an organic monomolecular layer having a predetermined pattern is formed on the surface of the hydrogen-terminated P-type semiconductor substrate.
- At least one element selected from the group consisting of Ge and C, or at least one element selected from the group consisting of Si and Ge and C Specifically, the semiconductor substrate composed of G e substrate, C (diamond) substrate, S i C substrate, S i G e x substrate (however, 0 to X 1) and the like.
- a semiconductor substrate made of at least one element selected from the group consisting of Si, Ge and C is specifically an Si substrate, a Ge substrate, a C (diamond) substrate, and an SiC.
- the surface of the p-type or n-type semiconductor substrate is hydrogen-terminated (H—) in order to inactivate dangling bonds on the surface and prevent oxidation.
- the plane orientation of the semiconductor substrate is selected as necessary, but preferably a (1 1 1) plane orientation is used.
- the counter electrode and the reference electrode are selected optimally as necessary.
- Light having various photon energies of hydrogen-terminated p-type semiconductor substrate or hydrogen-terminated n-type semiconductor substrate can be light from various lamp light sources or laser light sources.
- This light irradiation generates electron-hole pairs in a hydrogen-terminated P-type semiconductor substrate or a hydrogen-terminated II-type semiconductor substrate.
- a mask made of a material that does not transmit this light may be used. You may scan the light.
- the mask By configuring the mask in the form of a diffraction grating and irradiating this mask with monochromatic light, it is possible to irradiate light into the shape of the diffraction pattern.
- an organic monomolecular layer is formed in the shape of this diffraction pattern. Can be formed.
- various pattern-shaped organic monolayers can be formed.
- the Grignard reagent is a general term for RM g X (R is a hydrocarbon group, X is a halogen) type organomagnesium compound, and when R is aliphatic, X is C i, Br In general, when R is aromatic, X is Br or I.
- various compounds are used as organic compounds that generate active species (radicals, etc.) by oxidation reaction or organic compounds that generate active species (radical force, etc.) by reduction reaction.
- the above Grignard reagents or diazo compounds are representative examples.
- Other examples of this organic compound include alkyl halide RX (R is an alkyl group, X is a halogen) or cyclopropenium.
- the functional element is to be interpreted in the broadest sense, and it is almost organic. Any molecular layer can be used, regardless of function or application. Specifically, various molecular electronics elements, solar cells, hydrogen generators, molecular recognition devices. In addition to DNA chips, for example, a micro contact stamping stamp (master) is also included. For example, by introducing a functional group (one NH 2 , -COOH, etc.) to the other end of the organic monolayer, functional structures (nanoparticles, metal complexes, biomolecules, etc.) can be fixed to the substrate surface with good controllability. can do.
- a functional group one NH 2 , -COOH, etc.
- a hydrogen-terminated p-type semiconductor substrate or a hydrogen-terminated n-type semiconductor substrate is used as a working electrode, and when a hydrogen-terminated n-type semiconductor substrate is used, a Grignard reagent is contained while further irradiating light.
- a Grignard reagent is contained while further irradiating light.
- a hydrogen-terminated n-type semiconductor substrate or a hydrogen-terminated P-type semiconductor substrate is used as a working electrode, and a hydrogen-terminated p-type semiconductor substrate is used, further irradiation with light is performed.
- an electrode reaction in a solution containing a compound an organic monolayer with one end covalently bonded to Si, Ge, or C can be easily formed with high orientation by electrochemical or photoelectrochemical methods. can do.
- oxidation is further performed while irradiating light.
- an organic monolayer with one end covalently bonded to Si, Ge or C is electrochemically or photoelectrochemically It can be formed easily and with high orientation.
- FIG. 1 is a schematic diagram showing a reaction mechanism in a method for forming an organic monomolecular layer according to the first embodiment of the present invention
- FIG. 2 is an illustration of the organic monomolecular layer according to the first embodiment of the present invention
- FIG. 3 is a schematic diagram showing an example of a mask used in the apparatus shown in FIG. 2
- FIG. 4 is an organic single molecule according to the second embodiment of the present invention.
- FIG. 5 is an SEM of the sample obtained in Example 3 of the method for forming an organic monomolecular layer according to the third embodiment of the present invention.
- FIG. 6 is a photograph showing an SEM image of the sample obtained in Example 4 of the method for forming an organic monolayer according to the third embodiment of the present invention, and FIG.
- Example 5 of the method of forming an organic monolayer according to the third embodiment of the invention A photograph showing an SEM image of a sample
- FIG. 8 is a schematic diagram showing a current-potential curve in Example 6 of the method for forming an organic monolayer according to the fourth embodiment of the present invention
- FIG. FIG. 10 shows a SEM image of the sample obtained in Example 6 of the method for forming an organic monolayer according to the fourth embodiment of the invention
- FIG. 10 and FIG. 11 show the fourth embodiment of the present invention.
- Fig. 12 shows how to form an organic monomolecular layer according to the fifth embodiment of the present invention.
- FIG. 13 is a schematic diagram showing a method for manufacturing a master for a micro contact printing stamp according to a sixth embodiment of the present invention.
- a p-type H-semiconductor substrate is used as the working electrode.
- the p-type H-semiconductor substrate is composed of at least one element selected from the group consisting of Ge and C, or at least one element selected from the group consisting of Si, Ge and C, Has a diamond-type structure.
- a solution containing a Grignard reagent is used as the electrolytic solution.
- a p-type H-semiconductor substrate is brought into contact with the electrolytic solution as a working electrode, and a predetermined counter electrode and a reference electrode are immersed in the electrolytic solution, and the p-type H-semiconductor substrate is predetermined with respect to the reference electrode.
- the electrode reaction is performed.
- the terminal C of R contained in the Grignard reagent to be used is covalently bonded to Ge, C, etc. on the surface of the p-type H-semiconductor substrate.
- an organic monomolecular layer is formed with high orientation according to the atomic arrangement on the surface of the p-type H-semiconductor substrate.
- Figure 1 shows the reaction mechanism when an organic monolayer is formed on the surface of a p-type H-semiconductor substrate.
- the semiconductor substrate is a Ge substrate.
- the reaction mechanism is as follows. (1) As an initial stage, Grignard reagent is positively oxidized to generate radicals (R ⁇ ). (2) R ⁇ pulls out the terminal hydrogen on the surface of the Ge substrate, generating Ge radicals. (3) Ge radical reacts with R ', and R is fixed to the surface of the Ge substrate via the Ge-C bond. This is the same as when the semiconductor substrate is a Si substrate (see Reference 2).
- FIG. 2 schematically shows an example of an apparatus used for the above reaction.
- a cylinder 2 is attached to the side surface of the reaction tank 1.
- An opening 3 is provided on the bottom surface of the cylinder 2 and communicates with the inside of the reaction tank 1 through the opening 3.
- Inside reaction tank 1. Contains solution 4 containing a Grignard reagent or diazo compound.
- a solution 4 containing a Grignard reagent is used.
- a substrate 5 is attached in a state of being sealed by a 0-ring 6, and its surface is in contact with the solution 4.
- the substrate 5 is a p-type H-semiconductor substrate.
- an ohmic contact 7 is formed, and the ohmic contact 7 is connected to the working electrode 8.
- a counter electrode 9 and a reference electrode 10 are immersed in the solution 4.
- a transparent window 11 is attached to the side of the reaction vessel 1 facing the substrate 5.
- the surface of the substrate 5 can be irradiated with the light 13 from the light source 12 provided outside the reaction vessel 1 through the transparent window 11.
- the light source 1 2 a lamp light source or a laser light source is used.
- the transparent window 1 1 is provided with a mask 14 as required.
- Figure 3 shows an example of the mask 14.
- Example 1 a p-type H—G e (1 1 1) single crystal substrate (B dope, resistivity 1 — 1 0 ⁇ ⁇ cm, ohmic contact (In) — Z n)), Ag wire for reference electrode 10 and Pt plate for counter electrode 9.
- a C 18 H 37 Mg C 1 / THF (tetrahydrofuran) solution was used as the solution 4.
- octadecyl (C 18 H 37 ) monolayer was bonded to the G e (1 1 1) surface via G e—C bond.
- the electrochemical reaction was performed in a glove box under a high purity Ar atmosphere.
- an organic monomolecular layer such as an octadecyl monomolecular layer can be easily and highly oriented on a p-type semiconductor substrate such as a p-type Ge substrate.
- an n-type H-semiconductor substrate is used as the working electrode.
- This n-type H semiconductor substrate is made of at least one element selected from the group consisting of Si, Ge and C, and has a diamond structure.
- a solution containing a Grignard reagent is used as the electrolytic solution. Then, an n-type H—semiconductor substrate is contacted with this electrolytic solution as a working electrode, and a predetermined counter electrode and a reference electrode are immersed in the electrolytic solution.
- the n-type H-semiconductor substrate By irradiating the n-type H-semiconductor substrate with light having a photon energy equal to or greater than the energy gap, the n-type H-semiconductor substrate is set to a predetermined potential with respect to the reference electrode to cause an electrode reaction.
- the terminal C of R contained in the Grignard reagent to be used is covalently bonded to Si, Ge or C on the surface of the n-type H-semiconductor substrate.
- an organic monolayer is formed with high orientation according to the atomic arrangement on the surface of the n-type H-semiconductor substrate.
- Example 2 an n-type H_S i (1 1 1) single crystal substrate (P-doped, resistivity 1—10 ⁇ ⁇ cm, ohmic contact (I n—Ga)) is applied to the working electrode substrate 5.
- An Ag wire was used for the reference electrode 10 and a Pt plate was used for the counter electrode 9.
- As the solution 4 a C I8 H 37 Mg C 1 / THF solution was used.
- a xenon lamp (20.0 mW) with a wavelength of 400 nm or less was used as the light source for irradiating the n-type H-Si (1 1 1) single crystal substrate.
- photoelectrochemical reaction the octadecyl monolayer was bonded to the S i (1 1 1) surface via the Si 1 C bond.
- the photoelectrochemical reaction was performed in a glove box under a high purity Ar atmosphere.
- Fig. 4 is a current-potential curve obtained when a 0.5M C 18 H 37 Mg C 1 / THF solution was used.
- an organic monomolecular layer such as an octadecyl monomolecular layer can be easily and highly oriented on an n-type semiconductor substrate such as an n-type Si substrate.
- an n-type H-semiconductor substrate is used as the working electrode.
- This n-type H-semiconductor substrate is made of at least one element selected from the group consisting of Si, Ge, and C, and has a diamond structure.
- a solution containing a Grignard reagent is used as the electrolytic solution. Then, an n-type H—semiconductor substrate is brought into contact with the electrolyte as a working electrode, and a predetermined counter electrode and a reference electrode are immersed in the electrolyte, and the energy gap of the n-type H—semiconductor substrate.
- the n-type H-semiconductor substrate is set to a predetermined potential with respect to the reference electrode. Let the electrode reaction occur. As a result, C at the end of R contained in the Grignard reagent to be covalently bonded to Si, Ge or C on the surface of the n-type H-semiconductor substrate in the irradiated region. At this time, an organic monomolecular layer is selectively formed with high orientation according to the atomic arrangement on the surface of the n-type H-semiconductor substrate.
- Example 3 an n-type H—S i (1 1 1) single crystal substrate (P doping, resistivity 1 1 1 ⁇ ⁇ cm. — Ga a)), Ag wire was used for reference electrode 10 and Pt plate was used for counter electrode 9, and 0.5M C 18 H 37 Mg C 1 / THF solution was used for solution 4.
- Mask 14 is a transmission grid (TEM) observation grid with periodic holes and bars on the micrometer scale (5
- a 0 mesh (pitch: 500 mm, hole size: 45 mm, bar size: 50 m) was placed on the front surface of the n-type H—S i (1 1 1) single crystal substrate.
- the octadecyl monolayer is converted to S via a Si 1 C bond.
- FIG. 5 shows a scanning electron microscope (SEM) image of the surface of the n-type H—S i (1 1 1) single crystal substrate that has undergone the photoelectrochemical reaction as described above.
- the n-type H—S i (1 1 1) single crystal substrate was set to a potential of +2.0 V with respect to the reference electrode 10 and held for 30 seconds. From Fig.
- Example 4 the substrate 5 serving as the working electrode is applied to an n-type H—S i (1 1 1) single crystal substrate (P-doped, resistivity 1—10 ⁇ ⁇ cm, ohmic contact (I n—Ga) )), Ag wire was used for the reference electrode 10 and Pt plate was used for the counter electrode 9.
- a 0.5M C 18 H 37 Mg C 1 / THF solution was used as the solution 4 .
- An Nd: YAG laser (10 Hz, 53 2 nm, 300 mW) was used as the light source for irradiating the n-type H—Si (1 1 1) single crystal substrate.
- Mask 14 is a periodic hole on the micrometer scale.
- FIG. 6 shows an SEM image of the surface of the n-type H—S i (1 1 1) single crystal substrate that has been subjected to the photoelectrochemical reaction as described above.
- the n-type H—S i (1 1 1) single crystal substrate was set to a potential of +2.0 V with respect to the reference electrode 10 and held for 30 seconds.
- Figure 6 shows that the octadecyl monolayer on the n-type H—S i (1 1 1) single crystal substrate that was not irradiated by mask 14 (the area corresponding to the mesh bar) is It can be seen that the octadecyl monolayer was formed only in the region that was not formed and was irradiated with light (the region corresponding to the holes in the mesh).
- Example 5 an n-type H—S i (1 1 1) single crystal substrate (P-doped, resistivity 1—10 ⁇ ⁇ cm, ohmic contact (I n— G) a)), Ag wire for reference electrode 10 and Pt plate for counter electrode 9 were used.
- As the solution 4 a 0.5 MC 18 H 37 Mg C 1 ZTHF solution was used.
- As the light source for irradiating the n-type H—S i (1 1 1) single crystal substrate an Nd: YAG laser (1 0 Hz, 5 3 2 nm, 3 0 mW) was used. .
- a single-hole TEM observation Cu grid having a diameter of 1.0 mm was placed on the front surface of an n-type H—S i (1 1 1) single crystal substrate.
- N-type H—S i (1 1 1) single crystal substrate was irradiated by photoelectrochemical reaction
- the octadecyl monolayer was bound to the S i (1 1 1) surface via S i—C bonds.
- the photoelectrochemical reaction was performed in a glove box under a high purity Ar atmosphere.
- FIG. 7 shows a SEM image of the surface of the n-type H—S i (1 1 1) single crystal substrate that has been subjected to the photoelectrochemical reaction as described above. However, the working electrode was set to a potential of +2.0 V with respect to the reference electrode and held for 300 seconds. Next explained is a method for forming an organic monomolecular layer according to the fourth embodiment of the invention.
- an n-type H-semiconductor substrate is used as the working electrode.
- This n-type H-semiconductor substrate is made of at least one element selected from the group consisting of Si, Ge and C, and has a diamond-type structure.
- a solution containing a Grignard reagent is used as the electrolytic solution. Then, an n-type H—semiconductor substrate is brought into contact with this electrolytic solution as a working electrode, and a predetermined counter electrode and a reference electrode are immersed in this electrolytic solution.
- an electrode reaction is performed by changing the potential of the n-type H-semiconductor substrate with respect to the reference electrode.
- C at the end of R contained in the Grignard reagent used is covalently bonded to Si, Ge or C on the surface of the n-type H-semiconductor substrate in the irradiated region.
- an organic monomolecular layer is selectively formed with high orientation according to the atomic arrangement on the surface of the n-type H-semiconductor substrate.
- Mg is deposited on the surface of the n-type H-semiconductor substrate in the area that was not irradiated with light.
- Example 6 n-type H—S i (1 1 1) A crystal substrate (P dopant, resistivity 110 ⁇ ⁇ cm, ohmic contact (In_Ga)), Ag wire for the reference electrode 10, and Pt plate for the counter electrode 9 were used.
- As the solution 4 a 0.5 MC 18 H 37 Mg C 1 / THF solution was used.
- Mask 14 is a TEM observation Cu grid (50 mesh (pitch 5) with periodic holes and bars on the micrometer scale.
- Fig. 8 shows the current-potential curve at this time.
- FIG. 9 shows a SEM image of the surface of an n-type H—S i (1 1 1) single crystal substrate that has undergone a photoelectrochemical reaction by the potential operation shown in FIG. Figure 9 shows that octadecyl monolayers and Mg layers are alternately formed on the n-type H-Si (1 1 1) single crystal substrate reflecting the periodic structure of the mask 14 Recognize.
- Fig. 10 shows a high-resolution SEM image of the Mg layer part of Fig. 9.
- Fig. 11 shows a high-resolution SEM image of the octadecyl monolayer shown in Fig. 9.
- an organic monolayer such as an octadecyl monolayer can be easily and highly oriented on an n-type semiconductor substrate such as an n-type Si substrate and selectively formed into a desired pattern.
- Mg layer can be formed in the region between these organic monolayers.
- an n-type H-semiconductor substrate is used as a working electrode.
- This n-type H-semiconductor substrate is composed of at least one element selected from the group consisting of Ge and C, or at least one element selected from the group consisting of Si, Ge and C, and diamond.
- a solution containing a diazo compound is used as the electrolytic solution.
- an n-type H-semiconductor substrate is brought into contact with the electrolytic solution as a working electrode, and a predetermined counter electrode and a reference electrode are immersed in the electrolytic solution, and the n-type H-semiconductor substrate is set at a predetermined potential with respect to the reference electrode.
- the electrode reaction is performed.
- the terminal C of R contained in the diazo compound to be covalently bonded to Ge, C, etc. on the surface of the n-type H-semiconductor substrate.
- an organic monolayer is formed with high orientation according to the atomic arrangement on the surface of the n-type H-semiconductor substrate.
- Figure 12 shows the reaction mechanism when an organic monolayer is formed on the surface of an n-type H-semiconductor substrate.
- the semiconductor substrate is a Ge substrate.
- the reaction mechanism is as follows. (1) A diazo compound forms a radical (R ') by a one-electron reduction reaction. (2) R ⁇ pulls out the terminal hydrogen on the surface of the Ge substrate, generating Ge radicals. (3) The Ge radical reacts with R-, and R is fixed to the surface of the Ge substrate through the Ge-C bond.
- Example 7 an n-type H_G e (1 1 1) single crystal substrate (P-doped, resistivity 110 ⁇ ⁇ cm, ohmic contact (I n—Ga)) is applied to the working electrode substrate 5. ), Ag wire for the reference electrode 10 and Pt plate for the counter electrode 9. Solution 4 contains 0.05 MH 2 SO 4 and 1 mM
- an organic monomolecular layer such as a diazobenzene monomolecular layer can be formed easily and with high orientation on an n-type semiconductor substrate such as an n-type Ge substrate.
- a sixth embodiment of the present invention will be described.
- a stamp used in a micro contact printing method for example, A. Kumar, GM Whites et al., Langmuir, 10 (1994) 1498.
- the manufacturing method of the master will be explained.
- a p-type H-semiconductor substrate is used as a master substrate for a microcontact printing stamp.
- This P-type H—semiconductor substrate is composed of at least one element selected from the group consisting of Ge and C, or at least one element selected from the group consisting of Si, Ge and C. It has a diamond type structure.
- a hydrophilic organic monomolecular layer is formed only in a predetermined region of the surface of the p-type H-semiconductor substrate, or an organic monomolecular layer having a hydrophilic group is formed. Are formed with the hydrophilic group facing outward.
- a hydrophobic organic monomolecular layer is formed in the same manner as in the first embodiment only in the region where the hydrophilic organic monomolecular layer or the organic monomolecular layer having a hydrophilic group is not formed.
- an organic monomolecular layer having a hydrophobic group is formed with the hydrophobic group facing outward.
- a hydrophilic photocurable polymer is formed only on the surface of the surface of the p-type semiconductor substrate where a hydrophilic organic monomolecular layer or an organic monomolecular layer having a hydrophilic group is formed.
- the photocurable polymer is cured by irradiating light onto the surface of the p-type semiconductor substrate on which the photocurable polymer is formed.
- a master stamp for micro printing is manufactured.
- the stamp is produced by copying the pattern of the micro contact printing master manufactured as described above onto a stamp material such as polydimethylsiloxane (PDMS).
- a stamp material such as polydimethylsiloxane (PDMS).
- a solution of molecules for example, thiol, aminosilane, etc.
- a self-assembled film is formed on the substrate according to the pattern of the master.
- a substrate surface stamped with aminosilane has a positive charge, and therefore attracts a negatively charged DNA. Therefore, when a DNA solution is applied to the substrate surface, DNA is adsorbed only on the aminosilane film, and a DNA pattern is formed.
- Example 8 the substrate .5, which is the working electrode, is applied to the p-type H—G e (1 1 1) single crystal substrate (B-dope, resistivity 1—10 ⁇ ⁇ cm, ohmic contact (I n — Z n)), Ag wire for reference electrode 10 and Pt plate for counter electrode 9.
- a microcontact printing stamp master was manufactured according to the procedure shown in FIG.
- a solution of benzene diazonium salt having a hydrophilic group X (OH, NH 2 , N0 2 etc.) is used as the solution 4.
- the p-type H—Ge (1 1 1) single crystal substrate is immersed in this solution 4, and the potential of the p-type H—Ge (lll) single crystal substrate is made negative, so that this p-type H—Ge (1 1 1)
- This p-type H_Ge (1 1 1) single crystal substrate is selectively irradiated with light having a photon energy higher than that of the single crystal substrate using a mask.
- the benzene derivative monolayer was bonded in a predetermined pattern with the hydrophilic group X facing outward.
- the electrochemical reaction was carried out in a glove box under a high purity Ar atmosphere.
- the Grignard reagent shown in Fig. 13 was used as Solution 4, and the p-type H-Ge (11 1) single crystal substrate on which the benzene derivative monolayer was formed was squeezed into Solution 4.
- This p-type H—Ge (1 1 1) single crystal substrate undergoes an electrochemical reaction with a positive potential.
- a hydrophobic benzene monolayer was bonded to the surface of Ge (111) surface not covered with a benzene derivative monolayer having a hydrophilic group X via a Ge-C bond.
- the electrochemical reaction was performed in a glove box under a high purity Ar atmosphere.
- hydrophilic photocurable polymer is formed on the P-type Ge (1 1 1) single crystal substrate on which the organic monomolecular layer is formed as described above, and then cured by irradiation with light. To form a polymer pattern.
- hydrophilic photocurable polymers include polyethylene glycol dimethacrylate. Use relays.
- a master for a micro contact printing stamp can be easily manufactured using a p-type semiconductor substrate such as a p-type Ge substrate.
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- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrodes Of Semiconductors (AREA)
- Liquid Deposition Of Substances Of Which Semiconductor Devices Are Composed (AREA)
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Abstract
Description
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| Application Number | Priority Date | Filing Date | Title |
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| JP2004-319487 | 2004-11-02 | ||
| JP2004319487 | 2004-11-02 |
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| WO2006049189A1 true WO2006049189A1 (ja) | 2006-05-11 |
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| PCT/JP2005/020153 Ceased WO2006049189A1 (ja) | 2004-11-02 | 2005-10-27 | 有機単分子層の形成方法および機能素子の製造方法 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6284317B1 (en) * | 1998-04-17 | 2001-09-04 | Massachusetts Institute Of Technology | Derivatization of silicon surfaces |
| US20020197389A1 (en) * | 1999-11-19 | 2002-12-26 | Buriak Jillian M. | Functionalized silicon surfaces |
| US20030021967A1 (en) * | 2000-02-20 | 2003-01-30 | Jacob Sagiv | Constructive nanolithography |
| JP2003309061A (ja) * | 2002-04-18 | 2003-10-31 | Japan Science & Technology Corp | シリコンウェハー上の有機単分子膜の光パターニング |
| JP2005079410A (ja) * | 2003-09-01 | 2005-03-24 | Japan Science & Technology Agency | 分子デバイスとその製造方法 |
| JP2005161266A (ja) * | 2003-12-04 | 2005-06-23 | Japan Science & Technology Agency | 界面電子移動触媒分子層構成体とその形成方法並びに光エネルギー変換方法 |
-
2005
- 2005-10-27 WO PCT/JP2005/020153 patent/WO2006049189A1/ja not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6284317B1 (en) * | 1998-04-17 | 2001-09-04 | Massachusetts Institute Of Technology | Derivatization of silicon surfaces |
| US20020197389A1 (en) * | 1999-11-19 | 2002-12-26 | Buriak Jillian M. | Functionalized silicon surfaces |
| US20030021967A1 (en) * | 2000-02-20 | 2003-01-30 | Jacob Sagiv | Constructive nanolithography |
| JP2003309061A (ja) * | 2002-04-18 | 2003-10-31 | Japan Science & Technology Corp | シリコンウェハー上の有機単分子膜の光パターニング |
| JP2005079410A (ja) * | 2003-09-01 | 2005-03-24 | Japan Science & Technology Agency | 分子デバイスとその製造方法 |
| JP2005161266A (ja) * | 2003-12-04 | 2005-06-23 | Japan Science & Technology Agency | 界面電子移動触媒分子層構成体とその形成方法並びに光エネルギー変換方法 |
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| BOUKHERROUB R. ET AL.: "New Synthetic Routes to Alkyl Monolayers on the Si(111) Surface", LANGMUIR, THE AMERICAN CHEMICAL SOCIETY, vol. 15, no. 11, 25 May 1999 (1999-05-25), pages 3831 - 3835, XP000925257 * |
| MASUDA T. AND UOSAKI K.: "Construction of Organic Monolayers with Electron Transfer Function on a Hydrogen Terminated Si(111) Surface via Silicon-Carbon Bond and Their Electrochemical Characteristics in Dark and Under Illumination", CHEMISTRY LETTERS, CSJ: THE CHEMICAL SOCIETY OF JAPAN, vol. 33, no. 7, 5 July 2004 (2004-07-05), pages 788 - 789, XP002998028 * |
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| YAMADA T. ET AL.: "Evaluation of Organic Monolayers Formed on Si(111): Exploring the Possibilities for Application in Electron Beam Nanoscale Patterning", JAPANESE JOURNAL OF APPLIED PHYSICS. PART 1, THE INSTITUTE OF PURE AND APPLIED PHYSICS, vol. 40, no. 8, 15 August 2001 (2001-08-15), pages 4845 - 4853, XP001110886 * |
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