WO2008047514A1 - Structure de séparation des microphases, structure immobilisée de séparation des microphases et oscillateur laser à longueur d'ondes variable, sonde thermique et filtre à lumière utilisant cette structure - Google Patents
Structure de séparation des microphases, structure immobilisée de séparation des microphases et oscillateur laser à longueur d'ondes variable, sonde thermique et filtre à lumière utilisant cette structure Download PDFInfo
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- WO2008047514A1 WO2008047514A1 PCT/JP2007/066939 JP2007066939W WO2008047514A1 WO 2008047514 A1 WO2008047514 A1 WO 2008047514A1 JP 2007066939 W JP2007066939 W JP 2007066939W WO 2008047514 A1 WO2008047514 A1 WO 2008047514A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
Definitions
- Microphase separation structure immobilized microphase separation structure, and tunable laser oscillator, temperature sensor, and optical filter provided with the structure
- the present invention relates to a polymer block copolymer formed by utilizing the self-organization ability of a block copolymer without using a microfabrication technique and capable of controlling the temperature dependence of the structural period.
- a block copolymer is a chain in which a repeating chain of monomer A and a repeating chain of monomer B are linked in a chain, and A or B This chain is called a block chain!
- a binary block copolymer composed of a single block chain A and block chain B is represented as A—B—B.
- slight branching in each block chain is not eliminated.
- a block copolymer forms an ordered microdomain structure when different types of block chains undergo phase separation without sufficiently mixing with each other. This aggregate is called a microphase separation structure.
- the microdomain exhibits various forms depending on the composition of the block copolymer.
- a lamellar structure in which two block chains are alternately arranged in layers, or in a matrix consisting of one block chain the other block chain exists in a cylindrical shape or a spherical shape in which the other block chain exists in a cylindrical shape It is classified into a globoid structure having a spherical shape or a mesh structure.
- microdomains cannot be enlarged beyond the spread of the constituent block chains.
- a microphase separation structure of irregular orientation in which a plurality of microstructures (hereinafter referred to as grains) regularly oriented only in a narrow region of sub-micron size. Since the structure is an isotropic structure with random orientation directions as a whole, it is a functional material based on the properties of regularly oriented micro phase separation structures There is a problem that it is difficult to effectively use the system.
- Non-Patent Document 2 a structure showing a uniform orientation in the in-plane direction is formed only by placing a pre-patterned surface under the block copolymer. It will be shown!
- Patent Document 1 discloses that a lamellar structure is formed by placing a block copolymer on a substrate having a predetermined surface roughness and performing a heat treatment.
- Non-Patent Documents 3 and 4 also show the formation of a lamellar structure by orientation control using epitaxy growth.
- Non-Patent Documents 6 and 7 show a method for forming a thin film by evaporating a solvent. However, only a disordered microphase-separated structure has been obtained due to the strain that occurs during evaporation to dryness in the film-forming process.
- Patent Document 3 An example in which a colloidal crystal is used as a photonic crystal serving as a laser resonator is also described in Patent Document 3 in the same manner as described above.
- a photonic crystal made of colloidal crystals is used only as an output reflector, and has a structure having a separate light emitting layer. Therefore, unlike the structure in which the light emitting layer in which the laser medium is introduced into the resonator and the laser resonator structure are integrated as in the present invention, it is necessary to adjust the optical parallelism between the light emitting layer and the output reflector. is there.
- Patent Document 2 the temperature dependence of the resonator characteristics is not discussed, and it is described that it has a high thermal stability and is characterized by this.
- Patent Document 1 JP 2004-99667 A
- Patent Document 2 Japanese Patent No. 3507659
- Patent Document 3 Japanese Unexamined Patent Publication No. 2006-287024
- Non-Patent Document 1 Norio Ise et al. “Introduction to New Polymer Chemistry” Chemistry, 1995
- Non-patent document 2 Rockford et al. Physical Review Letters 82, 2602 (1999)
- Non-patent document 3 Sang Ouk Kim et al. Nature, Vol. 424, P41;!-414 (2003)
- Non-patent document 4 Richard A. Register et al. Nature, Vol. 424, P378 ⁇ 379 (200
- Non-Patent Document 5 Mitsuhiro Shibayama et al. Macromolecules, 16, P16-28 (1 983)
- Non-Patent Document 6 Michael R. Bockstaller et al. J. Phys. Chem. B, vol. 107, No. 37, P10017 ⁇ 10024 (2003)
- Non-Patent Document 7 Tao Deng et al., Polymer, No. 44, P6549-6553 (2003) Disclosure of the Invention
- the microphase separation structure of the present invention is a microphase separation structure grain showing a structural color containing a specific solvent, and the temperature dependence of the phase separation structure period can be controlled by changing the temperature.
- materials such as tunable laser resonators and sensors, optical filters, and optical switches.
- photonic crystals that can be used for electronic devices and optical devices, particularly tunable photonic crystal materials.
- a micro phase-separated structure is obtained by utilizing self-assembly of a block copolymer having a large molecular weight without using nano-precision fine processing technology such as photolithography and complicated processing steps.
- a single crystal-like giant grain with a visible size that is, a microphase-separated structure aggregate, is formed, and the solution temperature is changed in a specific region to change the microscopic property of the solvent.
- the biasing force which is the driving force for phase separation, increases or decreases and the structural period (repetition period) of the microphase separation structure changes.
- microphase separation structure immobilized by a method of immobilizing the obtained microphase separation structure using a photopolymerization method without disturbing the structural order is disclosed.
- an optical device utilizing the temperature characteristics of the microphase separation structure is disclosed.
- the present inventors can easily obtain a single crystal-like giant dahrain in a self-organized manner, and further change the temperature. Thus, it was found that the structural period of the microphase separation structure can be controlled.
- the first of the present invention is a block copolymer containing at least a block chain A consisting of repeating monomer A and a block chain B consisting of repeating monomer B, and a microphase separation structure containing a solvent,
- the temperature at which the solvent dissolves block chain A and block chain B The temperature region 1 and the temperature region 2 that does not dissolve the block chain A but dissolves the block chain B, and the structural period is changed by changing the temperature between the temperature region 1 and the temperature region 2.
- a microphase-separated structure characterized by the above is provided.
- the concentration and temperature of the block copolymer in the solution are in a range in which a structural color is expressed.
- the microphase-separated structure is a grain having a visible size, and it is most preferable that the temperature at the boundary between the temperature region 1 and the temperature region 2 is near the ⁇ temperature.
- the ⁇ temperature is defined as the temperature at which the second virial coefficient becomes 0, as described in Non-Patent Document 1, pl08-; 109.
- the second aspect of the present invention is an immobilized microphase separation formed by further adding a photopolymerization initiator to the microlayer separation structure according to the first aspect of the present invention and irradiating with actinic rays. It provides a structure.
- an immobilized microphase separation structure in which the microphase separation structure before irradiation with actinic rays is a grain of a visible size is preferred, and block block A and block of the block copolymer are preferred.
- a third aspect of the present invention is the microphase-separated structure, the heating / cooling element, and the excitation source according to the first aspect of the present invention, which contains, as a laser medium, a light emitting body such as a fluorescent dye compound and luminescent fine particles.
- An excitation light source that can control the temperature of the heating / cooling element with an external power source or a signal source in terms of time or space, and the excitation source optically excites the illuminant to emit light.
- the present invention provides a wavelength tunable laser oscillator characterized by being a drive power source that electronically excites a light emitter to achieve light emission.
- the microphase separation structure according to the first aspect of the present invention containing a laser dye, a calo heat cooling element, and an excitation source are used, and the temperature of the heating and cooling element is temporally controlled by an external power source or a signal source. Or it can be arbitrarily controlled spatially, and the excitation source optically excites the laser dye to cause oscillation, or the laser dye electronically.
- a tunable laser oscillator characterized by being a drive power source that is excited to cause oscillation is preferable.
- a fourth aspect of the present invention includes a laser resonator, an excitation source, and a spectroscopic measurement device using the microphase separation structure according to the first aspect of the present invention containing a laser medium.
- An excitation light source that optically excites the medium to oscillate, or a drive power supply that electronically excites the laser medium to oscillate, and requires a single laser beam generated by the spectroscopic measurement device Providing a temperature sensor capable of measuring the temperature around the microphase-separated structure according to the first aspect of the present invention, characterized in that the light is optically guided and analyzed by analyzing the wavelength. To do.
- a fifth aspect of the present invention comprises a transparent cell equipped with a heating / cooling element and containing the microphase separation structure according to the first aspect of the present invention, a monochromatic light source, a spectroscopic detector, and an analysis device.
- the temperature of the cooling element can be arbitrarily controlled temporally or spatially from an external power supply or signal source, the light source consists of two or more types of monochromatic light, and the spectral detector transmits the wavelength of the light transmitted through the cell.
- the optical filter can be separately measured, and the analysis device outputs a signal from the spectroscopic detector as an external signal.
- the microphase separation structure of the present invention is a microphase separation structure grain showing a structural color, and the temperature dependence of the phase separation structure period can be controlled by changing the temperature.
- the microphase-separated structure in which the structural period changes significantly, that is, the photonic band gap changes significantly with temperature. It can be used as a material. For example, it is useful for materials such as resonators, sensors, optical filters, and optical switches for tunable lasers.
- microphase separation structure of two preferred embodiments having different characteristics with respect to the microphase separation structure is provided.
- Embodiment 1 is a block copolymer containing at least a block chain A consisting of repeating monomer A and a block chain B consisting of repeating monomer B, and a microphase separation structure containing a solvent, wherein the solvent is a block A temperature region 1 in which the chain A and the block chain B are dissolved, and a temperature region 2 in which the block chain A is not dissolved and the block chain B is dissolved, and the temperature is changed between the temperature region 1 and the temperature region 2. It is a microphase-separated structure characterized by changing its structural period by changing it.
- Non-Patent Document 5 a solvent having a temperature region 1 that dissolves a polymer and a temperature region 2 that does not dissolve is called a selective solvent as shown in Non-Patent Document 5.
- the polymer concentration in the solution and the temperature of the solution are within the range in which the structural color is expressed in terms of easy application to photonic crystal materials that can be used in electronic devices and optical devices. Yes.
- Embodiment 2 is a block copolymer containing at least block chain A and block chain B, and a microphase-separated structure containing a solvent, and the solvent is a block chain of both block chain A and block chain B.
- it is a mixed solvent of a solvent that is a good solvent and a solvent that is a poor solvent for at least one block chain.
- a good solvent refers to a solvent that is soluble in the polymer chain
- a poor solvent refers to a solvent that is soluble in the polymer chain.
- This microphase-separated structure is used for electronic devices and optical devices because the polymer concentration in the solution, the poor solvent concentration in the mixed solvent, and the temperature of the solution are within the range where the structural color appears. It is preferable in that it can be applied to possible photonic crystal materials and the micro phase separation structure becomes distorted during immobilization.
- the microphase-separated structure used in the control method of the present invention includes the types and combinations of polymer chains constituting the block copolymer, the volume fraction thereof, and the solvent in which the block copolymer is dissolved. It depends on the type. Depending on the structure to be created, for example polystyrene, poly-p-chlorostyrene, polymethyl methacrylate, polyacrylic acid, polyisoprene, polybutadiene It is used in appropriate combination from commonly used polymers such as benzene, polyacrylonitrile, polychlorinated butyl, polyacetic acid butyl and the like. A selection solvent such as hexane, n-hexane, acetone, black mouth form, and water, a good solvent, and a poor solvent are appropriately selected.
- the use of a selective solvent alone for a block copolymer, or the use of a mixed solvent of a good solvent and a poor solvent produces huge grains. This is an important technique for developing the temperature dependence of the structure period of the Mikuguchi phase separation structure. Its working principle is to promote the self-organization of the block copolymer by increasing the biasing force, which is the driving force for microphase separation, using the solvent function.
- cyclohexane can be cited as a selective solvent for the high molecular weight polystyrene block chain, and the one block chain in the block copolymer is dissolved at room temperature or lower. Does not show properties! / Acts as a solvent.
- cyclohexane is soluble in the polybutadiene block chain at all temperatures.
- THF a THF solution in which a small amount of water is added to a polystyrene-polymethyl methacrylate block copolymer
- THF is a good solvent for both block chains of polystyrene and polymethyl methacrylate
- water is a poor solvent for both.
- This THF / water mixed solution dissolves both block chains in the high temperature region 1 but lower than the temperature region 1! And does not dissolve polystyrene in the temperature region 2. However, it is soluble in poly (methyl methacrylate) in the high temperature region even in the temperature region 2.
- a polymer consisting of only one repeating unit, that is, a homopolymer is dissolved in the solvent, and its turbidity is changed while changing the temperature of the solution. It can be evaluated by measuring.
- the block copolymer used in the present invention has a relatively large molecular weight.
- the weight average molecular weight is desirably 1.0 ⁇ 10 5 to 40 ⁇ 10 5 g / mol. More preferably 5.
- Molecular weight force .0 X 10 5 g / mol / J or more the interlayer distance of the lamellar structure may be too narrow, or the distribution of the interlayer distance may appear, and regular grains of the structure may not be formed.
- a molecular weight greater than S40 X 10 5 g / mol is not preferable because it is difficult to polymerize the block copolymer itself.
- the block copolymer used in the present invention is dilute to some extent and is preferably used as a solution that exhibits a structural color.
- the amount of the block copolymer is preferably 1.0 to 15% by mass based on the total amount of the solvent. More preferably, 3.0 to 10% by mass. 1. If it is less than 0% by mass, the viscosity of the block copolymer increases due to the low solution viscosity, and the force that does not form the grains themselves, that is, the microphase separation structure is disturbed. Therefore, it is not preferable. If it is thicker than 15% by mass, the viscosity of the solution will be too high and the mobility of the block copolymer will decrease, resulting in very small grains, and the block copolymer solution will no longer exhibit temperature dependence. Is not preferable.
- the poor solvent in the mixed solvent used in Embodiment 2 of the present invention is preferably 1.0 to 20% by mass with respect to the total amount of the solvent 3.0 to 15% by mass. Is more preferable.
- the amount of the poor solvent is less than 1.0% by mass, the biasing force due to the solvent does not act, and the self-organization of microphase separation is not promoted.
- the amount is more than 20% by mass, the solubility of the block copolymer in the solvent is lowered and the precipitation tends to occur, and the grain becomes very small.
- the method for changing the temperature of the microphase-separated structure having giant grains according to the present invention is the method in which the solution temperature is once allowed to stand while maintaining a certain constant temperature within the temperature range in which the structural color appears. It is desirable to change the temperature slowly and uniformly.
- the change in the structural period of the microphase-separated structure accompanying such a temperature change is determined by the solubility, which is the interaction between the polymer component of the block copolymer and the solvent, and the block co-polymerization is caused by the temperature change. This may be due to the change in the solubility of the polymer in the solvent.
- (2) a single crystal-like giant grain of visible size formed by using the above method, that is, a microphase-separated structure aggregate, is obtained by a simple method without disturbing the structural order. The method for immobilizing the chroma phase separation structure and the immobilized structure will be specifically described.
- the immobilized microphase-separated structure of the present invention comprises a block copolymer, a photopolymerization initiator, and a solvent containing at least a block chain A composed of repeating monomer A and a block chain B composed of repeating monomer B.
- the solvent has a temperature region 1 for dissolving the block chain A and the block chain B and a temperature region 2 for dissolving the block chain B without dissolving the block A, and the temperature region 1 and the temperature region 2 It is formed by irradiating actinic rays to a microphase-separated structure characterized in that the structural period changes by changing the temperature between the two.
- the actinic rays are preferably ultraviolet rays (hereinafter also referred to as UV)! /.
- a polymerization initiator that can be activated by irradiation with actinic rays means that a molecule is cleaved into radicals by irradiation with light, causing a radical polymerization reaction with a photopolymerizable polymer or monomer, thereby increasing the molecular weight of the material.
- radical type photopolymerization initiators that are cross-linked to promote gelation. Examples of the photopolymerization initiator include IRGACURE65 K Chinoku. Specialty Chemicals: Benzyldimethylketanol and IRGACURE184.
- photopolymerization initiators may be used alone or in admixture of two or more.
- the photopolymerization initiator used in the present invention has polymerization reactivity and dispersibility in a solvent depending on the type of block constituting the block copolymer, a combination thereof, and the type of solvent in which the block copolymer is dissolved. Since it is different, the type and addition amount are appropriately selected according to the block copolymer solution.
- the block copolymer having good compatibility with the photopolymerization initiator used in the present invention is one of the polymers. Those having a structure having a gen-based double bond in the mer chain, in particular, one having a polybutadiene skeleton is preferred.
- the photopolymerization initiator used in this case is preferably an alkylphenone photopolymerization initiator having a structure in which a carbonyl group is directly bonded to the benzene ring, and benzyl dimethyl ketal (IRGACURE651) is particularly preferable.
- the addition amount of the photopolymerization initiator used in the present invention is 0.
- the addition ratio of the photopolymerization initiator is less than 0.2% by mass, it is difficult to efficiently perform gelation, and a gel-like immobilized product cannot be obtained.
- the content is more than 20% by mass, the dispersibility in the solvent becomes non-uniform and the micro phase separation structure is easily disturbed, and grains may not be formed. The whole may not be photocured due to light absorption.
- the microphase separation structure before irradiation with actinic rays that is, before gelling and fixing, has a visible size and forms a single crystal-like microphase separation structure. It is desirable that it is done. There is no disorder in the structural order at the time of gelation! / This is an important technical point in producing a microphase separation structure immobilization product.
- the strength of the micro phase separation structure is at least visually recognizable, and the block copolymer solution exhibits a structural color of 30 m or more, more preferably 300 m or more, most preferably 3 mm or more. It is.
- microphase-separated structure-immobilized product is in a gel form and has temperature characteristics.
- the optical device provided with the microphase separation structure prepared by these methods.
- the laser medium a laser dye is preferably used in the present application.
- Embodiment 3 is composed of the microphase separation structure described in Embodiment 1 containing a laser dye, which is contained in a transparent cell, a heating / cooling element, and an excitation source, and the heating / cooling element is an external part.
- the temperature can be arbitrarily controlled temporally or spatially by a power source or a signal source, and the excitation source optically excites the laser dye to oscillate, or It is a tunable laser oscillator characterized by the fact that it is a driving power source that electronically excites laser dyes to oscillate.
- laser dyes include rhodamine derivatives, fluorescein derivatives, and coumarin derivatives.
- heating and cooling elements include Peltier elements.
- examples of the excitation light source include a laser light source, a light bulb, a fluorescent lamp, an LED, a luminescent dye, a semiconductor, and an organic EL.
- the microphase separation structure is a solution, it is put in a transparent glass cell.
- Embodiment 4 is composed of the microphase-separated structure described in Embodiment 1 containing a laser dye, which is contained in a transparent cell, and an excitation source, and the excitation source optically excites the laser dye. It consists of a laser oscillator characterized by being an excitation light source that leads to oscillation or a drive power source that electronically excites laser dyes and leads to oscillation, and a spectroscopic measurement device.
- the temperature around the cell containing the microphase-separated structure according to the first aspect of the present invention is characterized in that the measured laser beam is optically guided to the required location and the wavelength is analyzed by spectroscopy. It is a temperature sensor that can measure
- the color development wavelength that is, the resonator length greatly changes when the temperature slightly changes within a certain temperature range.
- Embodiment 4 functions as a sensitive sensor that can measure the temperature near the cell containing the microphase-separated structure.
- Embodiment 5 includes a transparent cell, a monochromatic light source, a spectroscopic detector, and an analysis device, each including the microphase-separated structure described in Embodiment 1 in which a heating / cooling element is attached and enters the transparent cell.
- the temperature of the heating / cooling element is temporally controllable from an external power source or signal source, and the light source consists of two or more types of monochromatic light, and the spectroscopic detector passes through the cell.
- an optical filter characterized in that the wavelength of light can be measured separately, and an analysis device outputs a signal from the spectroscopic detector as an external signal.
- microphase-separated structure used here has a large change in transmission characteristics in a certain temperature range, it functions as a temperature-dependent optical filter in which the two or more types of monochromatic light may or may not be transmitted depending on the temperature. . ⁇ Example ⁇
- PS polystyrene
- PMMA polymethyl methacrylate
- a dilute solution was prepared by dissolving the sample in THF, which is a good solvent, to a concentration of 10 wt%. When the solution was stirred and water, a poor solvent, was added to a concentration of 6.2 to 9. lwt%, structural color development was observed. When measuring the visible light reflection spectral spectrum of the solution that had a structural color at 300K, a sharp peak due to the structural period of the microphase-separated structure was observed between 540nm and 580nm (Fig. 1). The numbers shown in the legend in Figure 1 are the weight fractions of water in the copolymer solution.
- the microphase separation has a large temperature dependence in which the reflection wavelength is greatly shifted from 30 to 60 nm in the vicinity of 20 ° C to 35 ° C.
- a structure with a water concentration of 6.2 to 7.7 wt% is seen as a microphase-separated structure with no reflection wavelength change in this temperature range. be able to.
- the temperature dependence of the microphase separation structure can be easily controlled simply by arbitrarily selecting the poor solvent concentration in the mixed solvent.
- the reflected wavelength of this solution that is, the resonator length
- the resonator length changes suddenly in a narrow temperature range of 293K to 296K. This result shows that the oscillation wavelength can be drastically changed by a slight temperature difference by using this micro phase separation structure as a resonator.
- PS polystyrene
- PI polyisoprene
- a sample was dissolved in cyclohexane, which is a selective solvent for PS, to a concentration of 7.5 to 8.5 wt% to obtain a dilute solution showing structural color development.
- cyclohexane which is a selective solvent for PS
- the visible light reflectance spectrum was measured by changing the temperature of the obtained solution in the range of 10 to 50 ° C
- the numbers shown in the legend in Figure 3 are the weight fractions of the copolymer in solution.
- the temperature dependence of the microphase-separated structure can be easily controlled by slightly changing the polymer concentration in the solution.
- a visible light reflection spectrum was obtained in the same manner as in Example 2 except that the sample was dissolved in toluene, which is a good solvent for PS and PI, in a predetermined amount (10 to 12% by mass). Obtained (Fig. 4). In contrast to Examples 1 and 2, in such a good solvent, even if the polymer concentration in the solution is changed, it only changes slowly and monotonously with respect to the temperature change, and the temperature dependence cannot be controlled. I understand. The numbers shown in the legend of Figure 4 are the weight fractions of the copolymer in solution.
- PS polystyrene
- PB polybutadiene
- Fig. 7 Before crosslinking, the spectrum shown in the legend in Fig. 7 is the spectrum of the solution, and after crosslinking, the spectrum after 20 minutes of UV irradiation.
- the conversion plot is a plot in which the vertical axis is normalized by the spectral spectrum peak area and the horizontal axis is normalized by the spectral peak wavelength.
- Example 3 The sample synthesized in Example 3 in the selective solvent cyclohexane was dissolved to 8% by mass to prepare a dilute solution, and the photopolymerization initiator IRGAC was further adjusted to 5% by mass with respect to the sample.
- An immobilization product was obtained.
- the reflection spectral spectrum of the gel-like immobilized product is shown in Fig. 8, and the conversion plot is shown in Fig. 9, respectively.
- PS polystyrene
- PB polybutadiene
- Nd YAG laser second harmonic in this solution Pulse laser with wavelength of 532nm
- FIG. 13 shows the spectrum obtained by gradually increasing the average power and introducing light oscillated from the solution into the spectrometer.
- Fig. 14 shows the excitation intensity dependence of the emission intensity.
- the emission spectrum is sharp with a peak at a wavelength of 575 nm, and the emission intensity increases rapidly around the excitation intensity of about 0.2 mW. Therefore, the solution force using a microphase separation structure as a resonator is used. The laser oscillation was confirmed.
- the surface of the cell 1 is a material that has been subjected to necessary optical processing such as anti-reflection coating in the wavelength region used here!
- Light source 2 for optically exciting cell 1 containing a laser dye to cause laser oscillation (for example, when rhodamine 6G is used as a laser dye, a wavelength of 532 nm can be obtained Nd: YAG
- the laser 1 was irradiated with the excitation light 3 from the second harmonic of the laser) and applied to the cell 1 containing the laser dye and laser resonator structure.
- the resonator length formed in the cell 1 changes with temperature as shown in FIG. 2, a laser oscillator whose output wavelength can be controlled by temperature is obtained. It has a temperature dependence indicated by the square symbol in Fig. 2, and the laser light with a wavelength of 607 nm is obtained when the temperature of cell 1 containing a solution containing rhodamine 6G is 2 94 K, and 576 nm when 296 K is used. Was oscillated.
- the laser medium and excitation light source in this configuration may be an electron source instead of a light source when the laser crystal or semiconductor laser structural material is used as the laser medium. Then clearly state things.
- the cell 1, the excitation light source 2 and the excitation light 3 in FIG. 17 are configured in the same manner as in Example 5, and the cell 1 is in contact with the pipe 5 which is the temperature detection object, and the medium inside the pipe 5 (for example, Various gases , Cooling water, etc.) was arranged to propagate to cell 1.
- the surface of cell 1 is made of a material that has been subjected to the necessary optical treatment such as anti-reflection coating in the wavelength region used here.
- Example 5 In the same manner as in Example 5, the cell 1 was irradiated with excitation light 3 from the excitation light source 2 to cause laser oscillation.
- Cell 1 contains a microphase separation structure in which the resonator length changes according to the temperature shown in Example 1, and the wavelength of the laser light oscillated from cell 1 changes depending on the temperature of the medium flowing through pipe 5. .
- This laser may be detected by a spectral detector 8 capable of directly wavelength resolving, or may be spectrally detected through an optical fiber 7.
- laser light 6 had a wavelength of 607nm, and when the water temperature was 305K, it had a wavelength of 565nm.
- This temperature sensor is applied to an element that displays the temperature of an object to be detected, controls the temperature, and displays the temperature change in color, etc., and uses the laser light to transmit the temperature to a remote location. It has a feature that enables measurement.
- the laser medium or excitation light source in this configuration may be an electron source or current source instead of a light source when a laser crystal or semiconductor laser structural material is used as the laser medium. State that there is nothing.
- the block copolymer consisting of polystyrene-polymethyl methacrylate shown in Example 1 is added to a 10% by mass tetrahydrofuran solution so that it becomes 9.1% by mass with respect to the 10% by mass tetrahydrofuran solution.
- a heating / cooling element 4 that can be controlled from an external power source or a signal source is mounted around an optically transparent cell 9 containing a microphase separation structure solution to which water has been added.
- Monochromatic light 11 having a wavelength of 610 nm and monochromatic light 11 having a wavelength of 575 nm are incident on a cell 9 from a monochromatic light source 10 composed of a laser diode or a light emitting diode, respectively.
- Necessary optical performance such as optically anti-reflective coating is added to the cell surface.
- the thickness and size of the cell are appropriately controlled in consideration of its temperature response characteristics and optical characteristics.
- the temperature of the cell is changed by changing the temperature of the heating / cooling element 4 based on a signal from an external power source or a signal source.
- the temperature is 20 ° C. or lower, the light of 610 nm is reflected and cannot pass through the cell, and only the light of 575 nm passes.
- the temperature is 22 ° C or higher, 575 ⁇ m light is reflected and only 610nm light can pass.
- this device When different information is superimposed on each laser beam and transmitted, this device functions as a wavelength selective light filter.
- this device functions as a wavelength selective light filter.
- the wavelength change region can be changed. As shown in Fig. 19, it is possible to create a multiple wavelength selection filter that can select multiple laser wavelengths by arranging them in series.
- FIG. 1 is a diagram showing the water dependence of the reflection spectrum at 300 K of a microphase-separated structure composed of a THF / water mixed solution of PS-b-PMMA showing structural color development.
- the horizontal axis is wavelength.
- FIG. 2 is a graph showing the temperature dependence of the maximum absorption wavelength of the spectral spectra of solutions having different water concentrations in FIG.
- FIG. 3 is a graph showing the temperature dependence of the maximum absorption wavelength of the spectral spectrum of a microphase-separated structure composed of a cyclohexane solution of PS-b-PI showing structural coloration at various copolymer concentrations.
- FIG. 4 is a graph showing the temperature dependence of the maximum absorption wavelength of the spectral spectrum of a good solvent toluene solution at various copolymer concentrations.
- FIG. 5 A photograph showing a 3 wt% cyclohexane solution of PS-b-PB (containing a photopolymerization initiator IRGACURE651) in which giant dahrain was observed.
- the scale of the ruler is lmm.
- FIG. 6 The gel microphase separation structure immobilization product obtained from the solution of FIG. 5 and the solution of FIG. It is a figure which shows a spectrum.
- FIG. 7 is a diagram plotting the spectral spectrum of FIG. 6 in conversion.
- FIG. 8 is a diagram showing a spectrum of PS-b-PB in an 8 wt% cyclohexane solution (containing a photopolymerization initiator IRGACURE651) and a gel-like microphase-separated structure-immobilized product obtained from this solution.
- FIG. 9 is a conversion plot of the spectrum of FIG.
- FIG. 10 shows the spectral spectra of the solution (containing photopolymerization initiator 1,1-ji (t-butylperoxy) -3,3,5-trimethylcyclohexane) and the gel microphase separation structure immobilization product obtained from this solution.
- FIG. 1 shows the spectral spectra of the solution (containing photopolymerization initiator 1,1-ji (t-butylperoxy) -3,3,5-trimethylcyclohexane) and the gel microphase separation structure immobilization product obtained from this solution.
- FIG. 11 is a conversion plot of the spectrum of FIG.
- FIG. 12 Reflection spectrum at 300K of a microphase-separated structure composed of a THF / water mixed solution of PS-b-PtBuMA showing structural coloration.
- FIG. 13 An emission spectrum of a laser oscillator using a micro phase separation structure composed of a THF / water mixed solution of PS-b-PtBuMA showing structural color development as a laser resonator.
- FIG. 14 Excitation intensity dependence of the oscillation intensity of a laser oscillator using a microphase separation structure composed of a THF / water mixed solution of PS-b-PtBuMA showing structural coloration.
- FIG. 15 A tunable laser oscillator composed of a microphase-separated structure containing a laser dye, an excitation light source, and a heating / cooling element.
- FIG. 16 shows an emission spectrum when the excitation light intensity does not exceed the laser threshold.
- FIG. 17 A temperature sensor composed of a microphase-separated structure containing a laser dye and an excitation light source.
- FIG. 18 An optical filter comprising a microphase separation structure solution cell equipped with a heating element.
- FIG. 19 A multi-wavelength selective optical filter with a microphase-separated structure solution cell equipped with a heating element.
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- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
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- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Graft Or Block Polymers (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
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- Lasers (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/311,915 US8143343B2 (en) | 2006-10-20 | 2007-08-30 | Microphase-separated structure, immobilized microphase-separated structure and wavelength-variable laser oscillator, temperature sensor and light filter using the structure |
JP2008539695A JP5531226B2 (ja) | 2006-10-20 | 2007-08-30 | ミクロ相分離構造体、固定化されたミクロ相分離構造体、および該構造体を備えた波長可変レーザー発振器、温度センサー、及び光フィルター |
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JP2006-286089 | 2006-10-20 | ||
JP2006286089 | 2006-10-20 | ||
JP2006286085 | 2006-10-20 | ||
JP2006-286085 | 2006-10-20 |
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PCT/JP2007/066939 WO2008047514A1 (fr) | 2006-10-20 | 2007-08-30 | Structure de séparation des microphases, structure immobilisée de séparation des microphases et oscillateur laser à longueur d'ondes variable, sonde thermique et filtre à lumière utilisant cette structure |
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US (1) | US8143343B2 (ja) |
JP (1) | JP5531226B2 (ja) |
WO (1) | WO2008047514A1 (ja) |
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JP4925029B2 (ja) | 2005-04-01 | 2012-04-25 | 独立行政法人物質・材料研究機構 | 切断あるいは曲げ加工を可能とするレーザー共振器製造方法 |
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US8143343B2 (en) | 2012-03-27 |
JPWO2008047514A1 (ja) | 2010-02-18 |
JP5531226B2 (ja) | 2014-06-25 |
US20100103414A1 (en) | 2010-04-29 |
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