KR20120001386A - Dispersion method of carbon-nanotube and method for fabricating flexible transparent conductive flim using the same - Google Patents

Dispersion method of carbon-nanotube and method for fabricating flexible transparent conductive flim using the same Download PDF

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KR20120001386A
KR20120001386A KR1020100062135A KR20100062135A KR20120001386A KR 20120001386 A KR20120001386 A KR 20120001386A KR 1020100062135 A KR1020100062135 A KR 1020100062135A KR 20100062135 A KR20100062135 A KR 20100062135A KR 20120001386 A KR20120001386 A KR 20120001386A
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plasma
carbon nanotubes
transparent conductive
carbon
conductive film
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KR1020100062135A
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Korean (ko)
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신의철
정구환
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강원대학교산학협력단
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82B—NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS, MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES AS DISCRETE UNITS; MANUFACTURE OR TREATMENT THEREOF
    • B82B3/00—Manufacture or treatment of nanostructures by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/15—Nano-sized carbon materials
    • C01B32/158—Carbon nanotubes
    • C01B32/168—After-treatment
    • C01B32/174—Derivatisation; Solubilisation; Dispersion in solvents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2202/00—Structure or properties of carbon nanotubes
    • C01B2202/20—Nanotubes characterized by their properties
    • C01B2202/28—Solid content in solvents

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  • Nanotechnology (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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  • Physics & Mathematics (AREA)
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Abstract

PURPOSE: A method for manufacturing a carbon nano-tube dispersing solution and a method for manufacturing a flexible transparent conductive film using the same are provided to improve the dispersibility of carbon-nano-tube without the addition of a surfactant, a binder, and nano-particles. CONSTITUTION: Carbon nano-tubes are prepared and surface-treated based on plasma in order to introduce hydrophilic functional group on the surfaces of the carbon nano-tubes(S10, S20). The surface-treated carbon nano-tubes are mixed with a solvent(S30). Plasma forming gas for the surface treatment is argon or ammonia. The hydrophilic functional group is carboxylic group or amine group. The surface treatment is implemented based on a plasma enhanced chemical vapor deposition method.

Description

Manufacturing method of carbon nanotube dispersion and flexible transparent conductive film using the same {DISPERSION METHOD OF CARBON-NANOTUBE AND METHOD FOR FABRICATING FLEXIBLE TRANSPARENT CONDUCTIVE FLIM USING THE SAME}

The present invention relates to a method for dispersing carbon nanotubes, and more particularly, to a method for dispersing carbon nanotubes using plasma surface treatment.

Carbon nanotubes (CNTs) are in the spotlight as next generation materials to replace existing materials due to their excellent electrical, physical and chemical properties.

Carbon nanotubes are being researched for various applications such as LED, OLED, next-generation displays, touch screens, electronic paper, electromagnetic shielding / absorbers, and antistatic composites.

As described above, the display materials are driven by the conduction characteristics obtained by appropriately coating or blending a conductive material on a substrate or a matrix of the composite material.

Currently, indium tin oxide (ITO) thin films used as conductive thin films are urgently required to develop alternative materials due to the high price of indium, a rare resource that is being depleted.

Carbon nanotubes have theoretical electrical conductivity that surpasses metals, and have excellent mechanical properties such as high elasticity, so they are attracting attention as an optimal material for various transparent conductive film applications.

In particular, since it can implement the flexibility that the existing ITO thin film is not having a greater expectation.

In order to apply carbon nanotubes to a transparent conductive film for display devices, it is important to apply carbon nanotubes uniformly dispersed in a liquid phase to a substrate.

On the other hand, carbon nanotubes act as van der Waals attraction between each other, causing strong agglomeration in the liquid phase, which is one of the great challenges in applying the transparent conductive film material to carbon nanotubes.

In order to uniformly disperse these carbon nanotubes in the liquid phase, various materials such as surfactants, binders, nanoparticles, etc. are added to the solvent to increase the dispersing effect.

However, adding the surfactant, the binder nanoparticles, etc. as described above requires a number of additional processes, and the added organic / inorganic impurities have a problem of inhibiting the excellent electrical properties of the carbon nanotubes.

The present invention is designed to solve the above problems, the method of preparing a carbon nanotube dispersion liquid uniformly dispersed in a solvent by introducing a hydrophilic functional group on the surface of the carbon nanotubes by plasma surface treatment on the carbon nanotubes and flexibility using the same It is an object to provide a method for producing a transparent conductive film.

The carbon nanotube dispersion method according to a preferred embodiment of the present invention for achieving the above object comprises the steps of providing a carbon nanotube, the surface of the carbon nanotube to introduce a hydrophilic functional group on the surface of the carbon nanotube plasma surface Treating, and mixing the surface-treated carbon nanotubes in a solvent.

Plasma forming gas for the plasma surface treatment is characterized in that the argon (Ar) or ammonia (NH 3 ).

In addition, the hydrophilic functional group includes a carboxy group (-COOH) or an amine group (-NH 2 ).

The plasma surface treatment is characterized by plasma-assisted chemical vapor deposition (PECVD).

According to another preferred embodiment of the present invention, a method of manufacturing a transparent conductive film may include providing a transparent substrate, providing a carbon nanotube, and introducing the carbon nanotube to a surface of the carbon nanotube so as to introduce a hydrophilic functional group to the surface of the plasma. Treating, mixing the surface-treated carbon nanotubes in a solvent to prepare a carbon nanotube dispersion, and applying the carbon nanotube dispersion to the surface of the transparent polymer substrate.

The transparent substrate is characterized in that the polyethylene terephthalate (PET).

The plasma forming gas may be argon (Ar) or ammonia (NH 3 ).

In addition, the hydrophilic functional group is characterized in that it comprises a carboxy group (-COOH) or an amine group (-NH 2 ).

Application of the carbon nanotube dispersion is characterized in that it is made by spray injection.

As described above, according to the method for producing a carbon nanotube dispersion and a method for producing a transparent conductive film according to the present invention have the following effects.

By introducing a hydrophilic functional group on the surface of the carbon nanotubes by plasma surface treatment, dispersibility of the carbon nanotubes can be greatly improved without adding surfactants, binders, nanoparticles, and the like in the solution.

Dispersion obtained by dispersing carbon nanotubes surface-treated with plasma using argon or ammonia gas in a solvent may be applied to a transparent polymer substrate, thereby manufacturing a flexible transparent conductive film having greatly reduced sheet resistance.

In addition, it is possible to manufacture a flexible transparent conductive film having a low sheet resistance, thereby enabling the application of the present invention to various applications such as flexible displays, touch screens, electronic paper, electromagnetic shielding / absorption, antistatic materials, flexible solar cells, and the like.

Figure 1 is a flow chart schematically showing the manufacturing process of the carbon nanotube dispersion according to the present invention.
Figure 2 is a schematic diagram of a direct current plasma equipment for the surface treatment of carbon nanotubes according to the present invention.
3 is a graph showing XPS analysis results (C1s spectrum) showing hydrophilic functional groups of argon (b) and ammonia (c) plasma functionalized carbon nanotubes according to the present invention. .
Figure 4 is a digital photograph image showing the difference in dispersion efficiency of the carbon nanotubes (left) untreated plasma and the argon (b), ammonia (c) plasma surface (functionalized) treated carbon nanotubes according to the present invention.
FIG. 5 is a graph showing the sheet resistance measurement results of a flexible transparent conductive film prepared by spray coating using carbon nanotubes without plasma surface treatment and carbon nanotubes with argon and ammonia plasma surface treatment according to the present invention.
6 is a digital image of a carbon nanotube-based flexible transparent conductive film treated with a plasma surface (functionalized) according to the present invention.
7 is an AFM (Atomic Force Microscope) image of a carbon nanotube-based flexible transparent conductive film treated with a plasma surface (functionalized) according to the present invention.
8 is a photograph showing that the flexible transparent conductive film coated with plasma functionalized carbon nanotubes according to the present invention shows conductivity.
9 is a graph showing the sheet resistance and transmittance of a carbon nanotube-based flexible transparent conductive film treated with a plasma surface (functionalization) according to the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and are common in the art to which the present invention pertains. It is provided to fully inform those skilled in the art of the scope of the invention, which is to be defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, a method of preparing a carbon nanotube dispersion according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

Figure 1 is a flow chart schematically showing the manufacturing process of the carbon nanotube dispersion according to the present invention.

As shown in FIG. 1, in the preferred embodiment of the present invention, the method for preparing carbon nanotubes may include providing carbon nanotubes (S10) and introducing the hydrophilic functional group to the surface of the carbon nanotubes. Plasma surface treatment of the tube (S20), and mixing the surface-treated carbon nanotubes in a solvent (S30).

In the step of providing the carbon nanotubes (S10), the carbon nanotubes are allotrope of carbon, and one carbon (C) atom is bonded to three other carbon atoms to form a hexagonal honeycomb pattern in which the graphite plate is rounded to a nano size diameter. It is a hollow material.

The carbon nanotubes include single-walled nanotubes, multi-walled nanotubes, and bundled nanotubes.

The diameter and length (axial direction) of the carbon nanotubes are not particularly limited.

Thereafter, plasma surface treatment is performed to introduce hydrophilic functional groups to the surface of the provided carbon nanotubes.

2 is a schematic diagram of a plasma apparatus for plasma surface treatment according to an embodiment of the present invention.

Plasma surface treatment of the carbon nanotubes according to the present embodiment is performed in a plasma apparatus.

Referring to FIG. 2, in the plasma apparatus, a gas injection unit 11 for supplying an atmosphere gas into the reaction chamber 10 is disposed on a part of a side wall of the reaction chamber 10, and the reaction unit controls the reaction gas. Flow meter (not shown) is installed.

In addition, a gas exhaust unit 13 for discharging the atmosphere gas reacted in the reaction chamber 10 is disposed at a part of the other side wall of the reaction chamber 10, and a vacuum pump is connected to the exhaust chamber so that the reaction chamber 10 is connected. Control the degree of vacuum inside.

An upper electrode 20 is installed above the reaction chamber 10, and a lower electrode 21 is installed below. The lower electrode 21 may also be used as a substrate support, and a resistance heating element 23 capable of heating the lower electrode 21 may be disposed on the upper portion of the lower electrode 21 as needed.

The resistance heating element 23 may be configured in the form of a coil.

The reaction chamber 10 forms a plasma in a space between the upper electrode 20 and the lower electrode 21 by applying a high frequency voltage from a power source. As a power source for applying high frequency voltage, various kinds of power sources such as direct current, alternating current, and microwave can be used.

Plasma surface treatment of carbon nanotubes using the plasma apparatus as described above.

In the plasma surface treatment S20, first, carbon nanotubes are charged into a die 31 disposed on the lower electrode 21 in the reaction chamber 10. In this state, the vacuum pump is operated to control the degree of vacuum in the reaction chamber 10.

The degree of vacuum in the reaction chamber 10 is preferably controlled to 10 −3 torr or less.

In addition, the flowmeter of the gas injection unit 11 is controlled to supply the reaction gas into the reaction chamber 10. At this time, the reaction gas to be supplied is preferably argon (Ar) or ammonia (NH 3 ).

The temperature in the reaction chamber 10 to which the reaction gas is supplied is room temperature, and the pressure is adjusted to 0.01 to 10 torr, preferably to 0.5 torr.

In this state, when the plasma power supply is operated to apply a DC voltage, plasma is generated from the reaction gas. When the direct current voltage is applied, the upper electrode 20 becomes the ground electrode, and the direct current voltage is applied to the lower electrode 21.

The applied voltage can be adjusted within 100V ~ 800V and preferably can be adjusted to 350V.

On the other hand, in order to generate a plasma, a high frequency voltage may be applied in addition to the DC voltage.

In addition, the plasma surface treatment time may be 1 minute to 60 minutes, but preferably 10 minutes.

When the carbon nanotubes are surface treated with the plasma generated in the reaction chamber 10, hydrophilic functional groups such as carboxyl group (-COOH) and amine group (NH 2 ) are introduced to the surface of the carbon nanotubes, thereby making the carbon nanotubes hydrophilic. Can be modified.

Mixing the surface-treated carbon nanotubes into a solvent (S30) is to mix the liquid to disperse or dissolve the carbon nanotubes, the solvent may be water or any organic solvent miscible with water can be used. .

As the organic solvent, methanol, ethanol, acetone, acetonitrile, isopropanol and the like may be used, but is not limited thereto.

When the surface-treated carbon nanotubes are mixed with an organic solvent, the carbon nanotubes are uniformly dispersed in the solvent by the hydrophilic functional groups formed on the surface of the carbon nanotubes.

According to another preferred embodiment of the present invention, a method of manufacturing a transparent conductive film may include providing a transparent substrate, providing a carbon nanotube, and introducing the carbon nanotube to a surface of the carbon nanotube so as to introduce a hydrophilic functional group to the surface of the plasma. The step of treating, mixing the surface-treated carbon nanotubes in a solvent to prepare a carbon nanotube dispersion, and applying the carbon nanotube dispersion on the surface of the transparent polymer substrate.

The transparent substrate may be a polymer substrate such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polyethylene sulfone (PES), cycloolefin copolymer (COC), polyarylate (PAR), etc. have.

In the step of providing the carbon nanotubes, the carbon nanotubes are allotrope of carbon, and the hollowed out graphite plate in which one carbon (C) atom is combined with three other carbon atoms to form a hexagonal honeycomb pattern rounded to a nano size diameter It is a substance in the form.

The carbon nanotubes include single walled nanotubes, multi-walled nanotubes, and bundled nanotubes.

The diameter and length (axial direction) of the carbon nanotubes are not particularly limited.

Plasma surface treatment first places carbon nanotubes on the lower electrode 21 in the reaction chamber 10. In this state, the vacuum pump is operated to control the degree of vacuum in the reaction chamber. In addition, the flow meter of the gas injection unit 11 is controlled to supply the reaction gas into the reaction chamber 10. At this time, the reaction gas to be supplied is preferably argon (Ar) or ammonia (NH 3 ).

In this state, when the plasma power supply is operated to supply a high frequency voltage to the electrode, plasma is generated from the reaction gas.

When the carbon nanotubes are surface treated with the plasma generated in the reaction chamber 10, hydrophilic functional groups such as carboxyl group (-COOH) and amine group (NH 2 ) are introduced to the surface of the carbon nanotubes, thereby making the carbon nanotubes hydrophilic. Can be modified.

The preparing of the carbon nanotube dispersion may be performed by mixing the carbon nanotube in a liquid for dispersing or dissolving the carbon nanotube. The solvent may be water or any organic solvent miscible with water.

As the organic solvent, methanol, ethanol, acetone, acetonitrile, isopropanol, etc. may be used, but is not limited thereto, and any material may dissolve carbon nanotubes.

When the surface-treated carbon nanotubes are mixed with an organic solvent, the carbon nanotubes are uniformly dispersed in the solvent by the hydrophilic functional groups formed on the surface of the carbon nanotubes.

The dispersion in which the carbon nanotubes are uniformly dispersed may be applied to the surface of the transparent polymer substrate by spray coating, spin coating, screen coating, inkjet printing, dip coating, or the like to form a transparent conductive film.

Hereinafter, a method of manufacturing a plasma-treated carbon nanotube dispersion according to the present invention and an embodiment of a flexible transparent conductive film using the same will be described in detail. However, the following examples are merely to illustrate the invention, but the content of the present invention is not limited by the following examples.

<Examples>

Carbon nanotubes having a diameter of 3 nm to 100 nm and a length of several μm to 1 mm were charged into a plasma-supported chemical vapor deposition machine (PECVD), and a vacuum pump was operated to control the vacuum in the reaction chamber to 10 −3 torr or less. In addition, the flow meter of the gas injection unit was controlled to supply argon (Ar) gas into the reaction chamber.

At this time, the conditions of the reaction chamber were at room temperature, the pressure was adjusted to 0.5torr, and a plasma was generated by applying a voltage of 350V to the substrate, and the conditions for generating the plasma were maintained for 10 minutes.

In the plasma surface treatment of the carbon nanotubes, the reaction gas was injected into the plasma generating apparatus at a flow rate of 0.01 to 1.0 l / min, and the power during plasma generation was 1 to 50 W.

The carbon nanotubes having the plasma surface treatment were mixed with ethanol as a solvent at a concentration of carbon nanotubes: ethanol = 1 mg: 150 mL to prepare a carbon nanotube dispersion.

The carbon nanotube dispersion prepared as described above was applied to the polyethylene terephthalate (PET) substrate which is a transparent polymer substrate by spray spraying.

The thickness of the carbon nanotube conductive film of the PET substrate on which the carbon nanotube dispersion was dried was 65 nm. The sheet resistance of argon plasma surface treated carbon nanotubes was measured.

As described above, experiments were performed identically for ammonia plasma surface treatment.

FIG. 3 is an XPS analysis result (C1s spectrum) showing hydrophilic functional groups of carbon nanotubes (a) that are not plasma treated, argon (b), and ammonia (c) plasma functionalized carbon nanotubes according to an embodiment of the present invention. Is a graph.

As shown in FIG. 3, even when the plasma treatment is not performed, peaks of COOH, C = O, and -OH due to natural oxidation are shown. However, when argon plasma treatment, the intensity of the peaks is increased. Able to know. This indicates that the carbon nanotubes are functionalized with hydrophilic functional groups.

In addition, it can be seen that the electron donating hydrophilic functional groups such as amine, imine, amide and imide are introduced in addition to the ammonia plasma treatment. Such electron donating properties contribute to lowering sheet resistance when a transparent conductive film is prepared using a plasma-treated carbon nanotube dispersion.

4 is a digital photograph image showing a difference in dispersion efficiency of carbon nanotubes (left) that are not plasma-treated and argon (center) and ammonia (right) plasma functionalized carbon nanotubes according to the present invention.

As shown in FIG. 4, it can be seen that the dispersion degree of the carbon nanotubes treated with plasma was increased, and that the carbon nanotubes showed very good dispersion degree when the ammonia plasma functionalization was performed.

In FIG. 4, the solvent used was ethanol and the concentration was carbon nanotube: ethanol = 1 mg: 150 mL.

FIG. 5 is a graph showing sheet resistance measurement results of a flexible transparent conductive film prepared by spray coating using carbon nanotubes without plasma surface treatment and argon and ammonia plasma functionalized carbon nanotubes according to the present invention.

In FIG. 5, the thickness of the carbon nanotube-based transparent conductive film used for measuring sheet resistance was 65 nm.

In FIG. 5, the sheet resistance of the carbon nanotube-based transparent conductive film that is not plasma-treated is 41,992 ohm / sq, and the resistance of the argon plasma-treated carbon nanotube-based transparent conductive film is 63,614 ohm / sq, based on ammonia plasma-treated carbon nanotubes. The transparent conductive film had a resistance of 30,312 ohm / sq.

6 is a digital image of a plasma-functionalized carbon nanotube-based flexible transparent conductive film according to the present invention. As shown in Figure 6, it can be seen that the transparency of the conductive film according to the present invention is good.

FIG. 7 shows that carbon nanotubes are uniformly dispersed in an AFM (Atomic Force Microscope) photograph of a plasma-functionalized carbon nanotube-based flexible transparent conductive film according to the present invention.

8 is a photograph showing that the flexible transparent conductive film coated with plasma functionalized carbon nanotubes according to the present invention shows conductivity.

Figure 9 is a graph showing the sheet resistance and transmittance of the plasma functionalized carbon nanotube-based flexible transparent conductive film according to the present invention.

As shown in FIG. 9, it can be seen that the sheet resistance decreases rapidly as the thickness of the coated carbon nanotubes increases from about 25 nm to 60 nm.

On the other hand, it can be seen that as the thickness of the carbon nanotubes increases, the transmittance decreases relatively slowly.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. .

10 reaction chamber 11 gas injection unit
13: gas exhaust 15: vacuum pump
20: upper electrode 21: lower electrode
23: resistive heating element 31: die

Claims (9)

Providing carbon nanotubes;
Plasma surface treating the carbon nanotubes to introduce a hydrophilic functional group to the surface of the carbon nanotubes; And
Method of producing a carbon nanotube dispersion comprising the step of mixing the surface treated carbon nanotubes in a solvent. The method of claim 1,
The plasma forming gas for the plasma surface treatment is argon (Ar) or ammonia (NH 3 ) The method of producing a carbon nanotube dispersion, characterized in that. The method of claim 1,
The hydrophilic functional group is a method for producing a carbon nanotube dispersion containing a carboxy group (-COOH) or an amine group (-NH 2 ). The method according to any one of claims 1 to 3,
Wherein said plasma surface treatment is carried out by plasma-assisted chemical vapor deposition (PECVD). Providing a transparent substrate;
Providing carbon nanotubes;
Plasma surface treating the carbon nanotubes to introduce a hydrophilic functional group to the surface of the carbon nanotubes;
Preparing a carbon nanotube dispersion by mixing the surface-treated carbon nanotubes in a solvent; And
The method of manufacturing a transparent conductive film comprising applying the carbon nanotube dispersion on the surface of the transparent polymer substrate. The method of claim 5, wherein
The transparent substrate is a method for producing a transparent conductive film, characterized in that the polyethylene terephthalate (PET). The method of claim 5, wherein
The plasma forming gas during the plasma surface treatment is argon (Ar) or ammonia (NH 3 ) The method of manufacturing a transparent conductive film, characterized in that. The method of claim 5, wherein
The hydrophilic functional group is a method for producing a transparent conductive film, characterized in that it comprises a carboxy group (-COOH) or an amine group (-NH 2 ). The method according to any one of claims 5 to 8,
The coating method of the carbon nanotube dispersion is a method of manufacturing a transparent conductive film, characterized in that by spraying.
KR1020100062135A 2010-06-29 2010-06-29 Dispersion method of carbon-nanotube and method for fabricating flexible transparent conductive flim using the same KR20120001386A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104030267A (en) * 2014-05-15 2014-09-10 太原理工大学 Method for rapid preparation of graphitized fluorescent carbon dots

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104030267A (en) * 2014-05-15 2014-09-10 太原理工大学 Method for rapid preparation of graphitized fluorescent carbon dots

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