CN114149001B - Self-assembled carbon nano tube array preparation, transfer and orientation determination method for terahertz - Google Patents
Self-assembled carbon nano tube array preparation, transfer and orientation determination method for terahertz Download PDFInfo
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- CN114149001B CN114149001B CN202111578685.4A CN202111578685A CN114149001B CN 114149001 B CN114149001 B CN 114149001B CN 202111578685 A CN202111578685 A CN 202111578685A CN 114149001 B CN114149001 B CN 114149001B
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Abstract
The invention discloses a method for preparing, transferring and determining orientation of a self-assembled carbon nano tube array for terahertz. The method prepares the high-density carbon nanotube array on the filter membrane by a vacuum filtration device, and can realize the preparation of the horizontally arranged directional arranged carbon nanotube film by combining the assistance of the gold electrode, wherein the conducting direction of the gold electrode is the arrangement direction of the carbon nanotubes. The method can prepare the carbon nanotube array (directional/non-directional arrangement) with the nano-scale thickness, realizes the rapid transfer of the carbon nanotube array in a simple and environment-friendly mode, and simultaneously determines the orientation of the directional arrangement carbon nanotubes by a rapid and nondestructive method, thereby having higher application value in the field of preparation of terahertz devices based on the carbon nanotubes.
Description
Technical Field
The invention relates to a preparation and treatment method of a carbon nano tube in the field of self-assembled carbon nano tube arrays, in particular to a preparation, transfer and orientation determination method of a self-assembled carbon nano tube array for terahertz.
Background
Carbon nanotubes are one-dimensional nanomaterials with high conductivity, which exhibit a peculiar photoelectric effect, and are widely used for the preparation of terahertz photoelectric devices such as photodetectors, polarizers, and absorbers.
Compared with the preparation of the carbon nano tube by the vapor deposition method, the self-assembly arrangement carbon nano tube technology can obtain the carbon nano tube with high purity, single chirality and nano-scale thickness, and can better exert the photoelectric property of the carbon nano tube. At present, the transfer method aims at the self-assembled carbon nano tube film and is chemical wet etching, namely, the principle that a target substrate and a carbon nano tube are insoluble in chloroform by utilizing the property that a filter membrane is soluble in chloroform is utilized, so that the transfer from the self-assembled carbon nano tube to the target substrate is realized. The chloroform used in the method has certain toxicity to human body, is an environment-friendly reagent, and meanwhile, the chloroform needs a certain time for dissolving the filter membrane, and usually the whole transferring step takes 20 minutes; in addition, since chloroform and a high molecular polymer are swelled, the transfer of the carbon nanotubes to polydimethylsiloxanes and flexible substrates which are swelled with chloroform cannot be realized by the method; the wet transfer also causes the phenomenon that the transferred carbon nano tube has voids and is nonuniform due to the fact that the van der Waals force of the carbon nano tube and the target substrate are not tightly combined; in addition, for the directional arrangement of the carbon nanotubes, the current method for obtaining the arrangement direction of the carbon nanotubes mainly comprises a raman spectroscopy technology, a terahertz spectroscopy technology and a scanning electron microscope, but the steps of the methods are complicated and the samples are damaged.
Disclosure of Invention
The invention aims to realize the preparation of a carbon nano tube array by a self-assembly technology, overcomes the defects of the existing wet transfer self-assembly carbon nano tube, and provides a terahertz functional device which transfers the self-assembly carbon nano tube array to a flexible substrate in a green, friendly, simple and quick manner, and can determine the arrangement direction of the oriented carbon nano tube by a simple, quick and nondestructive method at the same time.
The invention realizes self-assembly of the carbon nano tube, overcomes the swelling phenomenon of the organic solvent and the flexible substrate, transfers the uniform and hollow-free self-assembled carbon nano tube array to the flexible substrate in a shorter time by a green friendly method, and determines the arrangement direction of the directional arranged carbon nano tube by a simple, rapid and lossless method.
The technical scheme of the invention is as follows:
1. a self-assembled carbon nanotube array preparation device for terahertz is provided:
the device comprises a glass bottle, a vacuum pump, a vacuum bottle, a rubber plug, a connecting pipe fitting, a filter membrane and a conduit; the glass bottle is arranged above the vacuum bottle, the bottom of the glass bottle is provided with an opening, the opening is communicated to the inside of the vacuum bottle through a connecting pipe fitting, a filter element is arranged at the joint of the connecting pipe fitting and the bottom opening of the glass bottle, a filter membrane is covered on the filter element, a carbon nano tube solution is covered on the filter membrane, and the vacuum bottle is communicated with the vacuum pump through a conduit; the pipeline of the connecting pipe fitting is connected with the vacuum bottle through the rubber plug, and the rubber plug is filled in the pipeline of the connecting pipe fitting.
The filter membrane is provided with a pair of gold electrodes and an adjustable power supply, wherein the pair of gold electrodes are arranged on the filter membrane at intervals, and the pair of gold electrodes are respectively connected to two ends of the adjustable power supply after being respectively connected with the wires.
The output voltage of the adjustable power supply is adjustable.
The connecting line direction of the pair of gold electrodes is parallel to the nano-scale groove direction in the filter membrane.
The glass bottle is used for placing the carbon nanotube solution.
The connecting pipe fitting comprises a tray body positioned at the upper part and a pipe body positioned at the lower part, wherein the tray body is embedded in an opening at the bottom end of the glass bottle, the surface of the tray body is provided with a filter element and a filter membrane in a stacking way from bottom to top, the upper end of the pipe body is concentrically connected to a central through hole of the tray body, and the lower end of the pipe body extends into the vacuum bottle.
The pore diameter of the filter membrane is smaller than the length of a single carbon nano tube. The filter membrane is specifically a Whatman Nuclepore Track-Etched membrane, and the model is 111106 products or series or model.
2. A preparation method of a self-assembled carbon nano tube array for terahertz comprises the following steps:
for non-directional arrangement of carbon nanotubes, the device is adopted, and a filter membrane soaked by deionized water is covered on the connecting pipe fitting; adding the carbon nanotube solution into a glass bottle, then opening a vacuum pump, enabling non-carbon nanotube substances in the carbon nanotube solution in the glass bottle to flow into the vacuum bottle, gradually depositing the carbon nanotube array on a filter membrane, stopping suction filtration for a period of time after no liquid flows into the vacuum bottle, and obtaining the self-assembled carbon nanotube array on the filter membrane.
For the oriented carbon nanotubes which are horizontally arranged, the device is adopted, a filter membrane which is soaked by deionized water is covered on a connecting pipe fitting, a pair of gold electrodes are fixed on the filter membrane, the connecting line direction between the pair of gold electrodes is parallel to the nano-level groove direction on the filter membrane, and the pair of gold electrodes are electrically connected with two ends of an adjustable power supply by a lead; adding a carbon nano tube solution into a glass bottle, turning on an adjustable power supply and setting voltage to enable the carbon nano tube array to be deposited on a filter membrane gradually, when the volume of the solution in the glass bottle is 10% -20% of the added volume, turning on a vacuum pump again, enabling non-carbon nano tube substances in the carbon nano tube solution in the glass bottle to flow into the vacuum bottle, enabling the carbon nano tube array to continue to be deposited on the filter membrane gradually, stopping suction filtration for a period of time after no liquid flows into the vacuum bottle, and obtaining the self-assembled carbon nano tube array on the filter membrane.
The present invention is directed to preparing horizontally aligned carbon nanotubes only, and not to preparing vertically aligned carbon nanotubes.
According to the invention, the gold electrode is arranged on the filter membrane, and the deposition position of the carbon nano tube is controlled through voltage arrangement and nano-scale groove guiding on the membrane, so that the effect/result of directional arrangement of the carbon nano tube is realized.
3. A transfer method of self-assembled carbon nano tube array for terahertz comprises the following steps:
the transfer method comprises the following steps:
removing the filter membrane and the self-assembled carbon nanotube array on the filter membrane, and parallelly and reversely covering the self-assembled carbon nanotube array attached to the filter membrane on the target flexible substrate downwards, so that the self-assembled carbon nanotube array directly contacts the surface of the target flexible substrate; then, dropwise adding a solvent from the upper part of the filter membrane to the lower part, applying uniform pressure to the filter membrane and downwards for 2-10N by using a tool, changing the energy release rate, tearing off the filter membrane after applying the pressure for 5-20 s, and transferring the self-assembled carbon nano tube array onto a target flexible substrate to realize transfer, wherein the process can be realized through mechanical automation.
The invention realizes the conversion from the filter membrane to the target flexible substrate after the self-assembled carbon nano tube array is subjected to water-pressing printing for the first time, and realizes the effects/advantages of green, environment protection and rapid transfer.
The solvent is pure water, ethanol or other water solvents.
The target flexible substrate comprises polydimethylsiloxane, polyimide, polyvinyl chloride and polyethylene terephthalate dielectric materials.
4. The method for measuring and orienting the self-assembled carbon nano tube array for terahertz comprises the following steps:
for the horizontally arranged directional arranged carbon nanotubes, the orientation direction of the directional arranged carbon nanotubes is consistent with the direction of the connecting line between a pair of gold electrodes, namely, the orientation direction of the directional arranged carbon nanotubes is consistent with the direction of the nanoscale grooves on the filter membrane, and in the implementation, the directions of the grooves are observed and marked through a microscope. The direction of the connecting line between a pair of gold electrodes or the direction of the nano-scale groove on the filter membrane is used as the orientation direction of the oriented carbon nano-tubes.
The carbon nanotubes in the self-assembled carbon nanotube array are one or a combination of two of single-wall carbon nanotubes and multi-wall carbon nanotubes.
The thickness of the self-assembled carbon nanotube array is as low as 150nm and as high as 2 μm.
And after the carbon nano tube is transferred to a target substrate, the carbon nano tube is further processed into a terahertz functional device.
The innovative scheme of the invention comprises a self-assembled carbon nano tube array preparation method, a self-assembled carbon nano tube array transfer method and a self-assembled carbon nano tube array orientation determination method.
The method prepares the high-density carbon nanotube array on the filter membrane by a vacuum suction filtration device, can realize the preparation of the directional arrangement (horizontal) carbon nanotube film by combining the assistance of the gold electrode, and the on direction of the gold electrode is the arrangement direction of the carbon nanotubes.
The method can prepare the carbon nanotube array (directional/non-directional arrangement) with the nano-scale thickness, realizes the rapid transfer of the carbon nanotube array in a simple and environment-friendly mode, and simultaneously determines the orientation of the directional arrangement carbon nanotubes by a rapid and nondestructive method, thereby having higher application value in the field of preparation of terahertz devices based on the carbon nanotubes.
The invention has the advantages and beneficial effects that:
1. the invention realizes the self-assembly of the carbon nano tube array in a vacuum filtration mode, and simultaneously realizes the self-assembly of the directional arranged carbon nano tube by the assistance of the gold electrode.
2. The invention can obtain the orientation arrangement direction of the carbon nano tubes through the gold electrode conduction direction, and is a fast, simple and lossless way for obtaining the orientation degree.
3. The invention can realize the transfer from the self-assembled carbon nanotube to the target flexible substrate by increasing the energy release rate between the carbon nanotube and the target substrate in a simple water adding pressing mode, overcomes the problems of unfriendly environment, poor film uniformity, long operation time and incompatibility with the high polymer flexible substrate of the self-assembled carbon nanotube transferred by a chemical wet method, and avoids the harm of hazardous reagents (chloroform) to human bodies.
4. The invention can realize the self-assembly of the nano-scale carbon nano-tube array, the thickness can be as low as 150nm, and the technical bottleneck that the direct growth of the carbon nano-tube can only transfer the micro-scale array is broken through.
5. The uniformity of the self-assembled carbon nano tube transferred by the invention is higher than that of the self-assembled carbon nano tube transferred by a wet etching method, and the transferred film is complete and has no holes.
6. The carbon nano tube array transferred to the target substrate can be used for preparing a terahertz function device.
Drawings
FIG. 1 is a schematic diagram of self-assembly of non-aligned carbon nanotubes;
FIG. 2 is a schematic diagram of self-assembly of aligned (horizontal) carbon nanotubes;
FIG. 3 is an optical photograph of a self-assembled carbon nanotube film;
FIG. 4 is a diagram of a filter membrane groove scanning electron microscope;
FIG. 5 is a photograph of a self-assembled carbon nanotube film scanning electron microscope, including (a) non-aligned carbon nanotubes and (b) aligned carbon nanotubes (horizontally aligned);
FIG. 6 is a flow chart of the transfer of self-assembled carbon nanotubes to a flexible substrate with water pressing;
FIG. 7 is an optical photograph of self-assembled carbon nanotubes after transfer to a polydimethylsiloxane flexible substrate;
FIG. 8 is an optical photograph of self-assembled carbon nanotubes after transfer to a polyvinyl chloride flexible substrate;
FIG. 9 is a schematic representation of a terahertz absorber with a structure of carbon nanotube-polydimethylsiloxane-gold
In the figure: glass bottle (1), pipe (2), vacuum pump (3), vacuum bottle (4), rubber buffer (5), connecting pipe fitting (6), filter membrane (7), carbon nanotube solution (8), gold electrode (9), gold electrode (15), wire (16), adjustable power (17), wire (18).
Detailed Description
In the specific implementation process, the self-assembled carbon nano tube array preparation, transfer and orientation measurement method utilizes vacuum suction filtration to prepare the self-assembled carbon nano tube array, and simultaneously utilizes gold electrodes to assist in realizing the oriented arrangement of the carbon nano tubes. The on direction of the gold electrode and the groove direction of the filter membrane are the arrangement direction of the carbon nano tubes. And (3) covering the self-assembled carbon nano tube array attached to the filter membrane on a target flexible substrate in parallel downwards, dripping a solvent from the upper part, and manually or using a tool to tear off the filter membrane after applying uniform pressure, so that the self-assembled carbon nano tube array is transferred to the flexible substrate.
The invention is further described below by way of examples and figures.
Example 1
As shown in fig. 1, the device comprises a glass bottle 1, a conduit 2, a vacuum pump 3, a vacuum bottle 4, a rubber plug 5, a connecting pipe fitting 6, a filter membrane 7 and a carbon nano tube solution 8; the glass bottle 1 is arranged above the vacuum bottle 4, the bottom of the glass bottle 1 is provided with an opening, the opening is communicated to the inside of the vacuum bottle 4 through a connecting pipe fitting 6, a filter element is arranged at the joint of the connecting pipe fitting 6 and the bottom opening of the glass bottle 1, a filter membrane 7 is covered on the filter element, and the vacuum bottle 4 is communicated with the vacuum pump 3; the pipe of the connecting pipe fitting 6 is filled with a rubber plug 5.
The connecting pipe fitting 6 comprises a tray body positioned at the upper part and a pipe body positioned at the lower part, wherein the tray body is embedded in an opening at the bottom end of the glass bottle 1, the surface of the tray body is provided with a filter element and a filter membrane 7 in a stacking way from bottom to top, the upper end of the pipe body is concentrically connected into a central through hole of the tray body, and the lower end of the pipe body extends into the vacuum bottle 4.
The filter membrane is a polycarbonate membrane with the aperture of 200nm, and the filter membrane 7 soaked by deionized water is covered on the connecting pipe fitting 6; adding 6mL of prepared carbon nanotube solution with the concentration of 421ug/mL into a glass bottle 1, then opening a vacuum pump 3, wherein the pressure in the vacuum bottle 4 is smaller than the pressure in the glass bottle 1, so that substances in the glass bottle 1 are extracted into the vacuum bottle 4, non-carbon nanotube substances in the carbon nanotube solution of the glass bottle 1 flow into the vacuum bottle 4, the carbon nanotube array is gradually deposited on a polycarbonate filter membrane 7, suction filtration is stopped 1 hour after no liquid flows into the vacuum bottle 4, self-assembled on the filter membrane 7 to prepare a self-assembled carbon nanotube array of non-oriented carbon nanotubes, the self-assembled carbon nanotube array is in a film shape as shown in fig. 3, the thickness is 2021nm, and a scanning electron microscope result is shown in fig. 5 (a).
Example 2
As shown in fig. 2, the device comprises a glass bottle 1, a vacuum pump 3, a vacuum bottle 4, a rubber plug 5, a connecting pipe fitting 6 and a filter membrane 7; the glass bottle 1 is arranged above the vacuum bottle 4, the bottom of the glass bottle 1 is provided with an opening, the opening is communicated to the inside of the vacuum bottle 4 through a connecting pipe fitting 6, a filter element is arranged at the joint of the connecting pipe fitting 6 and the bottom opening of the glass bottle 1, a filter membrane 7 is covered on the filter element, and the vacuum bottle 4 is communicated with the vacuum pump 3; the pipe of the connecting pipe fitting 6 is filled with a rubber plug 5.
The connecting pipe fitting 6 comprises a tray body positioned at the upper part and a pipe body positioned at the lower part, wherein the tray body is embedded in an opening at the bottom end of the glass bottle 1, the surface of the tray body is provided with a filter element and a filter membrane 7 in a stacking way from bottom to top, the upper end of the pipe body is concentrically connected into a central through hole of the tray body, and the lower end of the pipe body extends into the vacuum bottle 4.
The filter membrane 7 is provided with a pair of gold electrodes 9 and 15 at intervals, the pair of gold electrodes 9 and 15 are respectively connected to two ends of the adjustable power supply 17 after being respectively connected with leads 16 and 18, and the connecting line direction of the pair of gold electrodes 9 and 15 is parallel to the nano-scale groove direction in the filter membrane 7.
The filter membrane is a polycarbonate membrane with the aperture of 200nm, the filter membrane 7 soaked by deionized water is covered on the connecting pipe fitting 6, a pair of gold electrodes 9 and 15 are parallelly fixed on the filter membrane 7, the connecting line direction between the pair of gold electrodes 9 and 15 is parallel to the nano-scale groove direction on the filter membrane 7, and the groove direction is observed and marked by a microscope, as shown in a filter membrane groove scanning electron microscope chart in fig. 4. A pair of gold electrodes 9, 15 are electrically connected to both ends of an adjustable power supply 17 by wires 16, 18;
preparing 20mL of carbon nanotube solution with the concentration of 10ug/mL, adding the carbon nanotube solution into the glass bottle 1, opening an adjustable power supply 17 and setting voltage to enable the directional carbon nanotube array to gradually deposit and grow on the filter membrane 7, when the volume of the solution in the glass bottle 1 is still 1mL, opening the vacuum pump 11 again, wherein the pressure in the vacuum bottle 4 is smaller than the pressure in the glass bottle 1 to enable substances in the glass bottle 1 to be extracted into the vacuum bottle 4, non-carbon nanotube substances in the carbon nanotube solution in the glass bottle 1 flow into the vacuum bottle 4, the carbon nanotube array continues to gradually deposit on the filter membrane 7, stopping suction filtration 1 hour after no liquid flows into the vacuum bottle 4, self-assembling on the filter membrane 7 to prepare the self-assembled carbon nanotube array of the directional carbon nanotubes which are horizontally arranged, wherein the self-assembled carbon nanotube array is shown in the graph of fig. 3, the thickness is 146nm, and the scanning electron microscope result is shown in the graph of fig. 5 (b).
Example 3
As shown in fig. 6, the obtained self-assembled carbon nanotube array was covered on a polydimethylsiloxane flexible substrate in parallel with the downward direction, a polycarbonate filter film adhered to the self-assembled carbon nanotube array was faced upward, 10uL of ultrapure water was added dropwise, and a force of 5N was applied uniformly to the surface of the self-assembled carbon nanotube array vertically, and after 10s, the polycarbonate filter film was peeled off along one side of the film with tweezers, thereby realizing the transfer of self-assembled carbon nanotubes from the polycarbonate film to the polydimethylsiloxane flexible substrate.
The results of the 2cm x 2cm self-assembled carbon nanotubes transferred to the polydimethylsiloxane flexible substrate are shown in FIG. 7, and the transferred film was uniform and complete.
A flexible terahertz absorber was prepared by sputtering a 200nm gold layer on the side of the polydimethylsiloxane not contacting the carbon nanotube array, as shown in fig. 9.
Example 4
The self-assembled carbon nano tube prepared by the method in the embodiment 3 is covered on the polyvinyl chloride flexible glue surface in a parallel and downward manner, a polycarbonate filter film adhered to the self-assembled carbon nano tube is upwards, 10uL of ultrapure water is dripped, 2N force is applied to the vertical carbon nano tube, and after 2s, the polycarbonate filter film is uncovered along one side of the film by using tweezers, so that the self-assembled carbon nano is transferred from the polycarbonate film to the polyvinyl chloride flexible substrate.
The results of 1cm×1.2cm self-assembled carbon nanotubes transferred to polyvinyl chloride flexible substrates are shown in fig. 8, and the transferred films are uniform and complete.
The invention can realize the transfer of the self-assembled carbon nanotube to the target flexible substrate by increasing the energy release rate between the carbon nanotube and the target substrate in a simple water adding pressing mode, overcomes the problems of unfriendly environment, poor film uniformity, long operation time and incompatibility with the high polymer flexible substrate in the chemical wet transfer of the self-assembled carbon nanotube, can realize the nano-scale self-assembled carbon nanotube array, has the thickness as low as 150nm, breaks through the technical bottleneck that the direct growth carbon nanotube can only transfer the micro-scale carbon nanotube array, can obtain the self-assembled carbon nanotube with the uniformity higher than that transferred by the wet etching method, and has complete and no hollow transferred film.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the invention, but any minor modifications, equivalents, and improvements made to the above embodiments according to the technical principles of the present invention should be included in the scope of the technical solutions of the present invention.
Claims (8)
1. A self-assembled carbon nanotube array preparation device for terahertz is characterized in that,
the device comprises a glass bottle (1), a vacuum pump (3), a vacuum bottle (4), a rubber plug (5), a connecting pipe fitting (6), a filter membrane (7) and a catheter (2); the glass bottle (1) is arranged above the vacuum bottle (4), the bottom of the glass bottle (1) is provided with an opening, the opening is communicated to the inside of the vacuum bottle (4) through a connecting pipe fitting (6), a filter element is arranged at the joint of the connecting pipe fitting (6) and the bottom opening of the glass bottle (1), a filter membrane (7) is covered on the filter element, a carbon nano tube solution (8) is covered on the filter membrane, and the vacuum bottle (4) is communicated with the vacuum pump (3) through a guide pipe (2); the pipeline of the connecting pipe fitting (6) is connected with the vacuum bottle (4) through a rubber plug (5);
the filter membrane (7) is provided with a pair of gold electrodes (9, 15) at intervals, the pair of gold electrodes (9, 15) are respectively connected to two ends of the adjustable power supply (17) after being connected with wires (16, 18);
the filter membrane (7) is provided with a nanoscale groove.
2. The device for preparing a terahertz self-assembled carbon nanotube array according to claim 1, wherein: the output voltage of the adjustable power supply (17) is adjustable.
3. The device for preparing a terahertz self-assembled carbon nanotube array according to claim 1, wherein: the connecting line direction of the pair of gold electrodes (9, 15) is parallel to the nano-scale groove direction in the filter membrane (7).
4. The device for preparing a terahertz self-assembled carbon nanotube array according to claim 1, wherein: the connecting pipe fitting (6) comprises a tray body positioned at the upper part and a pipe body positioned at the lower part, wherein the tray body is embedded in an opening at the bottom end of the glass bottle (1), the surface of the tray body is provided with a filter element and a filter membrane (7) in a stacking way from bottom to top, the upper end of the pipe body is concentrically connected into a central through hole of the tray body, and the lower end of the pipe body extends into the vacuum bottle (4).
5. The method for preparing the self-assembled carbon nano tube array for terahertz applied to the device of claim 1, which is characterized by comprising the following steps: for the horizontally arranged directional carbon nanotubes, the device of claim 2 is adopted, a filter membrane (7) soaked by deionized water is covered on a connecting pipe fitting (6), a pair of gold electrodes (9, 15) are fixed on the filter membrane (7), the connecting line direction between the pair of gold electrodes (9, 15) is parallel to the nano-scale groove direction on the filter membrane (7), and the pair of gold electrodes (9, 15) are electrically connected with two ends of an adjustable power supply (17) by leads (16, 18); adding a carbon nano tube solution into a glass bottle (1), opening an adjustable power supply (17) and setting voltage to enable the carbon nano tube array to be deposited on a filter membrane (7) gradually in an oriented arrangement mode, when the volume of the solution in the glass bottle (1) is 10-20% of the added volume, opening a vacuum pump (11), enabling non-carbon nano tube substances in the carbon nano tube solution in the glass bottle (1) to flow into a vacuum bottle (4), enabling the carbon nano tube array to continue to be deposited on the filter membrane (7) gradually, stopping suction filtration for a period of time after no liquid flows into the vacuum bottle (4), and obtaining the self-assembled carbon nano tube array on the filter membrane (7).
6. The transfer method of the self-assembled carbon nano tube array for terahertz is characterized by comprising the following steps of: the self-assembled carbon nano tube array attached to the filter membrane is covered on the target flexible substrate in a parallel and upside down mode, so that the self-assembled carbon nano tube array is in direct contact with the surface of the target flexible substrate; and then dropwise adding a solvent from the upper part of the filter membrane to the lower part of the filter membrane, applying uniform pressure to the filter membrane for 2-10N, and tearing off the filter membrane after applying the pressure for 5-20 s, so as to transfer the self-assembled carbon nano tube array onto a target flexible substrate to realize transfer.
7. The method for transferring a terahertz self-assembled carbon nanotube array according to claim 6, wherein the target flexible substrate comprises polydimethylsiloxane, polyimide, polyvinyl chloride, and polyethylene terephthalate dielectric materials.
8. The method for measuring orientation of the self-assembled carbon nanotube array for terahertz prepared by the preparation method of claim 5 is characterized in that for the horizontally arranged and oriented carbon nanotubes, the direction of a connecting line between a pair of gold electrodes or the direction of a nanoscale groove on the filter membrane is used as the orientation direction of the oriented carbon nanotubes.
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| CN106219516B (en) * | 2016-07-28 | 2018-12-25 | 电子科技大学 | A kind of method that solution left standstill method prepares oriented alignment single-walled carbon nanotube |
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