阅读说明：本技术 碳纳米管复合体及其制造方法
(Carbon nanotube composite and method for producing same
) 是由 井上铁也 于 2018-05-08 设计创作，主要内容包括：本发明涉及一种碳纳米管复合体及其制造方法,可反复地维持高摩擦状态。碳纳米管复合体(1)具备：被覆有非晶碳的垂直取向性碳纳米管(40)、以及固定所述垂直取向性碳纳米管(40)的基体层(10)。垂直取向性碳纳米管(40)的取向方向上的端部(20a)从基体层(10)露出。(The present invention relates to a carbon nanotube composite capable of repeatedly maintaining a high friction state, and a method for manufacturing the same. A carbon nanotube composite (1) is provided with: the carbon nanotube-based substrate comprises vertically aligned carbon nanotubes (40) coated with amorphous carbon, and a substrate layer (10) for fixing the vertically aligned carbon nanotubes (40). The end (20a) of the vertically aligned carbon nanotube (40) in the direction of alignment is exposed from the base layer (10).)
1. A carbon nanotube composite comprising:
a vertically aligned carbon nanotube coated with amorphous carbon; and
a substrate layer that fixes the vertically aligned carbon nanotubes,
at least one end of the vertically aligned carbon nanotubes in the alignment direction is exposed from the base layer.
2. The carbon nanotube composite according to claim 1,
the base layer is formed by laminating at least two layers formed of different materials from each other in the orientation direction.
3. The carbon nanotube composite according to claim 2,
the vertically aligned carbon nanotubes are present inside the at least two layers.
4. The carbon nanotube composite according to any one of claims 1 to 3,
the base layer is provided with a layer comprising an elastic material.
5. A method for producing a carbon nanotube composite, comprising:
a carbon nanotube production step of producing vertically aligned carbon nanotubes on a substrate and coating the vertically aligned carbon nanotubes with amorphous carbon; and
and a fixing step of fixing the vertically aligned carbon nanotubes on the base layer.
Technical Field
The present invention relates to a carbon nanotube composite and a method for producing the same.
Background
As a conventional technique, an adhesive member using a carbon nanotube is known.
For example, patent document 1 discloses an adhesive member in which a carbon nanotube assembly is fixed to a base material. In the adhesive member disclosed in patent document 1, when another object is placed on the adhesive member, van der waals force acts between the carbon nanotubes and the other object, and the other object is adhered to the adhesive member.
Disclosure of Invention
Technical problem to be solved
However, in the adhesive member disclosed in patent document 1, when another object is placed, the carbon nanotubes are bent, and adjacent carbon nanotubes are aggregated. Therefore, the adhesive member disclosed in patent document 1 has a problem that another object cannot be repeatedly adhered.
An object of one embodiment of the present invention is to provide a carbon nanotube composite that can repeatedly maintain a high friction state.
(II) technical scheme
In order to solve the above-described problems, a carbon nanotube composite according to an embodiment of the present invention includes: the carbon nanotube-based display device includes vertically aligned carbon nanotubes coated with amorphous carbon, and a base layer for fixing the vertically aligned carbon nanotubes, wherein at least one end of the vertically aligned carbon nanotubes in an alignment direction is exposed from the base layer.
(III) advantageous effects
According to one embodiment of the present invention, a carbon nanotube composite can be realized that can repeatedly maintain a high friction state.
Drawings
Fig. 1 shows a structure of a carbon nanotube composite according to embodiment 1 of the present invention, in which (a) is a plan view of the carbon nanotube composite and (b) is a cross-sectional view in the direction of an arrow on the a-a line in (a).
Fig. 2 is an enlarged view of one end of the carbon nanotube included in the carbon nanotube composite.
Fig. 3 shows a state where another object is placed on the carbon nanotube composite, where (a) is a plan view of the carbon nanotube composite and (b) is a cross-sectional view in the direction of the arrow a-a in (a).
Fig. 4 (a) to (f) are schematic views for explaining the method for producing the carbon nanotube composite.
Fig. 5 is a view showing another example of the shape of a region where carbon nanotubes are exposed from the carbon nanotube composite.
Fig. 6 is a cross-sectional view showing the structure of a carbon nanotube composite as a modification of the carbon nanotube composite of embodiment 1.
Fig. 7 (a) to (d) are schematic views for explaining the method for producing the carbon nanotube composite.
Fig. 8 shows a structure of a carbon nanotube composite according to embodiment 2 of the present invention, in which (a) is a plan view of the carbon nanotube composite and (b) is a cross-sectional view in the direction of the arrow a-a in (a).
Fig. 9 (a) to (f) are schematic views for explaining the method for producing the carbon nanotube composite.
Detailed Description
[ embodiment mode 1 ]
A carbon nanotube composite 1 according to embodiment 1 of the present invention will be described with reference to the drawings. Hereinafter, the carbon nanotube is abbreviated as "CNT", and the carbon nanotube composite is abbreviated as "CNT composite". In the present specification, "a to B" mean "a to B inclusive".
(Structure of carbon nanotube Complex 1)
The structure of the CNT composite 1 will be described with reference to fig. 1 and 2.
Fig. 1 shows a structure of the CNT composite 1, in which (a) is a plan view of the CNT composite 1 and (b) is a cross-sectional view in the direction of the line a-a in (a).
As shown in fig. 1 (a) and (b), the CNT composite 1 includes a substrate layer 10 and vertically aligned carbon nanotubes 40.
The base layer 10 is formed of an elastic material (e.g., rubber) which is a polymer material, and has a substantially rectangular parallelepiped shape. For example, the base layer 10 may be formed of natural rubber, urethane rubber, silicone rubber, fluororubber, or the like. As shown in fig. 1, the base layer 10 includes a first surface 10a and a second surface 10b facing the first surface 10 a.
The vertically aligned CNT40 is composed of a plurality of CNTs 20 aligned in a certain direction. In other words, the vertically aligned CNTs 40 are also referred to as a CNT group. Fig. 2 is an enlarged view of one end of CNT 20. As shown in fig. 2, CNTs 20 are coated with an amorphous layer 22 on a tube layer 21.
The tube layer 21 has an outer diameter (L1 shown in FIG. 2) of 10 to 12nm and a length of 50 to 200 μm, and the tube layer 21 is composed of 5 to 10 layers. The tube layer 21 may be a normal CNT not covered with the amorphous layer 22 described later.
Amorphous layer 22 is composed of amorphous carbon. As shown in fig. 2, the amorphous layer 22 is coated on the radially outer surface of the tube layer 21. The thickness of the amorphous layer 22 (L2 shown in FIG. 2) is 5 to 10 nm. Preferably, amorphous layer 22 does not overlap amorphous layer 22 that is coated on adjacent CNTs 20.
As shown in fig. 1, the CNTs 20 (i.e., the vertically aligned carbon nanotubes 40) of the CNT composite 1 are aligned in a direction from the first surface 10a toward the second surface 10b and fixed (impregnated) to the base layer 10 (in other words, the CNTs 20 are aligned in a predetermined direction and embedded). That is, the direction from the first surface 10a toward the second surface 10b is the same as the orientation direction of the CNTs 20. One end (one end) 20a of the CNTs 20 in the alignment direction is exposed from the first surface 10a of the base layer 10. In other words, at least one end of the vertically aligned CNTs 40 in the alignment direction is exposed from the first surface 10a of the base layer 10. In the CNT composite 1, the end portion 20a protrudes outward from the first surface 10a of the base layer 10 by 1 μm to 50 μm. The plurality of CNTs 20 are preferably 1cm per cross section perpendicular to the alignment direction2Is formed with 109～1010And (4) root. In CNT composite 1 of the present embodiment, as shown in fig. 1 (a), region D where CNTs 20 are exposed on the surface including first surface 10a has a rectangular shape.
(example of Using carbon nanotube Complex 1)
Next, an example of use of the CNT composite 1 will be described with reference to fig. 3. Fig. 3 shows a state where another object 30 is placed on the CNT composite 1, where (a) is a plan view of the CNT composite 1, and (b) is a cross-sectional view in the direction of the arrow a-a in (a).
As shown in fig. 3 (a) and (b), when another object 30 is placed on the CNT composite 1 at a position where the CNTs 20 are exposed, the end 20a of the CNT20 comes into contact with the surface of the other object 30. At this time, the outer diameter of the CNT20 is very small, being several tens of nm, and thus the end portion 20a sinks (penetrates) into the surface of another object 30. As a result, a very high frictional force (clamping force) is generated between the CNT composite 1 and another object 30 (when the coefficient of static friction with the copper plate is actually measured, the coefficient of static friction is 0.7 to 0.8).
Here, as described above, the CNT20 of the present embodiment is coated with the amorphous layer 22 on the tube layer 21. Thereby, it is possible to suppress the aggregation of the CNTs 20 adjacent to each other due to van der waals force when the CNTs 20 are deflected by the pressure applied by the other object 30 in the alignment direction. As a result, when the pressure is released, the CNTs 20 can return to their original aligned state. As a result, the CNT composite 1 can repeatedly maintain a high-friction state.
In addition, since the CNT20 is coated with the amorphous layer 22 on the tube layer 21, the strength and elasticity are higher than those of CNTs that are not coated with the amorphous layer 22. As a result, the CNTs 20 are less likely to bend when pressure is applied in the alignment direction by another object 30, and the CNTs 20 can return to their original alignment state when the pressure is released.
Further, since the CNTs 20 are aligned, the region D where the CNTs 20 are exposed on the surface including the first surface 10a has high water repellency. As a result, the CNT composite 1 does not have a low pinching force even when the other object 30 is wetted with water, and a high frictional force (pinching force) can be generated between the end 20a of the CNT20 and the other object 30.
Further, since the CNTs 20 are fixed to the base layer 10, the wear resistance of the base layer 10 can be improved.
Since the base layer 10 is made of an elastic material, the CNT composite body 1 of the present embodiment can be used for, for example, soles of shoes (e.g., sports shoes) and a rubber surface of a table tennis racket.
The shoe to which the CNT composite 1 of the present embodiment is applied can generate a large frictional force between the shoe and the ground, and thus can reliably transmit force to the ground. Further, since CNT20 is waterproof as described above, it does not slip even when the floor surface is wet, and can obtain a large grip property with respect to the floor surface.
The table tennis bat to which the CNT composite 1 of the present embodiment is applied can generate a large frictional force between the bat and the table tennis ball. As a result, the ball given a strong spin can be hit, and the ball given a strong spin from the opponent can be easily hit back.
In addition, although the CNT composite of the present embodiment is configured such that the end portion 20a protrudes outward from the first surface 10a of the base layer 10, the CNT composite of the present invention is not limited thereto. That is, the CNT composite of the present invention may be configured such that at least one end 20a in the orientation direction of the CNTs 20 is exposed from the first surface 10a of the base layer 10, and in the CNT composite of an embodiment of the present invention, a surface formed by the one end 20a in the orientation direction of the CNTs 20 may be formed on the same surface as the first surface 10a of the base layer 10. In this case, since the end 20a of the CNT20 can be brought into contact with the surface of another object 30, a very high frictional force can be generated between the CNT composite 1 and the other object 30.
In addition, although the base layer 10 is formed of an elastic material in this embodiment, the base layer of the present invention is not limited thereto. In the CNT composite according to one embodiment of the present invention, the base layer 10 may be made of a polymer material other than an elastic material. For example, the base layer 10 may be made of resin (thermoplastic resin, thermosetting resin), or metal. In addition, the CNT composite 1 can also be used as a reusable adhesive member.
(method for producing carbon nanotube Complex 1)
Next, a method for producing the CNT composite 1 according to the present embodiment will be described with reference to fig. 4.
Fig. 4 (a) to (f) are schematic diagrams illustrating a method for producing the CNT composite 1.
The method for producing the CNT composite 1 of the present embodiment includes: a carbon nanotube production step (CNT production step), a polymer material coating step, and a transfer step.
As shown in fig. 4 (a), the CNT production step is a step of producing a plurality of CNTs 20 on a substrate B1, and the CNTs 20 are coated with amorphous carbon and aligned in a certain direction (a direction perpendicular to the substrate B1).
The substrate B1 is a thin steel plate (e.g., a stainless steel plate having a thickness of about 20 μm to several mm). After the substrate B1 is cleaned (for example, alkali cleaned), a passivation film of silica, alumina or the like is coated on the upper surface, and catalyst particles of metal are coated on the upper surface of the passivation film. The metal of the catalyst particles is, for example, iron (Fe), cobalt (Co) or nickel (Ni).
In the CNT manufacturing process, first, the substrate B1 is introduced into a heating chamber maintained at a predetermined vacuum degree (for example, 3kPa to 50kPa, preferably 3kPa to 10kPa), and the temperature of the substrate B1 is raised to a first temperature (for example, 640 ℃ to 720 ℃) in a mixed gas atmosphere (for example, a mixed gas of nitrogen and hydrogen).
Next, a raw material gas (for example, a lower hydrocarbon gas such as acetylene, methane, or butane) is supplied onto the upper surface of the substrate B1. Thereby, a tubular carbon layer (i.e., CNT, tube layer 21) was grown to a desired height (length) on the catalyst particles on the upper surface of the substrate B1.
Next, the temperature of the substrate K is raised to a second temperature (for example, 780 to 840 ℃) higher than the first temperature in the mixed gas atmosphere.
Next, the raw material gas is supplied again to the CNTs formed on the substrate B1. This allows a predetermined amount of amorphous carbon (i.e., amorphous layer 22) to be formed on the outer surface of tube layer 21. Then, the substrate B1 was slowly cooled while supplying the mixed gas to the substrate B1, thereby producing a plurality of CNTs 20 (i.e., vertically aligned carbon nanotubes 40) on the substrate B1, in which the tube layer 21 was coated with amorphous carbon (amorphous layer 22) and the CNTs were aligned in a certain direction (direction perpendicular to the substrate B1).
As shown in fig. 4 (B), the polymer material coating step is a step of coating a precursor solution P1 of an elastic material (i.e., the base layer 10) on the substrate B2.
The transfer step (fixing step) is a step of transferring the CNTs 20 (i.e., the vertically aligned carbon nanotubes 40) produced on the substrate B1 to the base layer 10 (i.e., the precursor solution P1 of the elastic material) applied to the substrate B2. Specifically, in the transfer step, first, as shown in fig. 4 (c), the CNTs 20 formed on the substrate B1 are pushed (inserted) into the precursor solution P1 of the elastic material coated on the substrate B2 along the direction of the arrow shown in fig. 4 (c). As a result, as shown in fig. 4 (d), CNTs 20 were inserted into the precursor solution P1 of the elastic material. Next, the precursor solution P1 of the elastic material is heated (or dried), thereby curing the precursor solution P1. Thereby forming a matrix layer 10, and fixing the plurality of CNTs 20 to the matrix layer 10.
Next, the substrate B1 is separated from the CNTs 20 by using, for example, a cutter or the like, and as shown in fig. 4 (e), the substrate B1 is peeled from the CNTs 20 upward in fig. 4 (e). Similarly, the substrate B2 is separated from the base layer 10 by a cutter or the like, and the substrate B2 is peeled from the base layer 10 downward in fig. 4 (e). Thereby transferring the plurality of CNTs 20 to the matrix layer 10.
In this way, as shown in fig. 4 (f), the CNT composite 1 in which the end portions 20a of the CNTs 20 are exposed from the first surface 10a of the base layer 10 can be manufactured.
In addition, although the CNT composite 1 of the present embodiment is configured such that the region D where the CNTs 20 are exposed on the surface including the first surface 10a has a rectangular shape, the CNT composite of the present invention is not limited to this. In the CNT composite according to one embodiment of the present invention, the shape of the region where the CNTs 20 are exposed on the surface including the first surface 10a can be arbitrarily changed depending on the purpose of use of the CNT composite by controlling the shape of the aggregate of the CNTs 20 formed in the CNT manufacturing step. In the CNT composite according to one embodiment of the present invention, a plurality of portions may be provided with regions where CNTs 20 are exposed on the surface including first surface 10 a.
In the CNT production process, the shape of the region formed by the end portions 20a of the plurality of CNTs 20 produced on the substrate B1 (i.e., the vertically aligned CNTs 40) can be changed by controlling the region of the catalyst particles coated on the substrate B1. This allows the shape of the region where CNTs 20 are exposed on the surface including first surface 10a to be appropriately changed. Fig. 5 is a diagram showing another example of the shape of the region where CNTs 20 are exposed on the surface including first surface 10 a. In the CNT manufacturing process, the catalyst particles coated on the substrate B1 are arranged in a ring shape (circular shape) or a polygonal shape, so that the region where the CNTs 20 are exposed on the surface including the first surface 10a can be formed in a ring shape (region D1 shown in fig. 5) or a polygonal shape (region D2 shown in fig. 5) as shown in fig. 5. Further, as shown in fig. 5, the vertical alignment CNTs 40 can be designed to be exposed in a plurality of regions.
< modification 1 >
Next, a CNT composite 1A, which is a modification of the CNT composite 1 according to embodiment 1, will be described with reference to the drawings. For convenience of explanation, members having the same functions as those described in embodiment 1 are given the same reference numerals, and explanations thereof are omitted.
Fig. 6 is a sectional view showing the structure of the CNT composite 1A. As shown in fig. 6, in the CNT composite 1A, an end 20b opposite to the one end 20a in the alignment direction of the plurality of CNTs 20 (i.e., the vertically aligned carbon nanotubes 40) is exposed from the second surface 10b of the base layer 10. The surface formed by the end portion 20b is the same surface as the second surface 10b of the base layer 10. Thus, in the CNT composite 1A, the portions where the CNTs 20 are exposed can be brought into a high-friction state on the two opposing surfaces (i.e., the surface including the first surface 10a and the surface including the second surface 10 b).
Next, a method for producing the CNT composite 1A according to the present embodiment will be described with reference to fig. 7. Fig. 7 (a) to (d) are schematic diagrams illustrating a method for producing the CNT composite 1.
The method for producing the CNT composite 1 of the present embodiment includes: a CNT production step, a polymer material filling step, a polymer material curing step, and a peeling step. The CNT production process is the same as that described in embodiment 1, and therefore, the description thereof is omitted.
As shown in fig. 7 (a) and (B), the polymer material filling step is a step of filling a precursor solution P1 of an elastic material between a plurality of CNTs 20 by flowing a precursor solution P1 of the elastic material dissolved in an organic solvent (e.g., acetone) into the plurality of CNTs 20 fabricated on the substrate B1. The precursor solution P1 of the elastic material is filled so that the end 20a protrudes from the precursor solution P1 to the outside by 1nm to 50 nm. In addition, it is preferable that a negative pressure is formed in the filling step for the polymer material. This makes it possible to easily flow the precursor solution P1 of the elastic material into the CNTs 20.
The polymer material curing step (fixing step) is a step of heating (or drying) the precursor solution P1 of the elastic material filled between the CNTs 20 in the polymer material filling step to cure the precursor solution P1. Through the polymer material curing step, the base layer 10 is formed as shown in fig. 7 (c), and the CNTs 20 (i.e., vertically aligned CNTs 40) are fixed to the base layer 10.
The peeling step is a step of separating the substrate B1 from the CNT20 using, for example, a cutter or the like, and peeling the substrate B1 from the CNT20 downward in fig. 7 (c).
As shown in fig. 7 (d), the CNT composite 1A in which one end 20a of the CNTs 20 is exposed from the first surface 10a of the base layer 10 and the other end 20b of the CNTs 20 is exposed from the second surface 10b of the base layer 10 can be manufactured in this manner.
[ embodiment 2 ]
Another embodiment of the present invention will be described below with reference to the drawings. For convenience of explanation, members having the same functions as those described in the foregoing embodiment are given the same reference numerals, and explanation thereof is omitted.
(Structure of carbon nanotube Complex 1B)
The structure of the CNT composite 1B according to the present embodiment will be described with reference to fig. 8. Fig. 8 shows the structure of the CNT composite 1B, where (a) is a plan view of the CNT composite 1B and (B) is a cross-sectional view in the direction of the line a-a in (a). As shown in fig. 8, the CNT composite 1B includes a base layer 10A and CNTs 20.
The base layer 10A includes a first layer 11 and a second layer 12.
The first layer 11 is formed of an elastic material (e.g., rubber) which is a polymer material. The first layer 11 includes a first surface 11a and a second surface 11b facing the first surface 11 a. The first face 11a and the second face 11b are stacked in the orientation direction of the CNTs 20.
The second layer 12 is formed of a resin as a polymer material. The second layer 12 includes a first surface 12a and a second surface 12b facing each other. The first surface 12a abuts against the second surface 12b of the first layer 11.
In the CNT composite 1B, one end portion 20a of the CNT20 is exposed from the first surface 11a of the first layer 11, and the other end portion 20B of the CNT20 is present inside the second layer 12.
As described above, the base layer 10A of the present embodiment includes: a first layer 11 formed of an elastic material, and a second layer 12 formed of a resin. Thus, the CNT composite 1A has elasticity on one side and high strength on the other side. That is, CNT composite 1B has a plurality of functions.
In CNT composite 1B, a plurality of CNTs 20 are located inside first layer 11 and second layer 12. Thereby, the joining of the CNTs 20 to the first layer 11 and the second layer 12 can be made firm (in other words, the CNTs 20 have an anchoring effect). This can suppress the peeling of the first layer 11 and the second layer 12.
(method for producing carbon nanotube Complex 1B)
Next, a method for producing the CNT composite 1B according to the present embodiment will be described with reference to fig. 9. Fig. 9 (a) to (f) are schematic diagrams illustrating a method for producing the CNT composite 1B.
The method for producing the CNT composite 1B of the present embodiment includes: a carbon nanotube production step (CNT production step), a first polymer material coating step, a second polymer material coating step, a transfer step, a polymer material curing step, and a peeling step. Since the CNT production process is the same as that in embodiment 1, the description thereof is omitted.
The first polymer material coating step is substantially the same as the polymer material coating step in embodiment 1, except that the precursor solution applied to the substrate B2 is the precursor solution P2 of the resin (i.e., the second layer 12), and therefore, a detailed description thereof is omitted.
As shown in (a) and (B) of fig. 9, the second polymer material coating process is a process of coating a precursor solution P1 of an elastic material (i.e., the first layer 11) on a precursor solution P2 of a resin coated on the substrate B2 by, for example, a blade coating method.
The transfer step is a step of transferring the CNTs 20 formed on the substrate B1 to the precursor solution P1 of the elastic material and the precursor solution P2 of the resin coated on the substrate B2. Specifically, in the transfer step, first, as shown in fig. 9 c, the CNTs 20 formed on the substrate B1 are pushed into the precursor solution P1 of the elastic material and the precursor solution P2 of the resin coated on the substrate B2 in the direction of the arrow (downward) shown in fig. 9 c. At this time, the pressure-feeding is performed until the end 20b of the CNT20 reaches the inside of the precursor solution P2 of the resin. As a result, as shown in fig. 9 (d), CNTs 20 were inserted into the precursor solution P1 of the elastic material and the precursor solution P2 of the resin.
The polymer material curing step is a step of heating (or drying) the precursor solution P1 of the elastic material and the precursor solution P2 of the resin to cure the precursor solution P1 and the precursor solution P2. Thereby, the base layer 10A is formed, and the CNTs 20 are fixed to the base layer 10A.
The peeling step is a step of peeling the base layer 10A (second layer 12) from the substrate B2 and peeling the CNTs 20 from the substrate B1 as shown in fig. 9 (e). Specifically, the substrate B1 and the CNT20 are separated by, for example, a cutter or the like, and the substrate B1 is peeled from the CNT20 upward in fig. 9 (e). Similarly, the substrate B2 is separated from the base layer 10A (second layer 12) by a cutter or the like, and the substrate B2 is peeled from the base layer 10A downward in fig. 9 (e). Thereby transferring the plurality of CNTs 20 to the matrix layer 10A.
As shown in fig. 9 (f), the CNT composite 1B in which the end portion 20A of the CNT20 is exposed from the first surface 10A of the first layer 10 of the base layer 10A and the other end portion 20B of the CNT20 is present in the second layer 12 can be manufactured in this manner.
In addition, in the CNT composite 1B of the present embodiment, the base layer 10A is composed of two layers (the first layer 11 and the second layer 12), but the CNT composite of the present invention is not limited thereto. In the CNT composite according to one embodiment of the present invention, the base layer may be composed of three or more layers. Thus, the CNT composite can have three or more functions (heat dissipation function, waterproof function, and the like in addition to the above functions). Therefore, the CNT composite according to one embodiment of the present invention can also be used for a heat sink material and the like. When the base layer is composed of three or more layers, the CNT composite may be formed such that the CNTs 20 are present in all layers, or the CNT composite may be formed such that the CNTs 20 are present only in a layer forming the surface of the CNT composite. Further, the CNT composite may be formed so that the CNTs 20 are present in a partial layer.
In the above embodiments, the embodiment in which the plurality of CNTs 20 formed on the substrate B1 are transferred to the base layer and then the substrate B1 is peeled off from the CNTs 20 has been described, but the method for forming the CNT composite according to the present invention is not limited to this. In one embodiment of the present invention, for example, after a plurality of CNTs 20 are separated (peeled) from a substrate B1 in advance by using a cutter to produce a sheet of a plurality of CNTs 20, the sheet-like CNTs 20 may be transferred (fixed) to a base layer.
The present invention is not limited to the above embodiments, and various modifications can be made within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention.
Description of the reference numerals
1. 1A, 1B-carbon nanotube composite (CNT composite); 10. 10A-a substrate layer; 20-Carbon Nanotubes (CNTs); 20 a-end; 22-amorphous layer (amorphous carbon); 40-vertically aligned carbon nanotubes (vertically aligned CNTs).
