![]() ![]() Therefore, there is currently a need for a method suitable for low-cost, large-area preparation of high-density aligned carbon nanotube film, and can achieve patterning and customization to meet various applications in the industrialization of carbon-based integrated circuits. The disadvantage of using trenches to prepare carbon nanotubes is that the carbon nanotubes obtained by this method are not a continuous film, but strips, which are not suitable for industrialized large-area processing technology in the method of using the evaporation principle, the minimum trench size can only be 70 nm, which has great limitations. Due to the repeated extrusion process, the carbon tubes will be stacked to form multiple layers, and this process cannot ensure that each site is truly uniform. The carbon nanotube film prepared by the LS method has large area inhomogeneity, and the carbon tube film is multi-layered, which has a negative impact on the electrical properties (transistor). However, these preparation methods still have various deficiencies. Ribbon-shaped carbon tubes can be prepared by using the evaporation principle. Trenches can be dug to allow carbon tubes to enter the trenches. Due to their ideal one-dimensional structure and excellent properties in the fields of mechanics, electricity, and heat, carbon nanotubes have shown broad application prospects in interdisciplinary fields such as materials science, chemistry, and physics, and more and more attention has been paid to scientific research and industrial applications, but the prepared carbon nanotubes are generally in the form of particles or powders, which causes a lot of inconvenience to the applications for people.Īt present, the Langmuir-Schaefer (LS) method can be used to prepare the carbon nanotube film, which was squeezed back and forth at a certain speed by the pushing and pulling plate then, the carbon tube arrays on the solution can be transferred to the substrate in parallel by the method of Langmuir-Schaefer. The special structure of carbon nanotubes determines their special properties, such as high tensile strength and high thermal stability With the change of the helical way of carbon nanotubes, carbon nanotubes can exhibit metallic or semiconducting properties. BACKGROUNDĬarbon nanotubes are a new type of carbon material discovered in 1990's, and can be categorized into single-walled carbon nanotubes and multi-walled carbon nanotubes. The present disclosure relates to the field of carbon nanotubes, in particular to a method for preparing a high-density aligned carbon nanotube film. The entire contents of the above applications are incorporated into the present application by reference. 4, 2019 and titled “Device and method for preparing carbon nanotube film”. 4, 2019 and titled “Method for preparing carbon nanotube film by pulling method”, and the priority of the Chinese patent application CN201910831831.6 filed on Sep. 4, 2019 and titled “Method for preparing carbon nanotube film by printing method”, the priority of the Chinese patent application CN201910831548.3 filed on Sep. 4, 2019 and titled “Method for preparing patterned carbon nanotube film”, the priority of the Chinese patent application CN201910831824.6 filed on Sep. 4, 2020, which claims the priority of the Chinese patent application CN201910831550.0 filed on Sep. The present application claims the priority of the international application PCT/CN2020/113380 filed on Sep. To reduce the size of the bundles and stabilize the solution, an ultrasonic horn with an ultrasonic bath were combined as mechanical stress for CNT dispersion, and some chemicals such as sodium dodecyl sulfate (SDS)-a surfactant, N-methyl-2-pyrrolidone (NMP)-a solvent, or chitosan were used to meet our requirements.CROSS-REFERENCE TO RELATED APPLICATIONS AND INCORPORATION BY REFERENCE The size of the head printer nozzles required very small particles, about a few micrometers, in order to be able to print on the sensitive position of the antenna. ![]() Our purpose was to reduce as small as possible CNTs bundles, in order to realize ink to print on an RFID antenna. However, due to their entanglement state, their size and the different interacting forces between nanotubes bundles present at nanometric scale, CNTs debundling is very hard to achieve, requiring specific equipment and chemicals. The use of carbon nanotubes (CNTs) in radio frequency identification (RFID) applications offers a very large range of possibilities to exploit the incredible properties of CNTs. ![]()
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