摘要:
A method for measuring a thermal conductivity of a one-dimensional material is provided. The method includes the following steps: providing the one-dimensional material whose characteristic band frequency value of Raman-spectra varies linearly with its temperature and a thermal conductivity measurement apparatus; obtaining a length ΔL of the suspended part of the one-dimensional material and a cross sectional area S of the one-dimensional material; connecting the four electrodes with the one-dimensional material; heating the one-dimensional material with a current and the one-dimensional material reaches heat balance; acquiring a power P flowing through the suspended part of the one-dimensional material along an axial direction of the one dimensional material; obtaining a temperature difference ΔT between a middle point and one of the two end points of the suspended part of the one-dimensional material; and calculating the thermal conductivity ω of the one-dimensional material in accordance with: ω = P Δ L S Δ T .
摘要:
An electrostrictive composite includes a flexible polymer matrix, a plurality of carbon nanotubes and a plurality of reinforcing particles dispersed in the flexible polymer matrix. The carbon nanotubes cooperatively form an electrically conductive network in the flexible polymer matrix.
摘要:
A method for making a carbon nanotube composite includes providing a free-standing carbon nanotube structure and a reacting liquid with a metal compound dissolved therein, treating the carbon nanotube structure by applying the reacting liquid on the carbon nanotube structure, and heating the treated carbon nanotube structure in an oxide-free environment to decompose the metal compound.
摘要:
A method for making the thermal electron emitter includes following steps. Providing a carbon nanotube film including a plurality of carbon nanotubes. Treating the carbon nanotube film with a solution comprising of a solvent and compound or a precursor of a compound, wherein the compound and the compound that is the basis of the precursor of a compound has a work function that is lower than the carbon nanotubes. Twisting the treated carbon nanotube film to form a carbon nanotube twisted wire. Drying the carbon nanotube twisted wire. Activating the carbon nanotube twisted wire.
摘要:
A method of preparing a carbon nanotube/polymer composite material is provided. The method includes (a) providing a carbon nanotube-based film and a pre-polymer solution; (b) placing the carbon nanotube-based film at a bottom of a container, and pouring the pre-polymer solution in the container; and (c) polymerizing the pre-polymer solution and simultaneously integrating the pre-polymer solution with the carbon nanotube-based film. As such, a carbon nanotube/polymer composite material, including the polymer-impregnated nanotube layer and an upper polymer layer, is obtained. A multi-layer composite can be produced by essentially repeating this process, using the upper polymer layer as the base layer for the formation of the next layer set thereon.
摘要:
This disclosure is related to a heater. The heater includes a carbon nanotube composite structure and at least two electrodes connected to the carbon nanotube composite structure. The carbon nanotube composite structure defines a hollow space. The carbon nanotube composite structure includes a matrix and at least one carbon nanotube structure. The at least one carbon nanotube structure includes a plurality of carbon nanotubes joined by van der Waals attractive force therebetween. An angle between a primary alignment direction of the carbon nanotubes and a surface of the carbon nanotube structure is about 0 degrees to about 15 degrees.
摘要:
The present polymer composite p-n junction includes an n-type polymer composite layer and a p-type polymer composite layer. The n-type composite polymer layer includes a first polymer material and a number of electrically conductive particles imbedded therein. The p-type composite polymer layer includes a second polymer material and a number of carbon nanotubes (CNTs) imbedded therein. A method for manufacturing the polymer composite p-n junction and a polymer composite diode incorporating the polymer composite p-n junction are also provided.
摘要:
A thermoelectric composite material includes a carbon nanotube structure and an electrically conductive polymer layer. The carbon nanotube structure includes a plurality of carbon nanotubes and spaces. The electrically conductive polymer layer is coated on surfaces of the carbon nanotubes.
摘要:
An electrolytic capacitor includes a first electrode, a second electrode opposite to the first electrode, a separator sandwiched between the first electrode and the second electrode, a cell accommodating the first electrode, the second electrode and the separator, and an electrolytic solution filled into the inner space of the cell, with the first electrode, the second electrode and the separator immersed into the electrolytic solution. The first electrode and second electrode are in a CNT film structure, wherein the CNT film includes a number of CNTs packed closely, substantially parallel to a surface of the CNT film, and isotropically arranged along a fixed direction or along random directions. The electrolytic capacitor is a high-performance capacitor.
摘要:
A planar heater includes a planar supporter, two electrodes and a heating element. The heating element is supported by the planar supporter and electrically connected between the two electrodes. The heating element includes at least one carbon nanotube structure and a matrix. The at least one carbon nanotube structure includes a carbon nanotube film including of a plurality of carbon nanotubes. An angle between a primary alignment direction of the carbon nanotubes and a surface of the carbon nanotube film is about 0 degrees to about 15 degrees.