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Preparation method of nanostructure

A nanostructure and carbon nanotube structure technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve the problems of small length, limited length of silicon nitride nanowires, affecting product size and uniformity, etc. Simple, low-cost effects

Inactive Publication Date: 2010-06-16
TSINGHUA UNIV +1
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Problems solved by technology

[0006] However, the above-mentioned method of using carbon nanotubes as templates to grow nanomaterials has the following disadvantages: first, the carbon nanotubes used as templates are powder materials, and their length is limited, so the length of the prepared silicon nitride nanowires is relatively small; , using carbon nanotube powder as a template is not easy to control the shape of the product; third, the distribution of carbon nanotube powder is uneven and easy to agglomerate, which affects the size and uniformity of the product; fourth, the silicon nitride nanometer prepared by this method The wire cannot form a self-supporting structure (the so-called self-supporting structure means that the structure can maintain a specific shape without a substrate, such as a wire or a film), which limits its use

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preparation example Construction

[0030] See figure 1 , The present invention provides a method for preparing nanostructures, which includes the following steps:

[0031] Step 1: Provide a carbon nanotube structure.

[0032] The carbon nanotube structure is a self-supporting structure. The so-called "self-supporting structure" means that the carbon nanotube structure can maintain its own specific shape without being supported by a support. The carbon nanotube structure includes at least one carbon nanotube film, at least one carbon nanotube-like structure or a combination thereof. When the carbon nanotube structure includes a plurality of carbon nanotube films, the carbon nanotube films may be coplanar or stacked. When the carbon nanotube structure only includes a carbon nanotube-like structure, the carbon nanotube-like structure can be folded or wound into a layered carbon nanotube structure. When the carbon nanotube structure includes a plurality of carbon nanotube wire-like structures, the plurality of carbon...

Embodiment 1

[0071] See Picture 9 , The first embodiment of the present invention provides a method for preparing the titanium dioxide nanostructure 104, which specifically includes the following steps:

[0072] Step 1: Provide a two-dimensional carbon nanotube structure 100, which includes two drawn carbon nanotube films stacked in the same direction.

[0073] In this embodiment, two drawn carbon nanotube films are laminated and laid on a metal ring to obtain a carbon nanotube structure 100, and the carbon nanotubes in the two drawn carbon nanotube films are arranged in the same direction.

[0074] Step two, introducing titanium reaction raw material 102 and oxygen into the carbon nanotube structure 100.

[0075] In this embodiment, a 100-nanometer-thick titanium layer is deposited on the surface of the carbon nanotube structure 100 by magnetron sputtering. See Picture 10 , The titanium particles are uniformly distributed on the surface of the carbon nanotubes in the drawn carbon nanotube film....

Embodiment 2

[0082] See Figure 14 The second embodiment of the present invention provides a method for preparing the titanium dioxide nanostructure 204. The preparation method of the titanium dioxide nanostructure 204 is basically the same as the preparation method of the titanium dioxide nanostructure in the first embodiment of the present invention. The difference is that: in this embodiment, two carbon nanotube stretched films are stacked and vertically cross-laid as a template Growth of titanium dioxide nanostructures 204.

[0083] This embodiment specifically includes the following steps:

[0084] Step 1: Provide a two-dimensional carbon nanotube structure 200, the carbon nanotube structure 200 includes two stacked and vertically cross-laid drawn carbon nanotube films.

[0085] In this embodiment, two drawn carbon nanotube films are stacked and laid vertically and crosswise on a metal ring to obtain a carbon nanotube structure 200. The arrangement direction of the carbon nanotubes in the ...

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Abstract

The invention relates to a preparation method of a nanostructure, comprising the following steps of: providing a carbon nanotube at least of which a part is arranged in a suspending way; introducing reaction materials into the carbon nanotube; initiating the reaction materials to react, and forming the nanostructure on the surface of the carbon nanotube structure.

Description

Technical field [0001] The invention relates to a method for preparing nanostructures, in particular to a method for preparing nanostructures by using a template method. Background technique [0002] Nanomaterials have great value in basic research and practical applications, such as catalysis and sensing. Therefore, the preparation method of nanomaterials has become a research hotspot. At present, the preparation methods of nanomaterials can be divided into spontaneous growth, template-based synthesis, electrospinning, lithography, etc. [0003] The prior art provides a method for preparing titanium dioxide nanowires by electrospinning, please refer to "Fabrication of Titania Nanofibers by Electrospinning" (Dan Li et al, NanoLetters, vol. 3, No. 4, p555-560 (2003)) . In the method, mineral oil is mixed with an ethanol solution of polyvinylpyrrolidone (PVP) and a titanium dioxide precursor to prepare a slurry, and then the titanium dioxide nanostructure is prepared by electrospi...

Claims

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Application Information

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IPC IPC(8): B82B3/00
Inventor 王佳平温佳佳程群峰姜开利李群庆范守善
Owner TSINGHUA UNIV
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