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A Controllable Patterned Ultrafast Laser Composite Fabrication Method of Metal Oxide Nanowires

An ultrafast laser, oxide technology, applied in the preparation of oxide/hydroxide, oxygen/ozone/oxide/hydroxide, chemical instruments and methods, etc., can solve the problems of complex process and high cost, Achieve the effect of accelerating the growth process, improving support strength and reducing cracking

Active Publication Date: 2017-01-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A few studies have achieved the growth of one-dimensional CuO nanowires on the surface of bulk copper with millimeter thickness, but the growth process takes several days to complete [Y W Zhu, et al., Nanotechnology, 16(2005) 88-92]
In addition, the existing patterned growth of CuO nanowires based on thermal oxidation process requires the assistance of mask, photolithography, deposition and other technical means, and can be realized by forming a patterned growth source or a patterned suppression source. The process is complex and costly

Method used

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  • A Controllable Patterned Ultrafast Laser Composite Fabrication Method of Metal Oxide Nanowires
  • A Controllable Patterned Ultrafast Laser Composite Fabrication Method of Metal Oxide Nanowires
  • A Controllable Patterned Ultrafast Laser Composite Fabrication Method of Metal Oxide Nanowires

Examples

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Effect test

Embodiment 1

[0062] Example 1. Picosecond pulsed laser preparation of micro-nano precursor structure on Cu surface to realize patterned growth of CuO nanowires

[0063] The controllable patterning preparation of CuO nanowires in this embodiment includes the following steps:

[0064] (1) Remove the oxide layer on the surface of the bulk Cu by mechanical grinding, and make the surface reach a certain degree of smoothness, then clean the Cu surface with alcohol, and blow or dry the surface of the Cu block after cleaning.

[0065] (2) Use picosecond pulse laser with a center wavelength of 1064nm and a pulse width of 10 picoseconds. The laser beam is deflected by a galvanometer, and then focused on a rectangular block copper surface through a scene with a focal length of 100mm. The diameter of the focal spot is 30μm. The bulk copper has an area of ​​25mm×25mm and a thickness of 3mm.

[0066] The laser parameters are: the average power is 18W, the pulse frequency is 100kHz, the laser deflection...

Embodiment 2

[0070] Example 2. Picosecond pulsed laser preparation of micro-nano precursor structure on Cu surface to realize patterned growth of CuO nanowires

[0071] The controllable patterning preparation of CuO nanowires in this embodiment includes the following steps:

[0072] (1) Remove the oxide layer on the surface of the bulk Cu by mechanical grinding, and make the surface reach a certain degree of smoothness, then clean the Cu surface with alcohol, and blow or dry the surface of the Cu block after cleaning.

[0073] (2) Use picosecond pulse laser with a center wavelength of 1064nm and a pulse width of 10 picoseconds. The laser beam is deflected by a galvanometer, and then focused on a rectangular block copper surface through a scene with a focal length of 100mm. The diameter of the focal spot is 30μm. The bulk copper has an area of ​​25mm×25mm and a thickness of 3mm.

[0074] The laser parameters are: the average power is 18W, the pulse frequency is 100kHz, the laser deflection...

Embodiment 3

[0078] Example 3. Femtosecond pulsed laser preparation of micro-nano precursor structure on Cu surface to realize patterned growth of CuO nanowires

[0079] The controllable patterning preparation of CuO nanowires in this embodiment includes the following steps:

[0080] (1) Remove the oxide layer on the surface of bulk Cu by grinding, and make the surface reach a certain degree of smoothness, and then clean the Cu surface with alcohol.

[0081] (2) Femtosecond pulsed laser is selected, with a central wavelength of 1064nm and a pulse width of 800 femtoseconds. The laser beam is deflected by a galvanometer, and then focused on a rectangular block copper surface through a scene with a focal length of 100mm, and the focal spot diameter is 30μm. The bulk copper has an area of ​​30mm×30mm and a thickness of 1mm.

[0082] The laser parameters are: the average power is 15W, the pulse frequency is 200kHz, the laser deflection track is parallel lines, the line spacing is 50μm, the sca...

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Abstract

The invention discloses a controllable patterning ultrafast laser composite preparation method for metal oxide nano wires. The method comprises the following steps: (1), according to a preset pattern, irradiating the surface of a block metal by utilizing ultrafast laser to obtain a patterning micro-nano structure, namely a metal oxide nanowire precursor, on the block metal; and (2), under the oxidizing atmosphere, heating the block metal attached with the metal oxide nanowire precursor, and keeping the temperature, and cooling down, so that the metal oxide nanowires in-situ grow on the metal oxide nanowire precursor. According to the controllable patterning ultrafast laser composite preparation method for the metal oxide nano wires, by utilizing control of the ultrafast laser processing procedure on the structure distribution form of the metal surface micro-nano precursor, the control on the metal oxide nanowire distribution form can be realized; meanwhile, by virtue of the control on factors, such as the heating temperature, the heat preservation time and the oxidization atmosphere, in a thermal oxidization process, the control on the diameters, the lengths and the growth density of the metal oxide nanowires can be realized.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and laser micro-nano manufacturing, and in particular relates to a controllable patterned ultrafast laser compound preparation method of metal oxide nanowires. Background technique [0002] Copper oxide (CuO) nanowire is an excellent one-dimensional semiconductor nanomaterial with special electrical, magnetic, optical, catalytic, gas-sensing and other physical and chemical properties. It is used in solar cells, photodetectors, photocatalysis, Lithium-ion batteries, supercapacitors, field emission devices, biological / gas sensors, and superhydrophobic / self-cleaning materials have potential application values, and have attracted great attention from researchers at home and abroad. The controllable patterning preparation of CuO nanowires is of great significance for giving full play to its special properties and realizing its industrial application. [0003] Existing methods for prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B13/14C01G3/02C01G9/02C01G23/047C01G49/06C01G41/02C01F5/04
CPCC01B13/322C01P2004/03C01P2004/04C01P2004/16
Inventor 钟敏霖范培迅张红军
Owner TSINGHUA UNIV
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