Location method for nano materials synthesis used catalyst

A technology of nanomaterials and catalysts, which is applied in the field of positioning of catalysts for nanomaterial synthesis, can solve the problems of no deposition, substrate contamination, and no practical value, and achieves improved selectivity, strong practicability, and improved Effect of deposition ability

Inactive Publication Date: 2010-01-13
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantage of these fixed-site catalyst methods is that no matter it is spin-coating catalyst solution or self-assembly, since the substrate contacts a large amount of catalyst solution, other parts on the substrate will be contaminated during the peeling process.
However, the size of the catalyst particles required for the synthesis of carbon nanotubes is generally above 2 nanometers, and the ordinary nano dip pen printing method basically does not have the ability to deposit a sufficient amount of catalyst particles, so on-site deposition can be used to synthesize carbon nanotubes. Catalyst aspect, not of practical value

Method used

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  • Location method for nano materials synthesis used catalyst
  • Location method for nano materials synthesis used catalyst
  • Location method for nano materials synthesis used catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, the location of the catalyst for the synthesis of carbon nanotubes

[0037] 1. The positioning of the catalyst

[0038] A schematic diagram of the process flow for positioning a catalyst is shown in figure 1 shown. in figure 1 In (a) the needle tip 4 with the catalyst solution 3 approaches the substrate 1 spin-coated with the photoresist 2; figure 1 In (b), the needle tip 4 with the catalyst solution 3 pierces the photoresist 2, and the catalyst solution 3 contacts the substrate 1; figure 1 In (c) after the tip 4 of the atomic force microscope leaves, the catalyst solution 3 remaining in the groove of the scratched photoresist 2 contacts the substrate 1; figure 1 In (d) is the catalyst 5 positioned on the surface of the substrate 1 obtained after stripping the photoresist and burning.

[0039] The specific steps are as follows:

[0040] 1. Clean the substrate: use quartz as the substrate, cut the quartz into small pieces of 1cm×1cm square, with a thi...

Embodiment 2

[0047] Embodiment 2, the positioning of the catalyst for the synthesis of carbon nanotubes

[0048] The process flow diagram of the method for positioning the two catalysts is shown in figure 2 shown. figure 2 Middle (a) is the substrate 1 that is spin-coated with photoresist 2; figure 2 In (b), the needle tip 4 with the first catalyst solution 3 scratches the photoresist 2, and the first catalyst solution 3 contacts the substrate 1; figure 2 In (c) after positioning the first catalyst solution 3, use the needle tip 7 with the second catalyst solution 6 to scratch the photoresist 2, and the second catalyst solution 6 contacts the substrate 1; figure 2 (d) is the first catalyst solution 3 and catalyst solution 6 positioned in the groove of the photoresist 2; figure 2 (e) is catalyst 5 (obtained from catalyst solution 3) and catalyst 8 (obtained from catalyst solution 6) positioned on the surface of substrate 1 after peeling and burning.

[0049] 1. Using quartz as the...

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PUM

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Abstract

The invention relates to a method for positioning the catalyst of carbon composition nanometer tube, wherein it comprises: (1), coating photo resist on the substrate to be dried; (2), preparing catalyst solution; (3), using the needle of atomic force microscope with catalyst solution to pass through the photo resist coat, to transfer the solution on the needle sharp to the substrate; (4), removing photo resist to obtain the substrate positioned with catalyst image. The invention can obtain the catalyst image whose line width is in 1 mum, point diameter is in 1micrometer, and position accuracy is in 5 mum, while it is at centimeter range; and it can accurately position at least two kinds of catalysts on one substrate. Compared with common nanometer dip pen print technique, the invention can deposit more material, and the deposited catalyst can composite carbon nanometer tube.

Description

technical field [0001] The invention relates to a positioning method of a catalyst used for nanometer material synthesis. Background technique [0002] Due to its unique structure, carbon nanotubes have excellent properties in many aspects, and are a new type of nanomaterials with very good application prospects in many fields. In many cases, for the purpose of research and application, it is necessary to synthesize single-walled carbon nanotubes on a flat substrate surface. The premise and core of the fixed-point synthesis of carbon nanotubes is the positioning of the catalyst, and the size of the catalyst particles required for the synthesis of single-walled carbon nanotubes is generally around a few nanometers. How to precisely position the catalyst nanoparticles on the substrate surface for single-walled carbon nanotubes The synthesis of nanotubes has important value and significance. [0003] At present, there are many technologies for locating catalysts. The position...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/00C01B31/02
Inventor 张锦张永毅张依刘忠范
Owner PEKING UNIV
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