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Preparation method of super-long gold nanorod

A gold nanorod and ultra-long technology, applied in the direction of nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of complex operation, inconvenient large-scale preparation of gold nanorods, high equipment requirements, etc., to achieve simple operation and small production ratio , the effect of easy shape control

Pending Publication Date: 2021-04-13
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical reduction method requires two reaction tanks for the preparation and growth reaction of "gold seed particles", the operation is complicated, and the equipment requirements are high, so it is not convenient to prepare gold nanorods in large quantities.

Method used

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  • Preparation method of super-long gold nanorod
  • Preparation method of super-long gold nanorod
  • Preparation method of super-long gold nanorod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: prepare 0.2M CTAB solution, 5mM chloroauric acid solution, 0.1M ascorbic acid solution, and 0.01M sodium borohydride solution with purified water respectively;

[0024] Step 2: Mix 9 ml of CTAB solution, 0.9 ml of chloroauric acid solution, and 72 microliters of ascorbic acid solution evenly, add 8.1 ml of purified water, and add 30 microliters of 0.5M sodium hydroxide solution; gently vibrate the mixed solution Until the color disappears, a colorless and transparent mixed solution is obtained;

[0025] Step 3: Add 14 microliters of sodium borohydride solution to the colorless and transparent mixed solution, the solution turns purple, and let it stand for 12 hours; centrifuge at 6000 rpm for 5 minutes, wash twice with water, and obtain gold nanorod materials.

[0026] During the reaction, chloroauric acid is added to provide Au(III) ions, and ascorbic acid is added. Ascorbic acid is a weak reducing agent, and ascorbic acid reduces Au(III) ions to Au(I) ions. Dur...

Embodiment 2

[0029] Step 1: prepare 0.2M CTAB solution, 5mM chloroauric acid solution, 0.1M ascorbic acid solution, and 0.01M sodium borohydride solution with purified water respectively;

[0030] Step 2: Mix 9 ml of CTAB solution, 0.9 ml of chloroauric acid solution, and 72 microliters of ascorbic acid solution evenly, add 8.1 ml of purified water, and add 40 microliters of 1.2M hydrochloric acid solution; gently vibrate the mixed solution to the color disappeared, and a colorless and transparent mixed solution was obtained;

[0031] Step 3: Add 14 microliters of sodium borohydride solution to the colorless and transparent mixed solution, the solution turns purple, and let it stand for 12 hours; centrifuge at 6000 rpm for 5 minutes, wash twice with water, and obtain gold nanorod materials.

[0032] Such as figure 2 As shown, the average length of gold nanorods prepared by the above method is 1.4 microns, the average aspect ratio is 42, the maximum length is 2.2 microns, and the maximum ...

Embodiment 3

[0034] Step 1: prepare 0.2M CTAB solution, 5mM chloroauric acid solution, 0.1M ascorbic acid solution, and 0.01M sodium borohydride solution with purified water respectively;

[0035] Step 2: Mix 9 ml of CTAB solution, 0.9 ml of chloroauric acid solution, and 72 microliters of ascorbic acid solution evenly, add 8.1 ml of pure water, and gently vibrate the mixed solution until the color disappears to obtain a colorless and transparent mixed solution;

[0036] Step 3: Add 14 microliters of sodium borohydride solution to the colorless and transparent mixed solution, the solution turns purple, and let it stand for 12 hours; centrifuge at 6000 rpm for 5 minutes, wash twice with water, and obtain gold nanorod materials.

[0037] Such as image 3 As shown, the average length of gold nanorods prepared by the above method is 0.8 micron, and the average aspect ratio is 38.

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Abstract

The invention discloses a preparation method of a super-long gold nanorod. The method comprises the following specific steps of preparing a hexadecyl trimethyl ammonium bromide aqueous solution, a chloroauric acid aqueous solution, an ascorbic acid aqueous solution and a sodium borohydride aqueous solution; uniformly mixing the hexadecyl trimethyl ammonium bromide aqueous solution, the chloroauric acid aqueous solution and the ascorbic acid aqueous solution, and performing gentle vibrating until the color disappears; and adding the sodium borohydride solution into the mixed solution, and performing standing for 12-24 hours at 25 DEG C. The length-diameter ratio of the super-long gold nanorod prepared through the method is in the range of 15 to 60. The invention provides the method capable of quickly and simply preparing the long gold nanorod. Besides, the invention also provides a preparation method for regulating and controlling the length of the gold nanorod in a large range. In addition, the invention also provides application of the prepared gold nanorod.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to a gold nanometer material, in particular to a preparation method of an ultralong gold nanorod. Background technique [0002] Among gold nanostructures of various shapes, the study of rod-shaped gold particles has gained more attention. Gold nanoparticles (gold nanorods) with a uniform rod shape have a strong absorption band in the region from visible light to near-infrared light, and the position of the absorption peak can be easily changed by shape control. Gold nanorods can be used to change physical properties through surface modification, so they have a wide range of applications. [0003] At present, the manufacturing methods of gold nanorods mainly include electrolysis, chemical reduction, and photoreduction. Among them, the chemical reduction method is the most widely used method to prepare gold nanorods. Chemical reduction method (referring to non-patent literature: N....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/07B22F1/054
Inventor 李敏张舒婷
Owner XUZHOU NORMAL UNIVERSITY