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Adjustable plasma wave gold nano bar preparation method

A gold nanorod and plasma technology, which is applied in the field of preparation of new gold nanorods, can solve the problems of not preparing gold nanorods, poor reproducibility and difficulty, and achieves easy popularization, simple operation and good reproducibility. Effect

Inactive Publication Date: 2009-06-03
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when preparing gold nanorods with longitudinal plasmon waves greater than 850 nm, the reproducibility is generally poor, and it is very difficult to accurately obtain nanorods with longitudinal plasmon waves greater than 850 nm
In addition, the transverse plasmon wave of traditional gold nanorods currently prepared is around 520nm, and a gold nanorod with adjustable transverse plasmon wave has not yet been prepared.

Method used

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  • Adjustable plasma wave gold nano bar preparation method
  • Adjustable plasma wave gold nano bar preparation method
  • Adjustable plasma wave gold nano bar preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Get a gold nanorod 3ml prepared by gold nanoseed reduction method, the gold nanorod length is 55nm, width is 17nm ( figure 1 ), and its corresponding longitudinal plasmon resonance wavelength is at 784nm ( figure 2 ), disperse gold nanorods in 0.1mol / L hexadecyltrimethylammonium bromide solution, add 0.2ml sodium thiosulfate solution (0.1mol / L), and heat at 50°C, use near-infrared The absorption spectrum is carried out monitoring, puts into the ice water cooling after 10 minutes, centrifuges then, obtains length and is 60nm, the novel gold nanorod ( image 3 ), and its corresponding longitudinal plasmon resonance absorption wavelength is 865nm ( Figure 4 ) of gold nanorods.

Embodiment 2

[0034] Get a gold nanorod 3ml prepared by gold nanoseed reduction method, the gold nanorod length is 55nm, width is 17nm ( figure 1 ), and its corresponding longitudinal plasmon resonance wavelength is at 784nm ( figure 2 ), disperse the gold nanorods in a 0.1mol / L hexadecyldimethylphenylammonium bromide solution, add 0.2ml of 0.1mol / L sodium sulfide, heat and keep it constant at 50°C, and implement it with near-infrared absorption spectroscopy Monitor, put into ice water after 10 minutes and cool down, then obtain length and be 60nm, width 30nm nanorod ( Figure 5 ), which corresponds to gold nanorods with a longitudinal absorption wavelength of 651 nm.

Embodiment 3

[0036] Get 3mL of gold nanorods prepared by the gold nanoseed reduction method, the gold nanorods are 40nm long and 12nm wide ( Image 6 ), the corresponding longitudinal plasmon resonance wavelength is 732nm, gold nanorods are dispersed in 0.1mol / L hexadecyltrimethylammonium bromide solution, and 0.2mL of 0.1mol / L sulfurized gold nanorods are added to the dispersion system ammonium, heated and kept at 50°C, put into ice water to cool after 10 minutes, and then centrifuged to obtain a length of 50nm and a width of 24nm nanorods ( Figure 7 ), which corresponds to gold nanorods with a longitudinal absorption wavelength of 721 nm.

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Abstract

The process of preparing plasma wave adjustable nanometer gold rod is process of preparing nanometer gold rod with selective red shift. The process is one heating process with sodium thiosulfate or soluble sulfide added to obtain cutworm-shaped nanometer gold rod in obviously raised diameter and slightly increase length. The nanometer gold rod has increased plasma wave, and the process is simple and repeatable.

Description

technical field [0001] The present invention relates to a preparation method of a novel gold nanorod similar to a caterpillar, in particular a method for regulating the plasma wave of the gold nanorod, more specifically, the method of adding related reagents to make the plasma of the gold nanorod The resonance wave is red-shifted. Background technique [0002] Gold nanorods are solid gold cylinders approximately 10-20 nm in diameter and 40-200 nm in length. Shaping the material into a rod shape is important because the shape of the rod determines the energy of the light that the electrons excite. Therefore, different wavelengths of light can be excited by nanorods of different lengths. The plasmon resonance absorption curve of gold nanorods can be characterized by UV-Vis spectroscopy. Traditional gold nanorods generally have an absorption peak at 520nm and another larger wavelength, which correspond to the transverse plasmon wave and Longitudinal plasma waves. The transv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/16
Inventor 黄昊文贺超才曾云龙夏晓东于贤勇
Owner HUNAN UNIV OF SCI & TECH