Preparation method of gold nanorods with different length-diameter ratios

A gold nanorod, aspect ratio technology, applied in nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of difficult to achieve precise control of different aspect ratios, low purity of GNRs, and cumbersome feeding ratio. The effect of inhibiting side growth, uniform morphology and wide control range
CN106984830AInactive Publication Date: 2017-07-28SHANGHAI INSTITUTE OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI INSTITUTE OF TECHNOLOGY
Publication Date
2017-07-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of gold nanorods with different length-diameter ratios. The preparation method comprises the following specific steps that 1, a sodium borohydride reducing agent is added into a mixed solution composed of stearyl trimethyl ammoium bromide and chloroauric acid for reacting, and a gold nanoseed solution is prepared; 2, after a stearyl trimethyl ammoium bromide solution, a chloroauric acid solution and a silver nitrate solution are mixed, a glucose solution is added, the gold nanoseed solution obtained in the step 1 is poured into the mixed solution, and the gold nanorods with different length-diameter ratios are prepared by singly regulating and controlling the adding amount of silver nitrate; 3, centrifugal separation is conducted through a temperature difference centrifugation method, and gold nanorod sol is obtained. According to the preparation method, operation is easy, and the regulating and controlling range is wide; the obtained gold nanorods with different length-diameter ratios have the advantages of being good in dispersibility and uniform in particle size and can be widely applied to the fields of biosensing, surface-enhanced Raman scattering and the like.
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Description

technical field

[0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method of gold nanorods with different aspect ratios. Background technique

[0002] As one of the noble metal (gold, silver, cobalt) nanomaterials family, gold nanorods (GNRs) have been a research hotspot in recent years. Since gold nanorods have two surface plasmon resonance absorption peaks: the plasmon absorption peak (TSPR) on the horizontal axis and the plasmon absorption peak (LSPR) on the vertical axis, where TSPR changes little with the aspect ratio of the nanorods, However, LSPR is sensitive to changes in the aspect ratio of nanorods. According to the peak position of LSPR, the size of nanorods can be monitored in real time. At the same time, gold nanorods with different aspect ratios show different surface-enhanced Raman spectroscopy (SERS) activities due to differences in surface plasmon resonance properties. In addition, go...

Claims

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