Arrayed silver nanorods with surface-modifying gold nanoparticles and preparation method thereof

A technology of gold nanoparticles and silver nanorods, which is applied in the field of nanomaterials, can solve the problems of poor surface affinity and stability damage of silver, and achieve the effects of controllable shape, safe and convenient operation, and good assembly effect

Active Publication Date: 2013-11-27
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the silver nanorod array has a good application prospect, due to its bare silver surface, it is easily oxidized by the gas in the environment in practical application, especially when it is applied in the biological field, the silver surface has poor affinity with biological samples and has poor stability. Vulnerable to biological agents

Method used

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  • Arrayed silver nanorods with surface-modifying gold nanoparticles and preparation method thereof
  • Arrayed silver nanorods with surface-modifying gold nanoparticles and preparation method thereof
  • Arrayed silver nanorods with surface-modifying gold nanoparticles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The surface-modified gold nanoparticles of arrayed silver nanorods are prepared by the following steps:

[0042] (1) Prepare a citric acid aqueous solution with a concentration of 0.6M, immerse the glass slide deposited with silver nanorod arrays in the citric acid aqueous solution for 10 minutes, rinse with ultrapure water after taking it out, and dry it with nitrogen;

[0043] (2) Prepare a polydiallyldimethylammonium chloride aqueous solution with a mass concentration of 0.5%, immerse the glass slide treated in step (1) in the polydiallyldimethylammonium chloride aqueous solution, soak After 30 min, the slides were taken out, rinsed with ultrapure water, dried with nitrogen, and sealed for storage;

[0044] (3) The gold colloid was prepared by reducing sodium citrate to chloroauric acid, and the prepared gold colloid was placed in a clean glass test tube, and the glass slides treated in step (2) were immersed in the gold colloid for the soaking time After 3 hours, w...

Embodiment 2

[0046] The surface-modified gold nanoparticles of arrayed silver nanorods are prepared by the following steps:

[0047] (1) Prepare a citric acid aqueous solution with a concentration of 0.6M, immerse the glass slide deposited with silver nanorod arrays in the citric acid aqueous solution for 10 minutes, rinse with ultrapure water after taking it out, and dry it with nitrogen;

[0048] (2) Prepare a polydiallyldimethylammonium chloride aqueous solution with a mass concentration of 0.5%, immerse the glass slide treated in step (1) in the polydiallyldimethylammonium chloride aqueous solution, soak After 40 min, the slides were taken out, rinsed with ultrapure water, dried with nitrogen, and sealed for storage;

[0049] (3) The gold colloid was prepared by reducing sodium citrate to chloroauric acid, and the prepared gold colloid was placed in a clean glass test tube, and the glass slides treated in step (2) were immersed in the gold colloid for the soaking time After 5 hours, w...

Embodiment 3

[0051] The surface-modified gold nanoparticles of arrayed silver nanorods are prepared by the following steps:

[0052] (1) Prepare an aqueous acetic acid solution with a concentration of 0.4M, immerse the glass slide deposited with silver nanorod arrays in the aqueous acetic acid solution for 15 minutes, rinse with ultrapure water after taking it out, and dry it with nitrogen;

[0053] (2) Prepare a polydiallyldimethylammonium chloride aqueous solution with a mass concentration of 0.8%, immerse the glass slide treated in step (1) in the polydiallyldimethylammonium chloride aqueous solution, soak After 30 min, the slides were taken out, rinsed with ultrapure water, dried with nitrogen, and sealed for storage;

[0054] (3) The gold colloid was prepared by reducing sodium citrate to chloroauric acid, and the prepared gold colloid was placed in a clean glass test tube, and the glass slides treated in step (2) were immersed in the gold colloid for the soaking time After 8 hours, ...

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Abstract

The invention specifically relates to arrayed silver nanorods with surface-modifying gold nanoparticles and a preparation method thereof, belonging to the field of nano-materials. The objective of the invention is to realize surface modification of a silver nanorod array prepared by using a physical evaporation coating process; the surfaces of silver nanorods are modified by polyelectrolyte (poly[diallyldimethylammonium chloride]) with positive electricity at first, then gold nanoparticles having a diameter of about 15 nm and synthesized by using a wet chemical process are used as a raw material which self-assembles on the surfaces of silver nanorods through electrostatic interaction, and thus, the silver nanorod array with surface-modifying gold nanoparticles is prepared. The technology of gold nanoparticle modification of the surfaces of silver nanorods brought forward in the invention has the advantages of safe and easy operation, mild conditions, low cost, etc. and enables gold nanoparticles to be uniformly fixed on the surfaces of silver nanorods so as to form a gold-silver composite structure.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to an array-type silver nanorod whose surface is modified with gold nanoparticles and a preparation method thereof. Background technique [0002] Metal nanoparticles have attracted widespread attention due to their unique and huge potential application value in optics, electricity, catalysis, surface enhancement and other properties, and have been gradually applied in many fields. Although nanomaterials have good application prospects, the practical application of nanomaterials faces great challenges due to factors such as material properties, interface properties, and stability of nanomaterials themselves. The array-type silver nanorods prepared by physical evaporation coating process have been confirmed to have many unique and exciting properties, such as the array has a strong surface enhancement effect, and the enhancement factor is as high as 10 8 , and has good uniformity a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/02
Inventor 宋春元汪联辉黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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