Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Seedless preparation method of gold nanorods

A gold nanorod, seedless technology is applied in the field of one-step preparation of gold nanorods in aqueous phase without using a seed solution, which can solve the problem of many spherical particles, poor morphology uniformity of gold nanorods, and narrow adjustable range of longitudinal surface plasmon resonance absorption. and other problems, to achieve the effect of narrow half-peak width, uniform morphology, and short preparation cycle.

Inactive Publication Date: 2018-11-27
NANJING UNIV OF POSTS & TELECOMM
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gold nanorods obtained by the classical seedless method have poor morphology uniformity, more spherical particles, and a narrower adjustable range of longitudinal surface plasmon resonance absorption.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Seedless preparation method of gold nanorods
  • Seedless preparation method of gold nanorods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Weigh 180mg of cetyltrimethylammonium bromide and 35mg of sodium oleate, add 9.8mL of water, place in a 50°C water bath to dissolve completely, then cool down to 30°C.

[0030] (2) Add 360μL of 4mM AgNO to the above solution 3 solution. After standing for 15 min, add 200 μL of 25 mM HAuCl 4 solution and stirred for 50 min.

[0031] (3) Add 360 μL of 1M HCl solution to the above solution, and stir for 5 minutes.

[0032] (4) Quickly add 37.5 μL of 85.7 mM ascorbic acid solution and 7.5 μL of freshly prepared 10 mM NaBH to the above solution 4 The solution was stirred for 10 seconds and then allowed to stand for 5 hours, and purified by centrifugation to obtain the product.

[0033] The experimental results show that the obtained gold nanorods have a size of 24.3±2.7nm×77.7±8.0nm, a maximum absorption peak position of 735nm, a half-maximum width of 106nm, uniform morphology, almost no spherical particles, and rod-shaped products>99.5%.

Embodiment 2

[0035] (1) Weigh 180mg of cetyltrimethylammonium bromide and 25mg of sodium oleate, add 9.8mL of water, place in a 50°C water bath to dissolve completely, and then cool down to 30°C.

[0036] (2) Add 360μL of 4mM AgNO to the above solution 3 solution. After standing for 15 min, add 200 μL of 25 mM HAuCl 4 solution and stirred for 50 min.

[0037] (3) Add 360 μL of 1M HCl solution to the above solution, and stir for 5 minutes.

[0038] (4) Quickly add 37.5 μL of 85.7 mM ascorbic acid solution and 7.5 μL of freshly prepared 10 mM NaBH to the above solution 4 The solution was stirred for 10 seconds and then allowed to stand for 5 hours, and purified by centrifugation to obtain the product.

[0039] The experimental results show that the size of the obtained gold nanorods is 11.9±2.0nm×57.6±6.3nm, the maximum absorption peak position is 889nm, the half-maximum width is 144nm, the shape is uniform, and the rod-shaped products are >99%.

Embodiment 3

[0041] (1) Weigh 140mg of cetyltrimethylammonium bromide and 25mg of sodium oleate, add 9.8mL of water, place in a 50°C water bath to dissolve completely, and then cool down to 30°C.

[0042] (2) Add 360μL of 4mM AgNO to the above solution 3 solution. After standing for 15 min, add 200 μL of 25 mM HAuCl 4 solution and stirred for 50 min.

[0043] (3) Add 864 μL of 1M HCl solution to the above solution, and stir for 5 minutes.

[0044] (4) Quickly add 37.5 μL of 85.7 mM ascorbic acid solution and 7.5 μL of freshly prepared 10 mM NaBH to the above solution 4 The solution was stirred for 10 seconds and then allowed to stand for 5 hours, and purified by centrifugation to obtain the product.

[0045]The experimental results show that the size of the obtained gold nanorods is 12.2±2.0nm×77.0±6.9nm, the position of the maximum absorption peak is 1025nm, the half-maximum width is 168nm, the shape is uniform, and the rod-shaped products are >95%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of nano material preparation, and relates to a seedless preparation method of gold nanorods. According to the method and on the basis of a traditional seedless method, sodium oleate is taken as a second ligand to greatly improve the repetitiveness of the uniformity and synthesis of the gold nanorods. By means of the method, the prepared gold nanorods are uniform in size and narrow in half band width, longitudinal plasmon resonance absorption is adjustable within the range of 700 nm-1150 nm, and the gold nanorods can be applied to the fields of photoacoustic imaging, optothermal treatment, chemical sensors and the like, the method has the advantages of easy operation, short period, high controllability and the like, and the method is an ideal method for rapidly synthesizing the gold nanorods.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanomaterials, and in particular relates to a seedless preparation method of gold nanorods, in particular to a method for preparing gold nanorods in a water phase in one step without using a seed solution. Background technique [0002] Gold nanomaterials not only have the stability and chemical inertness of gold, a precious metal material, but also have very rich physical and chemical properties. Gold nanomaterials have very rich structures, including gold nanorods, gold nanostars, gold nanosheets, gold nanocages, etc. The most widely studied of these are gold nanorods. Because of its relatively simple synthesis, high yield, and adjustable absorption wavelength, it has great application prospects in biological detection and biological imaging. [0003] Gold nanorods have two surface plasmon resonance absorptions, longitudinal surface plasmon resonance and transverse surface plasmon resona...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 范曲立陆峰贡祎张凯威程锋黄维
Owner NANJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com