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Title: Direct formation of gold nanoparticles using ultrasound

Abstract

The invention provides a green chemistry, aqueous method to synthesize gold nanoparticles directly from bulk gold sources. The method involves the ultrasonication of bulk gold in water in the presence of an alkythiol species and a quaternary ammonium surfactant. An organic bilayer forms on the surface of the gold which renders it susceptible to material ejection from the violent collapse of cavitation bubbles. This ejected material is stabilized in solution by the formation of an organic bilayer and can be easily separated. It can then be subjected to an aqueous digestive ripening step to give a gold nanoparticle ensemble with a well-defined plasmon resonance. This method is applicable to a number of different sources of bulk gold. The method can be applied to an environmentally important problem; the recovery of gold from electronic waste streams. For example, gold nanoparticles can be extracted directly from the surface of SIM cards, with no prior manipulation of the cards necessary.

Inventors:
; ; ;
Issue Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1600373
Patent Number(s):
10500643
Application Number:
15/484,856
Assignee:
National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Patent File Date: 04/11/2017
Country of Publication:
United States
Language:
English

Citation Formats

Huber, Dale L., Watt, John Daniel, Chavez, Jonathan, and Ammerman, Lauren Marie. Direct formation of gold nanoparticles using ultrasound. United States: N. p., 2019. Web.
Huber, Dale L., Watt, John Daniel, Chavez, Jonathan, & Ammerman, Lauren Marie. Direct formation of gold nanoparticles using ultrasound. United States.
Huber, Dale L., Watt, John Daniel, Chavez, Jonathan, and Ammerman, Lauren Marie. Tue . "Direct formation of gold nanoparticles using ultrasound". United States. https://www.osti.gov/servlets/purl/1600373.
@article{osti_1600373,
title = {Direct formation of gold nanoparticles using ultrasound},
author = {Huber, Dale L. and Watt, John Daniel and Chavez, Jonathan and Ammerman, Lauren Marie},
abstractNote = {The invention provides a green chemistry, aqueous method to synthesize gold nanoparticles directly from bulk gold sources. The method involves the ultrasonication of bulk gold in water in the presence of an alkythiol species and a quaternary ammonium surfactant. An organic bilayer forms on the surface of the gold which renders it susceptible to material ejection from the violent collapse of cavitation bubbles. This ejected material is stabilized in solution by the formation of an organic bilayer and can be easily separated. It can then be subjected to an aqueous digestive ripening step to give a gold nanoparticle ensemble with a well-defined plasmon resonance. This method is applicable to a number of different sources of bulk gold. The method can be applied to an environmentally important problem; the recovery of gold from electronic waste streams. For example, gold nanoparticles can be extracted directly from the surface of SIM cards, with no prior manipulation of the cards necessary.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {12}
}

Patent:

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