Document Detail


Solvent-adaptable silver nanoparticles.
MedLine Citation:
PMID:  15667154     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
A simple and efficient way of obtaining silver nanoparticles that are dispersible both in organic and in aqueous solvents using a single capping agent is described. The silver nanoparticles are initially prepared in water in the presence of aerosol OT [sodium bis(2-ethylhexyl)-sulfosuccinate, AOT]. Thereafter, transfer of the AOT-capped silver nanoparticles to an organic phase is induced by the addition of a small amount of orthophosphoric acid during shaking of the biphasic mixture. The AOT-stabilized silver nanoparticles could be separated out from the organic phase in the form of a powder. The hydrophobic nanoparticles thus prepared are stable and are readily resuspended in a variety of other polar (including water) and nonpolar solvents without further surface treatment. The amphiphatic nature of the silver surface is brought about by a small orientational change in the AOT monolayer on the silver surface in response to the polarity of the solvent.
Authors:
B L V Prasad; Sujatha K Arumugam; Tanushree Bala; Murali Sastry
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  21     ISSN:  0743-7463     ISO Abbreviation:  Langmuir     Publication Date:  2005 Feb 
Date Detail:
Created Date:  2005-01-25     Completed Date:  2006-05-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  United States    
Other Details:
Languages:  eng     Pagination:  822-6     Citation Subset:  -    
Affiliation:
Nanoscience Group, Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India. blvprasad@dalton.ncl.res.in
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