Solvent-adaptable silver nanoparticles

B. L.V. Prasad, Sujatha K. Arumugam, Tanushree Bala, Murali Sastry

Research output: Contribution to journalArticleResearchpeer-review

52 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)822-826
Number of pages5
JournalLangmuir
Volume21
Issue number3
DOIs
Publication statusPublished - 1 Feb 2005
Externally publishedYes

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