Gold nanotriangles biologically synthesized using tamarind leaf extract and potential application in vapor sensing

TitleGold nanotriangles biologically synthesized using tamarind leaf extract and potential application in vapor sensing
Publication TypeJournal Article
Year of Publication2005
AuthorsAnkamwar, B, Chaudhary, M, Sastry, M
JournalSynthesis and Reactivity in Inorganic Metal-Organic and Nano-Metal Chemistry
Volume35
Issue1
Pagination19-26
Date PublishedFEB
Type of ArticleArticle
ISSN1553-3174
KeywordsBiosynthesis, gold nanotriangles, tamarind leaf, vapor sensing
Abstract

The size and shape dependent electronic and chemical properties of metal nanoparticles has drawn the attention of chemists, physicists, biologists, and engineers who wish to use them for the development of new generation nanodevices. In this article, we report the synthesis of gold nanotriangles using tamarind leaf extract as the reducing agent. On treating aqueous chloroauric acid solution with tamarind leaf extract, rapid reduction of the chloroaurate ions is observed leading to the formation of flat and thin single crystalline gold nanotriangles. Atomic force microscopy analysis of the gold nanotriangles indicated that they ranged in thickness from 20 to 40 nm. These gold nanotriangles with unique and highly anisotropic planer shapes might find application in photonics, optoelectronics, and optical sensing. We investigated the effect of different organic solvent vapors like methanol, benzene and acetone on the conductivity of tamarind leaf extract reduced gold nanotriangles. I-V characteristics measurement of these nanotriangles was done in presence of these organic solvent vapors. The observed characteristics suggest the application of gold nanotriangles to future chemical sensors.

DOI10.1081/SIM-200047527
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)0.493
Divison category: 
Physical and Materials Chemistry