Transformation of Ag Nanowires into Semiconducting AgFeS2 Nanowires

Journal article (2015)

Authors

B Sciacca External organisation
A.O. Yalcin QN/High Resolution Electron Microscopy
EC Garnett External organisation
Research Group
QN/High Resolution Electron Microscopy
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Published Date

2015

Language

English

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Research Group

QN/High Resolution Electron Microscopy

Abstract

We report on the synthesis of semiconducting AgFeS2 nanowires, obtained from the conversion of Ag nanowires. The study of the conversion process shows that the formation of Ag2S nanowires, as an intermediate step, precedes the conversion into AgFeS2 nanowires. The chemical properties of AgFeS2 nanowires were characterized by X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy at intermediate steps of the conversion process and show that the temperature at which the reaction takes place is critical to obtaining nanowires as opposed to nanotubes. Optical measurements on nanowire ensembles confirm the semiconducting nature of AgFeS2, with a direct band gap of 0.88 eV.