title: Transformation of Ag nanowires into semiconducting AgFeS2 nanowires.
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.
authors: †Center for Nanophotonics, FOM Institute AMOLF, Science Park Amsterdam 104, 1098 XG Amsterdam, The Netherlands.
authors: Beniamino
authors: B
authors: Sciacca
authors: ‡Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands.
authors: Anil O
authors: AO
authors: Yalcin
authors: †Center for Nanophotonics, FOM Institute AMOLF, Science Park Amsterdam 104, 1098 XG Amsterdam, The Netherlands.
authors: Erik C
authors: EC
authors: Garnett