Resistivity hysteresis of Ag2S nanocomposites

Sourish Banerjee, Santanu Bhattacharya, Dipankar Chakravorty

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

A low-temperature chemical synthesis route was used to prepare Ag 2S particles with diameters ranging from 3 to 39 nm within a silica matrix. The dc electrical resistivity was measured in the temperature range of 320-460 K. A drastic reduction in resistivity around 450 K was caused by an order-disorder transition of Ag2S. The specimens exhibited a hysteresis in resistivity as a function of temperature. The width of the hysteresis was related to the particle size, viz., it increased with an increase in particle size. This is believed to arise due to a reduction in interfacial free energy for crystal formation in the cation sublattice for smaller Ag 2S particle sizes.

Original languageEnglish (US)
Pages (from-to)13410-13413
Number of pages4
JournalJournal of Physical Chemistry C
Volume111
Issue number36
DOIs
StatePublished - Sep 13 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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