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Resistivity measurements of Mo 6 S 3 I 6 nanowire networks
Author(s) -
Berčič B.,
Pirnat U.,
Kusar P.,
Dvorsek D.,
Vengust D.,
Mihailovic D.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200669203
Subject(s) - electrical resistivity and conductivity , annealing (glass) , conductivity , nanowire , materials science , analytical chemistry (journal) , condensed matter physics , chemistry , nanotechnology , physics , composite material , quantum mechanics , chromatography
We present measurements of resistivity on Mo 6 S 3 I 6 nanowire networks as a function of temperature, moisture and high‐temperature processing conditions. The room‐temperature conductivity of as‐grown material is s 300 K ∼ 0.04 S/m with a linear I – V characteristic. The temperature dependence of conductivity of pristine samples closely follows the expression s = s 0 exp (– T 0 / T ) b , where b = 1/4. Removal of interstitial iodine from the network by annealing in vacuum gives rise to a cross‐over to b = 1/2 and an increase in conductivity. Different scenarios for observed cross‐over are discussed. The introduction of water vapour leads to a decrease in conductivity and reveals that the resistivity of the network is sensitive to interstitial water molecules, which is interesting for potential chemical sensor applications. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)