Basics of oxygen and SnO2 interaction; work function change and conductivity measurements
2006; Elsevier BV; Volume: 118; Issue: 1-2 Linguagem: Inglês
10.1016/j.snb.2006.04.004
ISSN1873-3077
AutoresT. Sahm, Aleksander Gurlo, Nicolae Bârsan, Udo Weimar,
Tópico(s)Transition Metal Oxide Nanomaterials
ResumoThe interaction of oxygen and nanocrystalline SnO2 has been investigated by means of simultaneous work function change and resistance measurements. Various oxygen concentrations between 50 ppm and 6000 ppm have been dosed at two different temperatures. At 400 °C, only ionic species have been identified. However, at 200 °C dipolar species play the major role reflected by a massive decrease in electron affinity.
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