A scanning tunneling microscopy and spectroscopy (STM/STS) study of nanocryst. SnO2 at room temp., and under std. sensing conditions at 120 is presented. STS data indicate that the electronic surface properties change with nanoparticle size, temp., and exposure to gas. The surface d. of states in the band gap is shown to increase with temp. while CO exposures induce a large drop in the d. of band gap states as the CO mols. react with chemisorbed oxygen species.
Room temperature and elevated temperature characterization of nanocrystalline SnO2 surfaces by scanning tunneling microscopy and spectroscopy.
MALAGU', Cesare;MARTINELLI, Giuliano;
2004
Abstract
A scanning tunneling microscopy and spectroscopy (STM/STS) study of nanocryst. SnO2 at room temp., and under std. sensing conditions at 120 is presented. STS data indicate that the electronic surface properties change with nanoparticle size, temp., and exposure to gas. The surface d. of states in the band gap is shown to increase with temp. while CO exposures induce a large drop in the d. of band gap states as the CO mols. react with chemisorbed oxygen species.File in questo prodotto:
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