Title:
Reactive conversion of polycrystalline SnO2 into single-crystal nanofiber arrays at low oxygen partial pressure
Reactive conversion of polycrystalline SnO2 into single-crystal nanofiber arrays at low oxygen partial pressure
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Carney, Carmen M.
Akbar, Sheikh A.
Cai, Ye
Yoo, Sehoon
Sandhage, Kenneth H.
Akbar, Sheikh A.
Cai, Ye
Yoo, Sehoon
Sandhage, Kenneth H.
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Abstract
Single-crystal SnO₂ nanofibers have been formed from SnO2 polycrystals via reaction at low oxygen partial pressures. Polycrystalline SnO₂ disks coated with Au nanoparticles were exposed to humid H2/N2 at 700 to 800 °C. Single-crystal SnO₂ nanofibers formed beneath Au nanoparticles, with the nanofiber length oriented parallel to the [100] crystallographic direction of SnO₂. Because this simple process does not require either a separate source of a Sn–O-bearing vapor species located upstream of the substrate or a temperature gradient, single-crystal nanofibers may be formed on large area SnO₂-bearing substrates.
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2008-10
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