期刊
APPLIED PHYSICS LETTERS
卷 93, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3005557
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资金
- Ministry of Science and Technology of Korea
- General Motors RD Center
Monodispersed iron-oxide nanocrystals of controlled sizes (5-16 nm) were prepared by the thermal decomposition of iron-oleate complex to fabricate photoanode films for photoelectrochemical oxidation of water under simulated solar light. The smallest 5 nm particles were made mostly of gamma-Fe2O3, but other sizes showed mixed phases with Fe3O4, whose fraction increased with size. Size-dependent photoanodic currents were also observed, showing maximum photocurrent density for 12 nm particles. The high photocurrents were attributed to the lowered electron-hole recombination rates for the nanocrystals with the sizes comparable to the hole diffusion length. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.3005557]
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