Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 109, Issue 18, Pages 8565-8569Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp050762m
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Optical absorption and photoluminescence (PL) properties of colloidal TiO2 nanombes, produced by the alkali hydrothermal method, were studied at room temperature in the range 300-700 nm. Nanotubes having an internal diameter in the range 2.5-5 nm have very similar optical properties, in contrast to the expected behavior for quasi-1-D systems. This is explained by the complete thermal smearing of all 1-D effects, due to the large effective mass of charge carriers in TiO2, resulting in an apparent 2-D behavior of TiO2 nanombes.
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