Abstract
Optical absorption and photoluminescence (PL) properties of colloidal TiO2 nanotubes, produced by the alkali hydrothermal method, were studied at room temp. in the range 300-700 nm. Nanotubes having an internal diam. 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 nanotubes. [on SciFinder (R)]
Original language | English |
---|---|
Pages (from-to) | 8565-8569 |
Number of pages | 5 |
Journal | Journal of Physical Chemistry B |
Volume | 109 |
Issue number | 18 |
DOIs | |
Publication status | Published - 2005 |
Bibliographical note
ID number: ISI:000228982900008Keywords
- Luminescence (diam.-dependent
- Nanotubes
- Photoexcitation (luminescence excitation
- titanium oxide nanotube absorption photoluminescence diam size effect
- Band structure
- Quantum size effect (nanotube diam.
- of TiO2 nanotubes)
- Optical absorption (apparent two-dimensional behavior of TiO2 nanotubes revealed by light absorption and luminescence)
- UV and visible spectra (absorption
- Surface structure (of TiO2 nanotubes)
- apparent two-dimensional behavior of TiO2 nanotubes revealed by light absorption and luminescence)