Abstract
Densely assembled TiO2 nanorods with a diameter of 150-200nm and a length of several micrometers have been synthesized by a heating-sol-gel template process. The obtained nanorods were characterized to be single anatase-phase by X-ray diffraction. Transmission electron microscopy image revealed that the nanorods were the aggregate of many nanocrystallites with ∼10nm in diameter and indistinct polygonal shape. Selected-area electron diffraction and energy dispersive X-ray spectroscopy results confirmed that the obtained nanorods were anatase-phase with good compositional uniformity and fine crystallinity in the entire length. In addition to the fundamental phonon modes, a weak overtone scattering (B1g) at 801cm-1 was found in Raman scattering study which is usually observed in nano-sized materials. A new process named heating-sol-gel template process for fabrication oxide nanorods with large quantity, good compositional uniformity and fine crystallinity based on a template method was proposed and the above characterization results support the new process is a desirable process.
Original language | English |
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Pages (from-to) | 246-252 |
Number of pages | 7 |
Journal | Journal of Crystal Growth |
Volume | 264 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 2004 Mar 15 |
Externally published | Yes |
Keywords
- A1. Nanophase materials
- A2. Heating-sol-gel template process
- B1. Titanium dioxide
- B2. Optical functional materials
ASJC Scopus subject areas
- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry