| Autor: |
Hong Pan, Jia, Yong Chai, Seung, Lee, Chongmu, Park, Sang-Eon, In Lee, Wan |
| Zdroj: |
The Journal of Physical Chemistry - Part C; April 2007, Vol. 111 Issue: 15 p5582-5587, 6p |
| Abstrakt: |
Highly organized and crystallized cubic and hexagonal mesoporous SnO2thin films were selectively synthesized via an evaporation-induced self-assembly (EISA) process with SnCl4as the precursor and a triblock copolymer (pluronic F127) as the template. The as-spin-coated films were treated in two separate aging steps. Initial aging in a relative humidity (RH) of 75−85% at 25 °C was essential for obtaining the transparent and highly organized mesoporous films. The introduction of 1-BuOH instead of EtOH in the Sn−sol solution induced the formation of a robust hexagonal mesophase. X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and UV−visible spectroscopy revealed the mesopore structures of the SnO2thin films to be periodically organized with uniform surfaces, highly crystallized in the cassiterite phase, and thermally stable up to 600 °C. The optical transparencies were greater than 97% in the visible-light range. The sheet resistances of the prepared cubic and hexagonal mesoporous SnO2thin films were also analyzed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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