| Autor: |
El-Kouedi, M., Foss, C. A., Jr., Bodolosky-Bettis, S. A., Bachman, R. E. |
| Zdroj: |
The Journal of Physical Chemistry - Part B; July 2002, Vol. 106 Issue: 29 p7205-7209, 5p |
| Abstrakt: |
Nanoparticle composite materials composed of AgI nanorods in porous alumina, and Au/AgI heterojunction nanorods, also in alumina, were synthesized via a template synthesis method and characterized using X-ray powder diffraction. The X-ray data suggest that electrodeposition of AgI nanoparticles at room temperature leads to a 50:50 mixture of the zinc blende (cubic) and wurtzite (hexagonal) morphs of AgI. Annealing the samples results in a conversion of cubic AgI to hexagonal AgI. Preliminary texture analysis of the samples suggests that the AgI nanorods are preferentially oriented within the pores of the host matrix such that the c-axis of the hexagonal phase is aligned with the pore axis, resulting in fiber formation. Annealing increases the degree of orientation substantially. Similar analysis of the Au/AgI heterojunction samples reveals that the presence of Au also increases the degree of alignment in as-deposited AgI. This work, which represents the first attempt to perform texture analysis on template-synthesized nanoparticle systems, demonstrates the usefulness of X-ray diffraction for the characterization of nanoparticles and nanorods. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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