| Autor: |
Sander, M. S., Gronsky, R., Sands, T., Stacy, A. M. |
| Zdroj: |
Chemistry of Materials; January 2003, Vol. 15 Issue: 1 p335-339, 5p |
| Abstrakt: |
Arrays of bismuth telluride (Bi2Te3) nanowires with diameters of ~25, ~50, and ~75 nm have been produced by electrochemical deposition into porous anodic alumina templates. Scanning electron microscopy confirms that the nanowire arrays are dense with a narrow distribution of nanowire diameters. The structure of the nanowires was assessed immediately after deposition, after annealing to ~80% of the melting point, and after melting/recrystallization. As determined by XRD analysis, there is strong fiber texture in the arrays that depends on both the nanowire diameter and the postdeposition processing conditions. Bright-field/dark-field imaging and diffraction in the transmission electron microscope reveal that the as-deposited nanowires are polycrystalline with a bamboo-type grain structure that does not change significantly upon annealing, and a similar grain structure is obtained after melting and resolidification. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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