Energy-Induced Morphology Changes in Bismuth Nanotubes
| Autor: | Salim Derrouiche, Codruta Zoican Loebick, Lisa D. Pfefferle, Chuan Wang |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Nanotube
Materials science chemistry.chemical_element Nanotechnology Hydrothermal circulation Surfaces Coatings and Films Electronic Optical and Magnetic Materials Bismuth symbols.namesake Sodium borohydride chemistry.chemical_compound General Energy chemistry Chemical engineering Transmission electron microscopy Phase (matter) symbols Physical and Theoretical Chemistry Raman spectroscopy High-resolution transmission electron microscopy |
| Zdroj: | The Journal of Physical Chemistry C. 114:4336-4339 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp911039j |
| Popis: | Different synthesis procedures including hydrothermal, solvothermal, and chemical reduction routes have been previously developed by our group for the production of bismuth nanotubes (BiNTs). It has been shown that a post synthesis treatment with sodium borohydride greatly improves nanotube structure and yield. High-resolution transmission electron microscopy (HRTEM) and Raman spectroscopy were employed to characterize the bismuth nanotubes. Bismuth has a low melting point and this contributes to energy induced structural changes during in situ TEM and Raman observations. Here, HRTEM and Raman techniques were employed to characterize the products and to gain more insight by using in situ observation of an energy-induced morphology change (EiMC) of the bismuth nanotubes. It is shown that the change of the morphology of the bismuth nanotubes is accompanied by (a) an oxidation process (Bi° → Bi3+) and (b) a progressive rhombohedral-Bi → β-Bi2O3 → α-Bi2O3 phase transformation. |
| Databáze: | OpenAIRE |
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