Surfactant-Directed Synthesis of Branched Bismuth Telluride/Sulfide Core/Shell Nanorods
| Autor: | Makala S. Raghuveer, Raju V. Ramanujan, Theodorian Borca-Tasciuc, Ganapathiraman Ramanath, Huafang Li, Arup Purkayastha, Darshan Gandhi, Zhong W. Liu, Qingyu Yan |
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| Rok vydání: | 2008 |
| Předmět: |
chemistry.chemical_classification
Nanostructure Materials science Sulfide Mechanical Engineering Inorganic chemistry Branching (polymer chemistry) Cadmium telluride photovoltaics chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Desorption General Materials Science Nanorod Bismuth telluride Crystal twinning |
| Zdroj: | Advanced Materials. 20:2679-2683 |
| ISSN: | 1521-4095 0935-9648 |
| DOI: | 10.1002/adma.200702572 |
| Popis: | Here, we demonstrate a new approach to obtain core/shell bismuth telluride/bismuth sulfide nanorods with shell branching by using a biomolecular surfactant, L-glutathionic acid (LGTA). We show that crystallographic twinning of Bi2S3 driven by Bi-LGTA ligand desorption is the primary mechanism of shell branching, which can be controlled by adjusting the LGTA concentration, reaction temperature, and time. Such branched nanostructures and their formation mechanism are different from the nanotetrapod heterostructures of CdSe and CdTe [13‐15] obtained by exploiting lattice mismatch between allotropic polytypes. |
| Databáze: | OpenAIRE |
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