Construction of PbSe Hierarchical Superstructures via an Alkaline Etching Method
| Autor: | Jiabing Wei, Shudong Zhang, Kuai Yu, Changzheng Wu, Yi Xie, Zhengcui Wu |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Crystal Growth & Design. 8:2933-2937 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/cg800046s |
| Popis: | Various PbSe hierarchical superstructures, including the PbSe octopod hierarchitectures densely/loosely stacked by cubic building units, and PbSe windowlike hierarchitectures, have been achieved from the PbSe cubes by the alkaline etching methodology. This work indicates that the complicated hierarchical superstructures could also be obtained through a “top-down” way on the basis of an etching process, which is different from the previous opinion that the hierarchitectures could only be assembled by the in situ produced building blocks through the “bottom-up” way. Herein, the in situ synthesized PbSe cubes were etched to form various hierarchical superstructures in the presence or absence of the organic molecule 1,10-phenanthroline (1,10-phen). Without 1,10-phen, PbSe windowlike hierarchitectures could be produced because OH− preferred to attack the {100} faces of PbSe cubes. Meanwhile, densely/loosely stacked PbSe octopod hierarchitectures were obtained with the presence of 1,10-phen, which preferred to ... |
| Databáze: | OpenAIRE |
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