In2S3 Micropompons and Their Conversion to In2O3 Nanobipyramids: Simple Synthesis Approaches and Characterization
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- 作者：Anuja Datta ; Subhendu K. Panda ; Dibyendu Ganguli ; Pratima Mishra ; and ; Subhadra Chaudhuri
- 刊名：Crystal Growth & Design
- 出版年：2007
- 出版时间：January 2007
- 年：2007
- 卷：7
- 期：1
- 页码：163 - 169
- 全文大小：722K
- 年卷期：v.7,no.1(January 2007)
- ISSN：1528-7505
文摘
In2S3 micropompons composed of randomly oriented flakes of ~10 nm thickness were synthesized in high yield bya facile hydrothermal process. When the product was thermally oxidized at 600 
C, single crystalline well-faceted body-centeredcubic (bcc) In2O3 bipyramids of sizes between 50 and 300 nm were obtained. It was proposed that the growth of the In2S3 nanoflakeswas initially controlled by the Ostwald ripening process, and finally the aggregation of the flakes led to the development of themicropompons. The growth of the In2O3 bipyramids from the In2S3 micropompons started with the formation of In2O3 nulclei at thesurface of the micropompons causing the destruction of the flakelike structure to produce In2O3 bipyramids. The micropomponsshowed good optical properties due to a strong quantum confinement effect. In2O3 bipyramids showed near-band-edge (NBE) UVemission, which was mainly attributed to the high crystal quality of the bipyramids. The study may provide guidance for the morphologycontrollable synthesis of different nanostructures and may help in exploring the crystal growth process.
C, single crystalline well-faceted body-centeredcubic (bcc) In2O3 bipyramids of sizes between 50 and 300 nm were obtained. It was proposed that the growth of the In2S3 nanoflakeswas initially controlled by the Ostwald ripening process, and finally the aggregation of the flakes led to the development of themicropompons. The growth of the In2O3 bipyramids from the In2S3 micropompons started with the formation of In2O3 nulclei at thesurface of the micropompons causing the destruction of the flakelike structure to produce In2O3 bipyramids. The micropomponsshowed good optical properties due to a strong quantum confinement effect. In2O3 bipyramids showed near-band-edge (NBE) UVemission, which was mainly attributed to the high crystal quality of the bipyramids. The study may provide guidance for the morphologycontrollable synthesis of different nanostructures and may help in exploring the crystal growth process.