2016年3月
Formation of pseudomorphic nanocages from Cu2O nanocrystals through anion exchange reactions
SCIENCE
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- 巻
- 351
- 号
- 6279
- 開始ページ
- 1306
- 終了ページ
- 1310
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1126/science.aad5520
- 出版者・発行元
- AMER ASSOC ADVANCEMENT SCIENCE
The crystal structure of ionic nanocrystals (NCs) is usually controlled through reaction temperature, according to their phase diagram. We show that when ionic NCs with different shapes, but identical crystal structures, were subjected to anion exchange reactions under ambient conditions, pseudomorphic products with different crystal systems were obtained. The shape-dependent anionic framework (surface anion sublattice and stacking pattern) of Cu2O NCs determined the crystal system of anion-exchanged products of CuxS nanocages. This method enabled us to convert a body-centered cubic lattice into either a face-centered cubic or a hexagonally close-packed lattice to form crystallographically unusual, multiply twinned structures. Subsequent cation exchange reactions produced CdS nanocages while preserving the multiply-twinned structures. A high-temperature stable phase such as wurtzite ZnS was also obtained with this method at ambient conditions.
- リンク情報
- ID情報
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- DOI : 10.1126/science.aad5520
- ISSN : 0036-8075
- eISSN : 1095-9203
- Web of Science ID : WOS:000372397700039