Two-Dimensional Growth of CdSe Nanocrystals, from Nanoplatelets to Nanosheets
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- 作者：C茅cile Bouet ; Benoit Mahler ; Brice Nadal ; Benjamin Abecassis ; Mickael D. Tessier ; Sandrine Ithurria ; Xiangzhen Xu ; Benoit Dubertret
- 刊名：Chemistry of Materials
- 出版年：2013
- 出版时间：February 26, 2013
- 年：2013
- 卷：25
- 期：4
- 页码：639-645
- 全文大小：388K
- 年卷期：v.25,no.4(February 26, 2013)
- ISSN：1520-5002
文摘
We report the continuous lateral extension of cadmium selenide nanoplatelets into nanosheets using continuous injection of precursors at high temperature. We show that we can obtain CdSe nanosheets with lateral dimensions up to 700 nm and a well-defined thickness that can be tuned with atomic precision. When the nanosheets鈥?lateral size increases, they roll on themselves to form nanoscrolls that can unroll upon surface modification. The final geometry of the nanosheets can be tuned to different morphologies using precursors that favor the growth of specific crystal facets. We provide a detailed study of the CdSe nanosheets growth and its optimization for three different thicknesses.