Tilted Face-Centered-Cubic Supercrystals of PbS Nanocubes

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• 作者：Zewei Quan ; Welley Siu Loc ; Cuikun Lin ; Zhiping Luo ; Kaikun Yang ; Yuxuan Wang ; Howard Wang ; Zhongwu Wang ; Jiye Fang
• 刊名：Nano Letters
• 出版年：2012
• 出版时间：August 8, 2012
• 年：2012
• 卷：12
• 期：8
• 页码：4409-4413
• 全文大小：362K
• 年卷期：v.12,no.8(August 8, 2012)
• ISSN：1530-6992

文摘

We demonstrate a direct fabrication of PbS nanocube supercrystals without size-selection pretreatment on the building blocks. Electron microscopic and synchrotron small angle X-ray scattering analyses confirm that nanocubes pack through a tilted face-centered-cubic (fcc) arrangement, that is, face-to-face along the 110_super direction, resulting in a real packing efficiency of as high as 83%. This new type of superstructure consisting of nanocubes as building blocks, reported here for the first time, is considered the most stable surfactant-capped nanocube superstructure determined by far.

Keywords:

Self-assembly; PbS nanocubes; tilted face-centered-cubic; supercrystal; synchrotron X-ray scattering