Crystal of Semiconducting Quantum Dots Built on Covalently Bonded T5 [In28Cd6S54]-12: The Largest Supertetrahedral Cluster in Solid State

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• 作者：Weiping Su ; Xiaoying Huang ; Jing Li ; and Huaxiang Fu
• 刊名：Journal of the American Chemical Society
• 出版年：2002
• 出版时间：November 6, 2002
• 年：2002
• 卷：124
• 期：44
• 页码：12944 - 12945
• 全文大小：89K
• 年卷期：v.124,no.44(November 6, 2002)
• ISSN：1520-5126

文摘

Periodic array of nanoparticles is essential for practical applications in optical devices. Periodic dot arrays often exhibit very interesting collective phenomenon. We report a periodic crystal of InCdS pseudo-T5 nanocluster, the largest supertetrahedral cluster found thus far in solid state. Each InCdS cluster behaves like a nanoparticle with the same size. Unlike the array of colloidal dots in which the dot-dot separation is large (~5 nm), the neighboring T5 clusters in [In₂₈Cd₆S₅₄]·[(CH₃)₄N]₁₂[(HSCH₂COOH)₂]_3.5 crystal form a natural point contact by sharing covalently bonded S atoms. Both experimental and theoretical studies show that this crystal is a semiconductor with a band gap of 3.0 eV.