Positionally Defined, Binary Semiconductor Nanoparticles Synthesized by Scanning Probe Block Copolymer Lithography

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• 作者：Louise R. Giam ; Shu He ; Noah E. Horwitz ; Daniel J. Eichelsdoerfer ; Jinan Chai ; Zijian Zheng ; Dongwoo Kim ; Wooyoung Shim ; Chad A. Mirkin
• 刊名：Nano Letters
• 出版年：2012
• 出版时间：February 8, 2012
• 年：2012
• 卷：12
• 期：2
• 页码：1022-1025
• 全文大小：324K
• 年卷期：v.12,no.2(February 8, 2012)
• ISSN：1530-6992

文摘

We report the first method for synthesizing binary semiconductor materials by scanning probe block copolymer lithography (SPBCL) in desired locations on a surface. In this work, we utilize SPBCL to create polymer features containing a desired amount of Cd²⁺, which is defined by the feature volume. When they are subsequently reacted in H₂S in the vapor phase, a single CdS nanoparticle is formed in each block copolymer (BCP) feature. The CdS nanoparticles were shown to be both crystalline and luminescent. Importantly, the CdS nanoparticle sizes can be tuned since their diameters depend on the volume of the originally deposited BCP feature.

Keywords:

Scanning probe; lithography; block copolymer; semiconductor; cadmium sulfide nanoparticles