Positionally defined, binary semiconductor nanoparticles synthesized by scanning probe block copolymer lithography

Louise R. Giam, Shu He, Noah E. Horwitz, Daniel J. Eichelsdoerfer, Jinan Chai, Zijian Zheng, Dongwoo Kim, Wooyoung Shim, Chad A. Mirkin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)

Abstract

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 Cd 2+, which is defined by the feature volume. When they are subsequently reacted in H 2S 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.
Original languageEnglish
Pages (from-to)1022-1025
Number of pages4
JournalNano Letters
Volume12
Issue number2
DOIs
Publication statusPublished - 8 Feb 2012
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

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