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Title page for ETD etd-10172006-134809


Type of Document Dissertation
Author Swafford, Laura Anderson
URN etd-10172006-134809
Title Homogeneously Alloyed Cadmium Sulfoselenide Nanocrystals
Degree PhD
Department Chemistry
Advisory Committee
Advisor Name Title
Sandra J. Rosenthal Committee Chair
Charles M. Lukehart Committee Member
David E. Cliffel Committee Member
Leonard. C. Feldman Committee Member
Norman H. Tolk Committee Member
Keywords
  • nanocrystal
  • alloy
  • bowing
  • semiconductor
  • photovoltaics
  • transmission electron microscopy
  • Rutherford backscattering
  • TEM
  • RBS
  • cadmium sulfide
  • quantum dot
  • CdSe
  • CdS
  • cadmium selenide
  • Semiconductor nanocrystals -- Synthesis
  • Cadmium alloys
Date of Defense 2006-10-10
Availability unrestricted
Abstract
Alloy nanocrystals provide an additional degree of freedom in selecting desirable properties for nanoscale engineering because their physical and optical properties depend on both size and composition. This dissertation details the pyrolytic synthesis of homogeneously alloyed CdS(x)Se(1-x) nanocrystals in all proportions. The nanocrystals are characterized using UV-visible absorption spectroscopy, transmission electron microscopy, X-ray diffractrometry, and Rutherford backscattering spectrometry to determine precisely structure, size, and composition. The dependence of band gap on nanocrystal size and composition is elucidated, yielding a bowing constant of 0.29, in agreement with bulk values.
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