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Seminar: Bringing Down the Barriers to Electron Transport in Strongly Coupled Nanocrystal Arrays
Start Date: 1/16/2014Start Time: 4:30 PM
End Date: 1/16/2014End Time: 6:00 PM
Event Description
Aaron Fafarman, PhD, assistant professor of chemical engineering, Drexel University

 

Title: Bringing Down the Barriers to Electron Transport in Strongly Coupled Nanocrystal Arrays 

Abstract: Ammonium thiocyanate is a compact surface ligand for colloidal semiconducting and metallic nanocrystals. In the solid state, particles capped with this ligand achieve close interparticle separation and strong electronic coupling. In arrays of thiocyanate-capped semiconductor nanocrystals, optical and electronic measurements suggest that the boundaries between nanocrystals become nearly transparent to electrons. As a consequence, for example, in metallic nanocrystal-films, the conductivity approaches bulk values. Additionally, this compact ligand, which leaves the nanocrystal-surface nearly bare, provides new opportunities to measure and manipulate the chemical composition of the nanocrystal surface. Technological applications will be presented including semiconducting optoelectronic devices and plasmonic optical metamaterials. 
 
Location:
Disque Hall, Room 109, 32 South 32nd Street, Philadelphia, PA 19135
Audience:
  • Alumni
  • Current Students
  • Faculty
  • Parents & Families
  • Prospective Students
  • Public
  • Staff
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