| Start Date: | 1/16/2014 | Start Time: | 4:30 PM |
| End Date: | 1/16/2014 | End Time: | 6:00 PM |
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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.
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Location:
Disque Hall, Room 109, 32 South 32nd Street, Philadelphia, PA 19135 |
Audience:
AlumniCurrent StudentsFacultyParents & FamiliesProspective StudentsPublicStaff |
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