Date of Thesis

2011

Thesis Type

Honors Thesis (Bucknell Access Only)

Department

Chemical Engineering

First Advisor

Brandon Vogel

Keywords

Cadmium selenide, Cadmium sulfide, Quantum dots

Abstract

The addition of a ZnS shell to CdSe and CdS quantum dot cores was explored using various methods. Spectrophotometry was used to assess the success of ZnS overcoating, which produces both an increase in overall fluorescence and decrease in particle size distribution. A new method was developed, involving preheating of the zinc and sulfide precursor solutions, resulting in CdSe(ZnS) particles with improved fluorescence and a more uniform shell coating from oleylamine-capped CdSe core particles.

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