Peter James Hull

Uniform GaAs quantum dots in a polymer matrix

A novel technique suitable for the preparation of uniformly sized nano‐ and microparticles of a wide range of compound semiconductors embedded in different polymers is described. Optical absorption spectra and high resolution electron micrographs of a new composite material—GaAs quantum dots in a polymer matrix—are presented and are discussed.

Preparation of nanoparticulate CdS films suitable for opto-electronic device applications

Abstract A simple route for preparation of aqueous colloidal solutions of cadmium sulfide nanoparticles with a narrow size distribution, showing a quantum confinement effect (Q-CdS), is described. A combination of the widely-used spin/dip coating techniques was utilised to deposit high optical quality Q-CdS films on indium tin oxide glass; film thickness can be varied from 50 to 200 nm. The results of optical and structural characterisation of the Q-CdS films with photoluminescence, light absorption and high resolution electron microscopy are presented and discussed.