Photophysical characteristics of capped and uncapped CdS particles have been investigated in aqueous solution. It is seen that the fluorescence spectrum shifts towards lower energies in the presence of toluene dithiol (TDT) and dimercaptophthalic acid (DMPA). This shift, which is due to quenching of shallow traps, is more predominant with TDT. Also, the presence of excess Cd2+ ions at the surface of the CdS particles facilitates the binding of dithiolenes.
Research on Chemical Intermediates – Springer Journals
Published: Apr 28, 2009
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