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Synthesis of core and core-shell quantum dots
We are interested in quantum dots based on the cadmium chalcogenide series and their core shell versions. These quantum dots emit in the visible spectrum. We are also looking at quantum dots based on the selenium and lead chalcogenides, which emit in the near infrared spectrum.
Bare cadmium selenide quantum dots are not very stable and therefore are routinely coated with a shell of a higher band gap such as zinc sulfide.
We are working with quantum dots based on cadmium chalcogenides, eg. CdS, CdSe, CdSeS and CdTe, and their core-shell version.
In this part of the research we are optimising the quantum dot fluorescence by changing experimental conditions such as temperature, solvent and compostion. We are also investigating methods of making these quantum dots soluble in aqueous solutions by cojugating them to hydrophilic ligands.
Recently we have become interested in near-infrared emitting quantum dots, such as Sn and Pb chalcogenides.