seeded-synthesis-of-cdsecds-rod-and-tetrapod-nanocrystals

Seeded Synthesis of CdSe/CdS Rod and Tetrapod Nanocrystals

We demonstrate a method for the synthesis of multicomponent nanostructures consisting of CdS and CdSe with rod and tetrapod morphologies. A seeded ...

UC Berkeley

Lawrence Berkeley National Laboratory

Highly luminescent nanocrystals from removal of impurity atoms residual from ion-exchange synthesis.

We used a fluorogenic reaction to study in conjunction the photocatalytic properties for both active sites (trapped photogenerated electrons and holes) on individual Sb-doped TiO(2) nanorods with single-molecule fluorescence microscopy. It was found that active sites around trapped holes show higher activity, stronger binding ability, and a different dissociation mechanism for the same substrate and product molecules in comparison with the active sites around trapped electrons. These differences could be elucidated by a model involving the charged microenvironments around the active sites.

Probing redox photocatalysis of trapped electrons and holes on single Sb-doped titania nanorod surfaces.

III-V nanocrystals displaying high crystallinity and low size dispersity are difficult to access by direct synthesis from molecular precursors. Here, we demonstrate that cation exchange of cadmium pnictide nanocrystals with group 13 ions yields monodisperse, crystalline III-V nanocrystals, including GaAs, InAs, GaP, and InP. This report highlights the versatility of cation exchange for accessing nanocrystals with covalent lattices.

Article	Year
Highly luminescent nanocrystals from removal of impurity atoms residual from ion-exchange synthesis. Angewandte Chemie (International ed. in English)\| PubMed ID: 22278816	2012
Probing redox photocatalysis of trapped electrons and holes on single Sb-doped titania nanorod surfaces. Journal of the American Chemical Society\| PubMed ID: 22339157	2012
Ion exchange synthesis of III-V nanocrystals. Journal of the American Chemical Society\| PubMed ID: 23190283	2012

Brandon J. Beberwyck

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