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Title: Aqueous-phase reactions on hollow silica-encapsulated semiconductor nanoheterostructures
Authors: Lian, J.
Xu, Y.
Lin, M.
Chan, Y. 
Issue Date: 30-May-2012
Citation: Lian, J., Xu, Y., Lin, M., Chan, Y. (2012-05-30). Aqueous-phase reactions on hollow silica-encapsulated semiconductor nanoheterostructures. Journal of the American Chemical Society 134 (21) : 8754-8757. ScholarBank@NUS Repository.
Abstract: We introduce a facile and robust methodology for the aggregation-free aqueous-phase synthesis of hierarchically complex metal-semiconductor heterostructures. By encapsulating semiconductor nanostructures within a porous SiO 2 shell with a hollow interior, we can isolate each individual particle while allowing it access to metal precursors for subsequent metal growth. We illustrate this by Pt deposition on CdSe-seeded CdS tetrapods, which we found to be facilitated via the surprising formation of a thin interfacial layer of PtS coated onto the original CdS surface. We took advantage of this unique architecture to perform cation exchange reactions with Ag + and Pd 2+, thus demonstrating the feasibility of achieving such transformations in complex metal-semiconductor nanoparticle systems. © 2012 American Chemical Society.
Source Title: Journal of the American Chemical Society
ISSN: 00027863
DOI: 10.1021/ja301805u
Appears in Collections:Staff Publications

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