Please use this identifier to cite or link to this item: https://doi.org/10.1021/cm300161m
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dc.titleUnusual selectivity of metal deposition on tapered semiconductor nanostructures
dc.contributor.authorMishra, N.
dc.contributor.authorLian, J.
dc.contributor.authorChakrabortty, S.
dc.contributor.authorLin, M.
dc.contributor.authorChan, Y.
dc.date.accessioned2014-10-16T08:47:10Z
dc.date.available2014-10-16T08:47:10Z
dc.date.issued2012-06-12
dc.identifier.citationMishra, N., Lian, J., Chakrabortty, S., Lin, M., Chan, Y. (2012-06-12). Unusual selectivity of metal deposition on tapered semiconductor nanostructures. Chemistry of Materials 24 (11) : 2040-2046. ScholarBank@NUS Repository. https://doi.org/10.1021/cm300161m
dc.identifier.issn08974756
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/95383
dc.description.abstractWe describe a surfactant-driven method to synthesize highly monodisperse CdSe-seeded CdS nanoheterostructures with conelike, tapered geometries in order to examine the effects of shape on the location-specific deposition of Au under ambient conditions. Although preferential metal deposition at surface defect sites are generally expected, we found suprisingly that Au growth at the side facets of tapered linear and branched structures was significantly suppressed. Further investigation revealed this to be due to a highly efficient electrochemical Ostwald ripening process which was previously thought not to occur in branched nanostructures such as tetrapods. We exploited this phenomenon to fabricate uniform asymmetrically tipped CdSe-seeded CdS tetrapods with conelike arms, where a solitary large Au tip is found on one of the arms while the other three arms bear Ag 2S tips. Importantly, this work presents a synthetic route toward the selective deposition of metals onto branched semiconductor nanostructures whose arms have nearly symmetric reactivity. © 2012 American Chemical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/cm300161m
dc.sourceScopus
dc.subjectgold
dc.subjectmetal-semiconductor
dc.subjectnanorods
dc.subjectOstwald ripening
dc.subjecttetrapods
dc.typeArticle
dc.contributor.departmentCHEMISTRY
dc.description.doi10.1021/cm300161m
dc.description.sourcetitleChemistry of Materials
dc.description.volume24
dc.description.issue11
dc.description.page2040-2046
dc.description.codenCMATE
dc.identifier.isiut000305092600009
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