Source:http://linkedlifedata.com/resource/pubmed/id/18578529
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
29
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| pubmed:dateCreated |
2008-7-17
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| pubmed:abstractText |
We investigate the photoconversion of aqueous 8 nm Ag nanocrystal seeds into 70 nm single crystal plate nanoprisms. The process relies on the excitation of Ag surface plasmons. The process requires dioxygen, and the transformation rate is first-order in seed concentration. Although citrate is necessary for the conversion, and is consumed, the transformation rate is independent of citrate concentration. We propose a mechanism that accounts for these features by coupling the oxidative etching of the seed and the subsequent photoreduction of aqueous Ag(+). The reduced Ag deposits onto a Ag prism of specific size that has a cathodic photovoltage resulting from plasmon "hot hole" citrate photo-oxidation. This photovoltage mechanism also explains recent experimental results involving single and dual wavelength irradiation and the core/shell synthesis of Ag layers on Au seeds.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Jul
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| pubmed:issn |
1520-5126
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| pubmed:author | |
| pubmed:issnType |
Electronic
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| pubmed:day |
23
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| pubmed:volume |
130
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
9500-6
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| pubmed:year |
2008
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| pubmed:articleTitle |
Photovoltage mechanism for room light conversion of citrate stabilized silver nanocrystal seeds to large nanoprisms.
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| pubmed:affiliation |
Chemistry Department, Columbia University, New York, New York 10027, USA. xw2130@columbia.edu
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| pubmed:publicationType |
Journal Article
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