19801754

Source:http://linkedlifedata.com/resource/pubmed/id/19801754

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0205171, umls-concept:C0205431, umls-concept:C0237401, umls-concept:C1521761, umls-concept:C1521990, umls-concept:C1627358, umls-concept:C1720804, umls-concept:C1721063, umls-concept:C2349975
pubmed:issue	43
pubmed:dateCreated	2009-10-6
pubmed:abstractText	This paper describes a systematic study of the surface-enhanced Raman scattering (SERS) activity of hot spots formed between a Ag nanowire and a Ag nanocube with sharp corners. We investigated two distinct dimer structures: (i) a nanocube having one side face nearly touching the side face of a nanowire, and (ii) a nanocube having one edge nearly touching the side face of a nanowire. The field enhancements for the dimers displayed a strong dependence on laser polarization, and the strongest SERS intensities were observed for polarization along the hot-spot axis. Moreover, the detected SERS intensities were dependent on the hot-spot structure, i.e., the relative orientation of the Ag nanocube with respect to the nanowire's side face. When the dimer had a face-to-face configuration, the enhancement factor EF(dimer) was 1.4 x 10(7). This corresponds to 22-fold and 24-fold increases compared to those for individual Ag nanowires and nanocubes, respectively. Conversely, when the dimer had an edge-to-face configuration, EF(dimer) was 4.3 x 10(6). These results demonstrated that the number of probe molecules adsorbed at the hot spot played an important role in determining the detected SERS intensities. EF(dimer) was maximized when the dimer configuration allowed for a larger number of probe molecules to be trapped within the hot-spot region.
pubmed:grant	http://linkedlifedata.com/resource/pubmed/grant/DP1 OD000798
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/101241272
pubmed:status	PubMed-not-MEDLINE
pubmed:month	Oct
pubmed:issn	1361-6528
pubmed:author	pubmed-author:CamargoPedro H CPH, pubmed-author:CobleyClaire MCM, pubmed-author:RycengaMatthewM, pubmed-author:XiaYounanY
pubmed:issnType	Electronic
pubmed:day	28
pubmed:volume	20
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	434020
pubmed:dateRevised	2011-6-30
pubmed:year	2009
pubmed:articleTitle	Measuring the surface-enhanced Raman scattering enhancement factors of hot spots formed between an individual Ag nanowire and a single Ag nanocube.
pubmed:affiliation	Department of Biomedical Engineering, Washington University, St Louis, MO 63130, USA.
pubmed:publicationType	Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural