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How Far Can We Probe by SERS?

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dc.contributor.author Kumari, Gayatri
dc.contributor.author Kandula, Jyothirmayee
dc.contributor.author Narayana, Chandrabhas
dc.date.accessioned 2016-10-18T04:48:44Z
dc.date.available 2016-10-18T04:48:44Z
dc.date.issued 2015
dc.identifier.citation Journal of Physical Chemistry C en_US
dc.identifier.citation 119 en_US
dc.identifier.citation 34 en_US
dc.identifier.citation Kumari, G.; Kandula, J.; Narayana, C., How Far Can We Probe by SERS? Journal of Physical Chemistry C 2015, 119 (34), 20057-20064. en_US
dc.identifier.issn 1932-7447
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/1871
dc.description Restricted access en_US
dc.description.abstract Surface-enhanced Raman spectroscopy (SERS) has gained paramount importance in the recent past due to its widespread applications in biodetection, monitoring chemical reactions, small molecule protein interactions, etc. It is believed that SERS is a distance-dependent phenomenon and is effective within 1 nm from the nanoparticle surface. In this work, we have investigated this distance dependence of SERS as a function of nanoparticle size. Earlier attempts have made use of flexible separators, like DNA and chemical molecules, between nanoparticle and analyte to vary the distance. We have used silica coating to vary the distance, without ambiguity, of the analyte from the silver nanopartide surface. Our results suggest that SERS is observed up to a distance of 1 nm for 20 nm silver nanopartides juxtaposed to 5 nm in the case of 90 nm silver nanopartides. This is due to large scattering cross sections and increased radiative damping in the case of the larger nanopartides. This study gives direct correlation between the size of nanopartides and distance probed through SERS which would aid in designing nanoparticle system for various applications and analytes in the future. en_US
dc.description.uri http://dx.doi.org/10.1021/acs.jpcc.5b07556 en_US
dc.language English en
dc.language.iso English en_US
dc.publisher American Chemical Society en_US
dc.rights ?American Chemical Society, 2015 en_US
dc.subject Physical Chemistry en_US
dc.subject Nanoscience & Nanotechnology en_US
dc.subject Materials Science en_US
dc.subject Surface-Enhanced Raman en_US
dc.subject Single-Molecule en_US
dc.subject Gold Nanoparticles en_US
dc.subject Chemical-Reactions en_US
dc.subject Hot-Spots en_US
dc.subject Spectroscopy en_US
dc.subject Scattering en_US
dc.subject Silver en_US
dc.subject Size en_US
dc.subject Simulation en_US
dc.title How Far Can We Probe by SERS? en_US
dc.type Article en_US


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