Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/1880
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dc.contributor.authorSharvani, S.
dc.contributor.authorUpadhayaya, Kishor
dc.contributor.authorKumari, Gayatri
dc.contributor.authorNarayana, Chandrabhas
dc.contributor.authorShivaprasad, S. M.
dc.date.accessioned2016-10-18T04:48:45Z-
dc.date.available2016-10-18T04:48:45Z-
dc.date.issued2015
dc.identifier.citationNanotechnologyen_US
dc.identifier.citation26en_US
dc.identifier.citation46en_US
dc.identifier.citationSharvani, S.; Upadhayaya, K.; Kumari, G.; Narayana, C.; Shivaprasad, S. M., Nano-morphology induced additional surface plasmon resonance enhancement of SERS sensitivity in Ag/GaN nanowall network. Nanotechnology 2015, 26 (46), 7.en_US
dc.identifier.issn0957-4484
dc.identifier.urihttp://hdl.handle.net/10572/1880-
dc.descriptionRestricted accessen_US
dc.description.abstractThe GaN nanowall network, formed by opening the screw dislocations by kinetically controlled MBE growth, possesses a large surface and high conductivity. Sharp apexed nanowalls show higher surface electron concentration in the band-tail states, in comparison to blunt apexed nanowalls. Uncapped silver nanoparticles are vapor deposited on the blunt and sharp GaN nanowall networks to study the morphological dependence of band-edge plasmon-coupling. Surface enhanced Raman spectroscopy studies performed with a rhodamine 6G analyte on these two configurations clearly show that the sharp nanowall morphology with smaller Ag nanoparticles shows higher enhancement of the Raman signal. A very large enhancement factor of 2.8 x 10(7) and a very low limit of detection of 10(-10) M is observed, which is attributed to the surface plasmon resonance owing to the high surface electron concentration on the GaN nanowall in addition to that of the Ag nanoparticles. The significantly higher sensitivity with same-sized Ag nanoparticles confirms the unconventional role of morphology-dependent surface charge carrier concentration of GaN nanowalls in the enhancement of Raman signals.en_US
dc.description.uri1361-6528en_US
dc.description.urihttp://dx.doi.org/10.1088/0957-4484/26/46/465701en_US
dc.languageEnglishen
dc.language.isoEnglishen_US
dc.publisherIOP Publishing Ltden_US
dc.rights?IOP Publishing Ltd, 2015en_US
dc.subjectNanoscience & Nanotechnologyen_US
dc.subjectMaterials Scienceen_US
dc.subjectApplied Physicsen_US
dc.subjectGaNen_US
dc.subjectSERSen_US
dc.subjectAg nanoparticlesen_US
dc.subjectRaman-Spectroscopyen_US
dc.subjectNanoparticlesen_US
dc.subjectScatteringen_US
dc.subjectShapeen_US
dc.subjectSizeen_US
dc.subjectAbsorptionen_US
dc.subjectSubstrateen_US
dc.subjectFilmsen_US
dc.titleNano-morphology induced additional surface plasmon resonance enhancement of SERS sensitivity in Ag/GaN nanowall networken_US
dc.typeArticleen_US
Appears in Collections:Research Articles (Chandrabhas N.)

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