NDLI: SERS substrates formed by gold nanorods deposited on colloidal silica films.

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SERS substrates formed by gold nanorods deposited on colloidal silica films.

Content Provider	Europe PMC
Author	Tsvetkov, Mikhail Yu Khlebtsov, Boris N Khanadeev, Vitaly A Bagratashvili, Victor N Timashev, Peter S Samoylovich, Mikhail I Khlebtsov, Nikolai G
Copyright Year	2013
Abstract	We describe a new approach to the fabrication of surface-enhanced Raman scattering (SERS) substrates using gold nanorod (GNR) nanopowders to prepare concentrated GNR sols, followed by their deposition on an opal-like photonic crystal (OPC) film formed on a silicon wafer. For comparative experiments, we also prepared GNR assemblies on plain silicon wafers. GNR-OPC substrates combine the increased specific surface, owing to the multilayer silicon nanosphere structure, and various spatial GNR configurations, including those with possible plasmonic hot spots. We demonstrate here the existence of the optimal OPC thickness and GNR deposition density for the maximal SERS effect. All other things being equal, the analytical integral SERS enhancement of the GNR-OPC substrates is higher than that of the thick, randomly oriented GNR assemblies on plain silicon wafers. Several ways to further optimize the strategy suggested are discussed.
ISSN	19317573
Journal	Nanoscale Research Letters
Volume Number	8
PubMed Central reference number	PMC3664605
Issue Number	1
PubMed reference number	23697339
e-ISSN	1556276X
DOI	10.1186/1556-276x-8-250
Language	English
Publisher	Springer
Publisher Date	2013-05-22
Access Restriction	Open
Rights License	This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright ©2013 Tsvetkov et al.; licensee Springer.
Subject Keyword	SERS Gold nanorod Silica nanosphere Plasmonic nanopowder Rhodamine 6G
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Condensed Matter Physics Materials Science

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