NDLI: Raman enhancement of rhodamine adsorbed on Ag nanoparticles self-assembled into nanowire-like arrays.

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Raman enhancement of rhodamine adsorbed on Ag nanoparticles self-assembled into nanowire-like arrays.

Content Provider	Europe PMC
Author	Panagopoulou, Marianthi Pantiskos, Nikolaos Photopoulos, Panos Tang, Jun Tsoukalas, Dimitris Raptis, Yannis S
Copyright Year	2011
Abstract	This work reports on Raman scattering of rhodamine (R6G) molecules absorbed on either randomly distributed or grating-like arrays of approximately 8-nm Ag nanoparticles developed by inert gas aggregation. Optimal growth and surface-enhanced Raman scattering (SERS) parameters have been obtained for the randomly distributed nanoparticles, while effects related to the aging of the silver nanoparticles were studied. Grating-like arrays of nanoparticles have been fabricated using line arrays templates formed either by fracture-induced structuring or by standard lithographic techniques. Grating structures fabricated by both methods exhibit an enhancement of the SERS signal, in comparison to the corresponding signal from randomly distributed Ag nanoparticles, as well as a preferential enhancement in the areas of the sharp features, and a dependence on the polarization direction of the incident exciting laser beam, with respect to the orientation of the gratings structuring. The observed spectroscopic features are consistent with a line-arrangement of hot-spots due to the self- alignment of metallic nanoparticles, induced by the grating-like templates.
ISSN	19317573
Journal	Nanoscale Research Letters
Volume Number	6
PubMed Central reference number	PMC3278473
Issue Number	1
PubMed reference number	22168792
e-ISSN	1556276X
DOI	10.1186/1556-276x-6-629
Language	English
Publisher	Springer
Publisher Date	2011-12-14
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 ©2011 Panagopoulou et al; licensee Springer.
Subject Keyword	SERS self-aligned silver nanoparticles R6G Raman spectra nanotechnology (design-applications)
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Condensed Matter Physics Materials Science

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