Raman scattering active substrate

Tsai YC, Hsu PC, Lin YW, Wu TM (2009) Electrochemical deposition of silver nanoparticles in multiwalled carbon nanotube-alumma-coated silica for surface-enhanced Raman scattering-active substrates. Electrochem Commun 11 542-545... 

Muniz-Miranda M (2003) Silver clusters onto nanosized colloidal silica as novel surface-enhanced Raman scattering active substrates. Appl Spectrosc 57 655-660... 

Li XF, Cao MH, Zhang H, Zhou L, Cheng S, Yao JL, Fan LJ (2012) Surface-enhanced Raman scattering-active substrates of electrospun polyvinyl alcohol/gold-sUver nanofibers. J Colloid Interface Sci 382 28-35... 

Hu, J. W., B. Zhao, W. Q. Xu, Y. G. Fan, B. Li, and Y. Ozaki. 2002. Simple method for preparing control-lably aggregated silver particle films used as surface-enhanced Raman scattering active substrates. Langmuir 18 (18) 6839-6844. 

Reilly, T.H., Corbman, J.D. and Rowlen, K.L. (2007) Vapor deposition method for sensitivity smdies on engineered surface-enhanced Raman scattering-active substrates. Analytical Chemistry, 79, 5078-81. 

Silver films are formed on meso- and macroporous silicon (mejo-PS and macro-PS) by the immersion plating. Scanning electron microscopy reveals the formation of Ag islands along the dendritic structure at the surface of mejo-PS and Ag nanoparticles over the pore walls in the case of macro-PS. The surface-enhanced Raman scattering activity of Ag-macro-PS substrates appears to be greater in comparison with that for Ag-mcio-PS. 

Fig. 4.56. Schematic diagram of a SERS-active substrate and the measurement arrangement. Alumina nanoparticles are deposited on a glass surface and produce the required roughness. A thin silver layer is evaporated on to the nanoparticles and serves for the enhancement. Organic molecules adsorbed on the silver surface can be detected by irradiation with a laser and collecting the Raman scattered light.

Ina similarmarmerto surface-enhanced Raman scattering, surface-enhancement of hyper-Raman scattering is a promising method to study adsorbed molecules on metal surfaces [24]. Based on recent developments in plasmonics, design and fabrication of metal substrates with high enhancement activities is now becoming possible [21]. Combination of the surface enhancement with the electronic resonances would also be helpful for the practical use of hyper-Raman spectroscopy. Development of enhanced hyper-Raman spectroscopy is awaited for the study of solid/liquid interfaces. 

Tarabara V.V., Nabiev I.R., Feofanov A.V., Surface-enhanced Raman scattering (SERS) study of mercaptoethanol monolayer assemblies on silver citrate hydrosol. Preparation and characterization of modified hydrosol as a SERS-active substrate, Langmuir 1998 14 1092-1098. 

Another method for assaying the activity and stereoselectivity of enzymes at in vitro concentrations is based on surface-enhanced resonance Raman scattering (SERRS) using silver nanoparticles (116). Turnover of a substrate leads to the release of a surface targeting dye, which is detected by SERRS. In a model study, lipase-catalyzed kinetic resolution of a dye-labeled chiral ester was investigated. It is currently unclear how precise the method is when identifying mutants which lead to E values higher than 10. The assay appears to be well suited as a pre-test for activity. 

The surface-enhanced Raman scattering (SERS)-active substrates were prepared by electrodeposition of Ag nanoparticles in multiwalled carbon nanotubes (MWCNTs)-based nanocomposites for SERS sensor application. 

Substrates for surface-enhanced Raman scattering (SERS) were prepared by vapor deposition of silver directly onto the surface of porous alumina. Silver nanostructures have been characterized by SEM and UV-Vis absorption. The SERS-activity of the substrates tested with water-soluble cationic Cu-porphyrin as a probe molecule, attained the maximum when Ag mass thickness vtas approximately 60 nm. 

Surface-enhanced Raman scattering (SERS) has attracted considerable attention as a sensitive technique for the detection of chemical, environmental and biological agents in extremely low concentrations [1], The fabrication of reproducible SERS-active substrates with well-defined nanoscale geometries is an important challenge of current research in order to SERS spectroscopy would become a powerful analytical tool of practical purposes. 

Raman Optical Activity The Raman optical activity (ROA) effect is the differential scattering of left- or right-circularly polarized light by a chiral substrate where chirality is studied through Raman spectroscopy. 

An interesting possibility is inducing SERS activity, in a non-SERS-active substrate, by depositing submonolayer quantities of silver on its surface. Van Duyne and Haushalter used this method to measure Raman scattering from a GaAs semiconductor interface. There was also an experiment to use a silver underlayer to induce SERS in a layer covering it. ... 

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