SERS—See Surface-enhanced Raman spectroscopy

INFRARED TECHNOLOGY AND RAMAN SPECTROSCOPY - RAMAN SPECTROSCOPY] (Vol 14) Sers. See Surface-enhanced Raman scattering. 

On Ag sols, molecules lie mainly fiat on the surface, as determined from SERS (surface enhanced Raman spectroscopy) measurements. However, the molecules are twisted and there is evidence for a small inclination against the surface. The twisting decreases and the inclination increases with increasing chain length [10-12]. The observed twisting of the molecules is in line with crystal powder X-ray diffraction data (see, e.g., [13] and references therein) which show a small twisting angle (3 -12 ) between the monomeric units in the solid state of 3T [14] and 4T [15,16]. 2T... 

See also Matrix Isolation Studies By IR and Raman Spectroscopies Nonlinear Optical Properties Nonlinear Raman Spectroscopy, Instruments Nonlinear Raman Spectroscopy, Theory Photoacoustic Spectroscopy, Theory Raman Optical Activity, Applications Raman Optical Activity, Theory Rayleigh Scattering and Raman Spectroscopy, Theory Surface-Enhanced Raman Scattering (SERS), Applications. 

See also Biochemical Applications of Fluorescence Spectroscopy Biomacromolecular Applications of UV-Visible Absorption Spectroscopy Chiroptical Spectroscopy, General Theory Chiroptical Spectroscopy, Orientated Molecules and Anisotropic Systems Ellipsometry Surface Plasmon Resonance, Instrumentation Surface Plasmon Resonance, Theory Surface-enhanced Raman Scattering (SERS), Applications. 

See also Bloflulds Studied By NMR Chiroptical Spectroscopy, General Theory Forensic Science, Applications of IR Spectroscopy Industrial Applications of IR and Raman Spectroscopy IR Spectrometers Medical Science Applications of IR Membranes Studied By NMR Spectroscopy Nucleic Acids and Nucleotides Studied Using Mass Spectrometry Nucleic Acids Studied By NMR Peptides and Proteins Studied Using Mass Spectrometry Raman Spectrometers Surface-Enhanced Raman Scattering (SERS), Applications. 

The discovery and understanding of SERS was important not only because it made Raman a more viable analytical method but also because it introduced the concept of surface-enhanced spectroscopies in general. With the SERS precedent, surface-enhanced resonance Raman spectroscopy (SERRS) and surface-enhanced hyper-Raman spectroscopy (SEHRS) have both been discovered and put to use as analytical tools. In fact, enhancement factors as large as 10 have been measured in SEHRS experiments (see Section VII.B). This immense enhancement was only recently surpassed by the 10 " enhancement measured in single molecule SERS (see Section X). 

SERS. A phenomenon that certainly involves the adsorbent-adsorbate interaction is that of surface-enhanced resonance Raman spectroscopy, or SERS. The basic observation is that for pyridine adsorbed on surface-roughened silver, there is an amazing enhancement of the resonance Raman intensity (see Refs. 124—128). More recent work has involved other adsorbates and colloidal... 

We may thus begin to see more applications of conventional Raman spectroscopy, e.g., of monolayers on well-defined substrate surfaces. On the other hand, SERS will remain a powerful technique in its own right because of its greater sensitivity and surface specificity. It remains practically the only technique available to determine nondestructively and in a non-UHV environment the orientation of molecules in situ in a dense medium, since the contribution to the observed signal by molecules farther than about 50 A away from the interface is negligible compared with the enhanced signal from the interfacial molecules. 

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