Surface-Enhanced Raman Spectroscopy
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TLDR
The use of nanosphere lithography for the fabrication of highly reproducible and robust SERS substrates is described and progress in applying SERS to the detection of chemical warfare agents and several biological molecules is described.Abstract:
The ability to control the size, shape, and material of a surface has reinvigorated the field of surface-enhanced Raman spectroscopy (SERS). Because excitation of the localized surface plasmon resonance of a nanostructured surface or nanoparticle lies at the heart of SERS, the ability to reliably control the surface characteristics has taken SERS from an interesting surface phenomenon to a rapidly developing analytical tool. This article first explains many fundamental features of SERS and then describes the use of nanosphere lithography for the fabrication of highly reproducible and robust SERS substrates. In particular, we review metal film over nanosphere surfaces as excellent candidates for several experiments that were once impossible with more primitive SERS substrates (e.g., metal island films). The article also describes progress in applying SERS to the detection of chemical warfare agents and several biological molecules.read more
Citations
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Localized Surface Plasmon Resonance Spectroscopy and Sensing
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Carbon nanodots: synthesis, properties and applications
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Surface-enhanced Raman spectroscopy: concepts and chemical applications.
TL;DR: Chemical applications of SERS cover a broad range of topics such as catalysis and spectroelectrochemistry, single-molecule detection, and (bio)analytical chemistry.
References
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Spectroscopy of Single Hemoglobin Molecules by Surface Enhanced Raman Scattering
TL;DR: In this article, the detection of molecular vibrations in single hemoglobin (Hb) protein molecules attached to isolated and immobilized silver nanoparticles by surface enhanced Raman scattering (SERS) was demonstrated.
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Scattering and Absorption of Light by Nonspherical Dielectric Grains
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Surface‐enhanced Raman spectroscopy: a brief retrospective
TL;DR: The electromagnetic theory of surface-enhanced Raman spectroscopy (SERS), despite its simplicity, can account for all major SERS observations, including: the need for a nanostructured material as the SERS-active system; the observation that some metals form good SERS active systems while others do not; the observed polarization sensitivity shown by nanoparticle aggregates; and the optical behavior of nanostructure materials in the absence of a molecular adsorbate as mentioned in this paper.
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Electromagnetic contributions to single-molecule sensitivity in surface-enhanced Raman scattering
TL;DR: The calculations indicate that the maximum enhancement factor achievable through electromagnetics is of the order 10(11), which can qualitatively explain why only very few surface sites seem to contribute to the measured signal in single-molecule SERS experiments.
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The Optical Properties of Metal Nanoparticles: The Influence of Size, Shape, and Dielectric Environment
TL;DR: In this paper, the authors describe recent progress in the theory of nanoparticle optical properties, particularly methods for solving Maxwell's equations for light scattering from particles of arbitrary shape in a complex environment.
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