Nanostructures and Surface-Enhanced Raman Spectroscopy

Kosuda, Kathryn M.; Bingham, Julia M.; Wustholz, Kristin L.; Duyne, Richard P. Van; Groarke, Robert

doi:10.1016/b978-0-12-803581-8.00611-1

Cited by 27 publications

(26 citation statements)

References 141 publications

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“…Due to chemisorption of analyte molecules on metal substrates, the electronic states of molecules are either shifted or broadened due to either the interaction with metal or the origin of new electronic states. If the absorbance maximum of an adsorbed molecule is altered such that it is closer to the laser excitation frequency, the cross section of the molecule is increased (29); thus, the spectra intensities increase. The CM enhancement mechanism can be understood as a type of resonance Raman effect.…”

Section: Sers Substrates 501mentioning

confidence: 98%

Engineering of SERS Substrates Based on Noble Metal Nanomaterials for Chemical and Biomedical Applications

Cao

Zhang

Yang

et al. 2015

Applied Spectroscopy Reviews

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Surface-enhanced Raman scattering (SERS) has attracted great interest due to its remarkable enhancement, excellent sensitivity, and the "fingerprinting" ability to produce distinct spectra for detecting various molecules. Noble metal nanomaterials have usually been employed as SERS-active substrates because of their strong SERS enhancement originated from their unique surface plasmon resonance (SPR) properties. Because the SPR property depends on metal material's size, shape, morphology, arrangement, and dielectric environment around metal nanostructures, the key to wider applications of SERS technique is to develop plasmon-resonant structures with novel geometries to enhance Raman signals and to control the periodic ordering of these structures over a large area to obtain reproducible Raman enhancement. This review presents a general view on the theory background of SERS effect and several basic concepts and focuses on recent progress in engineering metallic nanostructures with various morphologies using versatile methods for improving SERS properties. Their potential applications in the field of chemical detection and biological sensing are overviewed.

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Section: Sers Substrates 501mentioning

confidence: 98%

Engineering of SERS Substrates Based on Noble Metal Nanomaterials for Chemical and Biomedical Applications

Cao

Zhang

Yang

et al. 2015

Applied Spectroscopy Reviews

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“…19,21 Since the introduction of nanolithography, the majority of SERS nanofabrication studies has been aimed at the construction of substrates with small interparticle gaps and densities as the precursor for exceptional EF values. 18,[22][23][24][25][26][27][28][29] However, specifications for the substrate needed for routine quantitative analysis demands other than just a strong EF, such as good signal reproducibility, repeatability, and suitable quantitative range. Consequently, rational SERS substrate designing involves the construction of nanostructured arrays that exhibit a proper balance between strong EF and sample loading capacity that is sufficiently large for quantitative SERS measurements in a wide range of sample concentrations.…”

Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Raman Scattering (SERS) Studies of Disc-on-Pillar (DOP) Arrays: Contrasting Enhancement Factor with Analytical Performance

et al. 2019

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The use of nanomachining methods capable of reproducible construction of nano-arrayed devices have revolutionized the field of plasmonic sensing by the introduction of a diversity of rationally engineered designs. Significant strides have been made to fabricate plasmonic platforms with tailored interparticle gaps to improve their performance for surface-enhanced Raman scattering (SERS) applications. Over time, a dichotomy has emerged in the implementation of SERS for analytical applications, the construction of substrates, optimization of interparticle spacing as a means to optimize electromagnetic field enhancement at the localized surface plasmon level, and the substrate sensitivity over extended areas to achieve quantitative performance. This work assessed the enhancement factor of plasmonic Ag/SiO2/Si disc-on-pillar (DOP) arrays of variable pitch with its analytical performance for quantitative applications. Experimental data were compared with those from finite-difference time-domain (FDTD) simulations used in the optimization of the array dimensions. A self-assembled monolayer (SAM) of benzenethiol rendered highly reproducible signals (RSD ∼4–10%) and SERS substrate enhancement factor (SSEF) values in the orders of 106–108 for all pitches. Spectra corresponding to rhodamine 6G (R6G) and 4-aminobenzoic acid demonstrated the advantages of using the more densely packed DOP arrays with a 160 nm pitch (gap = 40 nm) for quantitation in spite of the strongest SSEF was attained for a pitch of 520 nm corresponding to a 400 nm gap.

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“…SERS is a technique resulting in strongly increased Raman signals of molecules at or near metal nanostructures, typically noble metals such as gold and silver and this method is highly dependent on the interaction between adsorbed molecules and the surface of plasmonic nanostructures. In the last years several researchers strived to optimize substrate structure and configuration to maximize enhancement factors such as new plasmonic materials [5,6] with different shapes and sizes [7,8] that support increased SERS enhancement.…”

Section: Introductionmentioning

confidence: 99%

Rhodamine B Detection by SERS with Urchin-like Gold Nanostructures in Water Solution

Ceja-Fdez

López–Luke

Torres–Castro

et al. 2014

Latin America Optics and Photonics Conference

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Nanostructures and Surface-Enhanced Raman Spectroscopy

Cited by 27 publications

References 141 publications

Engineering of SERS Substrates Based on Noble Metal Nanomaterials for Chemical and Biomedical Applications

Engineering of SERS Substrates Based on Noble Metal Nanomaterials for Chemical and Biomedical Applications

Surface-Enhanced Raman Scattering (SERS) Studies of Disc-on-Pillar (DOP) Arrays: Contrasting Enhancement Factor with Analytical Performance

Rhodamine B Detection by SERS with Urchin-like Gold Nanostructures in Water Solution

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