Critical assessment of enhancement factor measurements in surface-enhanced Raman scattering on different substrates

2015 ◽  
Vol 17 (33) ◽  
pp. 21294-21301 ◽  
Author(s):  
Daniel C. Rodrigues ◽  
Michele L. de Souza ◽  
Klester S. Souza ◽  
Diego P. dos Santos ◽  
Gustavo F. S. Andrade ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Enhancement Factor ◽  
Surface Enhanced Raman Scattering ◽  
Critical Assessment ◽  
Raman Signal ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

The SERS enhancement factor (SERS-EF) is one of the most important parameters that characterizes the ability of a given substrate to enhance the Raman signal for SERS applications. The comparison between dynamic and static substrates, however, should not be performed in sense of SERS-EF.

scholarly journals Correction: Towards improved precision in the quantification of surface-enhanced Raman scattering (SERS) enhancement factors: a renewed approach

The Analyst ◽  
2015 ◽  
Vol 140 (2) ◽  
pp. 670-670 ◽  
Author(s):  
Arumugam Sivanesan ◽  
Witold Adamkiewicz ◽  
Govindasamy Kalaivani ◽  
Agnieszka Kamińska ◽  
Jacek Waluk ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Enhancement Factors ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Correction for ‘Towards improved precision in the quantification of surface-enhanced Raman scattering (SERS) enhancement factors: a renewed approach’ by Arumugam Sivanesan et al., Analyst, 2015, DOI: 10.1039/c4an01778a.

scholarly journals A Biomedical Surface Enhanced Raman Scattering Substrate: Functionalized Three-Dimensional Porous Membrane Decorated with Silver Nanoparticles

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Li Yuan ◽  
Jinghuai Fang ◽  
Yonglong Jin ◽  
Chaonan Wang ◽  
Tian Xu
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Three Dimensional ◽  
Surface Enhanced Raman Scattering ◽  
Porous Membrane ◽  
Raman Signal ◽  
Functional Surface ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

We fabricated a simple, cheap, and functional surface enhanced Raman scattering substrate for biomedical application. Hot spots between two close silver nanoparticles distributed in the skeleton of a three-dimensional porous membrane, especially in the pores, were formed. The dual poles of micropores in the membrane were discussed. The pores could protect the silver nanoparticles in the pores from being oxidized, which makes the membrane effective for a longer period of time. In addition,Staphylococcus aureuscells could be trapped by the micropores and then the Raman signal became stronger, indicating that the functional surface enhanced Raman scattering substrate is reliable.

Finite-Size Effects and Surface-Enhanced Raman Scattering in Noble-Metal Nanoparticles

2004 ◽  
Vol 818 ◽  
Author(s):  
Vitaliy N. Pustovit ◽  
Tigran V. Shahbazyan
Keyword(s):  
Raman Scattering ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Finite Size ◽  
Surface Enhanced Raman Scattering ◽  
Noble Metal Nanoparticles ◽  
Raman Signal ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

AbstractWe study the role of a strong electron confinement on the surface-enhanced Raman scattering from molecules adsorbed on small noble-metal nanoparticles. We describe a novel enhancement mechanism which originates from the different effect that confining potential has on s-band and d-band electrons. We demonstrate that the interplay between finite-size and screening efects in the nanoparticle surface layer leads to an enhancement of the surface plasmon local field acting on a molecule located in a close proximity to the metal surface. Our calculations show that the additional enhancement of the Raman signal is especially strong for small nanometer-sized nanoparticles.

scholarly journals Towards improved precision in the quantification of surface-enhanced Raman scattering (SERS) enhancement factors: a renewed approach

The Analyst ◽  
2015 ◽  
Vol 140 (2) ◽  
pp. 489-496 ◽  
Author(s):  
Arumugam Sivanesan ◽  
Witold Adamkiewicz ◽  
Govindasamy Kalaivani ◽  
Agnieszka Kamińska ◽  
Jacek Waluk ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Enhancement Factors ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

This paper demonstrates a renewed procedure for the quantification of surface-enhanced Raman scattering (SERS) enhancement factors with improved precision.

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

2019 ◽  
Vol 73 (6) ◽  
pp. 665-677 ◽  
Author(s):  
Raymond A. Velez ◽  
Nickolay V. Lavrik ◽  
Ivan I. Kravchenko ◽  
Michael J. Sepaniak ◽  
Marco A. De Jesus
Keyword(s):  
Raman Scattering ◽  
Enhancement Factor ◽  
Surface Enhanced Raman Scattering ◽  
Analytical Performance ◽  
Interparticle Spacing ◽  
Localized Surface Plasmon ◽  
Sers Substrate ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

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.

Local Electric Field Enhancement of Neighboring Ag Nanoparticles in Surface Enhanced Raman Scattering

2013 ◽  
Vol 760-762 ◽  
pp. 801-805 ◽  
Author(s):  
Chao Yue Deng ◽  
Gu Ling Zhang ◽  
Bin Zou ◽  
Hong Long Shi ◽  
Yu Jie Liang ◽  
...  
Keyword(s):  
Electric Field ◽  
Raman Scattering ◽  
Electric Fields ◽  
Ag Nanoparticles ◽  
Surface Enhanced Raman Scattering ◽  
Ag Nps ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

We used a simple low-temperature hydrothermal approach to synthesize Ag nanoparticles (NPs) and demonstrated their efficiency as organic molecule detectors in surface enhanced Raman Scattering (SERS). Using finite difference time domain simulation, we described an investigation on the distribution of electric fields amplitude of the neighboring Ag NPs. The enhanced electric field is confined at the interparticle gaps and the enhancement factor can be further increased with reducing the spacing between the NPs. The theoretical simulation demonstrated good consistency with the experimental measurement results, which predicts an electric fields amplitude enhancement of 115 at the center of NPs gap and an electromagnetic SERS enhancement of 108. The evidence of clear correlations between SERS enhancement and morphology distribution offer a route to develop more effective SERS substrates.

Structural Dynamics of a Single Photoreceptor Protein Molecule Monitored With Surface-Enhanced Raman Scattering Substrates

2008 ◽  
Vol 1077 ◽  
Author(s):  
Kushagra Singhal ◽  
Karthik Bhatt ◽  
Zhouyang Kang ◽  
Wouter Hoff ◽  
Aihua Xie ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Single Molecule ◽  
Enhancement Factor ◽  
Protein Molecule ◽  
Surface Enhanced Raman Scattering ◽  
Initial Study ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Halorhodospira Halophila

ABSTRACTPhotoactive yellow protein (PYP) is a small cytosolic photoreceptor that actuates the negative phototactic response in its host organism Halorhodospira halophila. It has an optical absorption maximum at 446 nm (blue light). We report an initial study of the photocycle of PYP at the single molecule level using “high enhancement factor” surface-enhanced Raman scattering (SERS)-active nanostructures with 514 nm laser excitation. The SERS-active “nanometal-on-semiconductor” structures are prepared employing a redox technique on thin germanium films, coated on glass slides. Single molecule spectra are observed in terms of sudden appearance of discernable Raman peaks with spectral fluctuations. The single molecule spectra capture protonation, photo-isomerization, and H-bond breaking - the steps that are instrumental in the photocycle of PYP. This is indicative of single PYP molecules diffusing to high-enhancement-factor SERS sites, and undergoing photo-cycle under 514 nm excitation.

Effect of chemisorbed thiophenols with an electron donating group on surface-enhanced Raman scattering of gold nanorods

2020 ◽  
Vol 22 (26) ◽  
pp. 14832-14837
Author(s):  
Min Jung Seo ◽  
Kyeong Rim Ryu ◽  
Geun Wan Kim ◽  
Ji Won Ha
Keyword(s):  
Raman Scattering ◽  
Intermolecular Interactions ◽  
Gold Nanorods ◽  
Surface Enhanced Raman Scattering ◽  
Probe Molecules ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

The surface-enhanced Raman scattering (SERS) enhancement with electron donating group (EDG) is caused by the formation of aggregates through intermolecular interactions among probe molecules.

scholarly journals One Step Fabrication of Highly Absorptive and Surface Enhanced Raman Scattering (SERS) Silver Nano-trees on Silicon Substrate

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Sara Abdel Razek ◽  
Ahmed B. Ayoub ◽  
Mohamed A. Swillam
Keyword(s):  
Raman Scattering ◽  
Ethylene Glycol ◽  
Silicon Substrate ◽  
Enhancement Factor ◽  
High Sensitivity ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
One Step ◽  
Enhanced Raman Scattering

Abstract Silver Nano-trees (AgNTs) were synthesized by one-step electroless method with different densities via water or ethylene glycol (EG) on silicon substrate in one minute. The density of AgNTs is controlled by changing the concentration of silver nitrate in etchant solution. The absorption of NTs fabricated via EG is higher than absorption of NTs without EG. The AgNTs are employed as substrates for surface-enhanced Raman scattering (SERS) and exhibit high sensitivity. The silver Nano-trees fabricated via ethylene glycol (AgNTs-EG) enhances the Raman spectrum of pyridine (Py) with higher enhancement factor. Moreover, the SERS-active substrates prepared by using EG were able to detect Pyridine with concentration as low as 0.005 mM, the ones fabricated by water could only detect Pyridine at concentration of 0.2 mM.

A strong charge-transfer effect in surface-enhanced Raman scattering induced by valence electrons of actinide elements

RSC Advances ◽  
2015 ◽  
Vol 5 (41) ◽  
pp. 32198-32204 ◽  
Author(s):  
Yang Gao ◽  
Lei Chen ◽  
Xing Dai ◽  
Ruixia Song ◽  
Bo Wang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Transfer Effect ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Valence Electrons ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Actinide Elements

The 6d electrons of Ac atom involved in excited transitions induce a strong CT-SERS enhancement which can be tuned by changing the conformation of pyridine-Ac@Au7 complexes.

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