Ultrasensitive surface‐enhanced Raman spectroscopy detection of explosive molecules with multibranched silver nanostructures

2022 ◽  
Author(s):  
Ashwani Kumar Verma ◽  
Ravi Kant Soni
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Silver Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Silicon Nanowires Coated with Silver Nanostructures as Ultrasensitive Interfaces for Surface-Enhanced Raman Spectroscopy

2009 ◽  
Vol 1 (7) ◽  
pp. 1396-1403 ◽  
Author(s):  
Elisabeth Galopin ◽  
Jacques Barbillat ◽  
Yannick Coffinier ◽  
Sabine Szunerits ◽  
Gilles Patriarche ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Silicon Nanowires ◽  
Surface Enhanced Raman Spectroscopy ◽  
Silver Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

scholarly journals Surface Enhanced Raman Spectroscopy for DNA Biosensors—How Far Are We?

Molecules ◽  
2019 ◽  
Vol 24 (24) ◽  
pp. 4423 ◽  
Author(s):  
Edyta Pyrak ◽  
Jan Krajczewski ◽  
Artur Kowalik ◽  
Andrzej Kudelski ◽  
Aleksandra Jaworska
Keyword(s):  
Raman Spectroscopy ◽  
Limit Of Detection ◽  
Surface Enhanced Raman Spectroscopy ◽  
Diagnostic Tools ◽  
Strong Increase ◽  
Raman Signal ◽  
Silver Nanostructures ◽  
Dna Sensors ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

A sensitive and accurate identification of specific DNA fragments (usually containing a mutation) can influence clinical decisions. Standard methods routinely used for this type of detection are PCR (Polymerase Chain Reaction, and its modifications), and, less commonly, NGS (Next Generation Sequencing). However, these methods are quite complicated, requiring time-consuming, multi-stage sample preparation, and specially trained staff. Usually, it takes weeks for patients to obtain their results. Therefore, different DNA sensors are being intensively developed by many groups. One technique often used to obtain an analytical signal from DNA sensors is Raman spectroscopy. Its modification, surface-enhanced Raman spectroscopy (SERS), is especially useful for practical analytical applications due to its extra low limit of detection. SERS takes advantage of the strong increase in the efficiency of Raman signal generation caused by a local electric field enhancement near plasmonic (typically gold and silver) nanostructures. In this condensed review, we describe the most important types of SERS-based nanosensors for genetic studies and comment on their potential for becoming diagnostic tools.

scholarly journals Laser-Fabricated Plasmonic Nanostructures for Surface-Enhanced Raman Spectroscopy of Bacteria Quorum Sensing Molecules

MRS Advances ◽  
2017 ◽  
Vol 2 (42) ◽  
pp. 2287-2294 ◽  
Author(s):  
Kyle Culhane ◽  
Ke Jiang ◽  
Aaron Neumann ◽  
Anatoliy O. Pinchuk
Keyword(s):  
Raman Spectroscopy ◽  
Quorum Sensing ◽  
Silver Ions ◽  
Homoserine Lactone ◽  
Surface Enhanced Raman Spectroscopy ◽  
Plasmonic Nanostructures ◽  
Silver Nanostructures ◽  
Silver Nanostructure ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

ABSTRACTA laser deposition technique, based on the photo-reduction of silver ions from an aqueous solution, was used to fabricate silver nanostructure surfaces on glass cover slips. The resulting silver nanostructures exhibited plasmonic properties, which show promise in applications towards surface enhanced Raman spectroscopy (SERS). Using the standard thiophenol, the enhancement factor calculated for the deposits was approximately ∼106, which is comparable to other SERS-active plasmonic nanostructures fabricated through more complex techniques, such as electron beam lithography. The silver nanostructures were then employed in the enhancement of Raman signals from N-butyryl-L-homoserine lactone, a signaling molecule relevant to bacteria quorum sensing. In particular, the work presented herein shows that the laser-deposited plasmonic nanostructures are promising candidates for monitoring concentrations of signaling molecules within biofilms containing quorum sensing bacteria.

A surface-enhanced Raman spectroscopy study of thin graphene sheets functionalized with gold and silver nanostructures by seed-mediated growth

Carbon ◽  
2012 ◽  
Vol 50 (2) ◽  
pp. 699-705 ◽  
Author(s):  
Anton N. Sidorov ◽  
Grzegorz W. Sławiński ◽  
A.H. Jayatissa ◽  
Francis P. Zamborini ◽  
Gamini U. Sumanasekera
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Graphene Sheets ◽  
Silver Nanostructures ◽  
Spectroscopy Study ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Seed Mediated

scholarly journals Surface-Enhanced Raman Spectroscopy of Dye and Thiol Molecules Adsorbed on Triangular Silver Nanostructures: A Study of Near-Field Enhancement, Localization of Hot-Spots, and Passivation of Adsorbed Carbonaceous Species

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Manuel R. Gonçalves ◽  
Fabian Enderle ◽  
Othmar Marti
Keyword(s):  
Raman Spectroscopy ◽  
Hot Spots ◽  
Near Field ◽  
Field Enhancement ◽  
Surface Enhanced Raman Spectroscopy ◽  
Spherical Particles ◽  
Silver Nanostructures ◽  
Dye Molecules ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Surface-enhanced Raman spectroscopy (SERS) of thiols and dye molecules adsorbed on triangular silver nanostructures was investigated. The SERS hot-spots are localized at the edges and corners of the silver triangular particles. AFM and SEM measurements permit to observe many small clusters formed at the edges of triangular particles fabricated by nanosphere lithography. Finite-element calculations show that near-field enhancements can reach values of more than 200 at visible wavelengths, in the gaps between small spherical particles and large triangular particles, although for the later no plasmon resonance was found at the wavelengths investigated. The regions near the particles showing strong near-field enhancement are well correlated with spatial localization of SERS hot-spots done by confocal microscopy. Silver nanostructures fabricated by thermal evaporation present strong and fast fluctuating SERS activity, due to amorphous carbon contamination. Thiols and dye molecules seem to be able to passivate the undesired SERS activity on fresh evaporated silver.

Surface-enhanced Raman spectroscopy of neonicotinoid insecticide imidacloprid, assisted by gold and silver nanostructures

2020 ◽  
Vol 53 (3) ◽  
pp. 184-193 ◽  
Author(s):  
Petar Asenov Atanasov ◽  
Nikolay Nedyalkov Nedyalkov ◽  
Naoki Fukata ◽  
Wipakorn Jevasuwan ◽  
Thiyagu Subramani
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Silver Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Neonicotinoid Insecticide
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