scholarly journals The adsorption of thiophenol on gold – a spectroelectrochemical study

2015 ◽  
Vol 17 (33) ◽  
pp. 21364-21372 ◽  
Author(s):  
Rudolf Holze
Keyword(s):  
Raman Spectroscopy ◽  
Cyclic Voltammetry ◽  
Aqueous Solutions ◽  
Gold Electrode ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Polycrystalline Gold

The adsorbate formed by adsorption of thiophenol on a polycrystalline gold electrode and brought into contact with aqueous solutions of 1 M HClO4and 0.1 M KClO4has been studied using cyclic voltammetry and surface-enhanced Raman spectroscopy.

scholarly journals Electrochemistry and surface-enhanced Raman spectroscopy of CTAB modulated interactions of magnetic nanoparticles with biomolecules

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 3628-3634 ◽  
Author(s):  
Delina Joseph ◽  
Raul D. Rodriguez ◽  
Akash Verma ◽  
Elaheh Pousaneh ◽  
Dietrich R. T. Zahn ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Cyclic Voltammetry ◽  
Magnetic Nanoparticles ◽  
Electrochemical Behavior ◽  
Surface Enhanced Raman Spectroscopy ◽  
Molecular Associations ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Insight Into

In this study, cyclic voltammetry was used to unearth the electrochemical behavior of MNPs/CTAB and their interaction with biomolecules whereas SERS provided an insight into the mode of interaction in these molecular associations.

scholarly journals Rapid Determination of the ‘Legal Highs’ 4-MMC and 4-MEC by Spectroelectrochemistry: Simultaneous Cyclic Voltammetry and In Situ Surface-Enhanced Raman Spectroscopy

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 295
Author(s):  
Jerson González-Hernández ◽  
Colby Edward Ott ◽  
María Julia Arcos-Martínez ◽  
Álvaro Colina ◽  
Aránzazu Heras ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Cyclic Voltammetry ◽  
Surface Enhanced Raman Spectroscopy ◽  
Designer Drugs ◽  
Sers Substrate ◽  
Legal Highs ◽  
Reliable Determination ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

The synthetic cathinones mephedrone (4-MMC) and 4-methylethcathinone (4-MEC) are two designer drugs that represent the rise and fall effect of this drug category within the stimulants market and are still available in several countries around the world. As a result, the qualitative and quantitative determination of ‘legal highs’, and their mixtures, are of great interest. This work explores for the first time the spectroelectrochemical response of these substances by coupling cyclic voltammetry (CV) with Raman spectroscopy in a portable instrument. It was found that the stimulants exhibit a voltammetric response on a gold screen-printed electrode while the surface is simultaneously electro-activated to achieve a periodic surface-enhanced Raman spectroscopy (SERS) substrate with high reproducibility. The proposed method enables a rapid and reliable determination in which both substances can be selectively analyzed through the oxidation waves of the molecules and the characteristic bands of the electrochemical SERS (EC-SERS) spectra. The feasibility and applicability of the method were assessed in simulated seized drug samples and spiked synthetic urine. This time-resolved spectroelectrochemical technique provides a cost-effective and user-friendly tool for onsite screening of synthetic stimulants in matrices with low concentration analytes for forensic applications.

Surface Enhanced Raman Spectroscopy and Cyclic Voltammetry Studies of Ni-rich Oxide Nanowires as Electrode Materials

2008 ◽  
Vol 1100 ◽  
Author(s):  
Que Anh Nguyen ◽  
Yash V. Bhargava ◽  
Shawn A. Thorne ◽  
Tzipi Cohen-Hyams ◽  
Thomas M. Devine
Keyword(s):  
Raman Spectroscopy ◽  
Cyclic Voltammetry ◽  
Current Density ◽  
Electrode Materials ◽  
Surface Enhanced Raman Spectroscopy ◽  
Alloy 600 ◽  
Oxide Nanowires ◽  
Chemical Phase ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

AbstractA novel electrode material for Ni metal hydride batteries, composed of electrochemically synthesized, Ni-rich oxide nanowires, was investigated in this study. The nanowires, grown on Alloy 600 in a high-temperature, high-pressure aqueous electrolyte, are typically 25nm in diameter and 5-10um long. Cyclic voltammetry, with surface enhanced Raman spectroscopy (SERS) suggests that anodic polarization of the wires converts Ni2+ species to Ni3+, present as γ–-NiOOH, the chemical phase involved in the charge/discharge reaction in Ni-MH batteries. The reversibility of the reaction was confirmed via multiple polarization cycles and SEM imaging. In addition, the current density and polarization behavior of the nanowires in 0.01M KOH solution is compared to that of planar NiO and Alloy 600. Results suggest that the nanowires, due to their higher surface area, achieves at least 10 times the current density (for a given apparent area) of the non-nanowire samples.

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