Illuminating nanostructured gold electrode: surface plasmons or electron ejection?

2018 ◽  
Vol 210 ◽  
pp. 281-287 ◽  
Author(s):  
Di Huang ◽  
Quanfeng He ◽  
Jie-Jie Shan ◽  
Matthew Sartin ◽  
Ran Pang ◽  
...  
Keyword(s):  
Surface Plasmons ◽  
Surface Plasmon ◽  
Electrode Surface ◽  
Gold Electrode ◽  
Xenon Lamp ◽  
Photoelectric Current ◽  
Faradaic Current ◽  
Working Electrode ◽  
Nanostructured Gold ◽  
Electron Ejection

We used a surface-plasmon-active gold-mushroom-array as a working electrode and observed enhanced faradaic current from ferrocenemethanol following illumination with a xenon lamp. The photoelectric current behaved differently in the presence and absence of oxygen in the solution.

scholarly journals Homogeneous electron-transfer of chlorophyll and its derivative chlorophyllin at gold electrode

2019 ◽  
Vol 7 (1) ◽  
pp. 1-17
Author(s):  
Alhasan H ◽  
Alahmadi N ◽  
Wadhawan J
Keyword(s):  
Electron Transfer ◽  
Cyclic Voltammetry ◽  
Electrode Surface ◽  
Gold Electrode ◽  
Reference Electrode ◽  
Surface Preparation ◽  
Active Species ◽  
Bulk Solution ◽  
Photovoltaic Properties ◽  
Working Electrode

Introduction: Chlorophyll is a light harvesting pigment, which absorbs light in the visible spectrum of sunlight and promotes electron transfer, Chlorophyllin (CHL) is One of the most important derivative molecules of chlorophyll. Nowadays, chlorophyll pigment and its derivatives are utilised in organic photosynthetic solar cells for their desirable photovoltaic properties. Cyclic voltammetry (CV) is an essential technique. It is extensively used to study electroactive species to interpret the intermediates of reactions, supply information about the thermodynamics of oxidation-reduction reactions and elucidate the kinetics of electron transfer reactions. Materials and Methods: Prior to the electrochemical study, the working gold (Au) electrode surface was prepared by immersing it in the various concentrations of chlorophyllin for a period time. The electrolyte was degassed by using N2 for approximately 30 minutes inside a Faraday cage before any electrochemical experiment was performed. A three electrode system was used with, Ag/AgCl as a reference electrode, graphiteas a counter and the working electrode (Au). Results and Discussion: As a route to develop new chemical systems for artificial photosynthesis, this work reports the effectiveness of different parameters in transferring electrons between chlorophyllin (CHL) pigment and the working electrode surface (gold). These parameters such as the adsorption time, the electrolyte nature and concentration and chlorophyllin concentration are investigated. The use of chlorophyllin as a redox mediator is examined, with a gold electrode being employed. The importance of gold electrode surface preparation in determining the mechanism of redox is described, and the environment of adsorption process of the different concentrations of chlorophyllin on the surface of the gold electrode has been elucidated in this study. Conclusiones: The electrochemical method showed that the cyclic voltammetry responses of studied adsorption chlorophyllin pigment on the gold electrode were more efficient. In addition, the redox reaction was successful electrochemically in aqueous solution thanthe organic solution. It was suggested that electrons reduce to the chlorophyllin pigment by adding active species in the bulk solution homogeneous transfer. Finally, detections of chl on spinach leaves using various methods are reported.

Chiral surface plasmon-enhanced chiral spectroscopy: principles and applications

Nanoscale ◽  
2021 ◽  
Author(s):  
Xijiao Mu ◽  
Li Hu ◽  
Yuqing Cheng ◽  
Yurui Fang ◽  
Mengtao Sun
Keyword(s):  
Surface Plasmons ◽  
Surface Plasmon ◽  
Scientific Research ◽  
Research Results ◽  
Development Context ◽  
Chiral Surface

In this review, the development context and scientific research results of chiral surface plasmons (SPs) in recent years are classified and described in detail.

Surface plasmon interferometry: measuring group velocity of surface plasmons

2007 ◽  
Vol 32 (10) ◽  
pp. 1235 ◽  
Author(s):  
Vasily V. Temnov ◽  
Ulrike Woggon ◽  
José Dintinger ◽  
Eloise Devaux ◽  
Thomas W. Ebbesen
Keyword(s):  
Group Velocity ◽  
Surface Plasmons ◽  
Surface Plasmon

scholarly journals Kinetic studies of HRP adsorption on ds-DNA immobilized on gold electrode surface by EIS and SPR

2010 ◽  
Vol 21 (9) ◽  
pp. 1648-1655 ◽  
Author(s):  
Danielle C. M Ferreira ◽  
Renata K Mendes ◽  
Lauro T Kubota
Keyword(s):  
Electrode Surface ◽  
Gold Electrode ◽  
Kinetic Studies

Effect of surfactants and halide ions on the adsorption and oxidation of homocysteine at the gold electrode

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 50315-50321
Author(s):  
Jianying Wang ◽  
Shangshang Zuo ◽  
Cui Lu ◽  
Yanbing Zu ◽  
Zuofeng Chen
Keyword(s):  
Electrode Surface ◽  
Gold Electrode ◽  
Halide Ions

This study demonstrates how adsorptive species including a series of surfactants and halide ions affect the adsorption of Hcy on the electrode surface, as well as how the change of Hcy adsorption affects the oxidation of Hcy.

Novel Protocol for Covalent Immobilization of Horseradish Peroxidase on Gold Electrode Surface

2009 ◽  
Vol 21 (6) ◽  
pp. 696-700 ◽  
Author(s):  
Abd-Elgawad Radi ◽  
Xavier Muñoz-Berbel ◽  
Montserrat Cortina-Puig ◽  
Jean-Louis Marty
Keyword(s):  
Horseradish Peroxidase ◽  
Electrode Surface ◽  
Gold Electrode ◽  
Covalent Immobilization

Trends in the development of sensor devices based on surface plasmon resonance (Review)

2021 ◽  
Vol 56 ◽  
pp. 5-26
Author(s):  
A. V. Samoylov ◽  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmons ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Light Wave ◽  
Monochromatic Light ◽  
Dielectric Substrate ◽  
Spr Imaging ◽  
Imaging Sensors ◽  
Polarization Contrast

Trends in the development of modern sensory devices based on surface plasmon resonance (SPR) are considered. The basic principles of construction of SPR sensor are given. For excitation of surface plasmons on the surface of sensitive elements of biosensory, a prism of total internal reflection is used or a dielectric substrate are used. A thin (dozens nm) film of high-conductive metal (mainly gold or silver) is applied to the working surface of the prisms or dielectric substrate. In a typical observation experiment, SPR is measured dependence on the angle of increasing light intensity, reflected by the resonance sensitive surface of the prism (chip). The optical schemes and principles of work of various SPR sensors are considered: - SPR Sensors with angular modulation, which are the most commonly used method based on the corner registration, in which the SPR occurs. The surface of the metal film is irradiated by monochromatic light and scans on a certain range of angles. There is a kind of SPR sensors with angular modulation, in which there is no mechanical scan of the angle of fall. Such sensors are entirely necessary for excitation of PPRs a set of angles is obtained due to a divergent or convergent light beam. - PPR sensors with a wavelength modulation is based on fixing an angle of falling light at a certain value and modulation of the wavelength of the incident light. Excitation of surface plasmons leads to a characteristic failure in the spectrum of reflected radiation. - Phase sensitive SPR sensors in which a change in the phase of the light wave associated with the surface plasma is measured on one corner of the fall and the wavelength of the light wave and is used as the output signal. - SPR imaging sensors in which the Technology of SPR imaging (SPRi) combines the sensitivity of the SPR with spatial image capabilities. The SPRI circuit uses as a fixed angle (as a rule, a slightly left angle of the SPR) and a fixed wavelength to measure changes in the reflection ability (Δ% R) that occur when the curve of the SPR is shifted due to the change in the refractive index above the surface of the sensor element. - SPR imaging sensors polarization contrast. In order to improve the quality of high-performance SPR imaging sensors in terms of sensitivity and resolution, the method of polarization contrast is used Disadvantages and advantages of SPR sensors are constructed with different principles are considered. The design and prospect of the use of achromatic and suburchast wave plates in the PPR imaging sensors with polarization contrast are considered.

Layer self-assembly of gold nanoparticles surface plasmon triggered photoelectric current applied plasmon sensitized solar cell

2014 ◽  
Vol 7 (2) ◽  
pp. 267-273
Author(s):  
苏彦勋 SU Yen-hsun ◽  
柯沅锋 KE Yuan-feng ◽  
蔡士良 CAI Shi-liang ◽  
姚芊瑜 YAO Qian-yu ◽  
徐嘉妘 XYU Jia-yun ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Solar Cell ◽  
Surface Plasmon ◽  
Self Assembly ◽  
Photoelectric Current

scholarly journals Microfabricated Au-Film Sensors for the Voltammetric Determination of Hg(II)

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1518
Author(s):  
Maria Tsetsoni ◽  
Eleni Roditi ◽  
Christos Kokkinos ◽  
Anastasios Economou
Keyword(s):  
Electrode Surface ◽  
Limit Of Detection ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Voltammetric Determination ◽  
Film Sensor ◽  
Au Film ◽  
Working Electrode ◽  
Anodic Stripping

In this work, a microfabricated Au-film sensor was designed and fabricated for thevoltammmetric determination of Hg(II). The electrode was fabricated on a silicon chip with astandard microengineering approach utilizing photolithography for patterning the electrode shapeand sputtering for deposition of thin Cr and Au films on the surface of the sensors. The sensorswere used for the determination of trace Hg(II) with anodic stripping voltammetry (ASV): initiallyHg(II) in the sample was accumulated on the Au working electrode surface by reduction andformation of an Au(Hg) amalgam followed by oxidation of the preconcentrated metallic Hg using asquare wave voltammetric scan. The limit of detection was 1.5μgL−1 and the coefficient of variationof 10 consecutive measurements was 3.1%.

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