Electroanalysis of Norepinephrine at Bare Gold Electrode Pure and Modified with Gold Nanoparticles and S-Functionalized Self-Assembled Layers in Aqueous Solution

2009 ◽  
Vol 21 (13) ◽  
pp. 1539-1549 ◽  
Author(s):  
Teresa Łuczak
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Gold Electrode ◽  
Bare Gold Electrode ◽  
Self Assembled ◽  
Bare Gold

THE ELECTROCHEMICAL STUDY OF SELF-ASSEMBLED 1,3-PROPANEDITHIOL ON GOLD

2007 ◽  
Vol 14 (01) ◽  
pp. 111-115
Author(s):  
YUQING MIAO ◽  
JIANRONG CHEN ◽  
XIAOHUA WU ◽  
KEMING FANG
Keyword(s):  
Gold Electrode ◽  
Modified Electrodes ◽  
Gold Surface ◽  
Electrochemical Study ◽  
Potential Range ◽  
Electrochemical Behaviors ◽  
Bare Gold Electrode ◽  
Self Assembled ◽  
Bare Gold

The electrochemical behaviors of bare/dithiol-modified gold electrode were studied in the PBS solution with/without dithiols. A pair of current peaks between -1.4 and -0.5 V is related to dithiol adsorption or re-adsorption. An oxidative peak at 0.37 V accompanied by a slight peak at 0.03 V is observed between -0.5 and 0.7 V for the bare gold electrode in the thiol solution, which is due to the formation of bilayer. When the potential is scanned to a very positive value at 1.2 V, a new oxidative peak at 1.07 V appears for the bare gold electrode in the dithiol solution or the PBS solution. The assembled dithiols are desorbed, and gold surface is exposed. The study indicates that the 1,3-propanedithiol modified electrodes should be used during the potential range of -0.8 to 0.8 V to keep the assembled layer stable.

Immobilization of a novel synthesized Schiff base on the surface of a gold electrode for the electrochemical study of adrenaline

2015 ◽  
Vol 7 (12) ◽  
pp. 4995-5005
Author(s):  
Ebrahim Honarmand ◽  
Mohammad Hassan Motaghedifard
Keyword(s):  
Schiff Base ◽  
Gold Electrode ◽  
Electrochemical Study ◽  
Self Assembled Monolayer ◽  
Bare Gold Electrode ◽  
Self Assembled ◽  
Bare Gold

A self-assembled monolayer of 2-[({2-[(2-{[(Z)-1-(2-hydroxy phenyl) methylidene] amino} phenyl) disulfanyl] phenyl} imino) methyl] phenol was fabricated on a bare gold electrode (SITP-Au SAM electrode).

Electrochemical Aptasensor for Label-Free Detection of Protein Based on Gold Nanoparticle Involved Self-Assembly

2013 ◽  
Vol 310 ◽  
pp. 177-182
Author(s):  
Song Bai Zhang ◽  
Bing Jun Zhang ◽  
Qian Liu ◽  
Xia Hu ◽  
Li Ying Zheng ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Self Assembly ◽  
Gold Electrode ◽  
Hot Water ◽  
Target Protein ◽  
Capture Probe ◽  
Label Free ◽  
Label Free Detection ◽  
Self Assembled

A label-free electrochemical biosensing strategy based on gold nanoparticle involved layer-by-layer self assembly for the detection of protein is proposed using platelet derived growth factor-BB dimer (PDGF-BB) as the model analyte. Utilizing the strong sulfur-Au affinity, ethanthiol and capture probe modified gold nanoparticles are self-assembled onto the surface of gold electrode successively. The aptamer probe for target protein hybridizes with the capture probe and the biosensor is fabricated. By measuring ac current voltammetry, the target protein can be sensitively detected in a linear dynamic range from 1-1000 ng/mL with a low detection limit of 0.5 ng/mL. Making use of self-assembled gold nanoparticles layer, a large amount of capture probes can be modified onto the gold electrode, supporting the high sensitivity of the proposed strategy. In addition, good reproducibility, high selectivity and stability are achieved. In particular, the biosensor can be easily regenerated by melting in hot water, making it reusable.

A new chiral electrochemical sensor for the enantioselective recognition of naproxen enantiomers using l-cysteine self-assembled over gold nanoparticles on a gold electrode

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58609-58615 ◽  
Author(s):  
Abbas Afkhami ◽  
Fatemeh Kafrashi ◽  
Mazaher Ahmadi ◽  
Tayyebeh Madrakian
Keyword(s):  
Gold Nanoparticles ◽  
Electrochemical Sensor ◽  
Gold Electrode ◽  
Enantiomeric Composition ◽  
Enantioselective Recognition ◽  
Chiral Compounds ◽  
Self Assembled

A chiral electrochemical sensor for analyzing the enantiomeric composition of chiral compounds is reported.

Design of Electrochemical Biosensor on Naphthalene Content Detection in Water Based on SCM

2014 ◽  
Vol 597 ◽  
pp. 435-438
Author(s):  
Yuan Liu ◽  
Ya Ping Yu ◽  
Hai Yun Wu ◽  
Ruo Kui Chang
Keyword(s):  
Rapid Detection ◽  
Gold Electrode ◽  
Electrochemical Biosensor ◽  
Electrochemical System ◽  
Display Unit ◽  
Oxidation Reduction ◽  
Water Based ◽  
Bare Gold Electrode ◽  
Data Acquisition And Processing ◽  
Bare Gold

In order to achieve rapid detection of naphthalene content in water, the electrochemical biosensor has been developed based on microcontroller by the cyclic voltammetry (CV). The system is consisted of a three-electrode electrochemical system, converting circuit, IAP15F2K61S2 microcontroller and display unit. The voltammetric oxidation-reduction response of a bare gold electrode has been gained in a potential window from −0.3 V to +0.6V. After data acquisition and processing, according to the change of peak current of voltammograms, the naphthalene content is detected and displayed.the sensor can finish the detection of naphthalene content in 15 minutes.

scholarly journals OPTIMISATION OF AN ELECTROCHEMICAL SENSOR BASED ON BARE GOLD ELECTRODE FOR DETECTION OF ALUMINIUM ION

2020 ◽  
pp. 103
Author(s):  
Gilbert Ringgit ◽  
Shafiquzzaman Siddiquee ◽  
Suryani Saallah ◽  
Mohammad Tamrin Mohamad Lal
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Gold Electrode ◽  
Heavy Metal Ion ◽  
Optimum Conditions ◽  
Accumulation Time ◽  
Aluminium Ion ◽  
Scan Rate ◽  
Bare Gold Electrode ◽  
Bare Gold

In this work, an electrochemical method for detection of trace amount of aluminium (Al3+), a heavy metal ion, based on a bare gold electrode (AuE) was developed. Current responses of the AuE under various type of electrolytes, redox  indicators, pH, scan rate and accumulation time were investigated using cyclic voltammetry (CV) method to obtain the optimum conditions for Al3+ detection. The sensing properties of the AuE towards the target ion with different concentrations were investigated using differential pulse voltammetry (DPV) method. From the CV results, the optimalconditions for the detection of Al3+ were Tris-HCl buffer (0.1 M, pH 2) supported by 5 mM Prussian blue with scan rate and accumulation time respectively of 100 mVs−1 and 15 s. Under the optimum conditions, the DPV method was detected with different concentrations of aluminium ion ranging from 0.2 to 1.0 ppm resulted in a good linear regression r² = 0.9806. This result suggests that the optimisation of the basic parameters in electrochemical detection using AuE is crucial before further modification of the Au-electrode to improve the sensitivity and selectivity especially for the low concentration of ion detection. The developed method has a great potential for rapid detection of heavy metal ion (Al3+) in drinking water samples.

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