Protonation and deprotonation of cysteine and cystine monolayers probed by impedance spectroscopy

Hager, G. T.; Brolo, Alexandre G.

doi:10.1016/j.jelechem.2008.10.026

Cited by 32 publications

(33 citation statements)

References 43 publications

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“…4 is about right for a desorption/readsorption process. The desorption/readsorption of cysteine from gold reportedly occurs between À600 and À700 mV relative to an SCE [13]. The potential range in Fig.…”

Section: Resultsmentioning

confidence: 95%

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Use of polarization-dependent SERS from scratched gold films to monitor the electrochemically-driven desorption and readsorption of cysteine

Anema

Brolo

2010

Journal of Electroanalytical Chemistry

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Section: Resultsmentioning

confidence: 95%

“…Potentials were applied to the electrochemical system using a Hokuto Denko Limited potentiostat/galvanostat, model HAB-151. Cyclic voltammograms obtained for a similar system, but with a much lower concentration of cysteine in solution, have been published elsewhere [13].…”

Section: Methodsmentioning

confidence: 99%

Use of polarization-dependent SERS from scratched gold films to monitor the electrochemically-driven desorption and readsorption of cysteine

Anema

Brolo

2010

Journal of Electroanalytical Chemistry

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“…34 The electrochemical CV peaks located at -0.04 V and -0.35 V for cvp2 and cvp2′, respectively at the copper germanate nanowires modified GCE were also contributed to the adsorption and desorption process of L-cysteine and L-cystine. 35 Similar to the electrochemical CV peaks for the above reports, the electrochemical CV peaks at -0.93 V, -0.44 V for cvp2 and cvp2′, respectively at the Li doped bismuth oxide nanorods modified GCE is considered to be contributed to the adsorption and desorption process of L-cysteine and L-cystine.…”

Section: Resultsmentioning

confidence: 95%

Growth of Li Doped Bismuth Oxide Nanorods and its Electrochemical Performance for the Determination of L-Cysteine

2017

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Li doped bismuth oxide nanorods have been prepared using sodium bismuthate and Li acetate. X-ray diffraction (XRD) pattern shows that the nanorods are composed of monoclinic Bi 2 O 4 and cubic LiBi 12 O 18.50 phases. Scanning electron microscopy (SEM) observation shows that the nanorods have the length and diameter of 1-5 μm and 50-350 nm, respectively. The formation of the Li doped bismuth oxide nanorods is closely relative to the hydrothermal conditions. The electrochemical performance for the determination of L-cysteine based on a Li doped bismuth oxide nanorods modified glassy carbon electrode (GCE) has been developed. The CV peak current increases obviously and linearly with increasing the scan rate. Under the optimal conditions, Li doped bismuth oxide nanorods modified GCE exhibits good analytical performance with good reproducibility and stability. The linear range of L-cysteine is 0.0001-2 mM and the detection limit is 0.36 μM and 0.17 μM for cvp1 and cvp2, respectively.

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“…Therefore, cvp1-cvp1′ can be contributed to the oxidation-reduction reaction between tartaric acid and tartrate. The adsorption-desorption process of different biological molecules, such as cysteine and ascorbic acid has been analysed suggesting the adsorption-desorption process of biological molecules at the surface of electrodes (Hager and Brolo, 2009;Pei et al, 2012). cvp2-cvp2′ was assigned to the adsorption-desorption process between biological molecules.…”

Section: Resultsmentioning

confidence: 99%

The electrochemical detection of tartaric acid using Cu vanadate nanorods modified electrode

Pei¹,

Wei²,

Lin³

et al. 2015

IJNBM

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Cu vanadate nanorods have been used as the glassy carbon electrode (GCE) modified materials for the electrochemical detection of tartaric acid. The effects of scan rate, tartaric acid concentration and electrolytes in the electrochemical behaviours of tartaric acid in KCl solution have been analysed. Two pairs of semi-reversible cyclic voltammogram (CV) peaks are observed. The CV peaks are located at +0.12 V, -0.04 V (cvp1, cvp2) and -0.07 V, -0.41 V (cvp1′, cvp2′), respectively. The intensity of the electrochemical CV peaks increases linearly with the increase of the scan rate from 25 to 200 mVs -1 , tartaric acid concentration from 0.01 to 2 mM, respectively. The detection limit is 7.6 μM and 1.3 μM for cvp1 and cvp2, respectively at a signal-to-noise ratio of 3. Cu vanadate nanorods modified GCE shows good stability.Keywords: tartaric acid; Cu vanadate nanorods; electrochemical detection; glassy carbon electrode; GCE.Reference to this paper should be made as follows: Pei, L.Z., Wei, T., Lin, N. He has published more than 50 papers, reviews and communications in international journals, such as J. Mater. Chem. A, CrystEngComm, J. Electrochem. Soc., Electrochim. Acta, Phys. Rev. Lett., RSC Adv., J. Alloy Compd. and Mater. Charact. He has also one US patent and more than ten Chinese patents.

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Protonation and deprotonation of cysteine and cystine monolayers probed by impedance spectroscopy

Cited by 32 publications

References 43 publications

Use of polarization-dependent SERS from scratched gold films to monitor the electrochemically-driven desorption and readsorption of cysteine

Use of polarization-dependent SERS from scratched gold films to monitor the electrochemically-driven desorption and readsorption of cysteine

Growth of Li Doped Bismuth Oxide Nanorods and its Electrochemical Performance for the Determination of L-Cysteine

The electrochemical detection of tartaric acid using Cu vanadate nanorods modified electrode

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