Characterisation of gold electrodes modified with self-assembled monolayers of l-cysteine for the adsorptive stripping analysis of copper

Yang, Wenrong; Gooding, J. Justin; Hibbert, David Brynn

doi:10.1016/s0022-0728(01)00649-0

Cited by 264 publications

(168 citation statements)

References 35 publications

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“…As stated in a previous report [24], this behaviour is indicative of electrosorption process [34], [35] and [36], which suggests π-π interaction between the benzene rings of the phthalocyanine and the sidewalls of the immobilised SWCNT at the BPPGE. We also observed electropolymerization process (i.e., growth in anodic and cathodic peaks during our experiments) (not shown) but only when CoTAPc was still dissolving in DMF.…”

Section: Characterization Of Swcnt-cotapcsupporting

confidence: 80%

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Electrochemical properties of surface-confined films of single-walled carbon nanotubes functionalised with cobalt(II)tetra-aminophthalocyanine: Electrocatalysis of sulfhydryl degradation products of V-type nerve agents

Pillay

Ozoemena

2007

Electrochimica Acta

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Section: Characterization Of Swcnt-cotapcsupporting

confidence: 80%

“…7 and Fig. 8) are typical of CNT-based electrodes for thiols and related analytes [23] and [35]. Based on such reports, we ascribe the first oxidation peak (example in Fig.…”

Section: Electrochemical Impedance Spectroscopic Investigationsmentioning

confidence: 68%

Electrochemical properties of surface-confined films of single-walled carbon nanotubes functionalised with cobalt(II)tetra-aminophthalocyanine: Electrocatalysis of sulfhydryl degradation products of V-type nerve agents

Pillay

Ozoemena

2007

Electrochimica Acta

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“…As shown in Figure 2, the L-cysteine modified electrode exhibited two reduction peaks of cyclic voltammogram in 0.5 mol L À1 KOH solution. The first peak at about À0.7 V was due to the cleavage of the AuÀS bond, the second peak at about À1 V possibly due to a similar field-induced rearrangement of cysteine clusters after cleavage [16]. The reduction peaks were obtained by CV after self-assembly, demonstrating that L-cysteine had successfully assembled on electrode surface.…”

Section: Self-assembly Of L-cysteine and Characterizationmentioning

confidence: 87%

“…The modification of L-cysteine was by self-assembly [16]. The AuNPs-RGO composite modified GCE was immersed in 10 mmol L À1 L-cysteine solution.…”

Section: Fabrication Of the Sensormentioning

confidence: 99%

“…Among different chelating agents, L-cysteine has received much attention to developed sensor for the determination of Cu 2 + [11,[14][15]. L-cysteine has a high binding constant for Cu 2 + by the coordination with its acidic carboxyl and amino functional groups [16]. Thus, L-cysteine modified electrode shows excellent sensitivity and selectivity for Cu 2 + .…”

Section: Introductionmentioning

confidence: 99%

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A Self‐assembled L‐Cysteine and Electrodeposited Gold Nanoparticles‐reduced Graphene Oxide Modified Electrode for Adsorptive Stripping Determination of Copper

Zhang

Huang

et al. 2017

Electroanalysis

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Glassy carbon electrode (GCE) modified with L-cysteine and gold nanoparticles-reduced graphene oxide (AuNPs-RGO) composite was fabricated as a novel electrochemical sensor for the determination of Cu 2 + . The AuNPs-RGO composite was formed on GCE surface by electrodeposition. The L-cysteine was decorated on AuNPs by self-assembly. Physicochemical and electrochemical properties of L-cysteine/AuNPs-RGO/GCE were characterized by scanning electron microscopy, atomic force microscopy, energy dispersive spectroscopy, Raman spectroscopy, X-ray diffraction, cyclic voltammetry and adsorptive stripping voltammetry. The results validated that the prepared electrode had many attractive features, such as large electroactive area, good electrical conductivity and high sensitivity. Experimental conditions, including electrodeposition cycle, self-assembly time, electrolyte pH and preconcentration time were studied and optimized. Stripping signals obtained from L-cysteine/ AuNPs-RGO/GCE exhibited good linear relationship with Cu 2 + concentrations in the range from 2 to 60 mg L À1 , with a detection limit of 0.037 mg L À1 . Finally, the prepared electrode was applied for the determination of Cu 2 + in soil samples, and the results were in agreement with those obtained by inductively coupled plasma mass spectrometry.

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Chemisorbed Self‐Assembled Monolayers

Azzaroni

Salvarezza

2012

Supramolecular Chemistry

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A review of the fundamental aspects of chemisorbed self‐assembled monolayers (SAMs), as a tool for building complex molecular systems on solid surfaces, is presented. Using alkanethiols, SAMs, as model systems the self‐assembly, surface structures, and SAM stability under different experimental conditions are discussed. We also point out the characteristics of SAMs that make them suitable especially for building active micro‐ and nanostructured molecular systems on surfaces, and stress their limitations resulting from defects, contaminants, and disorder. Finally, we show examples of interfacial architectures drawn from supramolecular and covalent systems to illustrate the potential of SAMs as robust platforms for building functional 3D structures on solid substrates.

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Characterisation of gold electrodes modified with self-assembled monolayers of l-cysteine for the adsorptive stripping analysis of copper

Cited by 264 publications

References 35 publications

Electrochemical properties of surface-confined films of single-walled carbon nanotubes functionalised with cobalt(II)tetra-aminophthalocyanine: Electrocatalysis of sulfhydryl degradation products of V-type nerve agents

Electrochemical properties of surface-confined films of single-walled carbon nanotubes functionalised with cobalt(II)tetra-aminophthalocyanine: Electrocatalysis of sulfhydryl degradation products of V-type nerve agents

A Self‐assembled L‐Cysteine and Electrodeposited Gold Nanoparticles‐reduced Graphene Oxide Modified Electrode for Adsorptive Stripping Determination of Copper

Chemisorbed Self‐Assembled Monolayers

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