Electrochemical quartz-crystal microbalance study of silver and copper electrodeposition on bare and iodine-covered platinum electrodes

Jeffrey, Craig A.; Storr, Wendy M.; Harrington, David A.

doi:10.1016/j.jelechem.2004.02.014

Cited by 9 publications

(6 citation statements)

References 38 publications

(57 reference statements)

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“…Stripping voltammetry of silver nanoparticles, in dissolution in an electrolyte solution, was carried out using a 25 µm diameter platinum ultramicroelectrode. To detect silver (I) electrochemically at low concentrations, it is necessary to electro-deposit silver onto the electrode surface in a pre-concentration step by holding the potential of the electrode at −0.3 V versus Ag/AgCl for 60 s [18]. This procedure reduces Ag + to Ag 0 , which plates onto the electrode surface.…”

Section: Methodsmentioning

confidence: 99%

The bactericidal effect of silver nanoparticles

et al. 2005

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Nanotechnology is expected to open new avenues to fight and prevent disease using atomic scale tailoring of materials. Among the most promising nanomaterials with antibacterial properties are metallic nanoparticles, which exhibit increased chemical activity due to their large surface to volume ratios and crystallographic surface structure. The study of bactericidal nanomaterials is particularly timely considering the recent increase of new resistant strains of bacteria to the most potent antibiotics. This has promoted research in the well known activity of silver ions and silver-based compounds, including silver nanoparticles. The present work studies the effect of silver nanoparticles in the range of 1-100 nm on Gram-negative bacteria using high angle annular dark field (HAADF) scanning transmission electron microscopy (STEM). Our results indicate that the bactericidal properties of the nanoparticles are size dependent, since the only nanoparticles that present a direct interaction with the bacteria preferentially have a diameter of approximately 1-10 nm.

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Section: Methodsmentioning

confidence: 99%

The bactericidal effect of silver nanoparticles

et al. 2005

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“…Thus, it has been often utilized for the in situ analysis of plating, corrosion, modified electrodes, and chemical sensors. [18][19][20][21][22][23][24] The frequency change related to the mass change ͑⌬m͒ in the quartz crystal electrode, ⌬f m , is expressed by the Sauerbrey equation 25…”

Section: Theorymentioning

confidence: 99%

EQCM Measurement of Ag(I)∕Ag Reaction in an Amide-Type Room-Temperature Ionic Liquid

Serizawa¹,

Katayama²,

Miura³

2009

J. Electrochem. Soc.

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Electrodeposition of silver was investigated using an impedance technique (separately excited, passive technique) electrochemical quartz crystal microbalance (EQCM) in a room-temperature ionic liquid. The mass changes during silver deposition and dissolution were observed with the current efficiencies of nearly 100% during potential sweep, constant potential step, and constant current step experiments. The product of the viscosity and density of the electrolyte near the electrode, ηnormalLρnormalL , can be estimated by the resonance resistance, which can be monitored simultaneously with the resonance frequency. The change in the ηnormalLρnormalL value during silver deposition was consistent with the change in the calculated concentration of Ag(I) near the electrode. During the outer-sphere electron-transfer reaction between ferrocenium and ferrocene, no significant changes in the mass and the ηnormalLρnormalL value were observed.

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“…In the case of silver, the cyclic voltammogram of the coated electrode in supporting electrolyte is very simple, showing one deposition and one stripping process in the negative-and positivegoing sweeps, respectively. For copper, the presence of the iodine layer mediates interactions between the analyte and the electrolyte to a lesser extent due to both the formation of copper islands on the surface and the interaction between the copper and the halogen film [46].…”

Section: Resultsmentioning

confidence: 99%

Anodic Stripping Voltammetric Determination Of Copper In Multivitamin-Mineral Formulations Using Iodine-Coated Platinum Electrode

Amayreh

Hourani²,

Hourani

2021

MOCA

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In this work, the utilization of the modified iodine-coated polycrystalline platinum electrode as a voltammetric sensor for copper determination in pharmaceutical formulations was reported. The optimized experimental parameters for the determination of copper were using 0.1M KCl as a supporting electrolyte with a scan rate of 50 mV/s, deposition potential of - 0.2 V, and a deposition time of 2 minutes. The anodic peak related to Copper oxidation is centered at about + 0.05 V. The extended detected linear range for the developed method was between 1 ppm and 100 ppm. The anodic current showed excellent linearity with R2 = 0.9986. The limit of detection (LOD) and limit of quantitation (LOQ) were 0.115 ppm and 0.346 ppm, respectively, which attests to the sensitivity of the method. The investigation for the effect of potential interferences from multivitamins tablet ingredients indicated a specific selectivity toward copper and the absence of any electrochemical response toward these components. The developed method was successfully applied to analyze copper and the obtained results were in good agreement with the labeled values, besides that, the statistical tests indicated no significant difference at p = 0.05 with 95 % confidence level.

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Electrochemical quartz-crystal microbalance study of silver and copper electrodeposition on bare and iodine-covered platinum electrodes

Cited by 9 publications

References 38 publications

The bactericidal effect of silver nanoparticles

The bactericidal effect of silver nanoparticles

EQCM Measurement of Ag(I)∕Ag Reaction in an Amide-Type Room-Temperature Ionic Liquid

Anodic Stripping Voltammetric Determination Of Copper In Multivitamin-Mineral Formulations Using Iodine-Coated Platinum Electrode

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