Adsorption of asparagine on the gold electrode and air/solution interface

Słojkowska, Renata; Pałys, Barbara; Jurkiewicz-Herbich, Maria

doi:10.1016/j.electacta.2004.04.004

Cited by 12 publications

(5 citation statements)

References 22 publications

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“…The capacitance drop is consequent to the formation of an organic adsorbed film, which causes an increase of the double layer thickness with consequent decrease of its charge storage. The above finding perfectly agrees with a recent literature report whereby amino acids such as asparagine and tyrosine are very strongly adsorbed on a gold electrode from 0.1 M LiClO 4 aqueous solutions [Słojkowska et al, 2004 and references therein]: indeed, asparagines and tyrosine were among the amino acids ICR responsive in the original Zhadin paper [Novikov and Zhadin, 1994].…”

Section: Electrochemical Characteristics Of the Zhadin Systemsupporting

confidence: 89%

Dynamics of the ion cyclotron resonance effect on amino acids adsorbed at the interfaces

Comisso

Giudice

Ninno

et al. 2005

Bioelectromagnetics

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In this study we show a reproduction of the Zhadin experiment, which consists of the transient increase of the electrolytic current flow across an aqueous solution of L-arginine and L-glutamic acid induced by a proper low frequency alternating magnetic field superimposed to a static magnetic field of higher strength. We have identified the mechanisms that were at the origin of the so-far poor reproducibility of the above effect: the state of polarization of the electrode turned out to be a key parameter. The electrochemical investigation of the system shows that the observed phenomenon involves the transitory activation of the anode due to ion cyclotron frequency effect, followed again by anode passivation due to the adsorption of amino acid and its oxidation products. The likely occurrence of similar ion cyclotron resonance (ICR) phenomena at biological membranes, the implications on ion circulation in living matter, and the consequent biological impact of environmental magnetic fields are eventually discussed.

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Section: Electrochemical Characteristics Of the Zhadin Systemsupporting

confidence: 89%

Dynamics of the ion cyclotron resonance effect on amino acids adsorbed at the interfaces

Comisso

Giudice

Ninno

et al. 2005

Bioelectromagnetics

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“…We employed the Au(111) surface for modeling because of its importance in the field of proteinsurface interactions, both for fundamental studies (well-characterized, stable surface in both air and water) and for potential applications (e.g., contacts in nanobioelectronics and optical detection systems). Moreover, extensive theoretical investigations of small organic molecules adsorbed on gold, 1,7,20,[27][28][29] as well as experimental data on protein and peptide adsorption, 3,5,7 are available and can be used for model optimization and validation. The present energy function is designed for use in Brownian Dynamics (BD) simulations of protein adsorption to surfaces but is not limited to this application.…”

Section: Introductionmentioning

confidence: 99%

“…The natural choice of such small systems is a set of amino acids whose binding to metal surfaces has been analyzed using MD simulations 28,29 and can also be related to available experimental studies. 1,5,7,9 For the sake of consistency, we used the same gold surface representation, amino acid structures, and force field parameters as used previously in the MD simulations. 28,29 We also employed the same image-charge model and water force field in the MD simulations with explicit water molecules performed to support the development of the continuum approach presented here.…”

Section: Introductionmentioning

confidence: 99%

ProMetCS: An Atomistic Force Field for Modeling Protein−Metal Surface Interactions in a Continuum Aqueous Solvent

Kokh

Corni

Winn

et al. 2010

J. Chem. Theory Comput.

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In order to study protein-inorganic surface association processes, we have developed a physics-based energy model, the ProMetCS model, which describes protein-surface interactions at the atomistic level while treating the solvent as a continuum. Here, we present an approach to modeling the interaction of a protein with an atomically flat Au(111) surface in an aqueous solvent. Protein-gold interactions are modeled as the sum of van der Waals, weak chemisorption, and electrostatic interactions, as well as the change in free energy due to partial desolvation of the protein and the metal surface upon association. This desolvation energy includes the effects of water-protein, water-surface, and water-water interactions and has been parametrized using molecular dynamics (MD) simulations of water molecules and a test atom at a gold-water interface. The proposed procedure for computing the energy terms is mostly grid-based and is therefore efficient for application to long-time simulations of protein binding processes. The approach was tested for capped amino acid residues whose potentials of mean force for binding to a gold surface were computed and compared with those obtained previously in MD simulations with water treated explicitly. Calculations show good quantitative agreement with the results from MD simulations for all but one amino acid (Trp), as well as correspondence with available experimental data on the adhesion properties of amino acids.

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“…Adsorption of L-histidine (His) has been studied [142] in aqueous KF and LiClO 4 solutions on mercury electrode and at air/solution interface. The strongest adsorption of His on Hg electrode was observed in solutions of pH ≥ 8.…”

Section: Organic Nitrogen Compoundsmentioning

confidence: 99%

Electrochemistry of Mercury

Orlik

Galus

2006

Encyclopedia of Electrochemistry

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The sections in this article are Double‐layer Properties of Hg /Water Interface Potential of Zero Charge Surface Charge Density and Capacitive Current Experimental and Theoretical Studies of the Hg /Water Interface Double‐layer Properties of Hg /Nonaqueous Media Interface Adsorption and Electrode Reactions at Hg Surface Deposition and Underpotential Deposition of Hg on Various Electrodes Underpotential Deposition of Mercury on Gold Electrodes Film Electrodes and Related Hg Electrodes Adsorption and Electrode Reactions of Inorganic Ions and Coordination Compounds of Metal Ions Analytical Applications Adsorption and Electrode Reactions Involving Organic Compounds Organic Compounds Containing Sulfur, Selenium, and Tellurium Organic Nitrogen Compounds Indicators and Dyes Vitamins and Antibiotics Enzymes and Coenzymes Other Organic Compounds Analytical Aspects of Adsorption of Organic Compounds Ammonium and Quaternary‐substituted Ammonium Amalgams

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Adsorption of asparagine on the gold electrode and air/solution interface

Cited by 12 publications

References 22 publications

Dynamics of the ion cyclotron resonance effect on amino acids adsorbed at the interfaces

Dynamics of the ion cyclotron resonance effect on amino acids adsorbed at the interfaces

ProMetCS: An Atomistic Force Field for Modeling Protein−Metal Surface Interactions in a Continuum Aqueous Solvent

Electrochemistry of Mercury

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