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Effect of monovalent cations (Li + , Na + , K + , Cs + ) on self-assembly of thiol-modified double-stranded and single-stranded DNA on gold electrode

In this article we investigate the effect of monovalent cations (Li + , Na + , K + , Cs + ) on self-assembly of thiol-modified double-stranded DNA (ds-DNA) and single-stranded DNA (ss-DNA) on gold electrodes. Electrochemical characteristics (surface coverage, ion penetration and charge transfer) of... Full description

Journal Title: The Analyst 2012, Vol.137(7), pp.1680-1691
Main Author: Li, Zhiguo
Other Authors: Niu, Tianxing , Zhang, Zhenjiang , Feng, Guiying , Bi, Shuping
Format: Electronic Article Electronic Article
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ID: ISSN: 0003-2654 ; E-ISSN: 1364-5528 ; DOI: 10.1039/c2an15716k
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title: Effect of monovalent cations (Li + , Na + , K + , Cs + ) on self-assembly of thiol-modified double-stranded and single-stranded DNA on gold electrode
format: Article
creator:
  • Li, Zhiguo
  • Niu, Tianxing
  • Zhang, Zhenjiang
  • Feng, Guiying
  • Bi, Shuping
subjects:
  • Molecular Modelling
  • Enthalpy
  • Water Exchange
  • Cations
  • Self-Assembly
  • Electrodes
  • DNA
  • Potassium
  • Gold
  • Capacitance
  • Na Super(+)/K Super(+)-Exchanging Atpase
  • Free Energy
  • Water Exchange
  • Cations
  • DNA
  • Gold
  • Voltammetry
  • Electrochemistry
  • British Isles
  • Methods
ispartof: The Analyst, 2012, Vol.137(7), pp.1680-1691
description: In this article we investigate the effect of monovalent cations (Li + , Na + , K + , Cs + ) on self-assembly of thiol-modified double-stranded DNA (ds-DNA) and single-stranded DNA (ss-DNA) on gold electrodes. Electrochemical characteristics (surface coverage, ion penetration and charge transfer) of ds-DNA and ss-DNA self-assembled monolayers (SAMs) formed with different monovalent cations are inspected based on six important interfacial parameters including surface coverage ( m ), interfacial capacitance ( C ), phase angle ( 1Hz ), ion transfer resistance ( R it *), current density difference ( j ) and charge transfer resistance ( R ct ) from chronocoulometry ( CC ), cyclic voltammetry ( CV ) and electrochemical impedance spectroscopy ( EIS ). Three sections are included: (1) Investigation of the relationships of parameters ( m , C , 1Hz , R it *, j and R ct ) for ds-DNA-SAMs and ss-DNA-SAMs with cation types and concentrations; (2) confirmation and explanation of our experimental results combined with our recently proposed simple DNA model and literature reports; (3) exploration of the mechanism for the orders of monovalent cations (Li + , Na + , K + , Cs + ) on availing the adsorption of ds-DNA and ss-DNA molecules on gold based on their physicochemical parameters (ion size, solvation free energy and enthalpy, ion-water bond length and water exchange rate) and possible binding modes with DNA molecules. This work might provide a useful reference for understanding interactional mechanism of cations with DNA molecules.
language:
source:
identifier: ISSN: 0003-2654 ; E-ISSN: 1364-5528 ; DOI: 10.1039/c2an15716k
fulltext: no_fulltext
issn:
  • 0003-2654
  • 1364-5528
  • 13645528
  • 00032654
url: Link


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titleEffect of monovalent cations (Li + , Na + , K + , Cs + ) on self-assembly of thiol-modified double-stranded and single-stranded DNA on gold electrode
creatorLi, Zhiguo ; Niu, Tianxing ; Zhang, Zhenjiang ; Feng, Guiying ; Bi, Shuping
ispartofThe Analyst, 2012, Vol.137(7), pp.1680-1691
identifier
descriptionIn this article we investigate the effect of monovalent cations (Li + , Na + , K + , Cs + ) on self-assembly of thiol-modified double-stranded DNA (ds-DNA) and single-stranded DNA (ss-DNA) on gold electrodes. Electrochemical characteristics (surface coverage, ion penetration and charge transfer) of ds-DNA and ss-DNA self-assembled monolayers (SAMs) formed with different monovalent cations are inspected based on six important interfacial parameters including surface coverage ( m ), interfacial capacitance ( C ), phase angle ( 1Hz ), ion transfer resistance ( R it *), current density difference ( j ) and charge transfer resistance ( R ct ) from chronocoulometry ( CC ), cyclic voltammetry ( CV ) and electrochemical impedance spectroscopy ( EIS ). Three sections are included: (1) Investigation of the relationships of parameters ( m , C , 1Hz , R it *, j and R ct ) for ds-DNA-SAMs and ss-DNA-SAMs with cation types and concentrations; (2) confirmation and explanation of our experimental results combined with our recently proposed simple DNA model and literature reports; (3) exploration of the mechanism for the orders of monovalent cations (Li + , Na + , K + , Cs + ) on availing the adsorption of ds-DNA and ss-DNA molecules on gold based on their physicochemical parameters (ion size, solvation free energy and enthalpy, ion-water bond length and water exchange rate) and possible binding modes with DNA molecules. This work might provide a useful reference for understanding interactional mechanism of cations with DNA molecules.
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subjectMolecular Modelling ; Enthalpy ; Water Exchange ; Cations ; Self-Assembly ; Electrodes ; DNA ; Potassium ; Gold ; Capacitance ; Na Super(+)/K Super(+)-Exchanging Atpase ; Free Energy ; Water Exchange ; Cations ; DNA ; Gold ; Voltammetry ; Electrochemistry ; British Isles ; Methods;
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titleEffect of monovalent cations (Li + , Na + , K + , Cs + ) on self-assembly of thiol-modified double-stranded and single-stranded DNA on gold electrode
descriptionIn this article we investigate the effect of monovalent cations (Li + , Na + , K + , Cs + ) on self-assembly of thiol-modified double-stranded DNA (ds-DNA) and single-stranded DNA (ss-DNA) on gold electrodes. Electrochemical characteristics (surface coverage, ion penetration and charge transfer) of ds-DNA and ss-DNA self-assembled monolayers (SAMs) formed with different monovalent cations are inspected based on six important interfacial parameters including surface coverage ( m ), interfacial capacitance ( C ), phase angle ( 1Hz ), ion transfer resistance ( R it *), current density difference ( j ) and charge transfer resistance ( R ct ) from chronocoulometry ( CC ), cyclic voltammetry ( CV ) and electrochemical impedance spectroscopy ( EIS ). Three sections are included: (1) Investigation of the relationships of parameters ( m , C , 1Hz , R it *, j and R ct ) for ds-DNA-SAMs and ss-DNA-SAMs with cation types and concentrations; (2) confirmation and explanation of our experimental results combined with our recently proposed simple DNA model and literature reports; (3) exploration of the mechanism for the orders of monovalent cations (Li + , Na + , K + , Cs + ) on availing the adsorption of ds-DNA and ss-DNA molecules on gold based on their physicochemical parameters (ion size, solvation free energy and enthalpy, ion-water bond length and water exchange rate) and possible binding modes with DNA molecules. This work might provide a useful reference for understanding interactional mechanism of cations with DNA molecules.
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abstractIn this article we investigate the effect of monovalent cations (Li + , Na + , K + , Cs + ) on self-assembly of thiol-modified double-stranded DNA (ds-DNA) and single-stranded DNA (ss-DNA) on gold electrodes. Electrochemical characteristics (surface coverage, ion penetration and charge transfer) of ds-DNA and ss-DNA self-assembled monolayers (SAMs) formed with different monovalent cations are inspected based on six important interfacial parameters including surface coverage ( m ), interfacial capacitance ( C ), phase angle ( 1Hz ), ion transfer resistance ( R it *), current density difference ( j ) and charge transfer resistance ( R ct ) from chronocoulometry ( CC ), cyclic voltammetry ( CV ) and electrochemical impedance spectroscopy ( EIS ). Three sections are included: (1) Investigation of the relationships of parameters ( m , C , 1Hz , R it *, j and R ct ) for ds-DNA-SAMs and ss-DNA-SAMs with cation types and concentrations; (2) confirmation and explanation of our experimental results combined with our recently proposed simple DNA model and literature reports; (3) exploration of the mechanism for the orders of monovalent cations (Li + , Na + , K + , Cs + ) on availing the adsorption of ds-DNA and ss-DNA molecules on gold based on their physicochemical parameters (ion size, solvation free energy and enthalpy, ion-water bond length and water exchange rate) and possible binding modes with DNA molecules. This work might provide a useful reference for understanding interactional mechanism of cations with DNA molecules.
doi10.1039/c2an15716k
pages1680-1691
date2012-03-05