Self-Assembly of Monolayer-Coated Silver Nanoparticles on Gold Electrodes. An Electrochemical Investigation

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Title:Self-Assembly of Monolayer-Coated Silver Nanoparticles on Gold Electrodes. An Electrochemical Investigation
Creators:
Marcaccio, Massimo
Margotti, Massimo
Montalti, Marco
Paolucci, Francesco
Prodi, Luca
Zaccheroni, Nelsi
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 68, 8, pp. 1395-1406
Uncontrolled Keywords:Self assembled monolayers, Cyclic voltammetry, Silver nanoparticles, Electrochemical impedance spectroscopy, Electrochemistry

Abstract

Redox behaviour of an array of dodecanethiol-coated silver nanoparticles, self-assembled on the gold electrode surface by dithiol linkers, is dominated in aqueous electrolytes by a reversible faradaic process that has been attributed to the anodic oxidation of silver nanoparticles. The nanoparticle array may be switched between the oxidised and reduced states repeatedly without any significant loss of electroactive material, thus showing a remarkable stability under electrochemical conditions. The mainly capacitive high-frequency electrical response of the nanoparticle array/electrolyte interface is characterised by a low value of capacitance, typical of a self assembled monolayer (SAM) of long-chain alkanethiols on gold; it has been associated with the compact organic layer interposed between the nanoparticles and the gold substrate. At lower frequencies, the interface displays a poorer electrical behaviour with both capacitive and resistive elements, which was associated with the more disordered organic layer located on the outer side of the film. <p>

Title:Self-Assembly of Monolayer-Coated Silver Nanoparticles on Gold Electrodes. An Electrochemical Investigation
Creators:
Marcaccio, Massimo
Margotti, Massimo
Montalti, Marco
Paolucci, Francesco
Prodi, Luca
Zaccheroni, Nelsi
Uncontrolled Keywords:Self assembled monolayers, Cyclic voltammetry, Silver nanoparticles, Electrochemical impedance spectroscopy, Electrochemistry
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:68
Number:8
Page Range:pp. 1395-1406
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20031395UNSPECIFIED
ID Code:2126
Item Type:Article
Deposited On:06 Feb 2009 17:15
Last Modified:06 Feb 2009 16:15

Citation

Marcaccio, Massimo; Margotti, Massimo; Montalti, Marco; Paolucci, Francesco; Prodi, Luca; Zaccheroni, Nelsi (2003) Self-Assembly of Monolayer-Coated Silver Nanoparticles on Gold Electrodes. An Electrochemical Investigation. Collection of Czechoslovak Chemical Communications, 68 (8). pp. 1395-1406. ISSN 0010-0765

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