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Nernstian performance of the optical response of monolayer-protected gold cluster films

Identifieur interne : 008770 ( Main/Repository ); précédent : 008769; suivant : 008771

Nernstian performance of the optical response of monolayer-protected gold cluster films

Auteurs : RBID : Pascal:06-0364705

Descripteurs français

Pascal (Inist)
- Etude expérimentale, Particule sous micronique, Particule métallique, Agrégat métallique, Or, Couche monomoléculaire, Alcanethiol, Propriété optique, Coefficient absorption, Propriété électrochimique, Potentiel oxydoréduction, Voltammétrie cyclique, Hexanethiol.
Wicri :
- concept : Or.

English descriptors

KwdEn :
- Absorption coefficient, Alkanethiol, Cyclic voltammetry, Electrochemical properties, Experimental study, Gold, Metal cluster, Metal particle, Monolayer, Optical properties, Redox potential, Submicron particle.

Abstract

Multilayer films of Au₁₄₇ hexanethiolate monolayer-protected clusters (C6-Au MPCs) of 1.6-nm diameter cores were formed onto indium tin oxide electrodes and the film optical changes arising from sequential single electron removal from the MPC cores in aqueous solutions were followed by UV-vis absorption spectroelectrochemistry. The film absorbance was found to increase proportionally to the MPC core anodic charge up to MPC⁺⁵ during the voltammetric scans. When the potential was swept at sufficiently slow scan rates, it was possible to resolve a staircase-shaped curve increment of absorbance with potential. This incremental increase of absorbance, concurrent with each anodic charging event, evidenced that the spectral changes were induced by the discrete charging of the MPCs. The values of the formal potential (E⁰') and number of electrons (n) transferred in each charging step were determined from the voltabsorptometric measurements working in conditions close to the equilibrium, where Nernst equation can be applied. This spectroscopic approach yielded n = 1 and £ ° values comparable to the voltammetric ones for charging steps up to MPC⁺⁵, further proving that the observed spectral features were intimately linked to the quantized capacitance charging of these tiny capacitors.

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Pascal:06-0364705

Le document en format XML

<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Nernstian performance of the optical response of monolayer-protected gold cluster films</title>
<author><name sortKey="Ruiz, Virginia" uniqKey="Ruiz V">Virginia Ruiz</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Quimica, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n</s1>
<s2>09001 Burgos</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Espagne</country>
<placeName><region nuts="2" type="communauté">Castille-et-León</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Colina, Alvaro" uniqKey="Colina A">Alvaro Colina</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Quimica, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n</s1>
<s2>09001 Burgos</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Espagne</country>
<placeName><region nuts="2" type="communauté">Castille-et-León</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Aranzazu Heras, M" uniqKey="Aranzazu Heras M">M. Aranzazu Heras</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Quimica, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n</s1>
<s2>09001 Burgos</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Espagne</country>
<placeName><region nuts="2" type="communauté">Castille-et-León</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Lopez Palacios, Jesus" uniqKey="Lopez Palacios J">Jesus Lopez-Palacios</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Quimica, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n</s1>
<s2>09001 Burgos</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Espagne</country>
<placeName><region nuts="2" type="communauté">Castille-et-León</region>
</placeName>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="inist">06-0364705</idno>
<date when="2006">2006</date>
<idno type="stanalyst">PASCAL 06-0364705 INIST</idno>
<idno type="RBID">Pascal:06-0364705</idno>
<idno type="wicri:Area/Main/Corpus">008B93</idno>
<idno type="wicri:Area/Main/Repository">008770</idno>
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<seriesStmt><idno type="ISSN">1388-2481</idno>
<title level="j" type="abbreviated">Electrochem. commun.</title>
<title level="j" type="main">Electrochemistry communications</title>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Absorption coefficient</term>
<term>Alkanethiol</term>
<term>Cyclic voltammetry</term>
<term>Electrochemical properties</term>
<term>Experimental study</term>
<term>Gold</term>
<term>Metal cluster</term>
<term>Metal particle</term>
<term>Monolayer</term>
<term>Optical properties</term>
<term>Redox potential</term>
<term>Submicron particle</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Etude expérimentale</term>
<term>Particule sous micronique</term>
<term>Particule métallique</term>
<term>Agrégat métallique</term>
<term>Or</term>
<term>Couche monomoléculaire</term>
<term>Alcanethiol</term>
<term>Propriété optique</term>
<term>Coefficient absorption</term>
<term>Propriété électrochimique</term>
<term>Potentiel oxydoréduction</term>
<term>Voltammétrie cyclique</term>
<term>Hexanethiol</term>
</keywords>
<keywords scheme="Wicri" type="concept" xml:lang="fr"><term>Or</term>
</keywords>
</textClass>
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<front><div type="abstract" xml:lang="en">Multilayer films of Au<sub>147</sub>
 hexanethiolate monolayer-protected clusters (C6-Au MPCs) of 1.6-nm diameter cores were formed onto indium tin oxide electrodes and the film optical changes arising from sequential single electron removal from the MPC cores in aqueous solutions were followed by UV-vis absorption spectroelectrochemistry. The film absorbance was found to increase proportionally to the MPC core anodic charge up to MPC<sup>+5</sup>
 during the voltammetric scans. When the potential was swept at sufficiently slow scan rates, it was possible to resolve a staircase-shaped curve increment of absorbance with potential. This incremental increase of absorbance, concurrent with each anodic charging event, evidenced that the spectral changes were induced by the discrete charging of the MPCs. The values of the formal potential (E<sup>0</sup>
') and number of electrons (n) transferred in each charging step were determined from the voltabsorptometric measurements working in conditions close to the equilibrium, where Nernst equation can be applied. This spectroscopic approach yielded n = 1 and £ ° values comparable to the voltammetric ones for charging steps up to MPC<sup>+5</sup>
, further proving that the observed spectral features were intimately linked to the quantized capacitance charging of these tiny capacitors.</div>
</front>
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<fA06><s2>5</s2>
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<fA08 i1="01" i2="1" l="ENG"><s1>Nernstian performance of the optical response of monolayer-protected gold cluster films</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>RUIZ (Virginia)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>COLINA (Alvaro)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>ARANZAZU HERAS (M.)</s1>
</fA11>
<fA11 i1="04" i2="1"><s1>LOPEZ-PALACIOS (Jesus)</s1>
</fA11>
<fA14 i1="01"><s1>Departamento de Quimica, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n</s1>
<s2>09001 Burgos</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</fA14>
<fA20><s1>863-868</s1>
</fA20>
<fA21><s1>2006</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>26863</s2>
<s5>354000115426940330</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2006 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>34 ref.</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>06-0364705</s0>
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<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
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<fA64 i1="01" i2="1"><s0>Electrochemistry communications</s0>
</fA64>
<fA66 i1="01"><s0>NLD</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>Multilayer films of Au<sub>147</sub>
 hexanethiolate monolayer-protected clusters (C6-Au MPCs) of 1.6-nm diameter cores were formed onto indium tin oxide electrodes and the film optical changes arising from sequential single electron removal from the MPC cores in aqueous solutions were followed by UV-vis absorption spectroelectrochemistry. The film absorbance was found to increase proportionally to the MPC core anodic charge up to MPC<sup>+5</sup>
 during the voltammetric scans. When the potential was swept at sufficiently slow scan rates, it was possible to resolve a staircase-shaped curve increment of absorbance with potential. This incremental increase of absorbance, concurrent with each anodic charging event, evidenced that the spectral changes were induced by the discrete charging of the MPCs. The values of the formal potential (E<sup>0</sup>
') and number of electrons (n) transferred in each charging step were determined from the voltabsorptometric measurements working in conditions close to the equilibrium, where Nernst equation can be applied. This spectroscopic approach yielded n = 1 and £ ° values comparable to the voltammetric ones for charging steps up to MPC<sup>+5</sup>
, further proving that the observed spectral features were intimately linked to the quantized capacitance charging of these tiny capacitors.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>001C01J02</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Etude expérimentale</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Experimental study</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Estudio experimental</s0>
<s5>01</s5>
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<fC03 i1="02" i2="X" l="FRE"><s0>Particule sous micronique</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Submicron particle</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Partícula submicrónica</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Particule métallique</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Metal particle</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Partícula metálica</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Agrégat métallique</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Metal cluster</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Agregado metálico</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Or</s0>
<s2>NC</s2>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Gold</s0>
<s2>NC</s2>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Oro</s0>
<s2>NC</s2>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Couche monomoléculaire</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Monolayer</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Capa monomolecular</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Alcanethiol</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Alkanethiol</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Alcanotiol</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Propriété optique</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Optical properties</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Propiedad óptica</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Coefficient absorption</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Absorption coefficient</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Coeficiente absorción</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Propriété électrochimique</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Electrochemical properties</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Propiedad electroquímica</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Potentiel oxydoréduction</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Redox potential</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Potencial redox</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Voltammétrie cyclique</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Cyclic voltammetry</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Voltametría cíclica</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Hexanethiol</s0>
<s2>NK</s2>
<s4>INC</s4>
<s5>32</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Métal transition</s0>
<s2>NC</s2>
<s5>05</s5>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Transition metal</s0>
<s2>NC</s2>
<s5>05</s5>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Metal transición</s0>
<s2>NC</s2>
<s5>05</s5>
</fC07>
<fN21><s1>240</s1>
</fN21>
<fN44 i1="01"><s1>PSI</s1>
</fN44>
<fN82><s1>PSI</s1>
</fN82>
</pA>
</standard>
</inist>
</record>

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Nernstian performance of the optical response of monolayer-protected gold cluster films

Nernstian performance of the optical response of monolayer-protected gold cluster films

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri