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Dual Control of Molecular Conductance through pH and Potential in Single-Molecule Devices.
Brooke, Richard J; Szumski, Doug S; Vezzoli, Andrea; Higgins, Simon J; Nichols, Richard J; Schwarzacher, Walther.
Afiliación
  • Brooke RJ; H. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, United Kingdom.
  • Szumski DS; H. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, United Kingdom.
  • Vezzoli A; Department of Chemistry, University of Liverpool , Crown Street, Liverpool L69 7ZD, United Kingdom.
  • Higgins SJ; Department of Chemistry, University of Liverpool , Crown Street, Liverpool L69 7ZD, United Kingdom.
  • Nichols RJ; Department of Chemistry, University of Liverpool , Crown Street, Liverpool L69 7ZD, United Kingdom.
  • Schwarzacher W; H. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, United Kingdom.
Nano Lett ; 18(2): 1317-1322, 2018 02 14.
Article en En | MEDLINE | ID: mdl-29357253
One of the principal aims of single-molecule electronics is to create practical devices out of individual molecules. Such devices are expected to play a particularly important role as novel sensors thanks to their response to wide ranging external stimuli. Here we show that the conductance of a molecular junction can depend on two independent stimuli simultaneously. Using a scanning tunnelling microscope break-junction technique (STM-BJ), we found that the conductance of 4,4'-vinylenedipyridine (44VDP) molecular junctions with Ni contacts depends on both the electrochemically applied gate voltage and the pH of the environment. Hence, not only can the Ni|44VDP|Ni junction function as a pH-sensitive switch, but the value of the pH at which switching takes place can be tuned electrically. Furthermore, through the simultaneous control of pH and potential the STM-BJ technique delivers unique insight into the acid-base reaction, including the observation of discrete proton transfers to and from a single molecule.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2018 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2018 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos