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Anisotropic Conductivity at the Single-Molecule Scale.
Afsari, Sepideh; Yasini, Parisa; Peng, Haowei; Perdew, John P; Borguet, Eric.
Afiliación
  • Afsari S; Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA.
  • Yasini P; Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA.
  • Peng H; Department of Physics, Temple University, 1925 N 12th St., Philadelphia, PA, 19122, USA.
  • Perdew JP; Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA.
  • Borguet E; Department of Physics, Temple University, 1925 N 12th St., Philadelphia, PA, 19122, USA.
Angew Chem Int Ed Engl ; 58(40): 14275-14280, 2019 Oct 01.
Article en En | MEDLINE | ID: mdl-31237983
In most junctions built by wiring a single molecule between two electrodes, the electrons flow along only one axis: between the two anchoring groups. However, molecules can be anisotropic, and an orientation-dependent conductance is expected. Here, we fabricated single-molecule junctions by using the electrode potential to control the molecular orientation and access individual elements of the conductivity tensor. We measured the conductance in two directions, along the molecular plane as the benzene ring bridges two electrodes using anchoring groups (upright) and orthogonal to the molecular plane with the molecule lying flat on the substrate (planar). The perpendicular (planar) conductance is about 400 times higher than that along the molecular plane (upright). This offers a new method for designing a reversible room-temperature single-molecule electromechanical switch that controllably employs the electrode potential to orient the molecule in the junction in either "ON" or "OFF" conductance states.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania