title: Conductance modulation in tetraaniline monolayers by HCl-doping and by field-enhanced dissociation of H₂O.
abstract: Oligoanilines are interesting candidates for organic electronics, as their conductivity can be varied by several orders of magnitude upon protonic doping. Here we demonstrate that tetraaniline self-assembled monolayers exhibit an unprecedented conductance on/off ratio of ∼710 (at +1 V) upon doping of the layers from the emeraldine base to the emeraldine salt form. Furthermore, a pronounced asymmetry in the current-voltage characteristics indicates dynamic doping of the tetraaniline layer by protons generated through field-enhanced dissociation of water molecules, a phenomenon known as the second Wien effect. These results point toward oligoanilines as promising substitutes for polyaniline layers in next-generation thin film devices.
authors: Materials Science Laboratory, Sony Deutschland GmbH, Hedelfinger Strasse 61, 70327 Stuttgart, Germany. William.Ford@eu.sony.com
authors: William E
authors: WE
authors: Ford
authors: Deqing
authors: D
authors: Gao
authors: Frank
authors: F
authors: Scholz
authors: Gabriele
authors: G
authors: Nelles
authors: Florian
authors: F
authors: von Wrochem