57876 20190520103317.0 doi 10.1039/C4NR02933J sideral 85951 ART-2014-85951 eng Wimbush, Kim S. Bias Induced Transition from an Ohmic to a Non-Ohmic Interface in Supramolecular Tunneling Junctions with Ga2O3/EGaIn Top Electrodes 2014 Access copy available to the general public Unrestricted This study describes that the current rectification ratio, R = |J|(-2.0 V)/|J|(+2.0 V) for supramolecular tunneling junctions with a top-electrode of eutectic gallium indium (EGaIn) that contains a conductive thin (0.7 nm) supporting outer oxide layer (Ga2O3), increases by up to four orders of magnitude under an applied bias of >+1.0 V up to +2.5 V; these junctions did not change their electrical characteristics when biased in the voltage range of ±1.0 V. The increase in R is caused by the presence of water and ions in the supramolecular assemblies which react with the Ga2O3/EGaIn layer and increase the thickness of the Ga2O3 layer. This increase in the oxide thickness from 0.7 nm to ~2.0 nm changed the nature of the monolayer–top-electrode contact from an ohmic to a non-ohmic contact. These results unambiguously expose the experimental conditions that allow for a safe bias window of ±1.0 V (the range of biases studies of charge transport using this technique are normally conducted) to investigate molecular effects in molecular electronic junctions with Ga2O3/EGaIn top-electrodes where electrochemical reactions are not significant. Our findings also show that the interpretation of data in studies involving applied biases of >1.0 V may be complicated by electrochemical side reactions which can be recognized by changes of the electrical characteristics as a function voltage cycling or in current retention experiments. info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 7.394 2014 MATERIALS SCIENCE, MULTIDISCIPLINARY 21 / 260 = 0.081 2014 Q1 T1 NANOSCIENCE & NANOTECHNOLOGY 10 / 80 = 0.125 2014 Q1 T1 CHEMISTRY, MULTIDISCIPLINARY 19 / 157 = 0.121 2014 Q1 T1 PHYSICS, APPLIED 12 / 144 = 0.083 2014 Q1 T1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0001-5559-8757 Fratila, Raluca M. Universidad de Zaragoza Wang, Dandan Qi, Dongchen Liang, Cao Yuan, Li Yakovlev, Nikolai Loh, Kian Ping Reinhoudt, David N. Velders, Aldrik H. Nijhuis, Christian A. 2013 765 Universidad de Zaragoza Dpto. Química Orgánica Área Química Orgánica 6, 19 (2014), 11246-58 Nanoscale NANOSCALE 2040-3364 390251 http://zaguan.unizar.es/record/57876/files/texto_completo.pdf Versión publicada 111587 http://zaguan.unizar.es/record/57876/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:57876 articulos driver 2019-05-20-10:30:24 ARTICLE