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dc.contributor.authorKumar, Bharat-
dc.contributor.authorSuresh, K.A.-
dc.contributor.authorBisoyi, Hari Krishna-
dc.contributor.authorKumar, Sandeep-
dc.identifier.citationNano Express, 2020, Vol.1, Article No.010006en_US
dc.descriptionOpen Accessen_US
dc.description.abstractWe have studied the nanoscale electrical conductivity of a monolayer film of a novel star shaped liquid crystalline molecule, hexatriphenylene substituted anthraquinone (AQD6). The molecule has a central core of electron deficient anthraquinone moiety connected to six electron rich triphenylene moieties by flexible alkyl chains. The monolayer formed at air-water interface was transferred onto the solid substrates by Langmuir-Blodgett (LB) technique and its surface topography was imaged using an atomic force microscope (AFM). The limiting area obtained from the surface pressure-area per molecule isotherm and the topography of the AFM images suggest that the anthraquinone moiety of the AQD6 molecule is organized in face-on configuration on the substrate and the triphenylene moieties are in edge-on configuration extended away from the substrate. We have studied the electrical conductivity of the AQD6 monolayer deposited on gold coated silicon substrate using a current sensing AFM. Analysis of current (I) − voltage (V) characteristics of the metal-monolayer film-metal junction showed a transition from direct tunneling to an injection tunneling. Further, we have estimated the barrier height and the effective mass of electron in the metal-monolayer film-metal junction.en_US
dc.publisherIOP Publishing Ltden_US
dc.rights2020 The Author(s)en_US
dc.titleTransition in nanoscale electrical conductivity in the Langmuir- Blodgett film of a novel liquid crystalline oligomeren_US
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