0000000000546746

AUTHOR

Rorijs Dobulans

showing 2 related works from this author

Studies of host-guest thin films of corona-poled betaine-type polar molecules by kelvin probe technique and atomic force microscopy

2004

In this work betaine-type molecules were investigated. As a result of the asymmetry of charge distribution, molecules possess in the ground state a considerable permanent dipole moment. The decay of surface potential of poled polymer films is dependent at least on two relaxation processes. The influence of glass transition of PMMA on thermal dependence of the surface potential is shown. The transition temperature, where no changes of the surface potential appeared, is related to glass transition temperature of the host-guest system. The topography of the film surface was obtained by AFM.

Kelvin probe force microscopePolymers and Plasticsbusiness.industryChemistryChemical polarityTransition temperatureOrganic ChemistryRelaxation (NMR)Charge densityCondensed Matter PhysicsCorona polingDipoleOpticsChemical physicsMaterials ChemistrybusinessGlass transitionMacromolecular Symposia
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A Novel Gas Sensor Transducer Based on Phthalocyanine Heterojunction Devices

2007

Abstract: Experimental data concerning the changes in the current-voltage (I-V) perfor-mances of a molecular material-based heterojunction consisting of hexadecafluorinated nickel phthalocyanine (Ni(F 16 Pc)) and nickel phthalocyanine (NiPc), (Au|Ni(F 16 Pc)|NiPc|Al) are introduced as an unprecedented principle of transduction for gas sensing performances. The respective n - and p -type doped-insulator behaviors of the respective materials are supported, owing to the observed changes in surface potential (using the Kelvin probe method) after submission to electron donor (ammonia) and electron acceptor gases (ozone). On the other hand, the bilayer device exhibits strong variations in the bui…

NanotechnologyElectron donorlcsh:Chemical technologyBiochemistryFull Research PaperAnalytical Chemistrygas sensorchemistry.chemical_compoundlcsh:TP1-1185Electrical and Electronic Engineeringorganic heterojunctionmolecular materialsInstrumentationmolecular materials; phthalocyanine; organic heterojunction; gas sensor; transduction.chemistry.chemical_classificationKelvin probe force microscopeResistive touchscreenbusiness.industryBilayerDopingHeterojunctionElectron acceptortransductionAtomic and Molecular Physics and OpticsphthalocyaninechemistryPhthalocyanineOptoelectronicstransduction.businessSensors (Basel, Switzerland)
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