6533b852fe1ef96bd12aae71
RESEARCH PRODUCT
Mapping of local conductivity variations on fragile nanopillar arrays by scanning conductive torsion mode microscopy.
Patrick TheatoPatrick TheatoNiko HaberkornStefan A. L. WeberRüdiger Bergersubject
NanostructureMaterials scienceSurface PropertiesBioengineeringConductivityOpticsMicroscopyMaterials TestingAluminum OxideNanotechnologyGeneral Materials ScienceNanoscopic scaleElectrical conductorNanopillarAniline CompoundsNanotubesbusiness.industryMechanical EngineeringElectric ConductivityBiasingGeneral ChemistryCondensed Matter PhysicsThermal conductionSemiconductorsMicroscopy Electron ScanningOptoelectronicsbusinessdescription
A gentle method that combines torsion mode topography imaging with conductive scanning force microscopy is presented. By applying an electrical bias voltage between tip and sample surface, changes in the local sample conductivity can be mapped. The topography and local conductivity variations on fragile free-standing nanopillar arrays were investigated. These samples were fabricated by an anodized aluminum oxide template process using a thermally cross-linked triphenylamine-derivate semicondcutor. The nanoscale characterization method is shown to be nondestructive. Individual nanopillars were clearly resolved in topography and current images that were recorded simultaneously. Local current−voltage characteristics suggest a space-charge limited conduction in the semiconducting nanopillars.
year | journal | country | edition | language |
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2010-03-19 | Nano letters |