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Fundamental Properties and Applicability of Carbon Case Nanostructures : Implication for Biomolecular Sensors

Y. W. Park - Dpt of Physics & Astronomy & Nano Systems Institute-National Core Research Center, Seoul National University, Korea


Fundamental properties and applicability of carbon based nanostructures such as polymer nanofibers, carbon nanotubes and the polymer encapsulated carbon nanotubes are investigated. The results of magnetoresistance (MR) for polyacetylene nanofibers show zero MR upto 30 tesla at high electric fields which is consistent with the predicted spinless charged soliton tunneling conduction in polyacetylene. On the other hand, our measurements on polyaniline nanofibers reveal a large MR that shows no decrease in similar electric fields, which is consistent with the polaronic conduction with spin and charge in polyaniline nanofibers. An electric field modulated high magnetic field switching device can be developed as a potential application of polyacetylene nanofibers.


The applicability of carbon based nanostructures (conducting polymer nanofibers, carbon nanotubes and their composites) such as the polymer nanofiber Field Effect Transistors (FET), ansiotropic FET mobility of pentacene single crystal, PEAPOD single electron transistor (SET) and random telegraph signal (RTS), CNT gated CNT cross junction, three terminal CNT nanorelay, single molecule conduction, and polymer nanofiber encapulated CNT, are envisaged. In particular, the CNT and functionalized CNTs are deposited on top of a CMOS chip to apply for biomolecular sensors.


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