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Sökning: WFRF:(Szafranek K.)

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1.
  • Guerova, G., et al. (författare)
  • National Status Reports
  • 2020
  • Ingår i: Advanced GNSS Tropospheric Products for Monitoring Severe Weather Events and Climate. - Cham : Springer International Publishing. - 9783030139001 ; , s. 403-481
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • In this section a summary of the national progress reports is given. GNSS4SWEC Management Committee (MC) members provided outline of the work conducted in their countries combining input from different partners involved. In the COST Action paticipated member from 32 COST countries, 1 Near Neighbour Country and 8 Intrantional Partners from Australia, Canada, Hong Kong and USA. The text reflects the state as of 1 January 2018.
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2.
  • Echtermeyer, Tim J., et al. (författare)
  • Nonvolatile switching in graphene field-effect devices
  • 2008
  • Ingår i: IEEE Electron Device Letters. - 0741-3106 .- 1558-0563. ; 29:8, s. 952-954
  • Tidskriftsartikel (refereegranskat)abstract
    • The absence of a band gap in graphene restricts its straightforward application as a channel material in field-effect transistors. In this letter, we report on a new approach to engineer a band gap in graphene field-effect devices (FEDs) by controlled structural modification of the graphene channel itself. The conductance in the FEDs is switched between a conductive "ON-state" and an insulating "OFF-state" with more than six orders of magnitude difference in conductance. Above a critical value of an electric field applied to the FED gate under certain environmental conditions, a chemical modification takes place to form insulating graphene derivatives. The effect can be reversed by electrical fields of opposite polarity or short current pulses to recover the initial state. These reversible switches could potentially be applied to nonvolatile memories and novel neuromorphic processing concepts.
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