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Sökning: WFRF:(Anzi L.)

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1.
  • Aad, G., et al. (författare)
  • 2015
  • Ingår i: The European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6052. ; 75:9
  • Tidskriftsartikel (refereegranskat)
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2.
  • Anzi, L., et al. (författare)
  • Ultra-low contact resistance in graphene devices at the Dirac point
  • 2018
  • Ingår i: 2D Materials. - : IOP Publishing. - 2053-1583. ; 5:2
  • Tidskriftsartikel (refereegranskat)abstract
    • Contact resistance is one of the main factors limiting performance of short-channel graphene field-effect transistors (GFETs), preventing their use in low-voltage applications. Here we investigated the contact resistance between graphene grown by chemical vapor deposition (CVD) and different metals, and found that etching holes in graphene below the contacts consistently reduced the contact resistance, down to 23  m with Au contacts. This low contact resistance was obtained at the Dirac point of graphene, in contrast to previous studies where the lowest contact resistance was obtained at the highest carrier density in graphene (here 200  m was obtained under such conditions). The 'holey' Au contacts were implemented in GFETs which exhibited an average transconductance of 940 S m−1 at a drain bias of only 0.8 V and gate length of 500 nm, which out-perform GFETs with conventional Au contacts.
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3.
  • Vasiljevic, D.Z., et al. (författare)
  • Performance analysis of flexible ink-jet printed humidity sensors based on graphene oxide
  • 2018
  • Ingår i: IEEE Sensors Journal. - 1558-1748 .- 1530-437X. ; 18:11, s. 4378-4383
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper presents design, fabrication, and characterization of flexible capacitive graphene oxide (GO) based humidity sensors, which can be used in many applications, such as environmental protection, civil engineering, and agriculture. They consist of interdigitated electrodes ink-jet printed on a polyimide flexible substrate and GO based sensing layer. Measurement setup for testing and characterization was developed in laboratory conditions. The dependence of the capacitance and resistance of the GO based humidity sensors on the percentage of the applied humidity is presented. The main advantage of developed GO based capacitive humidity sensors is very large variation of capacitance, almost five orders of magnitude, compared with the previously demonstrated sensors. The other advantages of the sensors are fast response-recovery time, excellent reproducibility of the measurement results, and use of cost-effective additive ink-jet technology.
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