Characterization of fusion protein monolayer properties With dual-gate graphene FETs

Miika Soikkeli, Markku Kainlauri, Katri Kurppa, J. Niinistö, Sanna Arpiainen, Jussi Joensuu, Mika Prunnila, M. Ritala, M. Leskelä, M. Linder, Jouni Ahopelto

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Abstract

Biosensing devices based on graphene and nanostructures facilitate label-free detection with sensitivities beyond traditional methods. Specific biorecognition relies on selective immobilization of analytes in the close vicinity of the sensor surface. The sensitivity of the biosensor is defined by the height and polarizability of the dielectric layer that forms at the interface of graphene and the electrolyte and this layer is strongly modified by the protein structure. Even though liquid phase analysis is based on liquid gate, additional back gate under the sensing material increases the amount of information obtainable from the system. Unstability of the traditional gate dielectric, silicon dioxide, in electrolytes has turned the interest to high-k oxides. For example, HfO2 as gate dielectric reduces the gate leakage current when compared to SiO2.
Original languageEnglish
Title of host publicationBALD2014 Abstract book
Publication statusPublished - 2014
MoE publication typeNot Eligible
Event12th International Baltic Conference on Atomic Layer Deposition, Baltic ALD 2014 - Helsinki, Finland
Duration: 12 May 201413 May 2014
Conference number: 12
http://www.aldcoe.fi/bald2014/program.pdf (Program)
http://www.aldcoe.fi/bald2014/posters.pdf (Posters)

Conference

Conference12th International Baltic Conference on Atomic Layer Deposition, Baltic ALD 2014
Abbreviated titleBaltic ALD 2014
CountryFinland
CityHelsinki
Period12/05/1413/05/14
OtherAbstracts reviewed and published.
Internet address

Keywords

  • graphene
  • hydrophobin
  • fusion protein
  • biosensor
  • HfO2

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