Description: Electrolyte-Gated Graphene Ambipolar Frequency Multipliers for Biochemical Sensing

This title appears in the Scientific Report : 2016

Electrolyte-Gated Graphene Ambipolar Frequency Multipliers for Biochemical Sensing

In this Letter, the ambipolar properties of an electrolyte-gated graphene field-effect transistor (GFET) have been explored to fabricate frequency-doubling biochemical sensor devices. By biasing the ambipolar GFETs in a common-source configuration, an input sinusoidal voltage at frequency f applied...

Personal Name(s):	Fu, Wangyang (Corresponding author)
	Feng, Lingyan / Mayer, Dirk / Panaitov, Gregory / Kireev, Dmitry / Offenhäusser, Andreas / Krause, Hans-Joachim
Contributing Institute:	JARA-FIT; JARA-FIT Bioelektronik; PGI-8
Published in:	Nano letters, 16 (2016) 4, S. 2295 - 2300
Imprint:	Washington, DC ACS Publ. 2016
DOI:	10.1021/acs.nanolett.5b04729
Document Type:	Journal Article
Research Program:	Controlling Configuration-Based Phenomena
	Publikationsportal JuSER

Please use the identifier: http://dx.doi.org/10.1021/acs.nanolett.5b04729 in citations.

In this Letter, the ambipolar properties of an electrolyte-gated graphene field-effect transistor (GFET) have been explored to fabricate frequency-doubling biochemical sensor devices. By biasing the ambipolar GFETs in a common-source configuration, an input sinusoidal voltage at frequency f applied to the electrolyte gate can be rectified to a sinusoidal wave at frequency 2f at the drain electrode. The extraordinary high carrier mobility of graphene and the strong electrolyte gate coupling provide the graphene ambipolar frequency doubler an unprecedented unity gain, as well as a detection limit of ∼4 pM for 11-mer single strand DNA molecules in 1 mM PBS buffer solution. Combined with an improved drift characteristics and an enhanced low-frequency 1/f noise performance by sampling at doubled frequency, this good detection limit suggests the graphene ambipolar frequency doubler a highly promising biochemical sensing platform.