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The graphene-liquid-interface : From fundamental aspects towards chemical and biological sensing

The graphene-liquid-interface : From fundamental aspects towards chemical and biological sensing

Datum: 7. April 2016 16:00

Ort: Allmandring 3, Seminarraum 1.079

Veranstalter: ICP

The graphene-liquid-interface : From fundamental aspects towards chemical and biological sensing  

Kannan Balasubramanian, Max-Planck-Institut für Festkörperforschung, Stuttgart

Keywords: graphene, chemical functionalization, field-effect, chemical sensing, biosensors, label-freedetection
 
Monolayer graphene sheets are highly promising as active material for sensing devices directly operating in liquid. [1] In this context, one of the major challenges is to obtain control over the physics and chemistry of the graphene-liquid-interface in order to optimize the selectivity and sensitivity of such devices. Here we present our approach based on electrochemical modification to tune the properties of this interface. Through field-effect measurements in liquid along with modeling, we corroborate the physicochemical behaviour of this interface and exploit this knowledge in the realisation of chemical and biological sensors. [2] We show that we are able to perform detection of chemical species and biomolecules down to pico molar range in a label-free manner both in steady state and in real-time. [3]
 
References
1 K. Balasubramanian et al., Adv. Mater. 26, 1154 (2014).
2 L. Zuccaro et al., Sci. Rep. 5, 11794 (2015).
3 L. Zuccaro et al., ACS Nano 9, 11166 (2015).

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