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Proceedings 2017, 1(4), 508; doi:10.3390/proceedings1040508

Vertical 3D GaN Nanoarchitectures towards an Integrated Optoelectronic Biosensing Platform in Microbial Fuel Cells

1
Institute of Semiconductor Technology (IHT), TU Braunschweig, 2, 38106 Braunschweig, Germany
2
Laboratory for Emerging Nanometrology (LENA), TU Braunschweig, 2, 38106 Braunschweig, Germany
3
Institute of Environmental and Sustainable Chemistry (IÖNC), TU Braunschweig, 2, 38106 Braunschweig, Germany
4
MIND-IN2UB, Department of Engineering-Electronics, University of Barcelona, 585, 08007 Barcelona, Spain
Presented at the Eurosensors 2017, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 4 August 2017
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Abstract

An integrated nano-optoelectronic biological sensor system is developed to obtain insights of the biochemical and physical processes of Geobacter sulfurreducens-based biofilm growth inside a miniaturized microbial fuel cell (MFC) reactor. Gallium nitride (GaN), which was used as a novel electrode material, has been investigated in terms of its biocompatibility and performance to transport the electrons delivered by the microorganisms. Moreover, in order to enhance the produced current density, vertical 3D GaN nanoarchitectures (i.e., arrays of nanowires and nanofins) with larger surface-to-volume ratios were fabricated using a top-down nanomachining method involving nanolithography and hybrid etching technique.
Keywords: microbial fuel cell (MFC); electrochemically active biofilms; gallium nitride; biocompatibility; nanowires; optoelectronic integrated microchip microbial fuel cell (MFC); electrochemically active biofilms; gallium nitride; biocompatibility; nanowires; optoelectronic integrated microchip
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Boht, H.; Wichmann, H.; Scholz, G.; Yu, F.; Strempel, K.; Mariana, S.; Fatahilah, M.F.; Clavero, I.M.; Prades, J.D.; Schröder, U.; Wasisto, H.S.; Waag, A. Vertical 3D GaN Nanoarchitectures towards an Integrated Optoelectronic Biosensing Platform in Microbial Fuel Cells. Proceedings 2017, 1, 508.

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