Routine fabrication of reduced graphene oxide microarray devices via all solution processing

• Published in: Physica status solidi. A, Applications and materials science Vol. 210; no. 5; pp. 968 - 974
• Main Authors: Lanche, Ruben, Delle, Lotta E., Weil, Maryam, Vu, Xuan Thang, Pachauri, Vivek, Munief, Walid M., Wagner, Patrick, Ingebrandt, Sven
• Format: Journal Article
• Language: English
• Published: Weinheim Blackwell Publishing Ltd 01.05.2013; Wiley Subscription Services, Inc
• Subjects: Arrays; Carbon; Devices; dielectrophoresis; Electrodes; Genes; Glass substrates; Graphene; impedance spectroscopy; interdigitated electrodes; Materials science; Oxides; Routines; Sensors; Vitamin C
• ISSN: 1862-6300; 1862-6319
• DOI: 10.1002/pssa.201200910

A method for the routine fabrication of graphene (reduced graphene oxide (r‐GO)) based devices is reported. We describe a solution‐based technique for the fabrication of the devices on alternative substrates and subsequent on‐substrate processing of graphene oxide into reduced graphene oxide. As sensor platform we mainly used interdigitated gold electrodes forming microarray structures on glass substrates. Graphene oxide was site‐specifically deposited onto microelectrode arrays by dielectrophoresis followed by a solution‐based reduction of graphene oxide with L‐ascorbic acid. In order to test the r‐GO sensor stability and performance, impedance spectroscopy was used. The optimized all solution processed fabrication provides an attractive fabrication route for robust r‐GO microarray devices in a flexible, scalable and cost‐effective approach. Schematics for a microarray chip based on reduced graphene oxide.