title: Self-assembled electrical biodetector based on reduced graphene oxide.
abstract: Large-scale fabrication of graphene-based devices is an aspect of great importance for various applications including chemical and biological sensing. Toward this goal, we present here a novel chemical route for the site-specific realization of devices based on reduced graphene oxide (RGO). Electrodes patterned by photolithography are modified with amino functional groups through electrodeposition. The amine groups function as hooks for the attachment of graphene oxide flakes selectively onto the electrodes. Graphene-like electrical behavior is attained by a subsequent thermal annealing step. We show that this anchoring strategy can be scaled-up to obtain RGO devices at a wafer scale in a facile manner. The scalability of our approach coupled with the use of photolithography is promising for the rapid realization of graphene-based devices. We demonstrate one possible application of the fabricated RGO devices as electrical biosensors through the immunodetection of amyloid beta peptide.
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany. t.kurkina@fkf.mpg.de
authors.forename: Tetiana
authors.initials: T
authors.lastname: Kurkina
authors.forename: Subramanian
authors.initials: S
authors.lastname: Sundaram
authors.forename: Ravi Shankar
authors.initials: RS
authors.lastname: Sundaram
authors.forename: Francesca
authors.initials: F
authors.lastname: Re
authors.forename: Massimo
authors.initials: M
authors.lastname: Masserini
authors.forename: Klaus
authors.initials: K
authors.lastname: Kern
authors.forename: Kannan
authors.initials: K
authors.lastname: Balasubramanian
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D003217:Conductometry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D007118:Immunoassay / Q000295:instrumentation*; D036103:Nanotechnology / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry
chemical_list: D010087:Oxides; D006108:Graphite