title: Centimeter-long and large-scale micropatterns of reduced graphene oxide films: fabrication and sensing applications.
abstract: Recently, the field-effect transistors (FETs) with graphene as the conducting channels have been used as a promising chemical and biological sensors. However, the lack of low cost and reliable and large-scale preparation of graphene films limits their applications. In this contribution, we report the fabrication of centimeter-long, ultrathin (1-3 nm), and electrically continuous micropatterns of highly uniform parallel arrays of reduced graphene oxide (rGO) films on various substrates including the flexible polyethylene terephthalate (PET) films by using the micromolding in capillary method. Compared to other methods for the fabrication of graphene patterns, our method is fast, facile, and substrate independent. In addition, we demonstrate that the nanoelectronic FETs based on our rGO patterns are able to label-freely detect the hormonal catecholamine molecules and their dynamic secretion from living cells.
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
authors.forename: Qiyuan
authors.initials: Q
authors.lastname: He
authors.forename: Herry Gunadi
authors.initials: HG
authors.lastname: Sudibya
authors.forename: Zongyou
authors.initials: Z
authors.lastname: Yin
authors.forename: Shixin
authors.initials: S
authors.lastname: Wu
authors.forename: Hai
authors.initials: H
authors.lastname: Li
authors.forename: Freddy
authors.initials: F
authors.lastname: Boey
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Peng
authors.initials: P
authors.lastname: Chen
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D003460:Crystallization / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry; D010316:Particle Size; D014159:Transducers; D014173:Transistors, Electronic
chemical_list: D008567:Membranes, Artificial; D010087:Oxides; D006108:Graphite