title: Graphene nanonet for biological sensing applications.
abstract: We report a simple but efficient method to fabricate versatile graphene nanonet (GNN)-devices. In this method, networks of V2O5 nanowires (NWs) were prepared in specific regions of single-layer graphene, and the graphene layer was selectively etched via a reactive ion etching method using the V2O5 NWs as a shadow mask. The process allowed us to prepare large scale patterns of GNN structures which were comprised of continuous networks of graphene nanoribbons (GNRs) with chemical functional groups on their edges. The GNN can be easily functionalized with biomolecules for fluorescent biochip applications. Furthermore, electrical channels based on GNN exhibited a rather high mobility and low noise compared with other network structures based on nanostructures such as carbon nanotubes, which was attributed to the continuous connection of nanoribbons in GNN structures. As a proof of concept, we built DNA sensors based on GNN channels and demonstrated the selective detection of DNA. Since our method allows us to prepare high-performance networks of GNRs over a large surface area, it should open up various practical biosensing applications.
authors: Department of Physics and Astronomy, Seoul National University, Seoul, Korea.
authors: Taekyeong
authors: T
authors: Kim
authors: Jaesung
authors: J
authors: Park
authors: Hye Jun
authors: HJ
authors: Jin
authors: Hyungwoo
authors: H
authors: Lee
authors: Kyung-Eun
authors: KE
authors: Byun
authors: Chang-Seuk
authors: CS
authors: Lee
authors: Kwang S
authors: KS
authors: Kim
authors: Byung Hee
authors: BH
authors: Hong
authors: Tae Hyun
authors: TH
authors: Kim
authors: Seunghun
authors: S
authors: Hong
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D004247:DNA / Q000378:metabolism; D004560:Electricity; D005453:Fluorescence; D006108:Graphite / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D056951:Photoelectron Spectroscopy
chemical_list: D006108:Graphite; D004247:DNA