Graphene nanonet for biological sensing applications

We report a simple but efficient method to fabricate versatile graphene nanonet (GNN)-devices. In this method, networks of V 2 O 5 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 V 2 O 5 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 demo...

Taekyeong Kim, Jaesung Park, Hye Jun Jin, Hyungwoo Lee, Kyung-Eun Byun, Chang-Seuk Lee, Kwang S Kim, Byung Hee Hong, Tae Hyun Kim and Seunghun Hong

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