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Kim, Kwang S.
Center for Superfunctional Materials (CSM)
Research Interests
  • Theoretical/experimental nanosciences, molecular electronics spectroscopy, energy materials

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Graphene nanonet for biological sensing applications

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Title
Graphene nanonet for biological sensing applications
Author
Kim, TaekyeongPark, JaesungJin, Hye JunLee, HyungwooByun, Kyung-EunLee, Chang-SeukKim, Kwang S.Hong, Byung HeeKim, Tae HyunHong, Seunghun
Keywords
Biological sensing; Biosensing applications; Chemical functional groups; Electrical channels; Graphene nanoribbons (GNRs); High performance networks; Network structures; Selective detection
Issue Date
201309
Publisher
IOP PUBLISHING LTD
Citation
NANOTECHNOLOGY, v.24, no.37, pp. -
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.
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DOI
http://dx.doi.org/10.1088/0957-4484/24/37/375302
ISSN
0957-4484
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