Multifunctional Polydiacetylene-Graphene Nanohybrids for Biosensor Application

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Graphene nanosheet hybridized with polydiacetylene (PDA) can be used as the electrochemical biosensor applications. Self-assembly and photo-polymerization chemistry of diacetylenic monomers on reduced graphene oxide (RGO) for non-covalent functionalization were used for high solubility and further functionality of graphene in water necessary for biosensor application. This enables regular graphene micropatterns to be formed on large substrates with chemical bonding and biological interactions. The PDA/RGO nanohybrids demonstrated the formation of conjugated polymer on graphene for fluorescence and electrochemical detection. The optical and structural properties of PDA/RGO, characterized by UV-Vis, FT-IR, Raman, and photoluminescence spectrometers, demonstrated that PDA and RGO in PDA/RGO are connected by physical interactions. Further-functionalization action of PDA/RGO with biotin was verified in microfluidic biochip via biotinstraptavidin interaction. Here, the applicability of functionalized RGO in the biochip and biosensing platform based on fluorescence detection was confirmed. The electrochemical experiments showed the potential of functionalized RGO for use as an electrochemical biosensor, especially with the detection of an analyte at low concentration.
Publisher
AMER SCIENTIFIC PUBLISHERS
Issue Date
2011-07
Language
English
Article Type
Article
Keywords

ELECTROCHEMICAL BIOSENSORS; CARBON NANOTUBES; COLORIMETRIC DETECTION; GRAPHITE OXIDE; ELECTRODE; VESICLES; DELIVERY; FILMS

Citation

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.11, no.7, pp.5663 - 5669

ISSN
1533-4880
URI
http://hdl.handle.net/10203/101293
Appears in Collection
CBE-Journal Papers(저널논문)
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