한빛사 논문
Lili Wanga,b,d, WeiBeng Nga,b, Joshua A. Jackmana,b, and Nam-Joon Choa,b,c,*
aSchool of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore
bCentre for Biomimetic Sensor Science , Nanyang Technological University , 50 Nanyang Drive, Singapore 637553, Singapore
cSchool of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive, Singapore 637459, Singapore
dState Key Laboratory on Integrated Optoelectronics , College of Electronic Science and Engineering , Jilin University, Changchun 130012, P. R. China
*To whom correspondence should be addressed.
Abstract
Natural cellular materials with honeycomb or foam microstructures are excellent inspirations for the biomimetic design of sensitive and robust bioelectronic interfaces. Herein, the fabrication of a hierarchical, self-assembled platform that combines a natural cellular material (Lycopodium clavatum pollen spores) with an electrically conductive material (reduced graphene oxide, defined as rGO) for the first time is reported. The spores function as natural building blocks which are functionalized with crumpled rGO and then deposited on a silicon oxide surface, yielding a 3D architecture with electroactive properties. The hybrid material design is incorporated into a field-effect transistor device and employed in an antibody-based detection scheme in order to measure the concentration of a target protein with a limit of detection of 1 × 10-15 m, which is five orders of magnitude better than a conventional rGO-based biosensor tested in comparison. The findings in this work highlight the merit of integrating natural cellular materials with electrically conductive materials, offering a framework to develop high-sensitivity bioelectronic platforms.
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