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Highly Ordered Nanoporous Carbon Films with Tunable Pore Diameters and their Excellent Sensing Properties
Author(s) -
Jia Lichao,
Lawrence Geoffrey,
Balasubramanian V. V.,
Choi Goeun,
Choy JinHo,
Abdullah Aboubakr M.,
Elzatahry Ahmed,
Ariga Katsuhiko,
Vinu Ajayan
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201404747
Subject(s) - biosensor , materials science , glucose oxidase , nanoporous , porosity , nanotechnology , chemical engineering , carbon fibers , reproducibility , chemistry , chromatography , composite material , composite number , engineering
Ordered porous carbon films with tunable pore diameters, immobilized with glucose oxidase (GOD) have been fabricated and employed for the construction of a biosensor for glucose molecules. The as‐prepared porous films have large specific surface areas and highly ordered porous structure with uniform pore sizes, which are critical for the immobilization of large amounts of GOD and support the promotion of heterogeneous electron transfer. The developed biosensors give enough room for the encapsulation of a high amount of GOD molecules and show excellent biosensing performance with a linear response to glucose concentration ranging from 0.5 to 9 m M and a detection limit of 1.5 μ M . It is also demonstrated that the sensitivity of the biosensor can be easily tuned by modulating the pore size of carbon film as it dictates the amount of immobilization of GOD in the porous channels. The fabricated carbon‐film‐based biosensor has a good stability and a high reproducibility, which opens the gateway for the commercialization of this excellent technology.