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  • Mesoporous Iron Oxide Synthesized Using Poly(styrene-b-acrylic acid-b-ethylene glycol) Block Copolymer Micelles as Templates for Colorimetric and Electrochemical Detection of Glucose

    Author(s)
    Tanaka, Shunsuke
    Kaneti, Yusuf Valentino
    Bhattacharjee, Ripon
    Islam, Md Nazmul
    Nakahata, Rina
    Abdullah, Nawfel
    Yusa, Shin-ichi
    Nam-Trung, Nguyen
    Shiddiky, Muhammad JA
    Yamauchi, Yusuke
    Hossain, Md Shahriar A
    Griffith University Author(s)
    Nguyen, Nam-Trung
    Shiddiky, Muhammad J.
    Year published
    2018
    Metadata
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    Abstract
    Herein, we report the soft-templated preparation of mesoporous iron oxide using an asymmetric poly(styrene-b-acrylic acid-b-ethylene glycol) (PS-b-PAA-b-PEG) triblock copolymer. This polymer forms a micelle consisting of a PS core, a PAA shell, and a PEG corona in aqueous solutions, which can serve as a soft template. The mesoporous iron oxide obtained at an optimized calcination temperature of 400 °C exhibited an average pore diameter of 39 nm, with large specific surface area and pore volume of 86.9 m2 g–1 and 0.218 cm3 g–1, respectively. The as-prepared mesoporous iron oxide materials showed intrinsic peroxidase-like ...
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    Herein, we report the soft-templated preparation of mesoporous iron oxide using an asymmetric poly(styrene-b-acrylic acid-b-ethylene glycol) (PS-b-PAA-b-PEG) triblock copolymer. This polymer forms a micelle consisting of a PS core, a PAA shell, and a PEG corona in aqueous solutions, which can serve as a soft template. The mesoporous iron oxide obtained at an optimized calcination temperature of 400 °C exhibited an average pore diameter of 39 nm, with large specific surface area and pore volume of 86.9 m2 g–1 and 0.218 cm3 g–1, respectively. The as-prepared mesoporous iron oxide materials showed intrinsic peroxidase-like activities toward the catalytic oxidation of 3,3′,5,5′-tertamethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2). This mimetic feature was further exploited to develop a simple colorimetric (naked-eye) and electrochemical assay for the detection of glucose. Both our colorimetric (naked-eye and UV–vis) and electrochemical assays estimated the glucose concentration to be in the linear range from 1.0 μM to 100 μM with a detection limit of 1.0 μM. We envisage that our integrated detection platform for H2O2 and glucose will find a wide range of applications in developing various biosensors in the field of personalized medicine, food-safety detection, environmental-pollution control, and agro-biotechnology.
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    Journal Title
    ACS Applied Materials & Interfaces
    Volume
    10
    Issue
    1
    DOI
    https://doi.org/10.1021/acsami.7b13835
    Subject
    Chemical sciences
    Engineering
    Nanobiotechnology
    Publication URI
    http://hdl.handle.net/10072/381756
    Collection
    • Journal articles

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