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    • “A label-free and highly sensitive DNA biosensor based on the core-shell structured CeO2-NR@Ppy nanocomposite for Salmonella detection”, Materials Science and Engineering: C 96 (2019) 790-797.
    Authors: Nguyen Thi Nguyet;  Advisor: -;  Co-Author: Le Thi Hai Yen; Vu Y. Doan; Nguyen Luong Hoang; Vu Van Thu; Hoang lan; Tran Trung; Vuong-Hung Pham; Phuong Dinh Tam (2019)

    A core-shell cerium oxide nanorod@polypyrrole (CeO2-NR@Ppy) nanocomposite-based electrochemical DNA biosensor was studied for Salmonella detection. The core-shell CeO2-NR@Ppy nanocomposite was prepared by in situ chemical oxidative polymerization of pyrrole monomer on CeO2-NRs, which provided a suitable platform for electrochemical DNA biosensor fabrication. The immobilization of ss-DNA sequences onto nanocompositecoated microelectrode was performed via covalent attachment method. DNA biosensor electrochemical responses were studied by cyclic voltammetry and electrochemical impedance spectroscopy with [Fe (CN)6] 3−/4− as redox probe. Under optimal conditions, DNA biosensor response showed good linearity in the range of 0.01–0.4 nM with sensitivity of 593.7 Ω·nM−1·cm−2. The low limit...