Graphene Oxide/Silver Nanohybrid as Multi-functional Material for Highly Efficient Bacterial Disinfection and Detection of Organic Dye

L.T. Tam, N. X. Dinh, N. V. Cuong, N. V. Quy, T. Q. Huy, D. T. Ngo, Kristian Mølhave, A. T. Le

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    In this work, a multi-functional hybrid system consisting of graphene oxide and silver nanoparticles (GO-Ag NPs) was successfully synthesized by using a two-step chemical process. We firstly demonstrated noticeable bactericidal ability of the GO-Ag hybrid system. We provide more chemo-physical evidence explaining the antibacterial behavior of GO-Ag nanohybrid against Gram-negative Escherichia Coli and Gram-positive Staphylococcus aureus in light of ultrastructural damage analyses and Ag1+ ions release rate onto the cells/medium. A further understanding of the mode of antimicrobial action is very important for designing and developing advanced antimicrobial systems. Secondly, we have also demonstrated that the GO-Ag nanohybrid material could be used as a potential surface enhanced Raman scattering (SERS) substrate to detect and quantify organic dyes, e.g., methylene blue (MB), in aqueous media. Our findings revealed that the GO-Ag hybrid system showed better SERS performance of MB detection than that of pure Ag-NPs. MB could be detected at a concentration as low as 1 ppm. The GO-Ag-based SERS platform can be effectively used to detect trace concentrations of various types of organic dyes in aqueous media. With the aforementioned properties, the GO-Ag hybrid system is found to be very promising as a multi-functional material for advanced biomedicine and environmental monitoring applications.
    Original languageEnglish
    JournalJournal of Electronic Materials
    Volume45
    Issue number10
    Pages (from-to)5321-5333
    Number of pages13
    ISSN0361-5235
    DOIs
    Publication statusPublished - 2016

    Keywords

    • GO-Ag nanohybrid
    • Bactericidal
    • Electron microscopy
    • MB detection
    • Surface enhanced Raman scattering

    Fingerprint

    Dive into the research topics of 'Graphene Oxide/Silver Nanohybrid as Multi-functional Material for Highly Efficient Bacterial Disinfection and Detection of Organic Dye'. Together they form a unique fingerprint.

    Cite this