Preparation and application of graphene-poly (diallyldimethylammoniumchloride)-iron oxide nanoparticles buckypaper for hydrogen peroxide detection

Xueqiu You, Jeejung Kim, Youngmi Kim Pak, James Jungho Pak

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    We have reported the preparation and characterization of a novel, freestanding, paper-like graphene (G)-poly(diallyldimethylammoniumchloride) (PDDA)-Fe3O4 nanoparticles (NPs) composite. This G-based flexible buckypaper (BP) composed of stacked G-PDDA-NP platelets exhibited excellent mechanical properties, superior electrical properties, and enzyme mimetic activity, making it potentially suitable for in electrochemical sensor applications. The negatively charged NPs were immobilized on positively charged G-PDDA through the electrostatic interaction to form nanoscale G-PDDA-NP platelets, which were further assembled by flow-directed assembly to form BP. The resulting BP has macroscopic flexibility and stiffness due to the van der Waals forces between nanoscale G-PDDA-NP platelets and interlocking-tile arrangement of the platelets. The morphology and structure of the individual G-PDDA-NP platelets and the resulting BP were analyzed by using AFM, SEM and EDX. The BP was attached to an Au or Pt electrode to construct a nonenzyme H2O2 chemical sensor. The NPs acted as a "spacer" to increase the distance between the G sheets and decrease the chances of formation of a stacked graphitic structure, thereby increasing the surface area of the G electrode. The Fe3O4 NPs immobilized and embedded in the BP have intrinsic enzyme mimetic activity like natural peroxidase. The high surface area and excellent electrical conductivity of G improved the catalytic properties of NPs. The obtained H2O 2 chemical sensor exhibited prominent electrocatalytic activity towards H2O2, with a wide linear range from 10 ppm (∼0.3 μM) to 800 ppm (∼23 mM), correlation coefficient of 0.986, and a high sensitivity of 218 μA mM-1 ·cm-2. Such low-cost G-PDDA-NP composite BPs prepared by facile methods pave way towards novel sensors with better performance.

    Original languageEnglish
    Pages (from-to)7349-7357
    Number of pages9
    JournalJournal of Nanoscience and Nanotechnology
    Volume13
    Issue number11
    DOIs
    Publication statusPublished - 2013 Nov

    Keywords

    • Enzyme-free electrochemical HO sensor
    • Graphene buckypaper
    • Graphene-PDDA-iron oxide NP composite
    • Large detection range

    ASJC Scopus subject areas

    • Bioengineering
    • General Chemistry
    • Biomedical Engineering
    • General Materials Science
    • Condensed Matter Physics

    Fingerprint

    Dive into the research topics of 'Preparation and application of graphene-poly (diallyldimethylammoniumchloride)-iron oxide nanoparticles buckypaper for hydrogen peroxide detection'. Together they form a unique fingerprint.

    Cite this