Three-dimensional graphene nanosheet encrusted carbon micropillar arrays for electrochemical sensing

Varun Penmatsa, Taekwon Kim, Majid Beidaghi, Hiroshi Kawarada, Lin Gu, Zhifeng Wang, Chunlei Wang

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    46 Citations (Scopus)

    Abstract

    Integrating graphene onto three-dimensional (3D) microelectrodes is a plausible technique to significantly improve the sensitivity of electrochemical devices. However, the construction of graphene coated 3D microstructures has been a considerable challenge. In this paper, we present a simple methodology using electrostatic spray deposition (ESD) to conformally coat graphene onto 3D carbon micropillars that are fabricated by pyrolyzing finely patterned photoresist. During the ESD, changes in the critical parameters such as substrate temperature, deposition time, and nozzle to substrate distance have shown a significant effect on the morphology of the deposited graphene film. The amperometric response of graphene/carbon micropillar electrode arrays exhibited higher electrochemical activity, improved charge transfer and a linear response towards H2O2 detection between 250 μM and 5.5 mM. The ESD technique, with the flexibility of integrating a wide variety of functional nanomaterials onto complex 3D microstructures, is attractive in the field of electrochemistry and biotechnology. This journal is

    Original languageEnglish
    Pages (from-to)3673-3678
    Number of pages6
    JournalNanoscale
    Volume4
    Issue number12
    DOIs
    Publication statusPublished - 2012 Jun 12

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    ASJC Scopus subject areas

    • Materials Science(all)

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