University of Sussex
Browse
revised_manuscript_corrected..pdf (1.03 MB)

Percolating metallic structures templated on laser-deposited carbon nanofoams derived from graphene oxide: applications in humidity sensing

Download (1.03 MB)
journal contribution
posted on 2023-06-09, 12:49 authored by Sebastian Nufer, Dimitrios Fantanas, Sean OgilvieSean Ogilvie, Matthew LargeMatthew Large, Dominik J Winterauer, Jonathan P Salvage, Manuela Meloni, Alice KingAlice King, Pascale Schellenberger, Aleksey Shmeliov, Sandra Victor-Roman, Mario Pelaez-Fernandez, Ana Benito, Valeria Nicolosi, Raul Arenal, Wolfgang Maser, Adam Brunton, Alan DaltonAlan Dalton
Carbon nanofoam (CNF) is a low-density, high-surface-area material formed by aggregation of amorphous carbon nanoparticles into porous nanostructures. We report the use of a pulsed infrared laser to prepare CNF from a graphene oxide (GO) target material. Electron microscopy shows that the films consist of dendritic strings that form web-like three-dimensional structures. The conductivity of these structures can be modified by using the CNF as a nanostructured scaffold for gold nanoparticles deposited by sputter coating, controllably increasing the conductivity by up to 4 orders of magnitude. The ability to measure the conductivity of the porous structures allows electrochemical measurements in the environment. Upon decreasing humidity, the pristine CNF exhibits an increase in resistance with a quick response and recovery time. By contrast, the gold-sputtered CNF showed a decrease in resistance, indicating modification of the doping mechanism due to water adsorption. The sensitivity to humidity is eliminated at the percolation threshold of the metal on the CNF.

Funding

Enabling Excellence - Graphene based nanomaterials four touchscreen technologies: Comprehension, Commerce and Communication; G1865; EUROPEAN UNION; 642742

History

Publication status

  • Published

File Version

  • Accepted version

Journal

ACS Applied Nano Materials

ISSN

2574-0970

Publisher

American Chemical Society

Issue

4

Volume

1

Page range

1828-1835

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Materials Physics Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-04-10

First Open Access (FOA) Date

2019-03-20

First Compliant Deposit (FCD) Date

2018-04-10

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC