DataVXACS Applied Nano MaterialsPaper
journal article·2018-04-27Open access

Percolating Metallic Structures Templated on Laser-Deposited Carbon Nanofoams Derived from Graphene Oxide: Applications in Humidity Sensing

Sebastian Nufer, Dimitrios Fantanas, Sean P. Ogilvie, Matthew J. Large, Dominik J. Winterauer, Jonathan P. Salvage, Manuela Meloni, Alice A. K. King, Pascale Schellenberger, Aleksey Shmeliov, Sandra Victor-Roman, Mario Pelaez-Fernandez, Valeria Nicolosi, Raul Arenal, Ana M. Benito, Wolfgang Maser, Adam Brunton, Alan B. Dalton

ACS Applied Nano Materials· Volume 1· Issue 4
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Source abstract

Abstract

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.
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Research context

Nanomaterials

OpenAlex topics: Supercapacitor Materials and Fabrication · Graphene research and applications · Carbon Nanotubes in Composites

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

M-Solv Ltd., Oxonian Park, Langford Locks, Kidlington, Oxford OX5 1FP, U.K.

Department of Physics and Astronomy, University of Sussex, Brighton BN1 9RH, U.K.

Department of Physics, University of Surrey, Guildford GU2 7XH, U.K.

Renishaw, New Mills, Wotton-under-Edge, Gloucestershire GL12 8JR, U.K.

Physics of Materials and Nanostructures, Institute des Matériaux Jean Rouxel (IMN), Nantes 44322, France

School of Pharmacy and Biomolecular Science, University of Brighton, Brighton BN2 4GJ, U.K.

School of Chemistry and CRANN, Trinity College Dublin, Dublin 2, Ireland

Instituto de Carboquimica (ICB-CSIC), E-50018 Zaragoza, Spain

Instituto de Nanociencia de Aragón, Universidad de Zaragoza, Laboratorio de Microscopias Avanzadas (LMA), 50018 Zaragoza, Spain

Fundacion ARAID, 50018 Zaragoza, Spain

Funding

European Regional Development Fund · Ministerio de Economía y Competitividad · H2020 Future and Emerging Technologies · European Social Fund · Government of Aragon

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