Journal
MATERIALS LETTERS
Volume 159, Issue -, Pages 261-264Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.06.117
Keywords
Electrophoretic deposition; Graphene foam; Carbon nanotubes; Polymethylmethacrylate; 2D Materials; Porous materials
Funding
- National Science Foundation under CMMI Grant [1400424]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1400424] Funding Source: National Science Foundation
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Graphene materials, including three-dimensional foams, are commonly transferred from growth substrates using polymer stabilization processes. Even after harsh chemical and annealing treatments to remove the polymer, residues remain which compromise the electronic, thermal, gravimetric, and chemical properties of the graphene. To overcome this, we present a scalable, clean approach to stabilize graphene foams by conformal electrophoretic deposition of web-like networks of surfactant-free single-walled carbon nanotubes directly from polar solvents. We demonstrate these coatings to yield a pristine stabilized graphene material exhibiting 50x lower electrical resistance and a 10 cm(-1) optical red-shift in the Raman G' double resonance mode in comparison to polymer-stabilized graphene. This approach enables the formation of three-dimensional architectures of nanomaterials without the adverse effects associated with residual impurities from polymer and chemical processing. (C) 2015 Elsevier B.V. All rights reserved.
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