Abstract
In this work, suspensions of two types of graphene
nanomaterials - graphene nanoflowers (GNFs) and
multilayer graphene (MLG) flakes - were ultrasonically
sprayed into micrometer-sized droplets to directly form
films on glass and methacrylic acid copolymer
(MA)-modified glass substrates. Poly(vinylidene fluoride)
(PVDF) was added to the suspensions to enhance the
structural robustness of films. While PVDF enhanced
nanomaterial binding, the MA coating boosted nanomaterial
adhesion to the substrate. The films' morphology,
adhesion, and electrical properties were investigated.
MLG flakes produced highly irregular films, conversely
GNFs formed thinner and more uniform layers. In the case
of MLG flakes, films on MA-coated glass showed lower
resistances compared to those on glass. GNF suspensions
sprayed on MA-coated glass resulted in graphene
nanostructures embedded in a predominantly dielectric
polymer matrix. Thus, in the case of GNFs, films on glass
exhibited lower resistances compared to those on
MA-coated glass. The approach described herein can be
readily extended to create films of other graphene-based
materials on a variety of substrates.
Original language | English |
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Pages (from-to) | 45-52 |
Journal | Thin Solid Films |
Volume | 578 |
DOIs | |
Publication status | Published - 2015 |
MoE publication type | A1 Journal article-refereed |
Keywords
- graphene nanoflowers
- multi-layer graphene
- poly(vinylidene fluoride)
- ultrasonic spray
- adhesion