Layer-by-layer
assembly from aqueous solutions was used to construct
multilayer thin films (<200 nm) comprising polyethylenimine and
graphene oxide. Low-temperature (175 °C) thermal reduction of
these films improved gas barrier properties (e.g., lower permeability
than SiO
x
), even under high humidity conditions,
and enhanced their electrical conductivity to 1750 S/m. The flexible
nature of the aforementioned thin films, along with their excellent
combination of transport properties, make them ideal candidates for
use in a broad range of electronics and packaging applications.
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