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A facile, cost-effective and two-step strategy is developed to fabricate a nanoporous graphene (Gr) thin film for enhanced gas sensing at room temperature. Microwave plasma enhanced chemical vapor deposition (MPCVD) is first exploited to synthesize 3D Gr spherical structures, which are subsequently fragmented by ultrasonic treatment in liquid. Deposition of the fragmented 3D Gr structures on a substrate...
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