Graphene-based composite materials have shown to improve electronic and thermal conductivity. The dispersion of metal nanoparticles on graphene sheets potentially provides a new way to develop catalytic, magnetic, and optoelectronic materials [10]. Encapsulation of metal clusters inside multishell graphitic cages is usually achieved during carbon arc-discharge at high temperatures. Similarly, interesting graphite oxide nanosheets has also been developed by depositing metal nanoparticles [11]. Efforts have also been made to synthesize silver particles protected by graphite oxide sheets and assemble them as ultrathin films using layer-by-layer self-assembly technique.