  Freestanding graphene membranes were functionalized with SnO2 nanoparticles.
A detailed procedure providing uniform coverage and chemical synthesis is
presented. Elemental composition was determined using scanning electron
microscopy combined with energy dispersive X-ray analysis. A technique called
electrostatic-manipulation scanning tunneling microscopy was used to probe the
electromechanical properties of functionalized freestanding graphene samples.
We found ten times larger movement perpendicular to the plane compared to
pristine freestanding graphene, and propose a nanoparticle encapsulation model.

Mesoscale and Nanoscale Physics