▎ 摘　　要

Graphene, a single layer of graphite, is a unique two-dimensional electron system as well as nature's thinnest elastic membrane. Here we review and describe our work on suspended graphene devices, focusing on their extraordinary mechanical, thermal, and electronic properties. These membranes bridge the traditional divide between "soft" and "hard" condensed matter physics, and have emerged as the ultimate platforms for exploring thin film mechanics, wrinkling instability, thermal transport, and electron scattering and correlations.