<p>This Special Issue of <em>Micromachines</em> titled Nanomaterials for Micro/Nanodevices comprehensively examines the intersection of nanotechnology and micro/nanodevices. This issue is a collection of ten papers that explores the cutting-edge developments and applications of nanomaterials in the fabrication and performance enhancement of micro- and nano-scale devices. As the demand for smaller faster and more efficient electronic and mechanical systems grows nanomaterials play a pivotal role in revolutionizing device engineering. Nanomaterials offer unique electrical mechanical and chemical properties that make them ideal for pushing the boundaries of micro/nanodevice performance. By advancing the interface between materials science and nanotechnology this issue showcases innovative research driving the future of micro-/nano-scale technologies. Additionally it addresses challenges such as scalability cost-effective manufacturing and material-device compatibility. These featured studies provide insights into current limitations that nanomaterials can address through interdisciplinary collaboration setting the stage for next-generation innovations in electronics energy harvesting and biomedical technologies.</p>