Research in our group centers on synthesis and assembly of hybrid nanomaterials (nanoparticles distributing on the surface of 1D or 2D nanomaterials) for advanced technological device applications, particularly in the context of sustainable energy and environment. We have developed a simple and versatile mini-arc plasma source for synthesis of nonagglomerated nanoparticles of a variety of materials with controlled size. We have also invented a dry technique to assemble nanoparticles onto various 1D or 2D nanomaterials, such as carbon nanotubes (CNTs) and graphene-based materials, with considerable control. Ongoing projects include experimental and numerical studies on plasma synthesis of nanoparticles, nanoparticle assembly, fabrication of nanomaterial-based electronic devices, CNT-nanoparticle and graphene-nanoparticle hybrid structures and their novel applications for gas sensors, water sensors, biosensors, solar cells, lithium-ion batteries, and indoor pollution control. Most of our projects are at the intersection of interesting fundamental science and industrial applications with opportunities for new discoveries, which creates an excellent vehicle for educating students.