Abstract: Controlled assembly of nanoscale objects into complex and functional nanostructures or superstructures is of tremendous interest. However, effective fabrication of inorganic-nanoparticle superstructures (such as nanoparticles linked by metal/alloy phases) remains a difficult challenge. This talk will discuss scientific and technological issues related to scalable nanoparticle dispersion and self-assembly in metallic liquid systems to assemble metals and nanoparticles rationally into nanocomposite superstructures for novel functionalities. Metallic nanostructures with various novel architectures were successfully fabricated. A novel methodology for rapid control of material phase growth by nanoparticles is also discovered. The rapid control of phase growth stems from a remarkable diffusion blocking on the growing phase and the resistance against coagulation imposed by nanoparticles. Considering the growing availability of numerous types and sizes of nanoparticles, our approach provides a simple, general way for a rational design and scalable nanomanufacturing of functional nanostructures with desired architectures for exciting applications
Bio: Xiaochun Li is a professor in the Department of Mechanical Engineering and Materials Science Program at University of Wisconsin-Madison (UW-Madison). He received his Ph.D. at Stanford University in 2001. He currently serves as the Director of Nano-Engineered Materials Processing Center (NEMPC) at UW-Madison. He is a holder of multiple best paper awards and patents, including five of those licensed by industry. Dr. Li received National Science Foundation CAREER award in 2002, Jiri Tlusty Outstanding Young Manufacturing Engineer Award from Society of Manufacturing Engineers in 2003, and 2008 Howard F. Taylor Award from American Foundry Society (AFS).