Name of the speaker: Benqiang Li
Position: Professor
Company/Organization: Xi’an Jiaotong University


The Title of Speech: Structured Nanoparticles for Biophotothermal and Energy Applications

Biography of the Speaker: Ben Q. Li received the B.S. degree from Central University, Hunan, China, in 1982, the M.S degree from Colorado School of Mines, Golden, in 1984, and the Ph.D. degree from the University of California, Berkeley, in 1989, all in mechanical engineering.He was a Research Associate at Massachusetts Institute of Technology for about a year, and a Senior Engineer at Aluminum Company of America (Alcoa) for three years before joining academia in 1994. He is currently a Professor and Chair of the Department of Mechanical Engineering, University of Michigan Dearborn, Dearborn. And he is now China's Recruitment Program of Global Experts Plan professor in Xi'an jiaotong University.
He is the author of a book and over 200 published articles and the editor of two books. He has been the invited keynote speaker at many domestic and international conferences and his research work has been supported by various federal (National Science Foundation, National Aeronautics and Space Administration, Department of Energy, Department of Defense, National Institute of Standards and Technology) and state agencies as well as private industries. His current research interests include the study of electromagnetics, fluid flow, and heat transfer in thermal-fluid systems.Prof. Li is a Fellow of the American Society for Mechanical Engineers.

Abstract of Speech:Functionally structured nanosized particles have enjoyed a wide range of applications in science and engineering systems. This talk will present the recent progress in designing and fabricating nanostructured composite particles for solar energy harvesting, high density energy storage and biothermal imaging. Mathematical models based on the quantum-translational-theory solution and the finite-difference-time-domain solution of Maxwell equations, corrected for quantum scattering of electrons, are presented, along with the use of these models to develop guidelines for designing nanostructured particles optimally tuned for photoabsorption and localized heat generation. Quantum-thermo-optical principle for nanoscaled biothermal imaging during cellular metabolism is also discussed. Under the guidance of the model predictions, composite nanoparticles with various nanostructures tailored for specific thermal and energy applications are fabricated with controlled synthesis conditions. Examples are taken from numerical simulations and experimental measurements conducted in our laboratory that illustrate these nanostructured multifunctional particles developed taking a full advantage of a combination of nanoscaled effects such as nanosize effect, nanodimensional effect, and nanostructure that demonstrate superb performance for energy extraction and storage and for biothermosensing at cellular levels. These include, but not limited to, quantum dots for nanoscaled positioning and thermal imaging, composite nanostructure, consisting of gold nanoshell covered by a silica shell layer with decorated fluorescent CdTe quantum dots, SiO2@Au@SiO2@CdTe, for simultaneous NIR-heating and temperature monitoring, nanostructured particles for 3D printing of supercapacitors and nanoparticles for enhanced performance of organic solar cells. Figures 1 and 2 show the recent results obtained for photothermal monitoring of metabolic activities in cells using the QDs nanothermometry designed and manufactured as discussed above and for enhanced solar cell energy harvesting with a configured arrangement of nanoparticles producing surface plasmonic light scatterting. Research on structured nanoparticles represents a vibrant subfield in nanotechnology where creative ideas and applications emerge constantly. The novel concept for designing and developing functionally nanostructured materials undoubtedly is shaping an even brighter future for better biosensing and energy utilization.