报告题目：Laser-induced nanobullets for additive nanofabrication and sensing
Nanomaterials with component particle sizes in the range of a few to hundreds of nanometers can exhibit intriguing and extraordinary properties compared to their bulk counterparts. In addition to the well-known example of nano-gold appearing ruby red instead of the familiar yellow of bulk gold, the striking properties of nanomaterials provide tremendous opportunities for many new applications. The precise control and manipulation of nanomaterials at the single-particle level are an area of active interest. Two methods can be used for this purpose:
A “laser-induced nano-bullet” for additive nanofabrication: This method enables selective release of a single nanoparticle in the air and additive transfer of it from one substrate to another substrate. In-plane and out-of-plane nano-dimers with sub-5nm gaps have been fabricated with this method.
A “laser-induced surface bubble” for particle manipulation and sensing: A laser-induced surface bubble is used to rapid fabricate SERS substrate for ultrasensitive sensing.
Chenglong Zhao is an assistant professor with joint appointments in the Department of Physics and the Department of Electro-Optics and Photonics at the University of Dayton of United States. He received his Ph.D. from Peking University (Beijing, China), and carried out postdoctoral research at the Pennsylvania State University and the National Institute of Standards and Technology (NIST). Prof. Zhao has authored and co-authored over 30 journal papers. His research findings have been widely reported by Science Daily, Physics News, National Science Foundation, Science Codex, Science News, Nano Werk, etc.