報告題目：Novel nanoscience in superfluid helium droplets: from spherical nanoparticles to nanowires

報 告 人：Shengfu Yang （University of Leicester）

報告時間：2015年6月26日上午10：00

報告地點：化學(xué)樓二樓一號會議室

報告人簡介：

Prof. Yang has worked in several world-class laboratories in China (USTC), France (Université Joseph Fourier), United States (MIT) and Finland (University of Helsinki). He joined the University of Leicester in 2003 and was awarded a prestigious EPSRC Advanced Research Fellowship in 2006. At Leicester his research focuses on superfluid helium droplets, covering both Physical Chemistry and NanoChemistry. He was promoted to Professor in NanoChemistry in 2014, and received the NanoScience Award in 2015.

In this lecture, he will present their recent progress in the fabrication of novel nanoparticles and nanowires using superfluid helium droplets. A series of exploratory experiments will be reported, including the fabrication of single crystalline nanoparticles, core-shell nanowires and novel magnetic nanoparticles using superfluid helium droplets as the nano-reactors. In large helium droplets the first direct evidence for the presence of quantized vortices in nanoscale superfluid helium has been obtained, which are then developed as a generic means for the direct preparation of ultrathin nanowires. Finally, discovery of multiply quantized vortices in superfluid will be addressed.