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In Situ X-Ray and Optical Techniques for Functional Nanomaterials

Speaker

Gang Chen ,Shanghai Tech University

Time

2019.04.23 13:00-14:00

Venue

Room 306, No.5 Science Building

Abstract

Today, nanotechnology has a broad impact on social, economic and scientific sectors. In view of their typical length scale, nanomaterials could not be easily measured by an optical microscope, but mainly through electron and atomic force microscopes. They usually require special sample treatments and test conditions, which makes an in situ measurement difficult. Synchrotron x-rays, due to their specific wavelengths, large flux, high penetration and tunable photon energy, play an important role in nanomaterial characterizations. In this talk, I will discuss our recent progresses of in situ X-ray and optical studies of plasmonic nanostructures, perovskite films and colloidal nanoparticles. The growth mechanism of gold plasmonic nanostructures and the dynamic formation and conversion processes of metal halide perovskite films are revealed through the in situ investigations. The unexpected discovery of the immersion depth variation with interparticle distances leads up to unveil the haunting mystery of the attractive interaction between like-charged interfacial particles.

Bio

Chen gang received his bachelor’s degree in physics from University of Science and Technology of China in 2000.He received his PhD in physics from Purdue University in 2007.From 2007 to 2011, he worked as a postdoctoral researcher in the department of physics, University of California, San Diego.From 2011 to 2012, he was employed in the materials physics department of Lawrence Berkeley national laboratory.In October 2012, he joined the Shanghai institute of applied physics of the Chinese academy of sciences with overseas outstanding talents under the “one hundred talents plan” of the Chinese academy of sciences. In 2013, he was selected into the “one thousand talents plan” of the organization department of the Chinese academy of sciences.In January 2015, he joined the school of material science and technology, ShanghaiTech University as a researcher.Commun, Phys. Rev. Lett., Appl. Phys. Lett., Nano Lett., Adv. Mater., Angew.Presided over key projects of the national fund committee, general projects and key projects of basic research in Shanghai.