Haimei Zheng is a senior staff scientist in Materials Sciences Division at Lawrence Berkeley National Laboratory (LBNL) and she is also an adjunct professor in the Department of Materials Science and Engineering at University of California, Berkeley. She received her Ph.D degree in materials science and engineering from University of Maryland, College Park and was a postdoctoral fellow at University of California, Berkeley and LBNL. Her current research focuses on understanding how atomic level heterogeneity and fluctuations control physical and chemical processes of materials. With in-situ liquid phase electron microscopy, her group studies nucleation, growth and transformations of materials, solid-liquid (including electrode-electrolyte) interfaces. Dr. Zheng received DOE Office of Science early career award in 2011, LBNL Director’s award for exceptional scientific achievement in 2013 and MRS Medal award in 2019.