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Amir Sa'ar obtained the PhD degree in Physics from Tel-Aviv University, Israel in 1988. In 1988 he received the Fulbright fellowship and joined the California Institute of Technology (Caltech) as a post-doc at the department of Applied Physics. In 1991 he joined the Hebrew University of Jerusalem, Israel as a faculty member and, since 1998 as a Professor of Applied Physics. His research interests include developing low-dimensional semiconductor nanostructures, particularly silicon based nanostructures such as porous silicon, silicon nanocrystals embedded in insulating matrices, silicon nanowires and nanorodes, and their utilization for electronics, photonics, sensing devices and recently also for photovoltaic applications. He has published more than 150 papers in scientific journals and conferences and has delivered many presentations and invited talks in international conferences and meetings. Prof. Sa’ar is among the founders of the Hebrew University Center for Nanoscience and Nanotechnology and the former academic director of the research infrastructure of the center.