Philip Moriarty (born 1968 in London) is an Irish physicist and professor of physics at the University of Nottingham. He is known for his work on nanostructures and his collaboration with Brady Haran on the YouTube video series Sixty Symbols. From 1990 to 1994, Moriarty attended the School of Physical Sciences of Dublin City University, where he received his doctorate in 1994 in physics. Until 1997, he was a postdoctoral researcher in the field of physics at the University of Nottingham. He became a lecturer in the Department of Physics until 2003. Since 2005 he has been Professor of Physics at the School of Physics and Astronomy, University of Nottingham.