Emeritus", and subsequently returned to academia to teach courses on physics. Academia and publications In 1957, Butt joined the faculty of physics at the Government College University, eventually becoming the lecturer in physics in 1958 and remained at his alma mater till 1961. He then taught physics at the University of Birmingham for several years and worked closely with British physicist, Dr. D. A. O'Conner, on the applications of diffraction, wave mechanics, and neutron scattering. Their work was sponsored and supported by the U.S. Department of Energy through the OSTI. Collaboration between Butt and O'Connor established the scientific confirmation of Ivar Waller's Theory of Phonons at the Bragg diffraction peaks using the Mössbauer spectroscopy from LiF's single crystals. Their work has been extensively cited for several decades and printed in several books including those of Cambridge University Press and North Holland Publishers in the United Kingdom. He remained associated with the CERN in Switzerland and the International Center for Theoretical Physics (ICTP) in Italy where his work on solid-state physics was widely recognized. In 1973, Butt joined the faculty of natural science at the Quaid-i-Azam University and briefly taught a course on solid-state physics and taught courses on material science while supervised one of his student's PhD thesis at the Quaid-i-Azam University. He also served on the examiner board for doctoral and master's thesis programs at the Punjab University and Bahauddin Zakariya University. He taught courses on physics at the Quaid-i-Azam University until 2000 when he joined the University of Oxford to teach physics. In 1973, Butt authored a college textbook, "Waves and Oscillation" that covers wide range of topics in wave mechanics, sound vibration, and theory of optics, which is extensively used by students in physics and mechanical engineering students in Pakistan. In 1996, he also authored a policy book, "CTBT & Its Implications". Public advocacy After his retirement from PAEC in 2000, Butt begin public advocacy for the benefits of the nanotechnology and engaged in providing education when he was appointed Chairman of National Commission on Nano-Science and Technology (NCNST) in 2003 and led till 2005. In addition, he also served as the chairman of Pakistan Science Foundation until 2010 where the PSF initiated several awareness programs on nanotechnology in Pakistan. After 1998, Butt effectively countered the anti-nuclear movement in the country to roll back the country's nuclear capability by noting in the public that the country would