• Worked as a Visiting Professor / Visiting Scientist at –

University of Maryland, College Park, University of Southern California, Los Angeles, U.S.A., Bellcore, Red New Jersey, U.S.A., FOM Institute Amsterdam, Institute for Nuclear Physics ( IN2P3), Lyon, University of Rouen, France.

• Visited Japan, Germany, Belgium, Italy, USSR, France, UK on scientific assignments and for conferences.
• Past Member Editorial Board of Bulletin of Materials Science, Currently Editorial board member for “Silicon”.
• Reviewer for Nature, Nature Materials, Advanced Materials, Phys. Rev. Letts., JACS, Appl. Phys. Lett., Phys. Rev. B, Langmuir and many other journals.