Purushottam ChakrabortyPurushottam Chakraborty is a former senior professor at the Surface Physics and Materials Science Division, Saha Institute of Nuclear Physics, Kolkata, India. His research focusses on atomic collisions in solids, ion-beam modifications and ion-beam aalysis of materials, secondary ion mass spectrometry (SIMS), secondary neutral mass spectrometry (SNMS), NanoSIMS, low-dimensional materials and nanostructures, molecular beam epitaxy (MBE), X-UV optics, optoelectronics, nonlinear optics, photonics, and plasmonics. Read More Read Less