EPSRC-SUPERGEN  post-doctoral fellowship, Apr 2008 to Dec 2010, with Prof. Keith Scott,

School of Chemical Engineering and Advanced Materials, Newcastle University, UK.

NSC-TAIWAN post-doctoral fellowship, Dec 2005 to Mar 2008, with Prof. Bing Joe Hwang,

National Taiwan University of Science and Technology, Taipei, Taiwan R.O.C.

ICMR-Senior Research Fellow (2003-2005), University of Madras, Chennai.