1.   Iowa State University, USA, 2004. 

      (18th Biennial Conference on Chemical Education)

 

2.   National University of Singapore 2007. 

(Visit to chemistry department under the auspices of Singapore International Chemistry Conference, SICC)

 

3.   National University of Singapore 2011.

 

4.   University of Nottingham, Malaysia Campus Nov-2012. 

      (Invited as external examiner for Ph.D Thesis)

 

5.   University of South Dakota, USA, June-July 2014.

 

6.   Japan Advanced Institute of Science and Technology, Japan, May-2016.

 

7.   National Sun Yat Sen University, Kaohsiung, Taiwan, July-2018.