

| November 2019 | Gunma University Initiative for Advanced Research (GIAR). Works on 2D materials including graphene and black phosphorus. Professor |
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| January 2015 | Gunma University, Kiryu City, Gunma, Japan. Teach ‘Green and Surface Chemistry’ Associate professor |
| March 2011 | Gunma University, Kiryu City, Gunma, Japan Tenure-track Assistant Professor |
| July 2009 | Northwestern University, Evanston, USA, with Prof. Mark C. Hersam. Research scholar |
| April 2004 | RIKEN, Wako, Japan, with Prof. Maki Kawai Contract researcher (postdoc), |
| February 2002 | ISSP, The University of Tokyo, Japan, with Prof. Jun Yoshinobu. JSPS postdoctoral fellow, |
| February 1995 | Shahjalal University of Science and Technology, Sylhet, Bangladesh. In charge of Introductory Physical Chemistry and Molecular Spectroscopy. Lecturer |
Papers