Dr. Mahinda Ranasinghe

Mahinda Ranasinghe, PhD

Assistant Professor

Chemistry


RESEARCH GROUP HOMEPAGE

Education

Senior Research Associate - University of Calgary, Alberta Canada, 2012 - 2014

Lecturer -University of Peradeniya, Sri Lanka, 2006 - 2008

Postdoctoral Researcher - Arizona State University, 2005 - 2006

Postdoctoral Researcher - Carnegie Mellon University, 2004 - 2005

PhD, Wayne State University, 2004

BS, University of Peradeniya, Sri Lanka

Keywords

Photochemistry, Ultra-fast Laser Spectroscopy, Solar Energy and Sustainability, Inorganic Heterostructures

Research Interests

The research interests of Dr. Ranasinghe's group is centered on physical chemistry and spectroscopy.  Yet our research is predominantly multidisciplinary. Research in the group is mainly focused on the developments of novel nano-photonic materials for solar energy related applications such as solar energy conversion, photocatalysis and photovoltaics.

The group utilizes ultra-fast, femto-second pulsed laser system to carry out time-resolved fluorescence spectroscopy of these novel materials. These studies provide an in-depth understanding about the photophysical processes taking place in these nanomaterials and their relations to the structure and chemical composition of these nanomaterials. The investigations are further supported by theoretical computational calculations. The group maintains a strong research collaborations with several other research groups in NMT and other US institutions.

In the research group, nano-crystals, semiconductor nanoparticles, quantum dots are being synthesized and studied using various spectroscopic instrumentation. These material are used in photovoltaic, photocatalysis and biological imaging. This research project has an active collaboration with Prof. Fuierer of Materials and Metallurgical Engineering at NMT. Also, Dr. Erik Bandala of Desert Research Institute in Las Vegas NV. 

Recent Publications

Rajapaksha Ruwini D.; Fuierer Paul A.; Ranasinghe, Mahinda I. Colloidal CuZnInS3 nanocrystals as the sensitizer in photovoltaic solar cells. Solar Energy, 2019, 189, 503-509.

Rajapaksha Ruwini D.; Turner Danielle; Vigil Jade; Frolova Liliya V.; Altig Jeffrey A.; Rogelj Snezna; Ranasinghe, Mahinda I. Photo-physical properties of substituted 2,3-distyryl indoles; A spectroscopic, computational and biological insights, Journal of Photochemistry & Photobiology A: Chemistry, 2019, 376, 73-79.

Rajapaksha, Ruwini D.; Benet, Matthias; Champion, Cody; Frolova, Liliya V.; Rogelj, Snezna; Choudhury, Pabitra; Ranasinghe, Mahinda I. Spectroscopic study of  photoactive antibacterial agent: 2,3-Distyrylindoles. Journal of Physical Chemistry A, 2018, 122, 937-945.

Edwards, Les; Turner, Danielle; Champion, Cody; Khandelwal, Megha; Zingler, Kailee; Stone, Cassidy; Rajapaksha, Ruwini D.; Yang, Jing; Ranasinghe, Mahinda I.; Kornienko, Alexander; Frolova, Liliya; Rogelj, S. Photoactivated 2,3-Distyrylindole kill multi-drug resistant bacteria. Bioorganic and Medicinal Chemistry Letters, 28, 2018, 1879-1886.

Rajapaksha, Ruwini D.; Ranasinghe, Mahinda I. The shell thickness and surface passivation dependence of fluorescence decay kinetics in CdSe/ZnS core-shell and CdSe core colloidal quantum dots. Journal of Luminescence, 2017, 192C, 860-866.