Department of Chemistry
Department of Chemistry
Academic Staff member

Prof. J. W. Hewage

Chair Professor

B.Sc. (Special in Chemistry)- University of Ruhuna, Sri Lanka.
Ph.D. -Department of Chemistry, University of Maine, USA.
Endeavor Postdoctoral Fellow-Research School of Chemistry, Australian National University.,
Email - jinasena@chem.ruh.ac.lk
Office -
Extention - 4403

LinnkedIn ResearchGate Google Scholar

  • CHE 4132 -Quantum Chemistry and Molecular Spectroscopy
  • CHE 4412 -Advanced Analytical Chemistry
  • CHE 4314 -Physical Methods in Inorganic Chemistry
  • CHE 4352 -Computational Chemistry
  • CHE 4223 -Advanced Thermodynamics, Statistical Thermodynamics, and Advanced Chemical Kinetics
  • CHE 4162 - Advanced Laboratory Physical Chemistry
  • CHE 1222 -Thermodynamics
  • CHE 2122 -Molecular Spectroscopy
  • CHE 2231 -Practical Physical Chemistry and Spectroscopy
  • Material Science-Theoretical Chemistry
  • Investigation of optical, magnetic, and electronic properties of mixed transition metal clusters (QM).
  • Investigation of structures, dynamics, and energetics of mixed transition metal clusters (MD).
  • Biosynthesis of nanomaterials and characterizations for potential medicinal and technological uses.
  • Journal Articles
    1. 16. Sathya M. Perera, Samanthika R. Hettiarachchi, Jinasena W. Hewage,Molecular Adsorption of H2 on Small Neutral Silver-Copper Bimetallic Nanoparticles: A Search for Novel Hydrogen, ACS Omega (2022). Download
    2. 15. Kalana D. Halanayake, Nishantha K. Kalutharage, Jinasena W. Hewage, Microencapsulation of biosynthesized zinc oxide nanoparticles (ZnO-NPs) using Plumeria leaf extract and kinetic studies in the release of ZnO-NPs from microcapsules, SN Appl. Sci. 3, 17 (2021). Download
    3. 14. Jinasena W. Hewage,Dynamics and thermodynamics of core/shell formation of icosahedral NimAgn bimetallic nanostructures, Journal of Material Science (2020). Download
    4. 13. Duwage C. Perera; Jinasena W. Hewage; Jayendran C. Rasaiah, Acetic acid and propionic acid decarboxylation on Mg(OH)2 nanoclusters: a density functional theory study, Journal of Material Science (2020). Download
    5. 12. Achinini A Wijeweera, Jinasena W Hewage, Godakanda G Jayasinghe, Shriya Hemalika Waduthanthrige, Samanthika R Hettiarachchi, Kitulgala G. G Wijesinghe, Maturity dependence of quality, quantity and chemical constituents of bark and leaf oil of Ceylon Cinnamon (Cinnamomum zeylanicum Blume), Ruhuna. J. Sci., 11, pp 1-12 (2020) Download
    6. 11. Jinasena W. Hewage, Core/Shell formation and surface segregation of multi shell icosahedral silver-palladium bimetallic nanostructures: A dynamic and thermodynamic study, Mater. Chem. Phys. 174, pp 187-194 (2016) Download
    7. 10. Jinasena W. Hewage, German Cavigliasso, Robert Stranger, Metal-Metal Bonding in Trinuclear, Mixed-Valence [Ti3X12]4- (X = F, Cl, Br, I) Face-Shared Complexes, Inorg. Chem. 54 (22), pp 10632-41 (2015). Download
    8. 09. Duwage C. Perera, Jinasena W Hewage, Nalin de Silva, Theoretical study of catalytic decomposition of acetic acid on MgO nanosurface, Comput. Theor. Chem. 1064, pp 1-6(2015) Download
    9. 08. Jinasena W. Hewage, The study of dynamics and phase transitions of small Ag/Pd motifs using molecular dynamics and histogram methods, Comput. Theor. Chem. 1059, pp 60-67(2015). Download
    10. 07. Jinasena W. Hewage, Structure, energetic and phase transition of multi shell icosahedral bimetallic nanostructures: A molecular dynamics study of NimPdn (n + m =55 and 147), Mater. Chem. Phys., 149-150, pp 663-669 (2015). Download
    11. 06. J. W. Hewage, Energetic and Phase Transitions of Small Heterogeneous Ni-Pd clusters, Eur. Phys. J. D68 (06), pp 143-154 (2014).Download
    12. 05. J. W. Hewage, Towards the Understanding of the Photochemical Ring Opening and Closing Mechanisms for Spiropyrans Using 2H-Pyran and the Maximum Overlap Method, Eur. Phys. J. D67 (11), pp 181-185 (2013). Download
    13. 04. J. W. Hewage, W. L. Rupika, and F. G. Amar, Structure, dynamic and energetic of mixed transition metal clusters: A computational study of mixed clusters of silver and nickel , Eur. Phys. J. D66 (11), pp 282-287 (2012). Download
    14. 03. J. W. Hewage, F. G. Amar, and W. L. Rupika, Investigation of structure, dynamics and energetic of mixed transition metal clusters; AgnNi (13-n) for n? 13, Ruh. J. Sci. 2, pp 30-40 (2007). Download
    15. 02. J. W. Hewage, and F. G. Amar, Structural motifs and stability of small argon� nitrogen clusters, J. Chem. Phys. 119, pp 9021-9029 (2003). Download
    16. 01. J. W. Hewage, F.G Amar, M.F Feraudy, and G Torchet, The structure of mixed nitrogen-argon clusters, Eur. Phys. J. D24, pp 249-252 (2003). Download
    Conference Papers
      R.J.K.A. Thamali, A.A. K. Kumbalatara, D.D. Liyanage, A.Ukwatta, J. W. Hewage and S. Witharana Modeling and understanding of highly energy-efficient fluids Annual Sessions of IESL, pp. [239 - 245], The Institution of Engineers, Sri Lanka (IESL), October 19-21, 2015, Colombo.
  • Books and Chapters
      P. A. Paranagama, K. R. Dayananda, and Jinasena. W. Hewage, Chemistry and Bioactive Compounds of Cinnamomum zeylanicum Blume, Springer, pp 251-271 (2020). Download
  • Abstracts and Oral Presentations
    1. Biosynthesis of ZnO nanoparticles leaf extract of Plumeria and characterization, Halanayaka K. D, Kalutharage N. K, Hewage J. W, Proceedings of 7th Ruhuna International Science & Technology Conference, University of Ruhuna, Matara, Sri Lanka.January 22, 2020, Page 19.
    2. Maturity Dependence of Quality, Quantity and Chemical Constituents of Bark and Leaf Oil of two varieties of Ceylon Cinnamon (CinnamomumzeylanicumBlume), Wijeweera, A. A, Hewage, J. W, Jayasinghe, G. G ,Hemalika,W. S, Hettiarachchi, S. R and Wijesinghe, K. G. G, Proceedings of 7thRuhuna International Science & Technology Conference, University of Ruhuna, Matara, Sri Lanka. January 22, 2020, Page 17.
    3. Maturity and variety dependence of bioactive constituents of ceylon cinnamon (CinnamomumzeylanicumBlume), Madhushuka, K. T, Wijeweera, A. A, Hemalika, W. S, Hettiarachchi, S.R., Hewage, J. W, Jayasinghe, G. G and Wijesinghe, K. G. G Proceedings of 7thRuhuna International Science & Technology Conference, University of Ruhuna, Matara, Sri Lanka.January 22, 2020, Page 100
    4. Micro-Encapsulation of biosynthesized of ZnO-NP and kinetic studies of release of ZnO for potential medicinal uses, K. D. Halanayake, N. K. Kalutharage, J. W. Hewage, proceeding of the conference “Frontiers in chemical technology 2020”, July 20-22, 2020, Colombo, Sri Lanka.
    5. Theoretical study and design of a catalytic reaction using density functional theory: Acetic acid decarboxylation in the gas phase and on Mg(OH)2 nanosurfaces, Duwage C Perera, Jinasena W Hewage, Jayendran C Rasaiah,University of Maine Student Symposium, Bangor, ME on 10th April 2019
    6. Theoretical study of the thermal decomposition of acetic acid on Mg(OH)2 nanosurface using DFT, Duwage C Perera, Jinasena W Hewage, Jayendran C Rasaiah, Abstracts of the Papers American Chemical Society, 256th ACS National Meeting and Exposition, August 19-23, 2018, Boston, MA.
    7. Molecular Adsorption of H2 on Small Silver-Copper Bimetallic Nanoparticles: A Search for Novel Hydrogen Storage Material, G.C.M. Perera, P. T. Kodippily, J. W. Hewage, K. M. Nalin de Silva. 3rd International Conference on Nanoscience and Nanotechnology, December 15-16, 2016, Colombo, Sri Lanka
    8. Ab initio studies of magnesium hydroxide nanoparticles as potential catalysts for thermal decomposition of acetic acid, D. C. Perera, J. W. Hewage and J. C. Rasiah, American Chemical Society 41st Northeast Regional, October 05-08, 2016, Binghamton, NY, USA
    9. Broken Symmetry Approach on Metal-Metal Interactions in Trinuclear Mixed Valance Titanium Complexes, J. W. Hewage and R. Stranger, The International Conference on Chemical Education, April 03-04 2014, Institute of Chemistry Ceylon, Colombo
    10. Theoretical Study of Adsorption and Decomposition of Acetic Acid on MgO Nano- Surfaces , J. W. Hewage and K. M. Nalin de Silva, The International Conference on Chemical Education, April 03-04 2014, Institute of Chemistry Ceylon, Colombo.
    11. Density Functional Studies of [Ag (CN)2]- Doped in Alkali Halide Crystals , R. D. Rajapaksha, B.R.L. Thilakarathna and J. W. Hewage, 10 th Academic Sessions, March 20, 2013, Faculty of Medicine, University of Ruhuna, Galle
    12. Computer Simulation Study of Structure and Stability of CO2-N2 Dimers, W. L Rupika, J. W. Hewage, SLAAS Proceedings of the 64th Annual, Session, 2008
    13. Landau free energy calculations of heterogeneous clusters using molecular dynamics, W. Meeting H. Jinasena, Second Annual Greater Boston Area Statistical Mechanics Meeting Saturday, October 14, 2000, Brandeis University, USA
    14. Molecular Dynamics Simulation of the Structure, Dynamics and Electron Diffraction Patterns of ( N2)nArm Clusters", W. H. Jinasena and F. G. Amar, American Chemical Society 30th Northeast Regional, June 24-27, 2001, University of New Hampshire, Durham, NH, USA
    15. Structure and Thermodynamics of Arm(N2)n Clusters, Francois G. Amar and Jinasena W. Hewage. Third CERMM Symposium, Concordia University, Montreal, CA, January 11, 2003.
    16. Simulation of Structure, Stability and Electron Diffraction Patterns of Mixed Nitrogen-Argon Clusters, J. W. Hewage, and F. G. Amar, University of Maine, 224th American Chemical Society National Meeting, August 18-2, 2002, Boston, MA
      17. A Search for Novel Hypoglycaemic Compounds from Plants, NKVM. Ruvin Kumara, J. W. Hewage, R. N. Pathirana, C. Pathirana, Galle Medical Association, Annual Sessions 1994
  • NRC (National Research Council) Merit Award for Scientific Publication-2016 in 2018
  • Presidential Award for Scientific Publication-2015 in 2017
  • NRC Merit Award for Scientific Publication-2014 in 2016
  • NRC Merit Award for Scientific Publication-2013 in 2015
  • Visiting Academic Position awarded by Research School of Chemistry, Australian National University, September 2012-February 2013
  • Endeavour Research Fellowship 2011 awarded by the Australian Government
  • NRC Merit Award for Scientific Publication-2012 in 2014
  • NSF 10 million Research Grant 2016 (SP/CIN/2016/04)
  • University of Ruhuna Research Grant 2015/2016(RU/SF/RP//2015/06
  • NRC Research Grant 2008-01
  • NSF Research Grant 2008 (RG/2008/BS/3)
  • University of Ruhuna Research Grant 2006/2007 (RU/SF/RP/2006/04 )
  • University of Ruhuna Research Grant 2004/2005 (RU/SF/RP/2004/01)
  • The best Teaching Assistant in general Chemistry in 2002, Department of Chemistry, University of Maine, USA
    1. Was the Chairperson of the 5th Ruhuna International Science and Technology Conference, RISTCON 2018, held on February 15, 2018.
    2. Worked as a visiting research fellow on a summer research project from May 31 to August 20, 2015, Department of Chemistry, University of Maine. USA.
    3. Participated as a resource person for the workshop on �G.C.E. (A/L) Teacher training Workshop in Chemistry� held on 11th and 12th of November 2006 at the Department of Chemistry University of Ruhuna. �Importance of fundamental concepts included in the G.C.E (A/L) Physical Chemistry syllabus�
    4. Worked as a resource person coordinating Practical Session in Physical Chemistry in the workshop on �G.C.E(A/L) Teacher training Workshop in Chemistry� held on 11th and 12th of November 2006 at the Department of Chemistry, University of Ruhuna.
    5. Participated in the conference on �Molecular Aspects of Cell Biology: A Perspective from Computational Physics�� from October 11-15, 2010 at ICTP in Italy
    6. Carried out a summer research project on �Investigation of magnetic properties on small metal clusters�, from May 31st to July 31st, 2006, Department of Chemistry, University of Maine. USA.
    7. Participated in the workshop on �Integrating Science and Mathematics Education into Teaching�, University of Maine, USA.
    8. Executive committee member of 4th Science Symposium-2006, Faculty of Science, the University of Ruhuna
    9. Participated in the international conference on �New Directions in Teaching, Learning and Education of Chemical Sciences at the Tertiary Level�, held on 11th and 12th March 2006, Taj Samudra Hotel, Colombo.
    10. Participated in the subject Reviewer Training Workshop held on 27th January 2006, BMICH, Sri Lanka.
    11. Participated in the workshop on �Course Planning Workshop of the Distance Education Partnership Program� from 02nd to 4th September 2005, Blue Water Hotel, Wadduwa, Sri Lanka.
    12. Participated in the High-Performance Computing Workshop on �Scientific Computing and Visualization�, December 2-3, 1999, Boston University, MA, USA.