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• Ph.D. (Fast Heavy Ion-Solid Interactions: Mechanistic studies & Mass spectrometry applications)-1996
  (University of Colombo)
  
• B.Sc. (Physics Special) Hons- 1982
  (University of Colombo)

Mass spectrometry applications of fast heavy ion/photon induced desorption:
(i) Development of plasma desorption mass spectrometry (PDMS) and Matrix Assisted Laser Desorption/Ionisation (MALDI) mass spectrometry facilities at the Department of Physics of the University of Colombo.
(ii) The application of PDMS to natural product compounds isolated from medicinal plants & Organic metal complexes.

1. Vice President – Institute of Physics Sri Lanka (IPSL) (2006/2007 and 2007/2008)
2. Co-editor - Institute of Physics Sri Lanka (IPSL) for the Sri Lankan Journal of Physics ( 2000- 2005)
3. Committee member - Sri Lanka Association for the Advancement of Sciences (SLAAS) ( 2007)
   

1. Performance of the first plasma desorption mass spectrometer in Sri Lanka, T.R.Ariyaratne, D.D.N.B. Daya, S. Widdiyasekera, P. Hakansson and B.U.R. Sundqvist, TSL-ISV 7, Dept. of Radiation Science Report, Uppsala University, 1987.
2. Application of Californium- 252 plasma desorption mass spectrometry to natural product chemistry, T.R.Ariyaratne, D.D.N.B.Daya, G.M.U.W. Doloswala, J.A.D.C. Kumudini and E.C.S. Widdiyasekera, Proc. Sri Lanka Assoc. Advmt. Sci. E1-17 (1990) 140
3. Sample Temperature Dependence of Plasma Desorption Mass Spectra of Biomolecules, D.D.N.Barlo Daya, P. Demirev,P.Hakansson, J. Kjellberg and B.U.R. Sundqvist, Anal. Chem. 64 (1992)2977
4. On molecular ion formation by hydride abstraction in plasma desorption mass spectrometry, P.Demirev, D.D.N.Barlo Daya, G.Brinkmalm, D.Fenyo, P.Hakansson and B.U.R.Sundqvist, Int. J. Mass Spectrom. and Ion Proc. 123 (1993) 69-75
5. Resolution vs ion yield study on the first 252Cf - Plasma Desorption Mass Spectrometer in Sri Lanka, D.D.N.B. Daya, U.K. Abeywarna, T.R. Ariyaratne and C.K.G. Piyadasa, Proc. 49th Annual Sessions of Sri Lanka Assoc. Advmt. Sci. E1-17 (1993) 196 252Cf -
6. Plasma Desorption Mass Spectra of Penicillins and the stabilization of molecular ions by Cationization, R.V. Coorey, U.K. Abeywarna, T.R. Ariyaratne, D.D.N.B. Daya and C.K.G. Piyadasa, 49th Annual Session, Sri Lanka Assoc. Advmt. Sci., E1-18 (1993) 197
7. Alkali Halide Cluster ion desorption in MeV atomic ion impacts, T.R.Ariyaratne, D.D.N.Barlo Daya, G.Brinkmalm, P.A.Demirev, J.Eriksson, P.Hakansson, R.Papaleo, B.U.R.Sundqvist, Book of Abstracts, 13th International Mass Spectrometry Conference, Budapest E (1994)155
8. Scanning force microscopy study of surface tracks induced in mica by 78.2-MeV 127I ions, D.D.N. Barlo Daya , A. Hallén, P. Håkansson, B.U.R. Sundqvist and C.T. Reimann, Nucl. Instr. Meth. in Phys. Res. B103 (1995) 454-465
9. Scanning force microscopy studies of surface tracks induced in mica and L-valine by swift , heavy atomic and C60 ions, D.D.N.B. Daya, J. Kopniczky, A. Hallén, C.T.Reimann, B.U.R. Sundqvist, P. Håkansson, A. Brunelle, S. Della-Negra and Y. Lebeyec, Book of Abstracts, Third Int. Symposium. on Swift Heavy Ions in Matter, Caen, May 15-19, 1995
10. Performance of the newly constructed linear time-of-flight plasma desorption mass spectrometer, C.K.G. Piyadasa, U.K. Abeywarna, T.R. Ariyaratna, R.V. Coorey, D.D.N.B. Daya and W.M.K.P. Wijayaratna, Proc. 51st Annual Sessions of Sri Lanka Assoc. Advmt. Sci. E1-06 (1995) 341
11. Performance of an electrostatic lens (Einzel lens) as an ion manoeuvring device in a time-of-flight mas spectrometer, C.K.G. Piyadasa, U.K. Abeywarna, T.R. Ariyaratna, R.V. Coorey, D.D.N.B. Daya and W.M.K.P. Wijayaratna, Proc. 51st Annual Sessions of Sri Lanka Assoc. Advmt. Sci. E1-07 (1995) 343
12. Fast Heavy Ion Induced Photon Emission from Organic Solids and Plasma Desorption Mass Spectrometry, T.R.Ariyaratne, D.D.N.B.Daya, P.Håkansson and B.U.R.Sundqvist, Int. J. Mass Spectrom. Ion Processes (accepted)
13. Radiation damage features on mica and L- valine probed by scanning force microscopy, D.D.N. Barlo Daya, A. Hallén, J. Eriksson, J. Kopniczky, R. Papaléo, C.T. Reimann, P. Håkansson, B.U.R. Sundqvist, A. Brunelle, S. Della-Negra and Y. Le Beyec, Nucl. Instr. Meth. in Phys. Res. B 106 (1995) 38.
14. Latent (sub-surface) tracks in mica studied by tapping mode scanning force microscopy, D.D.N.Barlo Daya, C.T. Reimann, A. Hallén, B.U.R. Sundqvist and P. Håkansson, Nucl. Instr. Meth. in Phys. Res. B 111(1996) 87-90.
15. Fast Heavy Ion Induced Desorption of Biomolecules: Applications and Mechanistic Studies, D.D.N.B. Daya, Ph.D. Thesis, University of Colombo, Sri Lanka, August 1996.
16. Ion Induced Photon Emission from Solid Surfaces,T.R.Ariyaratne, D.D.N.B.Daya, P.Håkansson and B.U.R.Sundqvist, Book of Abstract of the 11th Int. Workshop on Inelastic Ion Surface Collisions, Wangerooge, Germany, Sep. 22-27, 1996, pg.3
17. Performance of a New Two-Way Ion Production Facility Constructed for a Plasma Desorption Mass Spectrometer, D.D.N.B. Daya, U.K. Abeywarne, T.R. Ariyaratne, R.V. Coorey, C.K.G. Piyadasa and W.M.K.P. Wijayaratna , Book of Abstract, 52nd Annual Sessions of Sri Lanka Association for the Advancement of Science, E1-518 (1996) 171
18. A scanning Force Microscopy Study of Surface and Sub-Surface Tracks on Mica due to Fast 127I Atomic and C60 Cluster Ions, D.D.N.B. Daya, C.T. Reimann, A. Hallén, Å, Petersson, A.P. Quist, P. Håkansson, B.U.R. Sundqvist, A. Brunelle, S. Della-Negra and Y. Lebeyec, Book of abstracts, Int. Conf. on Nuclear Tracks in Solids, Cairo, Egypt , Sep. 1 - 5, 1996
19. Scanning Force Microscopy Studies of Radiation Damage Tracks on Mica due to Mega-Electronvolt Atomic Ions and C60 Cluster Ions,D.D.N.B. Daya, C.T. Reimann, A. Hallen, A. Petersson, A.P. Quuist, P. Hakannson, B.U.R. Sundqvist, A. Brunelle, S. Della-Negra and Y. Le Beyec, Book of Abstract of the 11th Int. Workshop on Inelastic Ion Surface Collisions, Wangerooge, Germany, Sep. 22-27, 1996, pg.16
20. Fast Heavy Ion Induced Photon Emission from Solid Surfaces and its Application in Plasma Deosorption Mass Spectrometry. T.R. Ariyaratne, D.D.N.B. Daya, P. Hakansson and B.U.R. Sundqvist, Book of Abstracts of the "Deosorption '96", Bornholm, Denmark, Sept. 18 - 21, 1996, pg 41
21. Crater formation due to grazing incidence C60 cluster ion impacts on mica: a Tapping mode scanning force microscopy study, D.D.N. Barlo Daya, C.T. Reimann, P. Håkansson, B.U.R. Sundqvist, A. Brunelle, S. Della-Negra and Y. Le Beyec, Nucl Nucl. Instr. Meth. in Phys. Res. B 124 (1997) 484
22. Site-selective molecular adsorption at nanometer-scale MeV-atomic-ion-induced surface defects, A.P. Quist, A. Petersson, C.T. Reimann, A.A. Bergman, D.D.N.B. Daya, A. Hallen, J. Carlsson, S.O. Oscarsson and B.U .R. Sundqvist, Journal of Colloid and Interface Science 189 (1997) in press.
23. Interaction of MeV atomic ions with molecular solids: Ion track structure and sputtering phenomena, D.D.N.B. Daya, P. Demirev, J. Eriksson, A. Hallen, P. Hakansson, R.E. Johnson, J. Kopniczky, R.M. Papaleo, C.T. Reimann, J. Rottleer and B.U.R. Sundqvist, Radiation Measurements, 28,1-6 (1997) 101
24. Construction of a keV pulsed ion source and the measurement of damage cross-sections for keV ion induced sputtering from solid tragets, D.D.N. Barlo Daya, T.R. Ariyaratne, P. Hakansson and B.U.R. Sundqvist and W. Ens, Ceylon J. Science, Physical Sc. 4(1) (1997) 23-32
25. Applicatiion of plasma desorption mass spectrometry (PDMS) in the study of schiff base-metal complexes, D.D.N. Barlo Daya, A.M.S.M. Nugegoda, T.R. Ariyaratne, W. I. N. de Silva and S. Hewage, 54nd Annual Sessions of Sri Lanka Association for the Advancement of Science, 1998
26. Construction of a matrix assisted laser desorption/ioinisation time-of-flight mas spectrometer, R.V. Coorey, T.R. Ariyaratne, D.D.N.Barlo Daya and W.M.K.P. Wijayartana, Sri Lanka Journal of Physics-Vol 1 (2000-March)33
27. Scintillating properties of amino acids excited by 252Cf fission fragments,A.M.S.M. Nugegoda, T.R. Ariyaratne and D.D.N. Barlo Daya, Proceedings (Abstracts), Desorption-2000, St. Malo, France (2000)P37
28. Plasma dsorption mass spectrometry (PDMS) of crude extracts of selected medicinal plants, S.A. Dahanayaka, D.D.N. Barlo Daya, G.A.S. Premakumara and T.R. Ariyaratne, Proceedings of the 56th Annual Session of SLAAS (Part 1-Abstracts) E2(2000)238
29. Plasma desorption mass spectrometry (PDMS) of plant extracts and its potential applications in quantitative estimations S.A. Dahanayaka, D. D.N.Barlo Daya, M.S.B. Mohottalage, G.A.S. Premakumara and T.R. Ariyaratna, Abstracts, Annual Session, Faculty of Science, University of Colombo, Vol.1(2000010
30. Plasma desorption mass spectrometry(PDMS) of crude extracts of selected medicinal plants,S.A. Dahanayaka, D.D.N. Barlo Daya, G.A.S. Premakumara and T.R. Ariyaratne, Proceedings of the 56th Anbnual Session of SLAAS (Part 1-Abstracts) E2(2000)238
31. Scintillating properties of amino acids excited by 252Cf fission Fragments, Proceedings (Abstracts),A.M.S.M. Nugegoda, .T.R. Ariyaratne and D.D.N. Barlo Daya, Desorption -2000, St.Malo, France (2000)-P37
32. Quick detectioin of active compounds in crude extracts of selected plants using plasma desorptiion mass spectrometry (PDMS),S.A. Dahanayake, D.D.N. Barlo Daya, M.S.B. Mohottalage, G.A.S. Premakumara and T.R. Ariyaratne, Proceedings (Abstracts), Desorption -2000, St.Malo, France (2000)-P46
33. Construction of a matrix assisted laser desorption/ionisation mass spectrometer R.V. Coorey, T.R. Ariyaratne, D.D.N.Barlo Daya and W.M.K.P. Wijayaratna, Sri Lankan Journal of Physics-Vol 1 ( 2000-March) 3
34. Scintillating properties of the amino acids of tryptophan. A M S M Nugegoda, T R Ariyaratne and D D N B Daya. SLAAS, Proc. 58th Annual Session, Sri Lanka, 2002
35. Ion and UV photon induced fluorescence from di-peptides. A M S M Nugegoda, T R Ariyaratne and D D N B Daya. SLAAS, Proc. 58th Annual Session, Sri Lanka, 2002
36. Improved performance of a linear mode plasma desorption time-of-flight mass spectrometer with an electrostatic wire guide. S A Dahanayake, D D N B Daya, T R Ariyaratne and M S B Mohottalage. IPSL, Proc. 18th Technical Session, Sri Lanka, 2002
37. Future role of young scientists in the Science and Technology development in Sri Lanka, K.K.A.S. Yapa, W.A.P. Weerakkody, N.V. Horadagoda, R.W.M. Amaradasa, D.D.N.B. Daya, J. Gooneratne, S. Wickramaratne, and P. Silva, NASTEC Young Scientists Forum, 57th SLASS Annual Session, 2001
38. Use of Matrix-assisted Laser desorption /Ionization (MALDI) mass spectroscopy in the structural confirmation of metal complexes.
    L. K. H. K Alwis, R. V. Coorey, D. D. N. B. Daya, T. R. Ariyaratne, B. G. K. Perera, K. S. A. Thilakarathna, R. M. De Silva, and S. Hewage. 10th International Conference – Desorption 2004, St. Petersburg, Russia, August 29 – September 2 page 130.
39. Design and construction of a low cost linear matrix-assisted laser desorption / ionization time-of-flight mass spectrometer with pneumatic controls,
    L. K. H. K. Alwis, T. R. Ariyaratne, D. D. N. B. daya, and R. V. coorey, book of Abstracts, page 21, Joint Academic Sessions, Faculties of Science and Medicine, University of Colombo, Sri Lanka, June 2004, 21.
40. Design and construction of a low cost control system to automate a MALDI-TOF mass spectrometer,
    T. W. A. S. Goonatilleke, L. K. H. K. Alwis, R. V. Coorey, T. R. Ariyaratne, and D. D. N. B. Daya, book of Abstracts, page 22, Joint Academic Sessions, Faculties of Science and Medicine, University of Colombo, Sri Lanka, June 2004, 22.
41. Application of matrix-assisted laser desorption / ionization (MALDI) mass spectrometry to metal complexes,
    L. K. H. K Alwis, R. V. Coorey, D. D. N. B. Daya, T. R. Ariyaratne, B. G. K. Perera, K. S. A. Thilakarathna, R. M. De Silva, and S. Hewage, book of Abstracts, page 24, Joint Academic Sessions, Faculties of Science and Medicine, University of Colombo, Sri Lanka, June 2004, 24.
42. Design and construction of an electrostatic ion reflector for a matrix-assisted laser desorption / ionization time-of-flight (MALDI-TOF) mass spectrometer,
    L.K.H.K.Alwis, T. R. Ariyaratne, D. D. N. B. Daya, and R. V. Coorey, 60th Annual sessions of SLAAS,2004.
43. Matrix Assisted Laser Desorption / Ionization time of flight (MALDI-TOF) mass spectrometric identification of human erythrocyte membrane associated proteins separated by one dimensional gel electrophoresis,
    D. U. Kottahachchi, S. C. A. Abeykoon, G. A. U. Jayasekara, T. R. Ariyaratne, and D. D. N. B. Daya, 61st Annual sessions of SLASS, 613E-2 , 74,2005.
44. Investigation of the changes and identification of erythrocyte membrane associated proteins in healthy individuals and chronic myeloid leukemia (CML) patients using one dimensional sodium dodecyl sulphate poly acrylamide gel electrophoresis (1D SDS-PAGE) & Matrix Assisted laser Desoption Ionization Time of Flight (MALDI-TOF) Mass Spectrometry, D.U. Kottahachchi, S. C. A. Abeykoon, G. A. U. Jayasekara, T. R. Ariyaratne and D, D. N. B. Daya, 6th Annual Academic Sessions, The Sri Lanka College of Hematologists Oct. 2006.