SUSL Staff Directory

Dr. K.R. Koswattage

Senior Lecturer

koswattagekr@appsc.sab.ac.lk

Qualifications

Ph.D., Kobe University, March 2012

M.Sc., Kobe University, March 2009

B.Sc. (Honors), Special degree in Physics, University of Colombo, 2004


Profile

Dr. Kaveenga Rasika Koswattage (K.R. Koswattage) completed his PhD from Kobe University, Japan in 2012. He received his BSc special degree in Physics from University of Colombo in 2004 and MSc in Physics from Kobe University in 2009, respectively. He worked as an assistant professor in Chiba University, Japan from 2012 to 2016. Currently, he is working as a senior lecturer in Sabaragamuwa University of Sri Lanka. His research interest is on surface and interface analysis and characterization of some of organic, inorganic and biomaterials using synchrotron spectroscopies in VUV and soft x-ray region.

HONORS

  • Best poster award, for the poster “Site selective adsorption of atomic deuterium on a hexagonal boron nitride (h-BN) thin film”

K.R.Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa

The 6th International Conference on DVXα method, Daejeon, Korea, 2010.

  • Best research award for the research work of “Density of states evaluation of an insulating polymer by high-sensitivity ultraviolet photoemission spectroscopy”

T.Sato, K.R. Koswattage, Y. Nakayama, H.Ishii

18th Electrostatic conference of Japan, 2017-March, Tokyo University, Japan

  • Research award (Student section), for the poster “Modification of electronic state of DNTT monolayer on Au(111) surface by controlling the molecular arrangement”

Y. Hasegawa, T. Hosakai, Y. Wakayama, K.R. Koswattage, Y. Yamada, M. Sasaki

UVSOR symposium 2015, Okazaki, Japan, November 2015.

  • Obtained fellowship of Fellow of Advanced Science as research student at Japan Atomic Energy Agency, Tokaimura, Ibaraki, Japan, April 2008- March 2012.   
  • Obtained Japanese Government Scholarship (Monbukagusho) for doctoral study.  Kobe University, April 2009- March 2012. 
  • Obtained Japanese Government Scholarship (Monbukagusho) for 2nd year of master’s study. Kobe University, April 2008- March 2009.

 


Membership of Professional Bodies/Associations

  • The Physical Society of Japan-member.
  • The Chemical Society of Japan-member.
  • Japanese Society of Radiation Chemistry-member.
  • The Surface Science Society of Japan-member.
  • Japanese Society for Synchrotron Radiation Research-member.
  • Institute of Physics Sri Lanka-member.

Current Research Projects

SUCESSFUL RESEARCH PROPOSALS (only as the principal investigator)

 

“Investigation of the interaction of L-cysteine with noble metal surfaces & nanoparticles”

High Energy Accelerator Research Organization (KEK), Japan - Joint research program

Project No: 2015G068 (2015-2017)

 

“Determination of the interface electronic structure of L-cysteine with noble metal nanoparticles”

Joint research program of Institute for molecular science, Japan.

Project No: 27-509 (2015-2016)

 

“Interaction of L-cysteine with noble metal nanoparticles studies by photoemission spectroscopy”

Joint research program of Institute for molecular science, Japan.

Project No: 26-555 (2014-2015)

 

“Electronic structure of amino acids assembly studies by UPS”

Joint research program of Institute for molecular science, Japan.

Project No: 25-562 (2013-2014)

 

“Electronic structure of amino acids assembly studies by UPS”

Joint research program of Institute for molecular science, Japan.

Project No: 24-824 (2012-2013)


Recent Publications

 

(1). “Density of states evaluation of an insulating polymer by high-sensitivity ultraviolet photoemission spectroscopy”

T.Sato, K.R. Koswattage, Y. Nakayama, H.Ishii

Applied Physics Letters, 110, 11,111102, (2017)

 

(2). “Overlapping of Frontier Orbitals in Well-Defined DNTT and Picene Monolayers”,

Y. Hasegawa, Y.Yamada, T. Hosokai, K.R. Koswattage, Masahiro Sasaki

J. Phys. Chem. C, 120, 38, (2016)

 

(3). “A Theoretical Interpretation of NEXAFS of a Deuterated Hexagonal Boron Nitride Thin Film”

K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa,

International Journal of Materials Science and Engineering, 4, 4, 179, (2016)

 

(4). “Interface electronic structures of the L-cysteine on noble metal surfaces studied by ultraviolet photoelectron spectroscopy”,

K.R. Koswattage, H. Kinjo, Y. Nakayama, H. Ishii

e-J. Surf. Sci. Nanotech. 13, 373, (2015)

 

(5). “Electronic Structures of a Well-Defined Organic Hetero-Interface: C60 on Pentacene Single Crystal”,

M. Yamamoto, Y. Nakayama, Y. Uragami, H. Kinjo, Y. Mizuno, K. Mase, K. R. Koswattage, H.Ishii

e-J. Surf. Sci. Nanotech. 13, 59, (2015)

 

(6). Electronic Structure of Chlorophyll a Solution Investigated by Photoelectron Yield Spectroscopy

Y. Takeda, H. Ezawa, T. Miyauchi, H. Kinjo, K. R. Koswattage, Y. Nakayama, H. Ishii,

Applied Mechanics and Materials, 763, 58, (2015)

 

(7). "Determination of the highest occupied molecular orbital energy of pentacene single crystals by ultraviolet    photoelectron and photoelectron yield spectroscopies"

Y. Nakayama, Y. Uragami, M. Yamamoto, S. Machida, H. Kinjo, K. Mase, K.R Koswattage, H. Ishii  

Jpn. J. Appl. Phys., 53, 01AD03, (2014).

(8). “Full picture of valence band structure of rubrene single crystals probed by angle-resolved and excitation-energy-dependent photoelectron spectroscopy”,

Y. Nakayama, Y. Uragami, S. Machida, K. R. Koswattage,  H. Setoyama,  T. Okajima, K. Mase, H. Ishii,

Appl. Phys. Express, 5, 111601, (2012).

 

(9). “Selective adsorption of atomic hydrogen on a h-BN thin film”,

K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa,

J. Chem. Phys., 135, 014706 - 1~13, (2011).

 

(10). “Study on selective adsorption of deuterium on boron nitride using photon-stimulated ion- desorption”,

K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa,

Appl. Surf. Sci., 258, 1561 -1564, (2011).

 

(11). “Photoabsorption cross section of C60 thin films from the visible to vacuum ultraviolet”,

H. Yagi, K. Nakajima, K.R. Koswattage, K. Nakagawa, C. Huang, S.I. Md. Prodhan,

B.P. Kafle, H. Katayanagi, K. Mitsuke,

Carbon, 47, 1152-1157, (2009).

 

(12). “Photoabsorption cross section of C70 thin films from the visible to vacuum ultraviolet”,

J. Chem.Phys., 130, 234510 - 1~4, (2009).

H. Yagi, K. Nakajima, K. R. Koswattage, K. Nakagawa, H. Katayanagi, K. Mitsuke,

 

Proceedings papers, reports (reviewed)

 

(13). “Determination of the interface electronic structure of L-cysteine/Ag(111) by Ultraviolet Photoelectron Spectroscopy and Photoelectron Yield Spectroscopy”,

K.R. Koswattage, K. Hiroumi, Y. Nakayama & H. Ishii

Advances in Future Manufacturing Engineering – Guohui Yang (Ed.)

In press, Taylor & Francis Group, London, 16-25, (2015)

(ISBN 978-1-138-02817-3)

 

(14). “Structural Requirements for Surface-Induced Aromatic Stabilization”

T. Hosokai, K. Yonezawa, K. Kato, J. Yang, K. R. Koswattage, A. Gerlach,  F. Schreiber, N. Ueno, S. Kera

MRS Proceedings, 1647, 348, (2014)

 

(15). “Reconstruction of the Beamline BL2B for Development of Photoelectron Spectroscopy for Organic Materials II”
S. Kera, K. R. Koswattage, K. Yonezawa, Y. Nakayama, K. K. Okudaira and H. Ishii

UVSOR Activity Report, 40, (2014).

 

(16). “Direct Observation of Electronic Structure of Nylon-6,6 to Clarify the Contact Electrification Mechanism”

T. Sato, K. R. Koswattage, Y. Nakayama, H. Ishii

UVSOR Activity Report, 143, (2014).

 

(17). “Electronic Structure of Chlorophyll-a Investigated by Photoelectron Spectroscopy and Photoelectron Yield Spectroscopy”

Y. Takeda, H. Ezawa, T. Miyauchi, H. Kinjo, K. R. Koswattage, Y. Nakayama, H. Ishii

UVSOR Activity Report, 126, (2014).

 

 

(18). Investigation of Charge-Transfer Interaction by Metal Deposition on Organic Semiconducting Thin Films

T. Hosokai, K. Yonezawa, R. Makino, K. R. Koswattage, K. K. Okudaira and S. Kera

UVSOR Activity Report, 144, (2014).

 

 

(19). “Electronic Structure of C60 / Pentacene Single Crystal pn – Heterojunction”

 M.Yamamoto, Y. Nakayama, Y. Uragami, K. Mase, K. R. Koswattage,  H. Ishii

PF activity report, 30, (2013).

 

(20). “HATCN on ITO: work function variation and influence of air exposure”, 

K.R. Koswattage, A. Yoneyama, Y. Nakayama, H. Ishii,

UVSOR Activity Report, 151, (2013).

 

(21). “Efficiency of HATCN as a hole injection layer in a practical system”,  

A. Yoneyama, K.R. Koswattage, Y. Nakayama, H. Ishii,

UVSOR Activity Report, 150, (2013).

 

(22). “Electronic structure of organic donor-acceptor interfaces of a squaraine dye and C60”, 

Y. Nakayama, K.R. Koswattage, Y.Ozawa, H. Ishii,

UVSOR Activity Report, 149, (2013).

 

(23).“Structural requirements for the charge-transfer state formation through surface-induced  aromatic stabilization ”, 

T. Hosokai, Y. Yonezawa, K.R. Koswattage, N. Ueno, S. Kera,

UVSOR Activity Report, 152, (2013).

 

(24). “Reconstruction of the beamline BL 2B for development of photoelectron spectroscopy for organic materials”,  

S. Kera, K.R. Koswattage, K. Yonezawa, J. P. Yang, Y. Nakayama, K. Okudaira, H. Ishii,

UVSOR Activity Report, 38, (2013).

 

(25). “Measurements of transmittance and refelectance of LiTi2O4 and UPS measurements of   multi-alkali surfaces”,

R. Inagaki, T. Konomi, T. Tokushi, M. Katoh, E. Kako, S. Yamaguchi, Y. Kobayashi, N. Yamamoto, M. Hosoka, S. Shiraki, K.R. Koswattage, Y. Okano,

UVSOR Activity Report, 152, (2013).

 

(26). “Ultraviolet photoelectron spectroscopic study on the electronic structure of the L-cysteine ad-layers on the noble metal surfaces”,  

K.R. Koswattage, Y. Nakayama, H. Ishii,

UVSOR Activity Report, 90, (2012).

 

(27). “Electronic structure of the pentacene single crystal in the valance region”,

Y. Nakayama, Y. Uragami, M. Yamamoto, K. Mase, K.R.Koswattage, H. Ishii,

PF Activity Report, 13A, (2012).

 

(28).  “A theoretical interpretation of NEXAFS and XPS of a deuterated hexagonal boron nitride thin film”,

K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa,

PF Activity Report, 27B, 61, (2011).

(29). “Site-selective adsorption of atomic deuterium on a hexagonal boron nitride (h-BN) thin film”,

K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa,

Proceedings of the 6th International Conference on DVXα method, Daejeon , Korea,

Bullet. Soc. Disc. Variat. Xα 23, 205-212, (2010).

 

(30). “Site selective adsorption of atomic deuterium on boron nitride thin film”,

K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa,

PF Activity Report, 27B, 59, (2010).

 

(31). “NEXAFS analysis of a P-doped carbon alloy with two dimensional anistrophy”, 

I. Shimoyama, Y. Baba, T. Sekiguchi, K.R. Koswattage,

PF Activity Report, 83, (2010).

 

(32). “Photoabsorption Cross Section of C70 Thin Films from the Visible to Vacuum Ultraviolet”,  

H. Yagi, K. Nakajima, K. R. Koswattage, K. Nakagawa, H. Katayanagi and K. Mitsuke,

UVSOR Activity Report, 68, (2008).

 

(33). “Optical oscillator strength of DNA bases from 3 to 250eV and examination of the Thomas-Reiche-Kuhn sum rule”,

K.R. Koswattage, Y. Izumi, M. Tanaka and K. Nakagawa,

Proceedings of the 51st Conference of Japanese Society of Radiation Chemistry,

Tsukuba, Japan, 159-160, (2008).

 

Abstract of International/National Conferences (Only the first author)

 

Study on selective adsorption of deuterium on boron nitride using Photon-stimulated ion- desorption, K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, The 25th Conference of Japan Society for Synchrotron Radiation, January 6-9, 2012, Saga, Japan.

 Atomic hydrogen adsorption behavior of h-BN thin film on Ni(111), K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, The 31st Conference of Surface Science Society of Japan, December 15-17, 2011, Tokyo, Japan.

 Hydrogen adsorption behavior of h-BN thin film on Ni(111), K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, 22nd Annual meeting of Chemical Society of Japan – Ibaraki-ken, November 4, 2011, Tokai, Japan.

 Selective adsorption of atomic deuterium on BN thin film, K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, 15th International conference on thin films, November 8-11, 2011, Kyoto, Japan.

 Selective adsorption of atomic deuterium on BN thin film, K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, 28th Photon Factory Symposium, July 12-13, 2011, Tsukuba, Japan.

 Oscillator strength distribution of DNA bases from 3 to 250 eV, K.R. Koswattage, A. Mimoto, Y. Izumi, A. Imazu, M. Tanaka, M. Tanabe, K. Nakagawa, 37th International Conference on Vacuum Ultraviolet and X-Ray Physics, (VUVX 2010), July 11-16, 2010, Vancouver, BC, Canada.

 A rotatable photoelectron emission microscope combined with polarized synchrotron radiation, T. Sekiguchi, Y. Baba, I. Shimoyama, N. Hirao, A. Narita, M. Abdul, K.R. Koswattage, 37th International Conference on Vacuum Ultraviolet and X-Ray Physics, (VUVX 2010), July 11-16, 2010, Vancouver, BC, Canada.

 Selective adsorption of atomic deuterium on BN thin film, K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, The 91st Conference of Chemical Society of Japan March 26-29, 2011, Yokohama, Japan.

 Site-selective adsorption of atomic deuterium on BN thin film, K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, The 24th Conference of Japan Society for Synchrotron Radiation, January 6-9, 2011, Tsukuba, Japan.

 Site selective adsorption of atomic deuterium on BN thin film, K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, 65th Conference of Physical Society of Japan, September 23-26, 2010, Osaka, Japan.

 Site-selective adsorption of atomic deuterium on a hexagonal boron nitride thin film, K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, The 6th International Conference on DVXα method, August 4-6, 2010, Daejeon, Korea.

 Deuterium adsorption on hexagonal BN thin film on Ni(111), K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, The 23rd Conference of Japan Society for Synchrotron Radiation, January 6-9, 2010, Himeji, Japan.

 Study of hydrogen adsorption and desorption on boron nitride thin films by X-ray photoelectron spectroscopy, K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, 20th Annual meeting of Chemical Society of Japan – Ibaraki-ken, November 21, 2009, Hitachi, Japan.

 Study of hydrogen adsorption and desorption on boron nitride thin films by X-ray photoelectron spectroscopy, K.R. Koswattage, I. Shimoyama, Y. Baba, T. Sekiguchi, K. Nakagawa, The 11th International Conference on Electronic Spectroscopy and Structure, October 6–10, 2009, Nara, Japan.

 Optical oscillator strength of DNA bases from 3 to 250eV and examination of the Thomas-Reiche-Kuhn sum rule, K.R. Koswattage, Y. Izumi, M. Tanaka, K. Nakagawa, 51st Conference of Japanese Society of Radiation Chemistry, October 15-16, 2008, Tsukuba, Japan.

 Optical oscillator strength of DNA bases from 3 to 250eV and examination of the Thomas-Reiche-Kuhn sum rule, K.R. Koswattage, Y. Izumi, M. Tanaka, K. Nakagawa, 10th International Conference-Radiation Damage to DNA, June 8-12, 2008, Fukushima, Japan.