Rosantha Kumara

Profile Information

Affiliation: Research Scientist, Industrial Application and Partnership Division, Japan Synchrotron Radiation Research Institute

Researcher number: 50912341
ORCID iD: https://orcid.org/0000-0001-9160-6590
J-GLOBAL ID: 202101018081303967
Researcher ID: A-7147-2017
researchmap Member ID: R000019950

Research Interests

Research Areas

Nanotechnology/Materials / Functional solid-state chemistry / Nanoparticles, Thin films, Amorphous, High-energy X-ray diffraction, X-ray absorption fine structure spectroscopy, Hard X-ray photoelectron spectroscopy

Research History

Apr, 2024 - Present

Research Scientist, Industrial Application and Partnership Division, Japan Synchrotron Radiation Research Institute
Apr, 2021 - Mar, 2024

(Tenure-track researcher), Industrial Application and Partnership Division, Japan Synchrotron Radiation Research Institute
Jan, 2020 - Mar, 2021

(Special Researcher), Synchrotron X-ray Station at SPring-8, National Institute for Materials Science
Oct, 2017 - Dec, 2019

(Postdoctoral Researcher), Diffraction and Scattering Division, Japan Synchrotron Radiation Research Institute
Oct, 2012 - Sep, 2017

(Postdoctoral Researcher), Synchrotron X-ray Station at SPring-8, National Institute for Materials Science
May, 2012 - Sep, 2012

(Postdoctoral Researcher), Department of Physics, Kyushu University
Apr, 2010 - Mar, 2012

(Research Assistant), Department of Physics, Kyushu University
Apr, 2007 - Mar, 2009

(Guest Researcher), Department of Craft Art, Kyushu Sangyo University
May, 2006 - Mar, 2007

(Visiting Researcher), Department of Physics, Kyushu University

Education

Apr, 2009 - Apr, 2012

Doctor of Science in Physics, Department of Physics, Kyushu University
Apr, 2007 - Mar, 2009

Master of Science in Physics, Department of Physics, Kyushu University
Jun, 1999 - Jul, 2003

Bachelor of Science in Engineering Physics, Department of Physics, University of Colombo

Papers

Controlling Thermal Conductivity of Amorphous SiOx Films through Structural Engineering Utilizing Single Crystal Substrate Surfaces

Katelyn A. Kirchner, Sohei Ogasawara, Melbert Jeem, Hiromichi Ohta, Akihiro Suzuki, Hiroo Tajiri, Tomoyuki Koganezawa, Loku Singgappulige Rosantha Kumara, Junji Nishii, John C. Mauro …

Nano Letters, May 14, 2025
Reaction-driven formation of anisotropic strains in FeTeSe nanosheets boosts low-concentration nitrate reduction to ammonia

Jiawei Liu, Yifan Xu, Ruihuan Duan, Mingsheng Zhang, Yue Hu, Mengxin Chen, Bo Han, Jinfeng Dong, Carmen Lee, Loku Singgappulige Rosantha Kumara …

Nature Communications, Apr 16, 2025
Facile Synthesis of Sponge-like Microstructured CuO Anode Material for Rechargeable Lithium-Ion Batteries

W. T. R. S. Fernando, T. H. N. G. Amaraweera, K. M. D. C. Jayathilaka, L. S. R. Kumara, O. Seo, K. Osaka, O. Sakata, R. P. Wijesundera, H. W. M. A. C. Wijayasinghe

Coatings, Apr 15, 2025
Strategy Formulation for Mitigating Capacity Fading of Na‐Layered Oxides

Jun Pan, Yanhong Liu, Yuanwei Sun, Okkyun Seo, Rosantha Kumara, Yuwei Liu, Takeshi Watanabe, Jian Yang, Shixue Dou, Chongyin Yang …

Angewandte Chemie International Edition, Mar 30, 2025
Selective phase growth of ultra-smooth Ti2O3 and TiO2 thin films at low growth temperature controlled by the oxygen partial pressure

Jiayi Tang, Okkyun Seo, Jaemyung Kim, Ibrahima Gueye, L.S.R. Kumara, Ho Jun Oh, Wan-Gil Jung, Won-Jin Moon, Yong Tae Kim, Satoshi Yasuno …

Applied Surface Science Advances, Mar, 2025
Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu2O Thin-Film Semiconductors

H. E. Wijesooriya, J. A. Seneviratne, K. M. D. C. Jayathilaka, W. T. R. S. Fernando, P. L. A. K. Piyumal, A. L. A. K. Ranaweera, S. R. D. Kalingamudali, L. S. R. Kumara, O. Seo, O. Sakata …

Physchem, Feb 8, 2025
Segregation-dislocation self-organized structures ductilize a work-hardened medium entropy alloy

Bojing Guo, Dingcong Cui, Qingfeng Wu, Yuemin Ma, Daixiu Wei, Kumara L. S. R, Yashan Zhang, Chenbo Xu, Zhijun Wang, Junjie Li …

Nature Communications, Feb 8, 2025
Designing interfacially stable Na-ion polymer electrolytes with tailored local solvation structures

Jun Pan, Xinran Gao, Yanhong Liu, Okkyun Seo, Rosantha Kumara, Yuwei Liu, Takeshi Watanabe, Bing Zhu, Zhongchao Bai, Shixue Dou …

Chemical Communications, 2025
A Study on Cu Thin-Film Electroplated TiO2 Photoanodes for Applications in Natural Dye-Sensitized Solar Cells

M. D. P. A. Shakya, K. M. D. C. Jayathilaka, W. T. R. S. Fernando, W. T. M. A. P. K. Wanninayake, L. S. R. Kumara, O. Seo, J. Tang, O. Sakata, W. P. Siripala, R. P. Wijesundera

Crystals, Dec 29, 2024
Deformation mechanism of a metastable medium entropy alloy strengthened by the synergy of heterostructure design and cryo-pre-straining

Shilei Liu, Haitao Gao, Daixiu Wei, Charlie Kong, L.S.R. Kumara, M.W. Fu, Hailiang Yu

International Journal of Plasticity, Dec, 2024
Negative spin polarization and effect of composition on the atomic order and electronic structure of Mn2VAl Heusler alloy thin films

Hirofumi Suto, Vineet Barwal, Keisuke Masuda, Kodchakorn Simalaotao, Taisuke Sasaki, Yoshio Miura, Hiroo Tajiri, Loku Singgappulige Rosantha Kumara, Tomoyuki Koganezawa, Yuya Sakuraba

Physical Review Materials, Nov 12, 2024
Enhancing atomic ordering, magnetic and transport properties of Mn2VGa Heusler alloy thin films toward negatively spin-polarized charge injection

Z.H. Li, H. Suto, V. Barwal, K. Masuda, T.T. Sasaki, Z.X. Chen, H. Tajiri, L.S.R. Kumara, T. Koganezawa, K. Amemiya …

Acta Materialia, 276 120110-120110, Sep, 2024
Cu2O Homojunction Solar Cells: Efficiency Enhancement with a High Short Circuit Current

S. A. A. B. Thejasiri, K. M. D. C. Jayathilaka, F. S. B. Kafi, L. S. R. Kumara, O. Seo, S. Yasuno, O. Sakata, W. Siripala, R. P. Wijesundera

Coatings, 14(8) 932-932, Jul 25, 2024
High stability of the ferroelectricity against hydrogen gas in (Al,Sc)N thin films

NANA SUN, Kazuki Okamoto, Shinnosuke Yasuoka, Soshun Doko, NAOKO, Toshikazu Irisawa, Koji Tsunekawa, Takayoshi Katase, tomoyuki koganezawa, Tomotaka Nakatani …

Applied Physics Letters, Jul 15, 2024
Computational Discovery of Optimal Dopants for Nickel Iron Oxyhydroxide to Enhance OER Activity and Saline Water Compatibility

Hyeonjung Jung, Jihyeon Song, Yechan Lee, Han Sol Jung, Kyung-Jong Noh, Hyeonae Im, Yoojin Lee, Tae Yong Kim, Okkyun SEO, Takeshi Watanabe …

ACS Energy Letters, May 10, 2024
Epitaxial growth of crystalline thin-films of perfluorinated copper phthalocyanine on the single-crystal copper phthalocyanine

Yasuo Nakayama, Yuki Nakanishi, Rosantha Kumara, Tomoyuki Koganezawa

Journal of Crystal Growth, 621 127365-127365, Nov, 2023
Well-ordered molecular heterojunction of epitaxial C₆₀ on single-crystal dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DNTT)

Yasuo, Kosei Ito, Riku Takeuchi, Ryohei Tsuruta, Kaname Yamauchi, Seiichiro Izawa, Masahiro Hiramoto, Rosantha Kumara, tomoyuki koganezawa

Applied Physics Express, 16(10) 101001-101001, Oct 1, 2023
Persistent Homology and Bond Orientational Order in Ir–Cu Solid-Solution Alloy Nanoparticles: Implications for Electrocatalysts

Loku Singgappulige Rosantha Kumara, Okkyun Seo, Jaemyung Kim, Fenglong Wang, Yanna Chen, Ibrahima Gueye, Chulho Song, Koji Ohara, Kohei Kusada, Hiroshi Kitagawa …

ACS Applied Nano Materials, Sep 6, 2023
Origin of negative anisotropic magnetoresistance effect in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Fe</mml:mi><mml:mrow><mml:mn>0.75</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Co</mml:mi><mml:mrow><mml:mn>0.25</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> single-crystal thin films upon Ir addition

Ryo Toyama, Satoshi Kokado, Keisuke Masuda, Zehao Li, Varun K. Kushwaha, Taisuke T. Sasaki, Loku Singgappulige Rosantha Kumara, Tomoyuki Koganezawa, Hiroo Tajiri, Takahiro Yamazaki …

Physical Review Materials, 7(8), Aug 7, 2023
Continuous-Flow Chemical Synthesis for Sub-2 nm Ultra-Multielement Alloy Nanoparticles Consisting of Group IV to XV Elements

Hiroki Minamihara, Kohei Kusada, Tomokazu Yamamoto, Takaaki Toriyama, Yasukazu Murakami, Syo Matsumura, Loku Singgappulige Rosantha Kumara, Osami Sakata, Shogo Kawaguchi, Yoshiki Kubota …

Journal of the American Chemical Society, 145(31) 17136-17142, Jul 20, 2023

Misc.

α-PdHx中のH-Pd相互作用におけるナノサイズ効果

出倉駿, 小林浩和, 小林浩和, 池田龍一, 前里光彦, KUMARA L. S. R., 坂田修身, 北川宏

京都大学物性科学センター誌, (30), 2017
α相PdHxにおける固溶水素の状態

出倉駿, 小林浩和, 小林浩和, 池田龍一, 前里光彦, KUMARA Loku Singgappulige Rosantha, 坂田修身, 北川宏

分子科学討論会講演プログラム&要旨(Web), 11th, 2017
fcc,hcp構造を有する各のRuナノ粒子の原子配列構造

坂田修身, KUMARA L. S. R., 宋哲昊, 小原真司, 草田康平, 小林浩和, 北川宏

日本放射光学会年会・放射光科学合同シンポジウム(Web), 30th, 2017
新規fcc構造を有するルテニウムナノ粒子の合成とその物性

草田康平, 山本知一, 松村晶, 佐藤勝俊, 永岡勝俊, KUMARA Rosantha, 坂田修身, 北川宏

日本化学会講演予稿集, 95th(3), 2015
25aBB-3 Structural study and Ag-Ag correlation in molten and glassy state of Agx(GeSe_3)_<(1-x)>

Kumara L.S.R., Ohara K., Kawakita Y., Jovari P., Hidaka M., Takeda S.

Meeting abstracts of the Physical Society of Japan, 67(1) 836-836, Mar 5, 2012
25aEG-11 Ionic conduction path formation and micro-phase separation of Ag base superionic glasses.

Kumara L. S. R., Ohara K., Kawakita Y., Kohara S., Jovari P., Hidaka M., Sung N. E., Beuneu B., Inui M., Kajihara Y. …

Meeting abstracts of the Physical Society of Japan, 66(1) 808-808, Mar 3, 2011
24pRG-11 Local structure of superionic glasses Ag-Ge-Se System

KUMARA L. S. R., OHARA Koji, KAWAKITA Yukinobu, KOHARA Shinji, JOVARI Pal, HIDAKA Masanori, SUNG Nark E., BEUNEU Brigitte, TAKEDA Shin'ichi

Meeting abstracts of the Physical Society of Japan, 65(2) 707-707, Aug 18, 2010
23aHQ-2 Local structure of a Perovskite-type Lithium-ion conducting oxide

Ohara K., Kawakita Y., Kohara S., Inoue N., Kumara Rosantha, Hidaka M., Sung Nark Eon, Takeda S.

Meeting abstracts of the Physical Society of Japan, 65(1) 794-794, Mar 1, 2010
27aYB-6 Analysis of microstructure of liquid Bi-Sn alloys II

Ueno H., Tahara S., Kumara Rosantha, Wakisaka Y., Ohara K., Itou M., Kohara S., Kawakita Y., Takeda S.

Meeting abstracts of the Physical Society of Japan, 64(2) 714-714, Aug 18, 2009

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