1) K. Awasthi, F.-L. Chang, P.-Y. Hsieh, H.-Y. Hsu, N. Ohta,

    Charactrization of endogenous fluorescence in non-small lung cancerous cells: A comparison with non-malignant lung normal cells

    J. Biophotonics. 13, e201960210-1~13 (2020)

2) K. Awasthi, K. Kala, S. Rana, E. W.-G. Diau, N. Ohta
    Switching between Spectral Broadening and Narrowing of the Exciton Absorption Band of a CH3NH3PbI3 Film on Altering the Polarity of an Applied          Electric Field

    Appl. Phys. Lett. 116, 251101-1~5 (2020).

3) M.Shellaiah, N.Thirumalavasan, B.AaZaad, K.W.Sun, S.-P. Wu, M.-C. Lin, N.Ohta

    Novel rhodamine probe for colorimetric and fluorescent detection of Fe3+ ions in aqueous media with cellular imaging

    Spectrochem. Acta A 242, 118757-1~9 (2020)

4) R. Arumugaperumal, M. Shellaiah, V. Srinivasadesikan, K. Awasthi, K. W. Sun, M. C. Lin, N. Ohta, W.-S. Chung

    Diversiform Nanostructures Constructed from Tetraphenylethene and Pyrene-based Acid-Base Controllable Molecular Switching Amphiphilic [2]                Rotaxanes with Tunable Aggregation-Induced Static Excimer

   ACS Appl. Mater. Interfaces 12, 45222-45234 (2020)

5) M.Hamada, S.Rana, E.Jokar, K.Awasthi, E.W.-G.Diau, N.Ohta

    Temperature Dependent Electroabsorption Spectra and Excitation Binding Energy in Perovskite CH3NH3PbI3 Nanocrystalline Film

    ACS Appl. Energy Mater, 11830-11840 (2020)

6) K.Awasthi, K.Yamamoto, K.Furuya, T.Nakabayashi, L.Li, N.Ohta

    Fluorescence Characteristics and Lifetime Images of Photosensitizers of Talaporfin Sodium and Sodium Pheophorbide a in Normal and Cancer Cells
    Prime Archives in Sensors”, Ed., Xin-Wei Yao, Vide Leaf, Hyderbad, India, 2020, p. 1-20
    DOI: 10.37247/PASen.1.2020.19.



1) T. Iimori, K. Awasthi, C.-S. Chiou, E. W.-G. Diau, N. Ohta,

     Fluorescence enhancement induced by quadratic electric-field effects on dynamics of singlet exciton in poly(3-hexylthiophene) dispersed in                       poly(methyl methacrylate)

     Physical Chemistry Chemical Physics (PCCP) 21, 5685-5704 (2019).

2) N. Ohta, K. Awasthi, H.-Y. Hsu, P.-Y. Hsieh,

    Differentiation between normal and cancer cells with autofluorescence lifetime microscopy and nanosecond pulsed electric field effects

    SPIE Proc. 10890, 108901F-1~8 (2019).

3) K. Awasthi, C.-S. Chiou, T. Iimori, E. W.-G. Diau, N. Ohta,

    Effects of external electric field on fluorescence of p-conjugated polymer film of P3HT sandwiched between FTO and PMMA

    J. Phys. Chem. C. 123(20), 12647-12658 (2019).

4) S. Rana, K. Awasthi, S. S. Bhosale, Er. W.-G. Diau, N. Ohta,

    Temperature Dependent Electroabsorption and Electro-photoluminescence and Exciton Binding Energy in MAPbBr3 Perovskite Quantum Dots

    J. Phys. Chem. C 123, 19927-19937 (2019).


5) V. Kattoor, K. Awasthi, E. Jokar, E. W.-G. Diau, N. Ohta

    Enhanced Dissociation of Hot Excitons with an Applied Electric Field under Low-power Photoexcitation in Two-dimensional Perovskite Quantum Wells

    J. Phys. Chem. Lett. 10, 4752-4757 (2019).



1) M. Hamada, K. Okoshi, S. Rana, K. Awasthi, T. Iimori, E. W.-G. Diau, N. Ohta

    Inhomogeneous Photoluminescence Characteristic in Carbon Nanodots and Electrophotoluminescence Measurements

    J. Phys. Chem. C 122(11), 6463-6474 (2018).

2) K. Awasthi, K.-B. Du, C.-Y. Wang, C.-L. Tsai, M. Hamada, S. Narra, E. W.-G. Diau, N. Ohta,

    Electroabsorption Studies of Multi-Colored Lead Halide Perovskite Nanocrystalline Solid Films

    ACS Photonics 5(6), 2408-2417 (2018).


3) T. Iimori, K. Awasthi, C.-S. Chiou, E. W.-G. Diau, N. Ohta,

    Influence of External Electric Fields on Photoluminescence and Charge Carrier Dynamics of p-Conjugated Polymer P3HT in Multilayer Films with              Heterojunctions to TiO2 and Sb2S3

    ACS Applied Energy Materials 1(11), 6136-6151 (2018).


4) V. Kattoor, K. Awasthi, E. Jokar, E. W.-G. Diau, and N. Ohta

    Integral Method Analysis of Electoabsorption Spectra and Electrophotoluminescence Study of (C4H9NH3)2Pbl4 Organic-Inorganic Quantum Well

    J. Phys. Chem. C 122(46), 26623-26634 (2018).


5) F. Sabeth, R. Khaton, Md. S. Islam, T. Iimori and N. Ohta

    Reversible photocurrent switching in ionic and superionic conductors of polycrystalline silver iodide

    J. Phys Chem C 122(47), 26790-26796 (2018).





1) C.-C. Tu, K. Kamlesh, K.-P. Chen, C.-H. Lin, M. Hamada, N. Ohta, Y.-K. Li

    Time-Gated Imaging on Live Cancer Cells Using Silicon Quantum Dot Nanoparticles with Long-Lived Fluorescence

    ACS Photonics 4, 1306-1315 (2017).


2) K. Awasthi, T. Nakabayashi, L. Li, N. Ohta

    Effects of Nanosecond Pulsed Electric Field on Intracellular NADH Autofluorescence: A Comparison between Normal and Cancer Cells

    ACS Omega 2, 2916-2924 (2017).


3) K. Awasthi, C.-Y. Wang, A. Fathi, S. Narra, E. W.-G. Diau, N. Ohta

    Anisotropic Electric Field Effect on Photoluminescence of CH3NH3PbI3 Perovskite Sandwiched between Conducting and Insulating Films

    J. Phys. Chem. C 121, 22700-22706 (2017).


4) T. Nakabayashi, K. Awasthi, N. Ohta,

    Application of Fluorescence Lifetime Imaging (FLIM) to Measure Intracellular Environments in a Single Cell in“Multi-Parametric Live Cell Microscopy          of 3D Tissue Models”

    Springer, Chapter 8, pp. 121-133 (2017).



1) T. Iimori, R. Ito, N. Ohta, H. Nakano

    Stark spectroscopy of rubrene. I. Electroabsorption spectroscopy and molecular parameters

    J.Phys. Chem. A 120, 4307-4313 (2016).


2) T. Iimori, R. Ito, N. Ohta

    Stark spectroscopy of rubrene. II. Stark fluorescence spectroscopy and fluorescence quenching

    J. Phys. Chem. A 120, 5497-5503 (2016).


3) K. Awasthi, Nakabayashi, N. Ohta

    Effects of Nanosecond Pulsed Electric Field on Intracellular Function of HeLa Cells as Revealed by NADH Autofluorescence Microscopy

    ACS Omega 1, 396-406 (2016).


4) K. Awasthi, D. Moriya, T. Nakabayashi, L. Li and N. Ohta

    Sensitive detection of intracellular environment of normal and cancer cells by autofluorescence lifetime imaging

    J. Photochem. Photobiol. B 165, 256-265 (2016).


5) N. Ohta, K. Awasthi, K. Okoshi, K. Manseki, H. Miura, Y. Inoue, E. Nakamura, H. Kono, E.W.-G. Diau

    Stark Spectroscopy of Absorption and Emission of Indoline Sensitizers: A Correlation with the Performance of Photovoltaic Cells

    J. Phys. Chem. C 120, 26206-26216 (2016).


6) 太田信廣

    光と色とスペクトル (Light, color, and spectrum)


    光と生命の事典 (Encyclopedia of Photobiology)、日本光生物学協会 


    朝倉書店, (2016) (2月25発行) p.4-5.


7) 飯森俊文、太田信廣,


    (Tuning electrical conductivity by photoirradiation and application of electric field in organic conductors and ionic conductors)、

    応用物理 (OYO BUTURI) 85(6), 466-473 (2016).

8) 中林孝和、太田信廣


    バイオマテリアル-生体材料—、34(3), 210-215 (2016)





1) K. Oinuma, T. Iimori and N. Ohta

    Time-resolved measurements of photoinduced change in electrical conductivity of the molecular conductor l-(BETS)2FeCl4

    J. Phys. Chem. Solids 86, 5-10 (2015).


2) K. Furukawa, K. Hino, N. Yamamoto, K. Awasthi, T. Nakabayashi, N. Ohta and H. Sekiya

    External electric field effects on excited-state intramolecular proton transfer in 4’-N,N-dimethylamino-3-hydroxyflavone in poly(methyl methacrylate)            films

   J. Phys. Chem. A 119, 9599-9608 (2015).


3) K. Sugiura, T. Nagai, M. Nakano, H. Ichinose, T. Nakabayashi, N. Ohta, T. Hisabori

    Redox sensor proteins for highly sensitive direct imaging of intracellular redox state

    Biochem. Biophys. Res. Commun. 457, 242-248 (2015).


4) K. Awasthi, H.-Y. Hsu, H.-C. Chiang, C.-L. Nai, C.-Y. Yeh, E. W.-G. Diau, N. Ohta

    Electroabsorption spectra of push-pull porphyrins in solution and in solid films

    J. Porphyrins Phthalocyanines 19, 527-534 (2015).


5) K. Awasthi, T. Iimori, N. Ohta

    Electroabsorption Spectra of Quantum Dots of PbS and Analysis by the Integral Method

    J. Phys. Chem. C 119, 4351-4361 (2015).


6) R. Maeda, H. Yaku, T. Nakabayashi. T. Murashima, N. Sugimoto, N. Ohta, D. Miyoshi

    DNA G-quadruplex detection system employing a protein fibril ligand

    Telomere and Telomerase 2:e691, 1-7 (2015).


7) F. Sabeth, Md S. Islam, T. Endo, N. Ohta

    Time-Resolved Photoexcitation Dynamics of Electrical Conductivity of Magnetic Organic Superconductor l-(BETS)2Fe0.45Ga0.55Cl4

    Rapid Communication in Photoscience 4(1), 25-28 (2015).


8) K. Awasthi, K. Yamamoto, K. Furuya, T. Nakabayashi, L. Li, N. Ohta,

    Fluorescence Characteristics and Lifetime Images of Photosensitizers of Talaporfin Sodium and Sodium Pheophorbide a in Normal and Cancer Cells

    Sensors 15, 11417-11430 (2015).


9) R. Ito, Y. Funamoto, N. Ohta, T. Iimori,

    Electroabsorption spectroscopy of electronic transition for room-temperature ionic liquid molecules dispersed in a polymer matrix

    Chem. Phys. 456, 1-7 (2015).


10) T. Nakabayashi, N. Ohta

      Sensing of Intracellular Environments by Fluorescence Lifetime Imaging of Exogenous Fluorophore, “Special Issue: Molecular Imaging for                          Bioanalysis”,

      Analytical Science, 31, 275-285 (2015).(Review)


11) 中林孝和、太田信廣


      光学 44(6), 221- 226 (2015).


12) 木下修一、太田信廣、南不二夫、永井健治、編

   「発光の事典」、朝倉書店、 (2015).