Publications

2024

1) M. Shellaiah; H.-C. Chen; K. Awasthi; B. Aazaad; N. Ohta; M.-C. Lin

An AIE active anthracene-based Schiff base probe for “turn-on” detection of Cu2+ ions: Demonstrations with nanostructural investigations, DFT,

cellular imaging, and real water analysis

Journal of Molecular Structure 1301, 137347-1~11 , (2024). Doi: 10.1016/j.molstruc.2023.137347

2) C.-Y. Yen, S. Rana, K. Awasthi, N. Ohta, Masahito Oh-e

Characterizing the photoluminescence of fluorescein-labeled cellulose in aqueous and alcohol solutions: influence of the cellulose backbone

Scientific Reports 14, Article number: 26223 (2024). Doi: 10.1038/s41598-024-72773-6

3) S. Narra; Y.-L. Chung; S. Rana; P. Rajamanickam; K. Awasthi; E. W.-G. Diau; N. Ohta
Surface Roughness Dependent Linear Electric Field Effects on the Exciton Absorption of Methylammonium Lead Triiodide Perovskite Films
J. Phys. Chem. C, 128, 40, 17134–17140 (2024). Doi: 10.1021/acs.jpcc.4c04645.

2023

1) Aneesha, N. Ohta, M. S. Mehata

In situ synthesis of WS2 QDs for Sensing of H2O2: Quenching and Recovery of Absorption and Photoluminescence
Materials Today Communications 34, 105013-1~11 (2023) Doi: 10.1016/j.mtcomm.2022.105013

2) K. Awasthi, S.-P. Li, C.-Y. Zhu, H.-Y. Hsu, N. Ohta

Fluorescence Microscopic Approach for Detection of Two Different Modes of Cell Death Induced by Nanosecond Pulsed Electric Field in Breast

Cancer Cells

Sensors and Actuators B: Chemical, 378, 133199 (2023) Doi: 10.1016/j.snb.2022.133199

3) Kamlesh Awasthi, Tsai-En Wu, Hsin-Yun Hsu, Nobuhiro Ohta

Application of Nanosecond Pulsed Electric Field and Autofluorescence Lifetime Microscopy of FAD in Lung Cells

The Journal of Physical Chemistry B, 127, 25, 5566–5575 (2023) Doi: 10.1021/acs.jpcb.3c01148

4) Rana, Shailesh; Awasthi, Kamlesh; Diau, Eric; Ohta, Nobuhiro

Interface and Temperature Sensitive Linear Electric Field Effects on Exciton Absorption of CH3NH3PbI3 Perovskite Film

The Journal of Physical Chemistry C, 127, 24383−24392 (2023) Doi: 10.1021/acs.jpcc.3c05603

2022

1) K. Awasthi, F.-L. Chang, T.-E. Wu, H.-Y. Hsu, N. Ohta

Modulation of calcium signaling by nanosecond electric pulses and cell death through apoptosis in A549 lung cancerous cells.

Sensors and Actuators B: Chemical, 2022, 369: 132348 (2022) Doi:10.1016/j.snb.2022.132348

2) A. H. Bhosale, S. Narra, S. S. Bhosale, Po-Sen Liao, N. Ohta, E. W.-G. Diau
Femtosecond relaxation dynamics of two-dimensional BiOI nanoplatelets as efficient photocatalysts
J. Chin. Chem. Soc. (2022). Doi:10.1002/jccs.202100279

3) S. Narra, S.-E. Tsai, K. Awasthi, S. Rana, E. W.-G. Diau, N. Ohta
Photoluminescence of P3HT:PCBM bulk heterojunction thin films and effect of external electric field
J. Chin. Chem. Soc. (2022). Doi: 10.1002/jccs.202100267

4) M. Shellaiah, K. Awasthi, S. Chandran, B. Aazaad, K. W. Sun, N. Ohta, S.-P. Wu, M.-C. Lin
Methylammonium tin tribromide quantum dots for heavy metal ion detection and cellular imaging
ACS App. Nano Mater.5, 2, 2859-2874 (2022). Doi: 10.1021/acsanm.2c00028

5) R. Arumugaperumal, D. Y. Alene, M. Shellaish, V. Srinivasadesikan, K. Awasthi,K. W. Sun, M.-C. Lin, N. Ohta, W.-S. Chung
Construction of anisotropic nanostructures by self-assembly of aggregation-induced emission driven from tris-branched [2]rotaxane based molecular zipper
Materials Today Chemistry 24, 100997-1~12 (2022). Doi: 10.1016/j.mtchem.2022.100997

6) M. Shellaiah, N. Thirumalaivasan, B. Aazaad, K.Awasthi, K. W. Sun,* S.-P. Wu, M.-C. Lin, N. Ohta
An AIEE Active Anthracene-Based Nanoprobe for Zn2+ and Tyrosine Detection Validated by Bioimaging Studies
Chemosensors 10(10) 381 (2022). Doi: 10.3390/chemosensors10100381

2021

1) S. Rana, K. Awasthi, E.W.-G. Diau, N. Ohta
Illumination power-dependent electroabsorption of excitons in a CH3NH3PbI3 perovskite film
J. Phys. Chem. C 125, 50, 27631–27637 (2021).

2) M. S. Mehata, M. K. Singh, K. Awasthi, P. Sharma, S. Rana, N. Ohta
Temperature-Dependent Electric Field Induced Optical Transitions of 2D-Molybdenum Disulfide (MoS 2 ) Thin Films: Temperature-Dependent

Electroabsorption and Absorption,
J. Phys. Chem. C 125, 48, 26566–26574 (2021).

3) K. Awasthi, F.-L. Chang, H.-Y. Hsu, N. Ohta
Cancer specific cell death by electric field: A possible key mechanism in cell-competition and photodynamic action

Sensors and Acutuators b: Checmical 347, 130635-1~10 (2021).

4) M. Shellaiah, Y.-T. Chen, N. Thirumalaivasan, B. Aazaad, K. Awasthi, K. W. Sun, S.-P. Wu, M.-C. Lin, N. Ohta
Pyrene-Based AIEE Active Nanoprobe for Zn2+ and Tyrosine Detection Demonstrated by DFT, Bioimaging, and Organic Thin film
Transistor
ACS Appl. Mater. Interfaces 13, 28610-28626 (2021).

2020

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.

2019

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).

2018

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).

2017

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).

2016

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)

三原色、色の識別、加法混色、減法混色、色相環

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

光と生命の事典編集委員会（真嶋哲朗、飯野盛利、七田芳則、藤堂剛）、

朝倉書店, (2016) (2月25発行) p.4-5.

7) 飯森俊文、太田信廣,

光と電場による有機導体とイオン伝導体の電気伝導制御

(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

　蛍光寿命イメージングの基礎と細胞内環境計測への応用、

バイオマテリアル-生体材料—、34(3), 210-215 (2016)

2015

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

　 NADHの自家蛍光寿命イメージングを用いた細胞内環境計測、

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).

Ohta Laboratory

PUBLICATIONS