Nano Materials and Devices Laboratory
(NANOMADE-LAB)
Centre for Nanotechnology, IIT Roorkee
Research Publications: 47+ {Citations 2800+, h-index 22 and i10-index 32}
(* Corresponding Authors, # Equal Contributions)
After Joining the IITR
47. Engineering high-performance IR photodetectors: From material design to multifunctional applications
P. V. Pham, S. C. Lims, A. Kumar, R. K. Ulaganathan, R. I. Stantchev, R. Sankar
Chemical Engineering Journal 2025, 167554 (IF-13.2) PDF
https://doi.org/10.1016/j.cej.2025.167554
46. Modulation Doping and Reduced Hysteresis in Monochalcogenide InSe/GaS Heterostructure 2D Field-Effect Transistors
J. I. Deagueros, M. Gao, A. Cai, X. Li, R. K. Ulaganathan, S. Mani, R. Sankar, H. Ishida, X. P. A. Gao*
ACS Appl. Mater. Interfaces 2025, 17, 35723–35731 (IF-8.2) PDF
45. Manipulation of anisotropic Zhang-Rice exciton in van der Waals antiferromagnets NiPS3-xSex by anion substitution
D. Kumar, J. Khatua, N. T. Hoang, Y. Sim, R. K. Ulaganathan, R. Kalaivanan, R. Sankar, M.-J. Seong*, K.-Y. Choi*
npj 2D Materials & Applications, 2025, 9, 87(IF-8.8) PDF
44. Anisotropic screening of excitons in van der Waals materials
T.-H. Wu, C.-E. Hsu, R. K. Ulaganathan, R. Sankar, Z. Li, C.-C. Lee, C.-S. Chang . Kung-Hsuan Li, *
npj 2D Materials & Applications, 2025, 9, 37 (IF-8.8) PDF
43. Field-Angle Dependence of Phonon Thermal Hall Effect in Na2X2TeO6 (X=Co, Zn)
J. Yan, H. Takeda, H. Iwahata, R. K. Ulaganathan, K. Raju, R. Sankar, M. Yamashita
Scientific Reports, 2025, 15, 36640 (IF-3.9) PDF
42. Interplay of Td and 1T′ Phases Influencing the Transport Properties of MoxW1–xTe2 Weyl Semimetals
S. Choudhury, S. Kalal, R. K. Ulaganathan, R. Sankar, S. K. Mahatha*
J. Phys. Chem. C 2025, 129, 11407–11416 (IF-3.2) PDF
G. S. Murugan , J. Khatua, S. Kim , E. Mun , K. R. Babu , H.-S. Kim , C.-L. Huang , R. Kalaivanan, R. K. Ulaganathan ,I. P. Muthuselvam , W. T. Chen , S. Krishnamoorthi,K.-Y. Choi*,R. Sankar*
Physical Review B, 2025, 111, 144420. (IF-3.7) PDF
https://doi.org/10.1103/PhysRevB.111.144420
40. Anomalous spin dynamics and excitations of the quasizigzag chain compound AgCrP2S6.
H.-G.Lee, C. H. Koo, Y. G. Choi, Y. Oshima, R. K. Ulaganathan, R.Kalaivanan, R. Sankar, K.-Y. Choi*.
Physical Review B, 2025, 111, 134415. (IF-3.7) PDF
39. The dHvA effect in Sn-doped PbTe Topological Crystalline Insulator.
D. Miertschin, T. Nguyen, S. Zhang, M. Lee, S. Krishnamoorthi, R. K. Ulaganathan, R. Sankar,
D. E. Graf. K. Shrestha*.
J. Phys.: Condens. Matter, 2025, 37, 155501. (IF-2.6) PDF
DOI 10.1088/1361-648X/adb5e5
Before Joining the IITR
Post-Doctoral Works
38. Interplay between Magnetic and Lattice Excitations and Emergent Multiple Phase Transitions in MnPSe₃₋ₓSₓ.
D. Kumar, N. T. Hoang, Y. Sim, Y. Choi, K. Raju, R. K. Ulaganathan, R. Sankar, M. J. Seong, K. Y. Choi*.
Physical Review B, 2024, 110, 064414. (IF-3.7) PDF
"Published in Journal Cover Page"
37. Optical Probe of Magnetic Ordering Structure in Mn-substituted NiPS3.
J, -H. Lee, S. Lee, Y. Choi, L. Gries, R. Klingeler, K. Raju, R. K. Ulaganathan, R. Sankar, M.-J. Seong, K.-Y. Choi*.
Advanced Functional Materials, 2024, 2405153. (IF - 19) PDF
36. Structural, Magnetic and Electronic Properties of GdAsSe Single Crystal: Experimental and Theoretical Studies.
R. Kalaivanan, B. D. S. Chandana, R. K. Ulaganathan, S. M. Ganesan, K.-Y. Choi, I. P. Muthuselvam, R. Sankar*.
Physical Review B, 2024, 109, 184420. (IF-3.7) PDF
35. Efficient Hydrogen Evolution Reaction in 2H-MoS₂ Basal Planes Enhanced by Surface Electron Accumulation.
V. Krishnamoorthy, H. K. Bangolla, C.-Y. Chen, Y.-T. Huang, C. M. Cheng, R. K. Ulaganathan, R. Sankar, K.-Y.Lee, H.-Y. Du, L.-C. Chen, K.-H. Chen, R.-S. Chen*.
Catalysts, 2024, 14, 15. (IF-4) PDF
34. Quasi-1D MoS₂ Nanoribbons with Enhanced Edge Nonlinear Response and Photoresponsivity.
G. Ghimire, R. K. Ulaganathan, A. Tempez, O. Chenko, R. R. Unocic, J. Heske, D. I. Miakota, C. Xiang, M. Chaigneau, K. S. Thygesen, T. Booth, D. B. Geohegan, S. Canulescu*.
Advanced Materials, 2023, 35, 2302469. (IF-26.8) PDF
33. High-Performance Photodetector and Angular-Dependent Random Lasing from Long-Chain Organic Diammonium Sandwiched 2D Hybrid Perovskite Non-linear Optical Single Crystal.
R. K. Ulaganathan, P. K. Roy, S. M. Mhatre, R. C. Murugesan, W.-L. Chen, M.-H. Lai, A. Subramanian, C.-Y. Ling, Y.-M. Chang, A. Rozhin, C.-T. Liang, R. Sankar.
Advanced Functional Materials, 2023, 33, 2214078. (IF-19) PDF
32. Electrical and Optoelectronic Anisotropy and Surface Electron Accumulation in ReS₂ Nanostructures.
H. K. Bangolla, M. Y. Fakhri, C.-H. Lin, C.-M. Cheng, Y.-H. Lu, T.-Y. Fu, R. K. Ulaganathan, R. Sankar, R.-S. Chen*
Nanoscale, 2023, 15, 19735. (IF-5.1) PDF
DOI: 10.1039/D3NR04830F
31. Photoconduction Properties in Tungsten Disulfide Nanostructures.
H. K. Bangolla, Y.-C. Lee, W.-C. Shen, R. K. Ulaganathan, R. Sankar, H.-Y. Du*, Ruei-San Chen*
Nanomaterials, 2023, 13, 2190. (IF-4.3) PDF
30. A novel Two-step Route to Unidirectional Growth of Multilayer MoS2 Nanoribbons.
D. I. Miakota, G. Ghimire, R. K. Ulaganathan, M E. Rodriguez, S. Canulescu
Applied Surface Sciences, 2023, 619, 156748. (IF-6.9) PDF
29. Stable Formamidinium Based Centimeter Long Two-Dimensional (2D) Lead Halide Perovskite Single Crystal for Long-Live Optoelectronic Application.
R. K. Ulaganathan*, R. C. Murugesan* C. -Y. Lin, A. Subramanian, W.-L. Chen, Y.-M. Chang, A. Rozhin and R. Sankar*
Advanced Functional Materials, 2022, 32, 2112277. (IF-19) (* Corresponding Authors) PDF
28. Extended Air, Light, and Heat Resistive Organolead Halide Perovskite Single-Crystalline Microrods for High-Performance Photodetector.
C.-Y. Lin, R. K. Ulaganathan*, A. Subramanian, H.-C. Weng, Y.-J. Chang, R. C. Murugesan, R. Sankar, and A. Rozhin.
Materials Advances, 2022, 3, 8771-8779. (IF-4.7) (* Corresponding Authors) PDF
27. A Silicon-Based Two-Dimensional Chalcogenide of p-type Semiconducting Silicon Telluride Nanosheets for Ultrahigh Sensitive Photodetector Applications.
R. K. Ulaganathan*, C.-Y. Lin*, R. Sankar*, Raghavan Chinnambedu Murugesan, Ambika Subramanian, Alex Rozhin and Shaik Firdoz
Journal of Material Chemistry C, 2021, 9, 10478-10486. (IF-5.1) (* Corresponding Authors & # Equal Contribution) PDF
26. A Bi-anti-ambipolar Field Effect Transistor.
C. R. P. Inbaraj, R. J. Mathew, R. K. Ulaganathan, R. Sankar, M. Kataria, H. Y. Lin, Y. T. Chen, M. Hofmann, C. H. Lee, Y. F. Chen*
ACS Nano, 2021, 15, 8686-8693. (IF-16) PDF
25. Staggered Band Offset Induced High-Performance Optoelectronic Devices:Atomically Thin Vertically Stacked GaSe-SnS₂ van der Waals p-n Heterostructures.
P. Perumal, R. K. Ulaganathan, R. Sankar, L. Zhu*
Applied Surface Science, 2021, 535, 147480. (IF-6.9) PDF
https://doi.org/10.1016/j.apsusc.2020.147480
24. High-performance Flexible Broadband Photodetectors Based on 2D Hafnium Selenosulfide Nanosheets.
R. K. Ulaganathan, R. Sankar, C. Y. Lin, R. C. Murugesan, K. Tang, F. C. Chou*
Advanced Electronic Material, 2020, 6, 1900794. (IF-5.3) PDF
23. Unprecedented Random Lasing in 2D Organolead Halide Single-Crystalline Perovskite Microrods.
R. K. Ulaganathan#, P. K. Roy#, R. C. Murugesan, S. Mhatre, H. I. Lin, W. L. Chen, Y. F. Chen, Y. M. Chang, R. Sankar, F. C. Chou, C. T. Liang*
Nanoscale, 2020, 12, 18269-18277. (IF- 5.1) (#Equally Contribution) PDF
22. Modulating Charge Separation with Hexagonal Boron Nitride Mediation in Vertical Van der Waals Heterostructures.
C. R. P. Inbaraj, R. J. Mathew, R. K. Ulaganathan, R. Sankar, M. Kataria, H. Y. Lin, H. Y. Cheng, K. H. Lin, H. I. Lin, Y. M. Liao, F. C. Chou, Y. T. Chen, C. H. Lee, Y. F. Chen*
ACS Applied & Material Interfaces, 2020, 12, 26213-26221. (IF-8.2) PDF
21. Electron-Electron Interactions in 2D Semiconductor InSe.
A. S. Kumar, K. Premasiri, M. Gao, R. K. Ulaganathan, R. Sankar, F. C. Chou, X. P. A. Gao*
Physical Review B, 2020, 102, 121301(R) (IF-3.7) PDF
20. Hybrid InSe Nanosheets and MoS₂ Quantum Dots for High-Performance Broadband Photodetectors and Photovoltaic Cells.
R. K. Ulaganathan, K. Yadav, R. Sankar, F. C. Chou, Y. T. Chen*
Advanced Material Interfaces, 2019, 6, 1801336. (IF-4.4) PDF
19. Sn-doping Enhanced Ultra-high Mobility In1-xSnxSe Phototransistor.
C. R. P. Inbaraj, V. K. Gudelli, R. J. Mathew, R. K. Ulaganathan, R. Sankar, H. Y. Lin, H. I. Lin, Y. M. Liao, H. Y. Cheng, K. H. Lin, F. C. Chou, Y. T. Chen, C. H. Lee, G. Y. Guo, Y. F. Chen*
ACS Applied & Material Interfaces, 2019, 11, 24269-24278. (IF-8.2) PDF
Published in Journal Cover Page
18. Light and Matter Interaction in Two-Dimensional Atomically Thin Films.
R. K. Ulaganathan, Y. H. Chang, D. Y. Wang, S. S. Li*
Bulletin of the Chemical Society of Japan, 2018, 91, 761-771. (IF-3.8) PDF
17. Tuning Rashba Spin-Orbit Coupling in Gated Multilayer InSe.
K. Premasiri, S. K. Radha, S. Sucharitakul, R. K. Ulaganathan, R. Sankar, F. C. Chou, Y. T. Chen, X. P. A. Gao*
Nano Letters, 2018, 7, 4403-4408. (IF-9.1) PDF
16. Enhanced Light Emission from the Ridge of Two-dimensional InSe Flakes.
Y. Li, T. M. Wang, H. Wang, Z. P. Li, Y. W. Chen, D. West, R. Sankar, R. K. Ulaganathan, F. C. Chou, C. Wetzel, C. Y. Xu, S. B. Zhang, S. F. Shi*
Nano Letters, 2018, 18, 5078-5084. (IF-9.1) PDF
15. Ultra-high Performance Flexible Piezo Potential Gated In1-xSnxSe Phototransistor.
C. R. P. Inbaraj, R. J. Mathew, G. Haider, T. P. Chen, R. K. Ulaganathan, R. Sankar, K. P. Bera, Y. M. Liao, M. Kataria, H. I. Lin, Y. T. Chen, C. H. Lee, Y. F. Chen*
Nanoscale, 2018, 10, 18642-18650. (IF-5.1) PDF
14. Ultrasensitive Tunability of the Direct Bandgap of 2D InSe Flakes via Strain Engineering.
Y. Li, T. Wang, M. Wu, T. Cao, Y. W. Chen, R. Sankar, R. K. Ulaganathan, F. C. Chou, C. Wetzel, C. G. Xu, S. G. Louie, S. F. Shi*
2D Materials, 2018, 5, 021002. (IF-4.3) PDF
DOI 10.1088/2053-1583/aaa6eb
13. Lipid-Modified Graphene-Transistor Biosensor for Monitoring Amyloid-β Aggregation.
C. J. Kuo, H. C. Chiang, C. A. Tseng, C. F. Chang, R. K. Ulaganathan, T. T. Ling, Y. J. Chang, C. C. Chen, Y. R. Chen, Y. T. Chen*
ACS Applied & Material Interfaces, 2018, 10, 12311-12316. (IF - 8.2)PDF
https://doi.org/10.1021/acsami.8b01917
12. One-Step Synthesis of Antioxidative Graphene-Wrapped Copper Nanoparticles on Flexible Substrates for Electronic and Electrocatalytic Applications.
C. A. Tseng, C. C. Chen, R. K. Ulaganathan, C. P. Lee, H. C. Chiang, C. F. Chang, Y. T. Chen*
ACS Applied & Material Interfaces, 2017, 9, 25067-25072. (IF-8.2) PDF
11. Ambipolar Behaviors of Few-Layered InSe Field-Effect Transistors.
C. Y. Lin*, R. K. Ulaganathan, R. Sankar, F. C. Chou
AIP Advances, 2017, 7, 075314. (IF-1.4) PDF
10. Targeted and Efficient Activation of Channelrhodopsins Expressed in Living Cells via Specifically-Bound Upconversion Nanoparticles.
K. Yadav, A. C. Chou, R. K. Ulaganathan, H. D. Gao, H. M. Lee, C. Y. Pan, Y. T. Chen*
Nanoscale, 2017, 9, 9457-9466. (IF-5.1) PDF
9. Detection of K+ Efflux from Stimulated Cortical Neurons by an Aptamer-Modified Silicon Nanowire Field-Effect Transistor.
A. Anand, C. R. Liu, A. C. Chou, W. H. Hsu, R. K. Ulaganathan, Y. C. Lin, C. A. Dai, F. G. Tseng, C. Y. Pan, Y. T. Chen*
ACS Sensors, 2017, 2, 69-79. (IF - 9.1) PDF
8. High Photosensitivity and Broad Spectral Response of Multi-layered Germanium Sulfide Transistors.
R. K. Ulaganathan, Y. Y. Lu, C. J. Kuo, S. R. Tamalampudi, R. Sankar, K. M. Boopathi, A. Anand, K. Yadav, R. J. Mathew, C. R. Liu, F. C. Chou, Y. T. Chen*
Nanoscale, 2016, 8, 2284-2292. (IF-5.1) PDF
Doctoral Works
7. Ultra-thin Layered Ternary Single Crystals [Sn(SxSe1-x)2] with Bandgap Engineering for High-performance Phototransistors on Versatile Substrates.
P. Perumal, R. K. Ulaganathan, R. Sankar, Y. M. Liao, T. M. Sun, M. W. Chu, F. C. Chou, Y. T. Chen, M. H. Shih, Y. F. Chen*
Advanced Functional Material, 2016, 26, 3630-3638. (IF-19) PDF
6. Screening Limited Switching Performance of Multilayer 2D Semiconductor FETs: The Case for SnS.
S. Sucharitakul, R. K. Ulaganathan, R. Sankar, F. C. Chou, Y. T. Chen, C. Wang, C. He, R. Hef, X. P. A. Gao*
Nanoscale, 2016, 8, 19050-19057. (IF-5.1) PDF
The highly cited paper placed in the top 1%
in the field of Physics
5. Intrinsic Electron Mobility Exceeding 103 Cm2/ (V s) in Multilayer InSe FETs.
S. Sucharitakul, N. J. Goble, R. K. Ulaganathan, R. Sankar, Z. A. Bogorad, F. C. Chou, Y. T. Chen, X. P. A. Gao*
Nano Letters, 2015, 15, 3815-3819. (IF-9.1) PDF
4. Three-Dimensional Heterostructures of MoS₂ Nanosheets on Conducting MoO₂ as an Efficient Electrocatalyst to Enhance Hydrogen Evolution Reaction.
R. D. Nikam, A. Y. Lu, P. A. Sonawane, R. K. Ulaganathan, K. Yadav, L. J. Li, Y. T. Chen*
ACS Applied & Material Interfaces, 2015, 7, 23328-23335. (IF-8.2) PDF
https://doi.org/10.1021/acsami.5b07960
3. High-Performance and Bendable Few-Layered InSe Photodetectors with Broad Spectral Response.
S. R. Tamalampudi, Y. Y. Lu, R. K. Ulaganathan, R. Sankar, C. D. Liao, K. M. Boopathi, C. H. Cheng, F. C. Chou, Y. T. Chen*
Nano Letters, 2014, 14, 2800-2806. (IF-9.1) PDF
2. DNA Combing on Low-pressure Oxygen Plasma Modified Polysilsesquioxane Substrates for Single-molecule Studies.
K. K. Sriram, C. L. Chang, R. K. Ulaganathan, C. F. Chou*
Biomicrofluidics, 2014, 8, 052102. (IF-2.4) PDF
1. Advances in Nanowire Transistors for Biological Analysis and Cellular Investigation.
B. R. Li, C. C. Chen, R. K. Ulaganathan, Y. T. Chen*
Analyst, 2014, 139, 1589-1608. (IF-3.3) PDF