Recent Publications:

• Localized thermal spike driven morphology and electronic structure transformation in swift heavy ion irradiated TiO₂ nanorods; Sutapa Dey, Anusmita Chakraborty, Shashi B Mishra, Nasima Khatun, Arnab Hazra, B R K Nanda, C Sudakar, D Kabiraj, Somnath C Roy; Nanoscale Advances, 4, 241 (2022) https://doi.org/10.1039/D1NA00666E

• Ti₃C₂Tx MXene functionalization induced enhancement of photoelectrochemical performance of TiO₂ nanotube arrays; Nasima Khatun, Sutapa Dey, Govinda C. Behera, Somnath C. Roy, Materials Chemistry and Physics 278, 125651 (2022)

https://doi.org/10.1016/j.matchemphys.2021.125651

• Development of CdTe quantum dot supported ZnIn₂S₄ hierarchical microflowers for improved photocatalytic activity; R Janani, S Sumathi, B Gupta, Somnath C Roy, Shubra Singh et al Journal of Environmental Chemical Engineering 10, 107030 (2022) https://doi.org/10.1016/j.jece.2021.107030

• Space charge limited conduction in anatase and mixed-phase (anatase/rutile) single TiO₂ nanotubes Sourav K Kajli, Debdutta Ray, Somnath C Roy; Physical E: Low Dimensional Systems and Nanostructures, 136, 115030 (2022)

https://doi.org/10.1016/j.physe.2021.115030

• Multiferroic, optical and magneto-dielectric properties with enhanced magneto-impedance characteristic of KBiFe₂O_5; B Khan, M K Singh, A Kumar, A Pandey, S Dwivedi, U Kumar, Surbhi Ramawat, S Kukreti, A Dixit, Somnath C.Roy; Journal of Alloys and Compounds, 893,162225 (2022) https://doi.org/10.1016/j.jallcom.2021.162225

• Efficient UV-visible Photodetector Based on Single CuO/Cu₂O Core-shell Nanowire

Sourav K Kajli, Debdutta Ray, Somnath C Roy Journal of Alloys and Compounds, 895, 162546 (2021)

https://doi.org/10.1016/j.jallcom.2021.162546

• Enhanced H₂ evolution through water splitting using TiO₂/ultrathin g-C₃N₄: a type II heterojunction photocatalyst fabricated by in-situ thermal exfoliation

Nasima Khatun, Sutapa Dey, Tamilselvan Appadurai, Aravind K Chandiran, Somnath C Roy

Applied Physics Letters, 119 (9), (2021), https://doi.org/10.1063/5.0061923

Publications :

1. Highly efficient photoelectrochemical ZnO and TiO₂ nanorod/Sb₂S₃ heterostructured photoanodes through one step thermolysis of Sb-MPA complex

V Sharma, A C Dakshinamurthy, B Pandey, Somnath C Roy, C Sudakar

Solar Energy, 225, 333 (2021) https://doi.org/10.1016/j.solener.2021.07.045

2. Adsorption and degradation mechanism of 2,4,6-trinitrotoluene on TiO₂ (110) surface

Shashi B. Mishra, S. Marutheeswaran, Somnath C. Roy, V. Natarajan, P. K. Rai, B.R.K. Nanda

Surface Science, 713, 121902 (2021) https://doi.org/10.1016/j.susc.2021.121902

3. Anomalous diameter dependent electrical transport in individual CuO nanowire

SK Kajli, D Ray and Somnath C Roy

Journal of Physics D: Applied Physics, 54(25), 255104 (2021)

https://doi.org/10.1088/1361-6463/abeeb8

4. Influence of Ce doping on morphology, crystallinity and photoelectrochemical charge transfer characteristics of TiO₂ nanorod arrays grown on conductive glass substrate

Sutapa Dey and Somnath C Roy

Journal of Alloys and Compounds, 881, 160481 (2021)

https://doi.org/10.1016/j.jallcom.2021.160481

5. Investigation of Photo-induced enhancement of sensitivity and electro-chemical surface phenomenon of multileg TiO₂ nanotubes sensor device towards H₂O₂

P Chithra Lekha, Y Rambabu, V T Fidal Kumar, T S Chandra, Somnath C Roy

Journal of Electroanalytical Chemistry, 895, 115399, (2021)

https://doi.org/10.1016/j.jelechem.2021.115399

6. Designing TiO₂ nanostructures through hydrothermal growth: influence of process parameters and substrate position

Sutapa Dey, Somnath C Roy

Nano Express, 2, 010028 (2021) https://doi.org/10.1088/2632-959X/abe844

7. Hydrothermal temperature-controlled size and distribution of CeO₂ nanoparticles over TiO₂ nanorods: heterojunction characteristics and photoelectrochemical performance

Sutapa Dey, Somnath C Roy

Ceramics International 47 (10), 14603, (2021) https://doi.org/10.1016/j.ceramint.2021.02.043

8. Morphology dependent electrical conduction and breakdown in single TiO₂ nanotubes

SK Kajli, D Ray, Somnath C Roy

Nanoscale Advances 3 (2), 432-445 (2021) https://doi.org/10.1039/d0na00713g

9. Electronic structure of graphene/TiO₂ interface: Design and functional perspectives

SB Mishra, Somnath C Roy, BRK Nanda

Applied Surface Science 542, 148709 (2021) https://doi.org/10.1016/j.apsusc.2020.148709

10. Effect of oxygen nonstoichiometry on the photoelectrochemical performance of oxide-nanorod based TiO₂/Sb₂S₃ and ZnO/Sb₂S₃ heterostructured photoanodes

V Sharma, AC Dakshinamurthy, B Pandey, Somnath C Roy, C Sudakar

Nano Express 1 (3), 030038 (2020) https://doi.org/10.1088/2632-959X/abd2d3

11. TiO₂ Nanotube Arrays on Flexible Kapton Substrates for Photo-Electrochemical Solar Energy Conversion,

Samba S Vadla, Payel Bandyopadhyay, Subish John, Pijush Ghosh, Somnath C Roy,

ACS Applied Nano Materials 3(12) 11715-11724 (2020) https://dx.doi.org/10.1021/acsanm.0c02028

12. Template-free fabrication of BiFeO₃ nanorod arrays: multiferroic and photoelectrochemical performances

Swati Dhua, H Furono, T Homma, N Saito, Somnath C Roy

Nanotechnology, 31, 355602 (2020), https://doi.org/10.1088/1361-6528/ab9132

13. A scalable approach for functionalization of TiO₂ nanotube arrays with g-C₃N₄ for enhanced photoelectrochemical performance

Beauty Pandey, Sanju Rani, Somnath C Roy,

Journal of Alloys and Compounds, 846, 155881 (2020) https://doi.org/10.1016/j.jallcom.2020.155881

14. Mechanistic understanding of NO₂ dissociation on rutile TiO₂ (110) surface: an electronic structure study;

S Marutheeswaran, Shashi B Mishra, Somnath C Roy, B R K Nanda;

Journal of Physical Chemistry C, 124, 8786-8794 (2020) https://dx.doi.org/10.1021/acs.jpcc.0c00525

15. High Photoelectrochemical performance of reduced graphene oxide wrapped, CdS functionalized, TiO₂ multileg nanotubes;

Y Rambabu, Swati Dhua, Manu Jaiswal, Somnath C Roy

Nanotechnology 31, 275701 (2020) https://doi.org/10.1088/1361-6528/ab84a0

16. Charge transfer mediated photoluminescence enhancement in carbon dots embedded in TiO₂ nanotube matrix;

Anu B, B Pandey, Somnath C Roy, Jayeeta Bhattacharya

Carbon 161, 535-541 (2020) https://doi.org/10.1016/j.carbon.2020.01.097

17. Cu₂O/CuO nanowire/nanoflake heterojunction with the enhanced surface area for photoelectrochemical conversion of solar energy,

Subish John and Somnath C Roy,

Applied Surface Science, 509, 144703, (2020). https://doi.org/10.1016/j.apsusc.2019.144703

18. Unravelling atomically resolved structure of a high-k dielectric oxide-semiconductor interface: Exit wave reconstruction and ab-initio calculation insights.

Mahabul Islam, Piu Rajak, Satyesh Yadav, Somnath C Roy, Somnath Bhattacharyya,

Journal of Alloys and Compounds 813, 152232 (2020) https://doi.org/10.1016/j.jallcom.2019.152232

19. Direct growth of self-aligned single-crystalline GaN nanorod array on flexible Ta foil for photocatalytic solar water-splitting

P. Tyagi, C. Ramesh, J. Kaswan, S. Dhua, S. John, A.K. Shukla, Somnath C Roy, S.S. Kushvaha, S.K. Muthusamy,

Journal of Alloys and Compounds 805, 97, (2019) https://doi.org/10.1016/j.jallcom.2019.07.071.

20. High photoelectrochemical activity of CuO nanoflakes grown on Cu foil

Subish John, Samba Siva Vadla, Somnath C Roy;

Electrochimica Acta, 319, 390, (2019). https://doi.org/10.1016/j.electacta.2019.07.008

21. Photocatalytic reduction of CO₂ using graphene oxide wrapped TiO₂ nanotubes;

Y Rambabu, Umesh Kumar, Nikita Singhal, Meenal Kaushal, Manu Jaiswal, Suman Lata Jain, Somnath C Roy;

Applied Surface Science; 485, 48 (2019) https://doi.org/10.1016/j.apsusc.2019.04.041

22. Quantum-mechanical process of carbonate complex formation and large-scale anisotropy in the adsorption energy of CO₂ on anatase TiO₂ (001) surface,

Shashi B Mishra, Aditya Chaudhary, Somnath C Roy, B R K Nanda;

Physical Review Materials 2, 115801, (2018) https://doi.org/10.1103/PhysRevMaterials.2.115801

23. An improved strategy for transferring and adhering thin nanoporous alumina membrane onto conducting transparent electrodes for template assisted electrodeposition of high aspect-ratio semiconductor nanowires with increased optical absorption,

H S Bindra, A B V Kiran Kumar, Tushar Kumeria, Somnath C Roy, Ranu Nayak, Nanotechnology 30, (2019) https://doi.org/10.1088/1361-6528/aae6e4

24. Local probing of magnetoelectric coupling in BaTiO₃-Ni 1-3 composites

Samba Siva Vadla, Tommaso Costanzo, Subish John, Gabriel Caruntu, Somnath C. Roy;

Scripta Materialia 159, 33 (2019) https://doi.org/10.1016/j.scriptamat.2018.09.003

25. Chemicapacitive gas sensors based on TiO₂ and BaTiO₃ nanotube arrays;

B Manmadha Rao and Somnath C Roy,

Sensor Letters, 16, (2) (2018), https://doi.org/10.1166/sl.2018.3922

26. Controlled and selective growth of 1D and 3D CdTe nanostructures through a structurally engineered porous alumina template for enhanced optical applications;

H S Bindra, Subish John, Somnath C Roy, O P Sinha, S S Islam, Ranu Nayak

Journal of the Electrochemical Society 165 (4) H3061-H3068 (2018). https://doi.org/10.1149/2.0091804jes

27. Photo-electrochemical properties of hierarchically branched, graphene wrapped nanostructures obtained through hydrothermally transformed TiO₂ nanotubes;

Y Rambabu, Manu Jaiswal, Somnath C Roy,

Nanotechnology, 28, 405706 (2017) https://doi.org/10.1088/1361-6528/aa8355

28. Probing the charge recombination in rGO decorated TiO₂ nanotube arrays

Y. Rambabu, Manu Jaiswal, Somnath C Roy,

AIP Advances, 6, 115010, (2016) https://doi.org/10.1063/1.4967387.

29 Modified photoelectrochemical and photo-voltaic properties of solvothermally crystallised TiO₂ nanotube arrays;

B Mamnadha Rao, Mukta Tathavadekar, C. Venkatrao, Somnath C Roy;

Journal of Materials Science: Materials in Electronics, 12427-12437, (2016) https://doi.org/10.1007/s10854-016-5248-0

30. Enhanced photoelectrochemical properties of reduced graphene oxide wrapped TiO₂ multileg nanotubes

Y Rambabu, Manu Jaiswal, Somnath C Roy

Journal of the Electrochemical Society, 163 (8) H652-H656 (2016) https://doi.org/10.1149/2.0351608jes

31.Effect of annealing temperature on phase transformation, structural stability and photoelectrochemical performance of TiO₂ multileg nanotubes.

Y Rambabu, Manu Jaiswal, Somnath C Roy,

Catalysis Today. 278, 255-261 (2016) https://doi.org/10.1016/j.cattod.2016.01.016

32. Photoelectrochemical properties of reduced graphene oxide modified TiO₂ micro-whiskers.

Y Rambabu, Manu Jaiswal, Somnath C Roy,

Journal of Nanoscience and Nanotechnology, 16, 4835, (2016). https://doi.org/10.1166/jnn.2016.12072

33.Enhanced photoelectrochemical characteristics of multileg TiO₂ nanotube arrays through efficient light harvesting.

Y. Rambabu, Manu Jaiswal, Somnath C Roy,

Journal of Physics D: Applied Physics 48, 295302 (2015)

https:/doi.org/10.1088/0022-3727/48/29/295302

34. Water assisted crystallization, gas sensing and photoelectrochemical properties of electrochemically synthesized TiO₂ nanotube arrays;

B. M. Rao and Somnath C. Roy;

RSC Advances; 4, 49108, (2014). https://doi.org/10.1039/c4ra06842d

35 Anatase TiO₂ nanotube arrays with high temperature stability;

B. M. Rao and Somnath C Roy;

RSC Advances 4, 38133, (2014). https://doi.org/10.1039/c4ra05882h

36 Solvothermal processing of amorphous TiO₂ nanotube arrays: achieving crystallinity at a lower thermal budget;

B. M. Rao and Somnath C. Roy;

Journal of Physical Chemistry C, 118, 1198-1206, (2014).

https://doi.org/10.1021/jp406930y

37 Solar spectrum photocatalytic conversion of CO₂ and water vapour into hydrocarbons using TiO₂ nanoparticles membranes;

Sanju Rani, N. Z. Bao, Somnath C Roy

Applied Surface Science 289, 203-208 (2014). https://doi.org/10.1016/j.apsusc.2013.10.135

38 Theory, instrumentation and applications of magnetoelastic resonance sensors: A review;

Craig A. Grimes, Somnath C. Roy, Sanju Rani, Q. Y. Cai

Sensors 11,2809-2844 (2011). https://doi.org/ 10.3390/s110302809

39 Toward solar fuels: Photocatalytic conversion of carbon dioxide to hydrocarbons

Somnath C. Roy, Oomman K. Varghese, Maggie Paulose, and Craig A. Grimes;

ACS Nano, 4, p1259 (2010) https://doi.org/10.1021/nn9015423

40 Synthesis and applications of electrochemically self-assembled titania nanotube arrays

Sanju Rani, Somnath C. Roy, Maggie Paulose, Oomman K. Varghese, Gopal K. Mor, Sanghoon Kim, Sorachon Yoriya, Thomas J. LaTempa, C. A. Grimes;

Phys. Chem. Chem. Phys. 12, p 2780, (2010) https://doi.org/10.1039/b924125f

41 Enhancement of ammonia sensitivity in swift heavy ion irradiate nanocrystalline SnO₂ thin films,

Sanju Rani, Somnath C. Roy, N. K. Puri, M. C. Bhatnagar, D. Kanjilal

Journal of Nanomaterials, p 4 (2008) https://doi.org/10.1155/2008/395490

42 p-Type gas sensing behaviour of undoped SnO₂ thin films irradiated with a high energy ion beam

Sanju Rani, M. C. Bhatnagar, Somnath C. Roy, N. K. Puri, D. Kanjilal;

Sensors and Actuators B, 135, p 35 (2008) https://doi.org/10.1016/j.snb.2008.07.014

43 A wireless magnetoelastic biosensor for the selective detection of low-density lipoprotein (LDL) particles

X. Feng, Somnath C. Roy, G. K. Mor, C. A. Grimes;

Sensor Letters 6, p 359 (2008). https://doi.org/10.1166/sl.2008.051

44 The equation of motion, impedance, and equivalent circuit model for a magnetoelastic resonance sensor

C. S. Mungle, Somnath C. Roy, C. A. Grimes;

Sensor Letters 6, p 421 (2008). https://doi.org/10.1166/sl.2008.052

45 Effect of swift heavy ion irradiation on structure, optical, and gas sensing properties of SnO₂ thin films

Sanju Rani, N. K. Puri, Somnath C. Roy, M. C. Bhatnagar, D. Kanjilal

Nuclear Instruments and Methods in Physics Research (NIM)B, 266, p 1987 (2008)

https://doi.org/10.1016/j.nimb.2008.02.062

46 Use of magnetoelastic sensors for quantifying platelet aggregation II: Distinguishing contributions of fibrin and thrombin to the coagulation kinetics of whole blood

Somnath C. Roy, J. R. Werner, G. Mambrini, C. A. Grimes;

Sensor Letters, 6, p 285 (2008) https://doi.org/10.1166/sl.2008.035

47 Use of magnetoelastic sensors for quantifying platelet aggregation I: Whole blood and platelet rich plasma

Somnath C. Roy, J. R. Werner, D. Kouzoudis, C. A. Grimes;

Sensor Letters, 6, p 280 (2008) https://doi.org/10.1166/sl.2008.034

48 Eliminating unwanted nanobubbles from hydrophobic solid/liquid interfaces: A case study using magnetoelastic sensors

X. Feng, Somnath C. Roy, C. A. Grimes;

Langmuir, 24, p 3918 (2008) https://doi.org/10.1021/la703572z

49 Structure, ferroelectric, and gas sensing properties of sol-gel derived (Ba,Sr)(Ti,Zr)O₃ thin films

M. Kumar, S. Rani, M. C. Bhatnagar, Somnath C. Roy;

Materials Chemistry and Physics; 107, p 399 (2008)

https://doi.org/10.1016/j.matchemphys.2007.08.010

50 An analysis on the effect of sensor configuration and geometry of the magnetoelastic resonance sensors operating in air

C. S. Mungle, Somnath C. Roy, C. A. Grimes;

Sensor Letters, 6, p 137 (2008) https://doi.org/10.1166/sl.2008.025

51 The effect of TiO₂ nanotubes in the enhancement of blood clotting for the control of hemorrhage

Somnath C. Roy, Maggie Paulose, Craig A Grimes;

Biomaterials, 28, p 4667, (2007) https://doi.org/10.1016/j.biomaterials.2007.07.045

52 Quantification of blood clotting kinetics I: Determination of activated clotting times as a function of heparin concentration using magnetoelastic sensors

K. Zeng, Somnath C. Roy, C. A. Grimes;

Sensor Letters 5, p 1 (2007) https://doi.org/10.1166/sl.2007.217

53 Quantification of blood clotting kinetics II: Thromboelastograph analysis and measurement of erythrocyte sedimentation rate using magnetoelastic sensors

Somnath C. Roy, K. G. Ong, K. Zeng, C. A. Grimes;

Sensor Letters 5, p8 (2007) https://doi.org/10.1166/sl.2007.218

54 Highly sensitive SnO₂ thin film NO₂ gas sensor operating at low temperature

J. Kaur, Somnath C. Roy, M. C. Bhatnagar;

Sensors and Actuators B, 123, p 1090 (2007) https://doi.org/10.1016/j.snb.2006.11.031

55 Large blue shift in the optical band-gap of sol-gel derived BST thin films

Somnath C Roy, G. L. Sharma, M. C. Bhatnagar;

Solid State Communications141, p 243 (2007)

https://doi.org/10.1016/j.ssc.2006.11.007

56 Structure, microstructure and photoluminescence properties of Fe doped SnO₂ thin films

Sanju Rani, N. Karar, Somnath C. Roy, M. C. Bhatnagar;

Solid State Communications 141, p 214 (2007)

https://doi.org/10.1016/j.ssc.2006.10.036

57 Effect of Fe doping on the gas sensing properties of nano-crystalline SnO₂ thin films Sanju Rani, Somnath C. Roy, M. C. Bhatnagar;

Sensors and Actuators B 122, p 204 (2007)

https://doi.org/10.1016/j.snb.2006.05.032

58 Dependence of ac and dc conduction on the pre-sintering temperature in sol-gel derived Ba_0.5Sr_0.5TiO₃ thin films

Somnath C. Roy, M. C. Bhatnagar, G. L. Sharma, R. Manchanda, V. R. Balakrishnan, S. B. Samanta;

Materials Chemistry and Physics 100, p 404 (2006)

https://doi.org/10.1016/j.matchemphys.2006.01.042

59 Study of dielectric and pyroelectric properties of sol-gel derived (Ba,Sr)TiO₃ thin films

Manoj Kumar, Somnath C. Roy, S. Agarwal, G. L. Sharma, M. C. Bhatnagar;

Ferroelectrics, 329, p 33 (2005) https://doi.org/10.1080/00150190400315012

60 Novel ammonia sensing phenomena in sol-gel derived Ba_0.5Sr_0.5TiO₃ thin films

Somnath C. Roy, M. C. Bhatnagar, G. L. Sharma, S. B. Samanta;

Sensors and Actuators B,110, p 299 (2005) https://doi.org/10.1016/j.snb.2005.02.030

61 Photoluminescence study of the sol-gel derived Ba_0.5Sr_0.5TiO₃ thin films for the characterization of trap states

Somnath C. Roy, M. C. Bhatnagar, G. L. Sharma, N. Karar, Harish Chander;

Japanese Journal of Applied Physics; 44, p 34 (2005).

https://doi.org/10.1143/JJAP.44.34

62 Effect of pH on electrical and optical properties of sol-gel derived microcrystalline Ba_0.5Sr_0.5TiO₃ thin films

Somnath C. Roy, M. C. Bhatnagar, G. L. Sharma, R. Manchanda, V. R. Balakrishnan, S. B. Samanta;

Applied Surface Science, 236, p 306(2004) https://doi.org/10.1016/j.apsusc.2004.05.017

63 Effect of pre-sintering temperature on the structural and dielectric properties of sol-gel derived (Ba_0.5Sr_0.5)TiO₃ thin films

Somnath C. Roy, M. C. Bhatnagar, G. L. Sharma, R. Manchanda, V. R. Balakrishnan

Ceramics International. 30, p 2283 (2004)

https://doi.org/10.1016/j.ceramint.2004.01.008