Publications

Below, you’ll find my writing organized by publication year. For questions on any specific publication, feel free to email me, and will respond as soon as possible.

Kumar, M.K., Muthuvinayagam, M. (2023). Graphene Nanotechnology for Renewable Energy Systems. Subramaniam, R.T., Kasi, R., Bashir, S., Kumar, S.S.A. (eds) Graphene. Engineering Materials. Springer, Singapore.
https://doi.org/10.1007/978-981-99-1206-3_8.

1. M. Jeevaraj, D. Sivaganesh, S. Saravanakumar, S. Asath Bahadur, S. Sudhahar, M. Krishna Kumar, Extrinsic electronic states to tune the luminescence and bonding nature of Cs2NaInCl6 double perovskite, Materials Chemistry and Physics, 311 (2024) 128569. https://doi.org/10.1016/j.matchemphys.2023.128569.

2. G. Vignesh, G. Rajesh, S. Sudhahar, T. Theivasanthi, M. Krishna Kumar, Influence of annealing on the morphological, structural and electrochemical properties of Co3O4 spinel electrodes, Journal of Energy Storage, 73C (2023) 109115, https://doi.org/10.1016/j.est.2023.109115.

3. M. Jeevaraj, D. Sivaganesh, S. Saravanakumar, S. Asath Bahadur, S. Sudhahar,
   M. Krishna Kumar, Broadband near infrared emission in Cr3+: Cs2AgBiCl6 double perovskite halides, Optical Materials, 143 (2023) 114294. https://doi.org/10.1016/j.optmat.2023.114294.

4. G. Vignesh, P. Devendran, N. Nallamuthu, S. Sudhahar, P. Senthil Kumar, M. Krishna Kumar, Effects of nitrogen, sulphur, and temperature treatments on the spectral, structural, and electrochemical characteristics of graphene oxide for energy storage applications, Carbon Trends, 11 (2023) 100262. https://doi.org/10.1016/j.cartre.2023.100262.

5. Vignesh, G., Devendran, P., Nallamuthu, N. et al. N-rGO/NiCo2O4 nanocomposite for high performance supercapacitor applications. J Mater Sci: Mater Electron 34, 820 (2023). https://doi.org/10.1007/s10854-023-10242-y

6. Murugesan, M., Nallamuthu, N., Ranjithkumar, R. et al. Synthesis and Electrochemical Investigation of Hetero Bimetallic Complexes CoMn2O4 Micro Rods for Novel Supercapacitor Electrode, Electron. Mater. Lett. 19, 108–118 (2023). https://doi.org/10.1007/s13391-022-00380-6

7. V. Kousalya Devi, A. Venkatesan, A. Nivedhitha Bharathi, G. Parvathy, R. Kaliammal, M. Krishna Kumar, S. Sudhahar, Third Order Nonlinear Optical Properties of Bis (Creatininium 2,4-Dichlorobenzoate) Monohydrate Organic New Single Crystal, Journal of Molecular Structure, 1271 (2023) 134115, https://doi.org/10.1016/j.molstruc.2022.134115

8. Ranjithkumar, R., Lakshmanan, P., Palanisami, N. et al. Facile, Morphology-Controlled and Mass Production of 0D-Ag/2D-g-C3N4/3D-TiO2 Nano-composite Materials: Effect of Silver Morphology and Loading on the Electrochemical Performance. Electron. Mater. Lett. 19, 172–183 (2023). https://doi.org/10.1007/s13391-022-00385-1

9. M. Jeevaraj, M. Krishna Kumar, Luminescence from organometal halide hybrid – Imidazolium lead iodide, Materials Letters, 331 (2023) 133464, https://doi.org/10.1016/j.matlet.2022.133464

10. Jeevaraj, M., Devendran, P., Nallamuthu, N. et al. Influence of Mn2+ doping on the optical properties of Cs2AgBiCl6 double perovskite luminescent phosphors, J Mater Sci: Mater Electron 34, 65 (2023). https://doi.org/10.1007/s10854-022-09560-4

11. M. Jeevaraj, S. Sudhahar, N. Nallamuthu, P. Devendran, S. Saravanakumar, D. Sivaganesh, M. Krishna Kumar, Solution processed Mn2+ doped Cs2AgInCl6 lead free double perovskite as a potential light emitting material, Physica B: Condensed Matter, 653 (2023) 414679. https://doi.org/10.1016/j.physb.2023.414679

12. G. Vignesh, R. Ranjithkumar, P. Devendran, N. Nallamuthu, S. Sudhahar, M. Krishna Kumar, Nitrogen doped reduced graphene oxide/ZnCo2O4 nanocomposite electrode for hybrid supercapacitor application, Materials Science and Engineering: B, 290 (2023) 116328. https://doi.org/10.1016/j.mseb.2023.116328

13. Vignesh, G., Ranjithkumar, R., Devendran, P., Nallaperumal, N., Sudhahar, S., Kumar, M. K., Structural, Spectral, and Electrochemical Investigations of a Nitrogen‐Doped N‐rGO/MgCo2O4 Nanocomposite for Supercapacitor Applications, ChemistrySelect 2023, 8, e202203915. https://doi.org/10.1002/slct.202203915

14. Vignesh, G., Devendran, P., Nallamuthu, N. et al. N-rGO/NiCo2O4 nanocomposite for high performance supercapacitor applications. J Mater Sci: Mater Electron 34, 820 (2023). https://doi.org/10.1007/s10854-023-10242-y

15. G. Vignesh, P. Devendran, N. Nallamuthu, S. Sudhahar, P. Senthil Kumar, M. Krishna Kumar, Effects of nitrogen, sulphur, and temperature treatments on the spectral, structural, and electrochemical characteristics of graphene oxide for energy storage applications, Carbon Trends, 11 (2023) 100262. https://doi.org/10.1016/j.cartre.2023.100262

16. G. Maheshwaran, G. Seethalakshmi, V. Kousalya Devi, Lappasi Mohanram VenkataKrishna, M. Ramesh Prabhu, M. Krishna Kumar, S. Sudhahar, Synergistic effect of Cr2O3 and Co3O4 nanocomposite electrode for high performance supercapacitor applications, Current Applied Physics, 36 (2022) 63-70. https://doi.org/10.1016/j.cap.2022.01.007

17. R. Kaliammal, G. Parvathy, G. Maheshwaran, V. Kousalya Devi, M. Krishna Kumar, K. Sankaranarayanan, S. Sudhahar, Experimental and theoretical studies on new 2-amino-6-methylpyridinium 2,4-dihydroxybenzoate monohydrate organic single crystal for second order nonlinear optical applications, Journal of Molecular Structure, 1254 (2022) 132330. https://doi.org/10.1016/j.molstruc.2022.132330

18. Kaliammal, R., Parvathy, G., Ravi, G. et al. Crystal growth and characterization of 2-amino-6-methylpyridinium p-chlorobenzoate dihydrate single crystal: a novel third-order nonlinear optical material for optoelectronic applications. J Mater Sci: Mater Electron 33, 4598–4616 (2022). https://doi.org/10.1007/s10854-021-07650-3

19. M. Jeevaraj, R. Ranjithkumar, P. Devendran, N. Nallamuthu, S. Sudhahar, M. Krishna Kumar, Stoke shifted photoluminescence in Guanidinium lead halides for light emitting applications, Chemical Physics Letters, 800 (2022) 139693. https://doi.org/10.1016/j.cplett.2022.139693

20. C. Sambathkumar, N. Nallamuthu, M. Krishna Kumar, S. Sudhahar, P. Devendran, Electrochemical exploration of cobalt sulfide nanoparticles synthesis using cobalt diethyldithiocarbamate as single source precursor for hybrid supercapacitor device, Journal of Alloys and Compounds, 920 (2022) 165839. https://doi.org/10.1016/j.jallcom.2022.165839

21. Maheshwaran Girirajan, Nivedhitha Bharathi Alagarsamy, Kaliammal Ramachandran, Ramesh Prabhu Manimuthu, Devendran Pazhanivel, Krishna Kumar Muthusamy, Sudhahar Sakkarapani, Two dimensional layered bismuthene nanosheets with ultra-fast charge transfer kinetics as a superior electrode material for high performance asymmetric supercapacitor, Electrochimica Acta, 426 (2022) 140838. https://doi.org/10.1016/j.electacta.2022.140838

22. Nagavenkatesh, K.R., Sambathkumar, C., Nallamuthu, N. et al. Investigation of electrochemical behaviour and annealing effect on zinc cobaltite nanoparticles as working electrode material for energy storage device. J Mater Sci: Mater Electron 33, 22169–22182 (2022). https://doi.org/10.1007/s10854-022-08997-xice

23. Nivedhitha Bharathi, A., Maheshwaran, G., Kousalya Devi, V. et al. Enhanced electrochemical performance of bio-derived nickel oxide nanoparticles using Zephyranthes rosea flower extract and investigation on charge storage mechanism. Bull Mater Sci 45, 188 (2022). https://doi.org/10.1007/s12034-022-02773-7

24. M. Jeevaraj, S. Sudhahar, P. Devendran, N. Nallamuthu, Naidu Dhanpal Jayram, M. Krishna Kumar, Structural, optical and charge density investigations on lead free Mn2+ doped Cs2NaBiCl6 double perovskite microcrystals, Materials Today Communications, 33 (2022) 104715. https://doi.org/10.1016/j.mtcomm.2022.104715

25. S. Suganya, G. Maheshwaran, M. Ramesh Prabhu, P. Devendran, M. Krishna Kumar, S. Sudhahar, Enhanced electrochemical activity of ternary Co-Mn-Zn oxide for the fabrication of hybrid supercapacitor applications, Journal of Energy Storage, 56 (2022) 106057. https://doi.org/10.1016/j.est.2022.106057

26. G. Maheshwaran, R. Selva Muneeswari, A. Nivedhitha Bharathi, M. Krishna Kumar, S. Sudhahar, Eco-friendly synthesis of lanthanum oxide nanoparticles by Eucalyptus globulus leaf extracts for effective biomedical applications, Materials Letters, 283 (2021) 128799. https://doi.org/10.1016/j.matlet.2020.128799

27. R. Ranjithkumar, P. Lakshmanan, P. Devendran, N. Nallamuthu, S. Sudhahar, M. Krishna Kumar, Investigations on effect of graphitic carbon nitride loading on the properties and electrochemical performance of g-C3N4/TiO2 nanocomposites for energy storage device applications, Materials Science in Semiconductor Processing, 121 (2021) 105328. https://doi.org/10.1016/j.mssp.2020.105328

28. S. Sudhahar, M. Krishna Kumar, P. Pandi, R. Mohan Kumar, 2-Phenylethylammonium p-hydroxybenzoate: Growth, structural, spectral, thermal, optical and mechanical characterization, Optik, 125 (2014) 4327-4332. https://doi.org/10.1016/j.ijleo.2014.03.030

29. S. Ezhil Arasi, R. Ranjithkumar, P. Devendran, M. Krishnakumar, A. Arivarasan, Investigation on electrochemical behaviour of manganese vanadate nanopebbles as potential electrode material for supercapacitors, Journal of Alloys and Compounds, 857 (2021) 157628. https://doi.org/10.1016/j.jallcom.2020.157628

30. M. Jeevaraj, S. Sudhahar, M. Krishna Kumar, Evolution of stability enhancement in organo-metallic halide perovskite photovoltaics-a review, Materials Today Communications, 27 (2021) 102159. https://doi.org/10.1016/j.mtcomm.2021.102159

31. G. Maheshwaran, M. Malai Selvi, R. Selva Muneeswari, A. Nivedhitha Bharathi, M. Krishna Kumar, S. Sudhahar, Green synthesis of lanthanum oxide nanoparticles using Moringa oleifera leaves extract and its biological activities, Advanced Powder Technology, 32 (2021) 1963-1971. https://doi.org/10.1016/j.apt.2021.04.004

32. R Kaliammal, G Parvathy, R Mohan Kumar, M Krishna Kumar, G Vinitha, S Sudhahar, Physicochemical and quantum chemical calculations on new bis (2-amino-6-methylpyridinium 3,4–dimethoxybenzoate) dihydrate organic single crystal for third order nonlinear optical applications, Chinese Journal of Physics, 72 (2021) 100-125. https://doi.org/10.1016/j.cjph.2021.03.030

33. G. Maheshwaran, C. Selvi, R. Kaliammal, M. Ramesh Prabhu, M. Krishna Kumar, S. Sudhahar, Exploration of Cr2O3-NiO nanocomposite as a superior electrode material for supercapacitor applications, Materials Letters, 300 (2021) 130191. https://doi.org/10.1016/j.matlet.2021.130191

34. Sambathkumar, C., Manirathinam, V., Manikandan, A. et al. Solvothermal synthesis of Bi2S3 nanoparticles for active photocatalytic and energy storage device applications, J Mater Sci: Mater Electron 32 (2021) 20827–20843. https://doi.org/10.1007/s10854-021-06596-w

35. Sambathkumar, C., Ranjithkumar, R., Arasi, S.E. et al. High-performance nickel sulfide modified electrode material from single-source precursor for energy storage application. J Mater Sci: Mater Electron 32 (2021) 20058–20070. https://doi.org/10.1007/s10854-021-06383-7

36. Velsankar, K., Parvathy, G., Mohandoss, S. et al. Celosia argentea leaf extract-mediated green synthesized iron oxide nanoparticles for bio-applications. J Nanostruct Chem 12, 625–640 (2022). https://doi.org/10.1007/s40097-021-00434-5

37. S. Ezhil Arasi, R. Ranjithkumar, P. Devendran, M. Krishnakumar, A. Arivarasan, Studies on electrochemical mechanism of nanostructured cobalt vanadate electrode material for pseudocapacitors, Journal of Energy Storage, 41 (2021) 102986. https://doi.org/10.1016/j.est.2021.102986

38. R. Kaliammal, G. Parvathy, G. Maheshwaran, K. Velsankar, V. Kousalya Devi, M. Krishnakumar, S. Sudhahar, Zephyranthes candida flower extract mediated green synthesis of silver nanoparticles for biological applications, Advanced Powder Technology, 32 (2021) 4408-4419. https://doi.org/10.1016/j.apt.2021.09.045

39. G. Vignesh, R. Ranjithkumar, P. Devendran, N. Nallamuthu, P. Lakshmanan, S. Sudhahar, and M. Krishna Kumar, Investigations on Electrochemical Performance of Hausmannite Manganese Oxide Nanoparticles in KOH and Na2SO4 Electrolytes for Energy Storage Applications, Nano, 16 (2021) 2150144. https://doi.org/10.1142/S1793292021501447

40. Vignesh, G., Rajesh, G. & Kumar, M.K. Mn, Mg-doped ZrO2 nanoparticles: a photostable catalyst for enhanced mineralization and photocatalytic degradation of MV and MB dyes under sunlight irradiation. J Mater Sci: Mater Electron 32, 27044–27059 (2021). https://doi.org/10.1007/s10854-021-07076-x

41. C. Sambathkumar, M. Krishna Kumar, N. Nallamuthu, K. Rajesh, P. Devendran, Investigations on electrochemical performances of Co(OH)2, Fe2O3 and Mn3O4 nanoparticles covered carbon micro spheres for supercapacitor application, Inorganic Chemistry Communications, 134 (2021) 109057. https://doi.org/10.1016/j.inoche.2021.109057

42. R. Ranjithkumar, S. Ezhil Arasi, N. Nallamuthu, P. Devendran, P. Lakshmanan, A. Arivarasan, M. Krishna Kumar, Investigation and fabrication of asymmetrical supercapacitor using nanostructured Mn3O4 immobilized carbon nanotube composite, Superlattices and Microstructures, 138 (2020) 106380. https://doi.org/10.1016/j.spmi.2019.106380

43. G. Maheshwaran, K. Velsankar, G. Parvathy, R. Kaliammal, M. Krishna Kumar, S. Sudhahar, Effective growth and characterization of piperazinium orthophthalate single crystal yielding high second harmonic generation efficiency, Chinese Journal of Physics, 64 (2020) 65-78. https://doi.org/10.1016/j.cjph.2020.01.005

44. G. Parvathy, R. Kaliammal, K. Sankaranarayanan, M. Arivanandhan, M. Krishna Kumar, S. Sudhahar, Growth, experimental and theoretical investigations on 4-hydroxy-3-methoxybenzaldehyde 5-chloro-2-hydroxybenzoic acid: A new high second order nonlinear optical material, Journal of Molecular Structure, 1217 (2020) 128406. https://doi.org/10.1016/j.molstruc.2020.128406

45. G. Maheshwaran, A. Nivedhitha Bharathi, M. Malai Selvi, M. Krishna Kumar, R. Mohan Kumar, S. Sudhahar, Green synthesis of Silver oxide nanoparticles using Zephyranthes Rosea flower extract and evaluation of biological activities, Journal of Environmental Chemical Engineering, 8 (2020) 104137. https://doi.org/10.1016/j.jece.2020.104137

46. EzhilArasi, S., Ranjithkumar, R., Devendran, P. et al. Enhanced electrochemical performance of copper vanadate nanorods as an electrode material for pseudocapacitor application, J Mater Sci: Mater Electron 31 (2020) 7012–7021. https://doi.org/10.1007/s10854-020-03267-0

47. G. Parvathy, R. Kaliammal, K. Velsankar, M. Krishna Kumar, K. Sankaranarayanan, S. Sudhahar, Studies on structural, optical, homo-lumo and mechanical properties of piperazinium p-hydroxybenzoate monohydrate single crystal for nonlinear optical applications, Chemical Physics Letters, 758 (2020) 137934. https://doi.org/10.1016/j.cplett.2020.137934

48. S. Ezhil Arasi, R. Ranjithkumar, P. Devendran, M. Krishnakumar, A. Arivarasan, Electrochemical evaluation of binary Ni2V2O7 nanorods as pseudocapacitor electrode material, Ceramics International, 46 (2020) 22709-22717. https://doi.org/10.1016/j.ceramint.2020.06.034

49. Velsankar, K., Vinothini, V., Sudhahar, S. et al. Green Synthesis of CuO nanoparticles via Plectranthus amboinicus leaves extract with its characterization on structural, morphological, and biological properties, Appl Nanosci 10, 3953–3971 (2020). https://doi.org/10.1007/s13204-020-01504-w

50. Parvathy, G., Kaliammal, R., Maheshwaran, G. et al. Experimental and theoretical studies on 4-hydroxy-3-methoxybenzaldehyde nicotinamide organic co-crystal for third harmonic nonlinear optical applications, J Mater Sci: Mater Electron 31, 18937–18953 (2020). https://doi.org/10.1007/s10854-020-04431-2

51. R. Ranjithkumar, S. Ezhil Arasi, P. Devendran, N. Nallamuthu, A. Arivarasan, P. Lakshmanan, S. Sudhahar, M. Krishna Kumar, Investigations on structural, morphological and electrochemical properties of Co(OH)2 nanosheets embedded carbon nanotubes for supercapacitor applications, Diamond and Related Materials, 110 (2020) 108120. https://doi.org/10.1016/j.diamond.2020.108120

52. R. Ranjithkumar, S. Ezhil Arasi, P. Devendran, N. Nallamuthu, P. Lakshmanan, S. Sudhahar, A. Arivarasan, M. Krishna Kumar, Investigations and fabrication of Ni(OH)2 encapsulated carbon nanotubes nanocomposites based asymmetrical hybrid electrochemical supercapacitor, Journal of Energy Storage, 32 (2020) 101934. https://doi.org/10.1016/j.est.2020.101934

53. R. Ranjithkumar, S. Ezhil Arasi, S. Sudhahar, N. Nallamuthu, P. Devendran, P. Lakshmanan, M. Krishna Kumar, Enhanced electrochemical studies of ZnO/CNT nanocomposite for supercapacitor devices, Physica B: Condensed Matter, 568 (2019) 51-59. https://doi.org/10.1016/j.physb.2019.05.025

54. Velsankar K., Sudhahar S., Maheshwaran G., Krishna Kumar M., Effect of biosynthesis of ZnO nanoparticles via Cucurbita seed extract on Culex tritaeniorhynchus mosquito larvae with its biological applications, Journal of Photochemistry and Photobiology B: Biology, 200 (2019) 111650. https://doi.org/10.1016/j.jphotobiol.2019.111650

55. N. Swarna Sowmya, S. Sampathkrishnan, S. Sudhahar, M. Krishna Kumar, R. Mohan Kumar, Synthesis, growth, structural, optical, thermal, dielectric and mechanical studies of piperidinium p-nitrophenolate single crystals, Optik, 127 (2016) 3024-3029. https://doi.org/10.1016/j.ijleo.2015.12.065

56. I. Md. Zahid, S. Kalaiyarasi, M. Krishna Kumar, T. Ganesh, V. Jaisankar R. Mohan Kumar, Investigation on growth, optical and thermal properties of stilbazolium derivative crystal:4-N,N-dimethylamino-4′-N′-methylstilbazolium 2,4-dimethylbenzenesulfonate, Materials Science-Poland, 34 (2016) 811-818. https://doi.org/10.1515/msp-2016-0113

57.  Devendran, P.; Alagesan, T.; Manikandan, A.; Asath Bahadur, S.; Krishna Kumar, M.; Rathinavel, S.; Pandian, K, Sonochemical Synthesis of Bi2S3 Nanowires Using Single Source Precursor and Their Electrochemical Activity, Nanoscience and Nanotechnology Letters, 8 (2016) 478-483. https://doi.org/10.1166/nnl.2016.2111

58. A. Silambarasan, M. Krishna Kumar, A. Thirunavukkarasu, R. Mohan Kumar, P.R. Umarani, Synthesis, crystal growth, solubility, structural, optical, dielectric and microhardness studies of Benzotriazole-4-hydroxybenzoic acid single crystals, Journal of Crystal Growth, 420 (2015) 11-16. https://doi.org/10.1016/j.jcrysgro.2015.03.033

59. A. Silambarasan, M. Krishna Kumar, A. Thirunavukkarasu, R. Mohan Kumar, P.R. Umarani, Studies on the growth, structural, spectral and third-order nonlinear optical properties of Ammonium 3-carboxy-4-hydroxy benzenesulfonate monohydrate single crystal, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 135 (2015) 39-45. https://doi.org/10.1016/j.saa.2014.07.002

60. A. Silambarasan, M. Krishna Kumar, A. Thirunavukkarasu, I. Md Zahid, R. Mohan Kumar, P.R. Umarani, Studies on the growth, spectral, structural, electrical, optical and mechanical properties of Uronium 3-carboxy-4-hydroxybenzenesulfonate single crystal for third-order nonlinear optical applications, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 142 (2015) 101-109. https://doi.org/10.1016/j.saa.2015.01.093

61. Sivakumar PK, Kumar MK, Kumar RM, Chakkaravarthi G, Kanagadurai R. Crystal structure of 4-bromo-anilinium 4-methyl-benzene-sulfonate, Acta Crystallogr E Crystallogr Commun. (2015) E71, o163-o164. https://doi.org/10.1107/S2056989015002686

62. M. K. Kumar, P. Pandi, S. Sudhahar, G. Chakkaravarthi and R. M. Kumar, Crystal structure of 4-aminobenzoic acid–4-methylpyridine (1/1), Acta Cryst. (2015) E71, o125-o126, https://doi.org/10.1107/S2056989015000791

63. Siva Kumar P.K, Krishna Kumar M, Mohan Kumar R, Kanagadurai S.R, Investigation On The Crystal Structure, Third-Order Nonlinear Optical And Thermal Studies Of 4-Nitroanilinium 5-Sulfosalicylic Acid Monohydrate Single Crystal, Photon.Lett.PL, 7 (2015) 106–108. https://doi.org/10.4302/photon.%20lett.%20pl.v7i4.602

64. S. Sudhahar, M. Krishna Kumar, B.M. Sornamurthy, R. Mohan Kumar, Synthesis, crystal growth, structural, thermal, optical and mechanical properties of solution grown 4-methylpyridinium 4-hydroxybenzoate single crystal, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 118 (2014) 929-937. https://doi.org/10.1016/j.saa.2013.09.072

65. M. Krishna Kumar, S. Sudhahar, G. Bhagavannarayana, R. Mohan Kumar, Crystal growth, spectral, structural and optical studies of π-conjugated stilbazolium crystal: 4-Bromobenzaldehyde-4′-N′-methylstilbazolium tosylate, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 125 (2014) 79-89. https://doi.org/10.1016/j.saa.2014.01.029

66. S. Sudhahar, M. Krishna Kumar, P. Pandi, R. Mohan Kumar, 2-Phenylethylammonium p-hydroxybenzoate: Growth, structural, spectral, thermal, optical and mechanical characterization, Optik, 125 (2014) 4327-4332. https://doi.org/10.1016/j.ijleo.2014.03.030

67. M. Krishna Kumar, S. Sudhahar, P. Pandi, G. Bhagavannarayana, R. Mohan Kumar, Studies of the structural and third-order nonlinear optical properties of solution grown 4-hydroxy-3-methoxy-4′-N′-methylstilbazolium tosylate monohydrate crystals, Optical Materials, 36 (2014) 988-995. https://doi.org/10.1016/j.optmat.2014.01.007

68. S. Sudhahar, M. Krishna Kumar, V. Jayaramakrishnan, R. Muralidharan, R. Mohan Kumar, Effect of Sm+ Rare Earth Ion on the Structural, Thermal, Mechanical and Optical Properties of Potassium Hydrogen Phthalate Single Crystals, Journal of Materials Science & Technology, 30 (2014) 13-18. https://doi.org/10.1016/j.jmst.2013.08.017

69. M. Krishna Kumar, S. Sudhahar, G. Bhagavannarayana, R. Mohan Kumar, Crystal growth, structural and optical properties of an organic ion-complex crystal: 4-N,N-dimethylamino-4′-N′-methylstilbazolium iodide, Optik 125 (2014) 5641-5646. https://doi.org/10.1016/j.ijleo.2014.05.046

70. M. Krishna Kumar, S. Sudhahar, G. Bhagavannarayana, R. Mohan Kumar, Crystal growth, spectral, structural and optical studies of π-conjugated stilbazolium crystal: 4-Bromobenzaldehyde-4′-N′-methylstilbazolium tosylate, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 125 (2014) 79-89.  https://doi.org/10.1016/j.saa.2014.01.029

71. M. Krishna Kumar, S. Sudhahar, A. Silambarasan, B.M. Sornamurthy, R. Mohan Kumar, Crystal growth, structural, linear and nonlinear optical studies of 4-methyl-4′-N’-methylstilbazolium tosylate single crystals, Optik, 125 (2014) 751-755. https://doi.org/10.1016/j.ijleo.2013.07.040

72. P.K. Siva Kumar, M. Krishna Kumar, R. Mohan Kumar, S.R. Kanagadurai, Studies on the Growth, Spectral, Optical and Thermal Properties of 4-Nitroaniline Picrate Single Crystals, Modern Physics Letters B, 27 (2013) 1350235. https://doi.org/10.1142/S0217984913502357

73. S. Sudhahar, M. Krishna Kumar, A. Silambarasan, R. Muralidharan, and R. Mohan Kumar, Studies on structural, spectral, and optical properties of organic nonlinear optical single crystal: 2-amino-4, 6-dimethylpyrimidinium p-hydroxybenzoate, Journal of Materials, (2013) 539312. https://doi.org/10.1155/2013/539312

74. S. Sudhahar, M. Krishnakumar, B. M. Sornamurthy, G. Chakkaravarthi and R. Mohankumar, 2-Phenylethanaminium 4-hydroxybenzoate, Acta Cryst. (2013). E69, o792. https://doi.org/10.1107/S1600536813010787

75. P. K. Sivakumar, M. K. Kumar, G. Chakkaravarthi, R. M. Kumar and R. Kanagadurai, 4-Nitroanilinium 3-carboxy-4-hydroxybenzenesulfonate monohydrate, Acta Cryst. (2013). E69, o1609. https://doi.org/10.1107/S1600536813026779

76. A. Silambarasan, M. K. Kumar, G. Chakkaravarthi, R. M. Kumar and P. R. Umarani, Uronium 3-carboxy-4-hydroxybenzenesulfonate, Acta Cryst. (2013). E69, o1725. https://doi.org/10.1107/S1600536813029474

77. A. Silambarasan, M. Krishna Kumar, S. Sudhahar, A. Thirunavukkarasu, R. Mohan Kumar, P. R. Umarani, Synthesis, Crystal Growth and Characterization of bis Dl-Valine Picrate Single Crystal for Second-Order Nonlinear Optical Applications, Journal of Molecular and Engineering Materials, 01 (2013) 1350004. https://doi.org/10.1142/S2251237313500044

78. M. K. Kumar, S. M. Margret, G. Chakkaravarthi, D. Velmurugan and R. M. Kumar, 4-[2-(4-Butoxyphenyl) ethenyl]-1-methylpyridinium tosylate, Acta Cryst. (2013). E69, o709. https://doi.org/10.1107/S1600536813009616

79. S. Sudhahar, M. Krishnakumar, B. M. Sornamurthy, G. Chakkaravarthi and R. Mohankumar, 4-Methylpyridinium 4-hydroxybenzoate, Acta Cryst. (2013). E69, o279. https://doi.org/10.1107/S1600536813001785

80. M. K. Kumar, S. Sudhahar, B. M. Sornamurthy, G. Chakkaravarthi and R. M. Kumar, 4-(4-Bromostyryl)-1-methylpyridinium tosylate, Acta Cryst. (2013). E69, o694. https://doi.org/10.1107/S1600536813009227

81. P. Pandi, G. Peramaiyan, M. Krishna Kumar, R. Mohan Kumar, R. Jayavel, Synthesis, structural, optical and thermal studies of an organic nonlinear optical 4-aminopyridinium maleate single crystal, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 88 (2012) 77-81. https://doi.org/10.1016/j.saa.2011.11.060

82. M. Krishnakumar, S. Sudhahar, A. Silambarasan, G. Chakkaravarthi and R. Mohankumar, 1-Methyl-4-(4-methylstyryl) pyridinium 4-methylbenzenesulfonate, Acta Cryst. (2012). E68, o3268. https://doi.org/10.1107/S1600536812044509

83. P. K. Sivakumar, M. Krishnakumar, R. Kanagadurai, G. Chakkaravarthi and R. Mohankumar, 4-Nitroanilinium p-toluenesulfonate, Acta Cryst. (2012). E68, o3059. https://doi.org/10.1107/S1600536812040664

1. M. Krishna Kumar; S. Sudhahar; R. Mohan Kumar, Investigation on spectral, thermal and dielectric properties of DAST derivative crystal, AIP Conference Proceedings 1536, (2013) 903–904. https://doi.org/10.1063/1.4810521

2. A. Venkatesan; N. Krishna Chandar; M. Krishna Kumar; S. Arjunan; R. Mohan Kumar; R. Jayavel, Al3+ doped V2O5 nanostructure: Synthesis and structural, morphological and optical characterization, AIP Conference Proceedings 1512, 392–393 (2013). https://doi.org/10.1063/1.4791076

3. S. Sudhahar; I. MD Zahid; M. Krishna Kumar; R. Mohan Kumar, Crystalline perfection, birefringence and laser damage threshold properties of piperidinium p-hydroxybenzoate, AIP Conference Proceedings 1665 (2015) 100011. https://doi.org/10.1063/1.4918039

4. Sudhahar, S., M. Krishna Kumar, and R. Mohan Kumar, Investigation on Rare Earth Doped Nonlinear Optical Potassium Hydrogen Phthalate (KHP) Single Crystals, Advanced Materials Research. Trans Tech Publications, Ltd., October 2012. https://doi.org/10.4028/www.scientific.net/amr.584.56

5. M. Krishna Kumar; S. Sudhahar; R. Mohan Kumar, Growth and electrical properties on NLO crystal: 4-N, N-dimethylamino 4′-N′-methylstilbazolium iodide, AIP Conference Proceedings 1591 (2014) 1203–1205 (2014). https://doi.org/10.1063/1.4872903