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Functional Materials Research Laboratory (FMRL)

“Designing multifunctional materials for an efficient optical, electrical, magnetic, energy storage, photovoltaic and biological applications”

Functional Materials Research Laboratory (FMRL) was established in June 2021 at Sri Sairam Engineering College, Chennai to promote innovation and to build up Functional Materials. Functional materials are a group of engineered and advanced materials such as Molecular crystals, Semiconductors, Polymers and Nanomaterials that are synthesized and designed for some unique function with tailor-made properties. The research on their characterization will give significant contribution for future technologies.

Therefore our research work mainly focuses on the Crystal growth, Nanomaterials, Thermoelectric, Photovoltaics, Ceramics, Polymers, Optical materials, Magnetic materials, Mechanical shock wave treatment and Biomaterials.

The FMRL centre gains more consideration due to its diverse field of research with large volume of publications in functional materials. The Prime Goal of FMRL is to develop unique materials for various optical, electronic and magnetic devices.

About the Centre Head

Name : Dr. N. Sivakumar

Email : sivakumar.phy@sairam.edu.in

Ph.D :

University of Madras

Research Area :

Dr. N. Sivakumar is an Assistant Professor and head of Functional Materials Research Laboratory, Sri Sai Ram Engineering College. He has completed UG degree from Aringar Anna Govt. Arts College, Villupuram (Thiruvalluvar University) in the academic year 2004-2007 with University Rank. He has received class topper award for PG degree from Presidency College (University of Madras) in May, 2009. He started his research in crystal growth in 2011 and has successfully completed Ph.D degree in November 2015.

He has 14 years of experience in research and has published about 50 research papers in the reputed peer reviewed Journals. He has presented his research outcome in many national and international conferences and attended many scientific events like seminars and workshops. His research publication reveals his expertise in growth of 2D single crystals. He has wide knowledge in growing crystals by many growth techniques like slow cooling, unidirectional growth and melt growth methods.

At present he is focusing on developing functional materials for various applications including Supercapacitors, solar cells and laser devices. He has 14 years of experience in teaching as a Guest lecturer as well as Assistant Professor in the department of Physics. During his teaching tenure, he has co-ordinated events like guest lecturers, project expo and conferences. His academic and research work will sound his knowledge in both the fields.

Dr. N. Sivakumar has received Dr. R. Gopalakrishnan National Award for Best thesis in crystal growth from Indian Association for Crystal Growth in the year 2018, during the National Seminar on Crystal Growth held at Sacred Heart College, Tirupattur, Tamil Nadu. He has completed Postdoctoral Research work during the year 2017-2020 awarded by University Grants Commission (Dr. S. Kothari Postdoctoral Fellow), Government of India. He has also received a research grant from Department of Science and Technology (DST-TARE) in 2021 and collaborating with various international institutions such as King Sadu University (Saudi Arabia), National Institute for Materials Science (NIMS, Japan) and Institute of Low Temperature and Structure Research, Polish Academy of Sciences (Poland). He is a life member of Indian Association for Crystal Growth (IACG), Indian Association of Physics Teachers (IAPT) and member of Institute of Electrical and Electronics Engineers (IEEE).

Research

Research Projects: Currently we have two ongoing funded research projects and applied for more grants in some funding agencies to support the doctoral students.

Sl.NoTitle of the projectPositionFunding AgencyDurationStatus
1Development of novel 2D organic-inorganic hybrid halide perovskite materials for efficientPhotovoltaic applicationsPrincipal InvestigatorDST-TARE, Delhi.(Rs. 18,30,000/-)3 Years(Dec.2021-Nov. 2024)Ongoing
2Researchers Supporting Project (RSP-2021/78)Principal InvestigatorKing Saud University(Rs. 50,000/-)Long term(From June, 2021)Ongoing
3Investigation of novel ABC ternary polycrystalline materials for microwave dielectric applicationsPrincipal InvestigatorUGC DAE CSR (Rs. 1,35,000/-)3 Years
(April. 2022-March. 2025)
Ongoing

Patents : Discovery of novel materials, Innovative research experiments and their potential applications studied at the FMRL centre are highly protected through national and international level patents.

  1. Dr. N. Sivakumar, Growth Process of Melaminium Levulinate Monohydrate Crystal, Patent filed on 26-11-2021 (Application Number: 202141048795)

 

Publications : Peer reviewed Scopus/SCI indexed international publications of our centre has certified our position on the worldwide.

[1]. N. Sivakumar, J. Venkatamuthukumar, Magesh Murugesan, Ali Alsalme, Crystal structure, spectroscopic, crystalline perfection and optical studies of a potential optical material: Bis-glycine hydrobromide, Opt. Mater. 122 (2021) 111730. doi.org/10.1016/j.optmat.2021.111730, Citation: 0, I.F. 3.08, ISSN: 0957-4522 (Q2)

[2]. N. Sivakumar, J. Venkatamuthukumar, Ali Alsalme, Growth, structural, spectroscopic, optical, and mechanical studies of potassium hydrogen phthalate single crystals with glycine as additive, J Mater Sci: Mater Electron. 32, (2021) 18978–18993. doi.org/10.1007/s10854-021-06413-4, Citation: 0, I.F. 2.220, ISSN: 0957-4522 (Q2)

[3]. N. Sivakumar, P. Nagaraju, A. Alsalme, A. Alghamdi, R. Jayavel, Enhanced electrochemical performance of lanthanum ferrite decorated reduced graphene oxide nanocomposite electrodes prepared by in-situ microwave irradiation for energy storage applications, Int J Energy Res. 45 (2021) 5272-5282. doi.org/10.1002/er.6146, Citation: 0, I.F. 3.74, ISSN: 1099-114X. (Q1)

[4]. N. Sivakumar, J. Gajendiran, Ali Alsalme, Kentaro Tashiro, Structural, morphological, optical, magnetic and electrochemical behavior of solid state synthesized pure and Sr-doped LaFeO3 nanoparticles, Physica B 641 (2022) 414086. doi.org/10.1016/j.physb.2022.414086, Citation:0, I.F. 2.988, ISSN: 0921-4526 (Q3)

[5]. J. Venkatamuthukumar, Ali Alsalme, A. Jagadesan, A. Rajendira Prasad, N. Sivakumar, Dielectric studies of pure and ferric (Fe3+) ion doped potassium hydrogen phthalate single crystals for potential device performances, AIP Conference Proceedings 2464, 030005 (2022) 1-5. doi.org/10.1063/5.0082411, Citation:0, I.F. 0.4801, ISSN: 0094-243X

[6]. J. Gajendiran , S. Gnanam, V.P. Senthil, J. Ramana Ramya, K. Ramachandran,
V. Vijayakumar, S. Gokul Raj, G. Ramesh Kumar, N. Sivakumar, Hydrothermal synthesis of undoped and inner transition metals (neodymium (Nd), gadolinium (Gd)) doped tin monosulfide (SnS) nanostructures: Comparative study of the morphological, opto-magnetic
properties and antibacterial performance, Chemical Physics Letters, 796 (2022) 139569. doi.org/10.1016/j.cplett.2022.139569, Citation: 0, I.F. 2.328, ISSN: 0009-2614 (Q3)

[7]. N. Sivakumar, G. Anbalagan, R. Jayavel, Reply to the comments on the paper: Crystal design, thermal and dielectric behavior of novel silver (Ag) co-ordinated thiourea single crystals, Mater. Lett. 280 (2020) 128674. doi.org/10.1016/j.matlet.2020.128674 Citation: 0, I.F. 3.019, ISSN: 0167-577X (Q2)

[8]. A. Jagadesan, N. Sivakumar, S. Arjunan, G. Parthipan, Growth, structural, optical, thermal and dielectric behaviour of a novel organic nonlinear optical (NLO) material: Benzimidazolium trichloroacetate monohydrate, Optical Materials, 109 (2020) 110285. doi.org/10.1016/j.optmat.2020.110285, Citation: 1, I.F. 2.779, ISSN: 0925-3467 (Q2)

[9]. N. Sivakumar, J. Kanchanadevi, M. Govindarajan, R. Jayavel, G. Anbalagan, Theoretical investigation on the crystal structure, spectral and optical properties of a novel organic optical material: (Acetoxy) (2-methylphenyl) methylacetate, Journal of Molecular Structure, 1219 (2020) 128579. doi.org/10.1016/j.molstruc.2020.128579. Citation:1, I.F. 2.120, ISSN: 0022-2860 (Q3)

[10]. J. Venkatamuthukumar, N. Sivakumar, R. Jayavel, G. Anbalagan, Synthesis, structure and spectroscopic investigations of a metal-organic crystal: Thiourea silver nitrate for optical devices, AIP Conference Proceedings 2265, 030410 (2020) 1-4. doi.org/10.1063/5.0017262, Citation:0, I.F. 0.4801, ISSN: 0094-243X

[11]. J. Gajendirana, V.P. Senthil, J. Ramana ramya, N. Sivakumar, T. Shanmugavel, S. Gokul raj, G. Ramesh kumar, The influence of temperature on the structural, morphological, optical, electrical, hemocompatibility and magnetic characterization of CoFe2O4 nanostructures, J. Optoelectron. Adv. Mater. 22 (2020) 286 – 297. Citation:0, I.F. 0.588, ISSN: 1454 – 4164 (Q4)

[12]. J. Gajendiran, S. Gnanam, V. Vijaya Kumar, K. Ramachandran, J. Ramana Ramya, S. Gokul Raj, N. Sivakumar, Structural, optical and photocatalytic properties of ZnS spherical/flake nanostructures by sugar-assisted hydrothermal process, Chemical Physics Letters 754 (2020) 137639. doi.org/10.1016/j.cplett.2020.137639. Citation:2, I.F. 1.901, ISSN: 0009-2614 (Q3)

[13]. N. Sivakumar, G. Anbalagan, R. Jayavel, Crystal design, thermal and dielectric behavior of novel silver (Ag) co-ordinated thiourea single crystals, Mater. Lett. 272 (2020) 127899. doi.org/10.1016/j.matlet.2020.127899. Citation:4, I.F. 3.019, ISSN: 0167-577X (Q2)

[14]. N. Sivakumar, J. Gajendiran, R. Jayavel, Microstructural, optical, electrochemical and magnetic properties of hydrothermal synthesized zincite/carbon (ZnO/C) composite, Chem. Phys. Lett. 745, (2020) 137262. doi.org/10.1016/j.cplett.2020.137262. Citation:1, I.F. 1.901, ISSN: 0009-2614 (Q3)

[15]. K. Krishnaraj, N. Sivakumar, P. Praveen Kumar, Growth, spectral, mechanical, electrical and optical characterization of guanidinium hydrogen succinate single crystal, Bull. Mater. Sci. 43 (2020) 1-7. doi.org/10.1007/s12034-019-2019-6. Citation:2, I.F. 1.260, ISSN0250-4707 (Q4)

[16]. J. Gajendiran, N. Sivakumar, C. Parthasaradhi Reddya, J. Ramana Ramya, The effect of calcination’s temperature on the structural, morphological, optical behaviour, hemocompatibility and antibacterial activity of nanocrystalline Co3O4 powders, Ceramics International, 46 (2020) 5469-5476. doi.org. 10.1016/j.ceramint.2019.10.261. Citation:3, I.F. 3.450. ISSN: 0272-8842 (Q1)

[17]. M. Manonmani, V.P. Senthil, J. Gajendiran, J.R. Ramya, N. Sivakumar, V. Jaikumar, S. Gokul Raj, G. Ramesh Kumar, A study of the structural, magnetic, hemocompatibility and electrochemical properties of BiFeO3 (BFO)/CoFe2O4− (CFO) nanocomposite, J. Mater. Sci. Mater. Electron. 30 (2019) 10934–10943. doi:10.1007/s10854-019-01437-3. Citation:2, I.F. 2.198, ISSN0957-4522 (Q2)

[18] A. Jagadesan, N. Sivakumar, R. Mohan Kumar, G. Chakkaravarthi, S. Arjunan, Synthesis, crystal structure, growth and characterization of an optical organic material: 4-Aminopyridinium Trichloro acetate single crystal, Opt. Mater. (Amst). 84, (2018) 864–869. doi:10.1016/j.optmat.2018.08.025. Citation:9,  I.F. 2.687, ISSN: 0925-3467 (Q2)

[19]. N. Sivakumar, R. Jayavel, G. Anbalagan, R.R. Yadav, Synthesis, growth, spectral, electrical, mechanical and thermal characterization of a potential optical material: γ-glycine single crystal, Opt. Mater. (Amst). 80, (2018) 177-185. doi:10.1016/j.optmat.2018.04.051. Citation:5, I.F. 2.687, ISSN: 0925-3467 (Q2)

[20]. N. Sivakumar, R. Jayavel, G. Anbalagan, N. Kanagathara, M. Drozd, M.K. Marchewka, The theoretical and experimental vibrational studies of thiourea and silver nitrate (2:1) complex, Spectrochim. Acta Part A Mol. Biomol. Spectrosc. 204 (2018) 717–725. doi:10.1016/j.saa.2018.06.035. Citation:3, I.F. 2.931, ISSN: 1386-1425. (Q1)

[21]. R. Dhanjayan, N. Sivakumar, S. Gunasekaran, S. Srinivasan, Synthesis, crystal structure, optical and thermal studies of a potential novel organic material: L-Histidine-2-fluoro-4-nitrophenolate 2-fluoro-4-nitrophenol single crystal, Mater. Lett. 196 (2017) 74-77. doi:10.1016/j.matlet.2017.03.010. Citation:3, I.F. 3.019, ISSN: 0167-577X (Q2)

[22]. N.K. Geetha, N. SivaKumar, P. Sekar, Assessment of optimal combination of operating parameters using graph theory matrix approach, Indian J. Sci. Technol. 9 , (2016) 1-7. doi:10.17485/ijst/2016/v9i36/100851. Citation:3, I.F. 0.8, ISSN : 0974-6846.

[23] N. Sivakumar, N.K. Geetha, J. Venkatamuthukumar, V. Jayakumar, Mechanical studies on pure and Fe3+ doped potassium hydrogen phthalate single crystals for device fabrications, Indian J. Sci. Technol. 9 (2016) 1-9. doi:10.17485/ijst/2016/v9i36/100852. Citation:0, I.F. 0.8, ISSN : 0974-6846.

[24] N. Sivakumar, G. Anbalagan, Third order optical non-linear (Z-scan), birefringence, photoluminescence, mechanical and etching studies on melaminium levulinate monohydrate (MLM) single crystal for optical device applications, Opt. Mater. (Amst). 60 (2016) 533-540. doi:10.1016/j.optmat.2016.09.010. Citation:19, I.F. 2.238, ISSN : 0925-3467 (Q2)

[25] N. Sivakumar, N. Kanagathara, G. Bhagavannarayana, S. Kalainathan, G. Anbalagan, Growth, crystalline perfection, optical, thermal, laser damage threshold and electrical characterization of melaminium levulinate monohydrate single crystal, J. Cryst. Growth. 426 (2015) 86-94. doi:10.1016/j.jcrysgro.2015.05.025. Citation:9, I.F. 1.573, ISSN : 0022-0248 (Q3)

[26] N. Sivakumar, V. Jaisankar, G. Chakkaravarthi, G. Anbalagan, Synthesis, crystal structure, optical, thermal and mechanical characterization of poly bis(thiourea) silver(I) nitrate single crystals synthesized at room temperature, Mater. Lett. 132 (2014) 298-301. doi:10.1016/j.matlet.2014.06.079. Citation:9, I.F. 2.489, ISSN : 0167-577X (Q2)

[27] N. Sivakumar, S. Muralidharan, G. Chakkaravarthi, D. Velmurugan, G. Anbalagan, Crystal structure of bis[4-(dimethylamino)pyridinium] bis(2-nitrobenzoate) trihydrate, Acta Crystallogr. Sect. E Struct. Reports Online. 70 (2014) 221-223. doi:10.1107/S1600536814020583. Citation:3, I.F. 0.5, ISSN: 2056-9890 (Q4)

[28] N. Sivakumar, V. Jayaramakrishnan, K. Baskar, G. Anbalagan, Synthesis, growth and characterization of γ-glycine – A promising material for optical applications, Opt. Mater. (Amst). 37 (2014) 780-787. doi:10.1016/j.optmat.2014.09.007. Citation:14, I.F. 2.238, ISSN : 0925-3467 (Q2)

[29] K. Gayathri, P. Krishnan, N. Sivakumar, S. Kalainathan, G. Bhagavannarayana, G. Anbalagan, Growth, crystal perfection, optical and electrical properties of organic crystal: Brucinium 5-sulfosalicylate trihydrate, Optik (Stuttg). 125 (2014) 6881-6886. doi:10.1016/j.ijleo.2014.08.110. Citation:5, I.F. 1.914, ISSN : 0030-4026. (Q2)

[30]. V. Sangeetha, K. Gayathri, P. Krishnan, N. Sivakumar, N. Kanagathara, G. Anbalagan, Growth, structural, crystallisation, thermal decomposition and dielectric behaviour of melaminium bis(hydrogen oxalate) single crystal, J. Therm. Anal. Calorim. 117 (2014) 307-318. doi:10.1007/s10973-014-3723-5. Citation:8, I.F.2.042, ISSN : 1388-6150 (Q3)

[31] N. Sivakumar, J. Srividya, J. Mohana, G. Anbalagan, Growth, crystalline perfection, spectral and optical characterization of a novel optical material: l-tryptophan p-nitrophenol trisolvate single crystal, Spectrochim. Acta – Part A Mol. Biomol. Spectrosc. 139 (2015) 156-164. doi:10.1016/j.saa.2014.12.044. Citation:8, I.F. 2.653, ISSN: 1386-1425 (Q1)

[32] P. Krishnan, S. Gunasekaran, G. Anbalagan, N. Sivakumar, K. Gayathri, Nucleation kinetics, growth, crystalline perfection, mechanical, thermal, optical and electrical characterization of brucinium 2-carboxy-6-nitrophthalate dihydrate single crystal, J. Cryst. Growth. 396 (2014) 85–94. doi:10.1016/j.jcrysgro.2014.03.044. Citation:27, I.F. 1.515, ISSN : 0022-0248 (Q3)

[33] N. Sivakumar, N. Kanagathara, B. Varghese, G. Bhagavannarayana, S. Gunasekaran, G. Anbalagan, Structure, crystal growth, optical and mechanical studies of poly bis (thiourea) silver (I) nitrate single crystal: A new semi organic NLO material, Spectrochim. Acta – Part A Mol. Biomol. Spectrosc. 118 (2014) 603–613. doi:10.1016/j.saa.2013.09.010. Citation:23, I.F. 2.653, ISSN: 1386-1425 (Q1)

[34] N. Sivakumar, N. Kanagathara, K. Gayathri, P. Krishnan, G. Anbalagan, Synthesis, thermal decomposition and dielectric behavior of bis(thiourea)silver(I)nitrate: A new semi-organic single crystal, J. Therm. Anal. Calorim. 115 (2014) 1295-1301. doi:10.1007/s10973-013-3430-7. Citation:7, I.F. 2.042, ISSN : 1388-6150. (Q3)

[35] V. Sangeetha, K. Gayathri, P. Krishnan, N. Kanagathara, N. Sivakumar, G. Anbalagan, Growth, optical, thermal, dielectric and microhardness characterizations of melaminium bis (trifluoroacetate) trihydrate single crystal, J. Cryst. Growth. 389 (2014) 30-38. doi:10.1016/j.jcrysgro.2013.11.026. Citations : 58, I.F. 1.515, ISSN : 0022-0248 (Q3)

[36] V. Sangeetha, R. Sumathi, N. Kanagathara, N. Sivakumar, G. Anbalagan, Spectral and Thermal Degradation of Melamine Cyanurate, J. Mater. 2013, (2013) 262094. doi:10.1155/2013/262094. Citation:15, I.F. 0.84

[37]. K. Gayathri, P. Krishnan, N. Sivakumar, V. Sangeetha, G. Anbalagan, Growth, optical, thermal, mechanical and dielectric characterization of brucinium hydrogen maleate, J. Cryst. Growth. 380 (2013) 111–117. doi:10.1016/j.jcrysgro.2013.06.004. Citation:20, I.F. 1.515, ISSN : 0022-0248 (Q3)

[38]. P. Krishnan, K. Gayathri, N. Sivakumar, G. Chakkaravarthi, G. Anbalagan, 2,3-Dimethoxy-10-oxostrychnidinium hydrogen oxalate dihydrate, Acta Crystallogr. Sect. E Struct. Reports Online. 69, (2013) o659. doi:10.1107/s1600536813008623. Citation:3, I.F. 0.5, ISSN: 2056-9890 (Q4)

[39]. N. Kanagathara, M.K. Marchewka, N. Sivakumar, K. Gayathri, N.G. Renganathan, S. Gunasekaran, G. Anbalagan, A study of thermal and dielectric behavior of melaminium perchlorate monohydrate single crystals, J. Therm. Anal. Calorim. 112 (2013) 1317–1323. doi:10.1007/s10973-012-2713-8. Citation:11, I.F. 2.206, ISSN : 1388-6150. (Q3)

[40]. P. Krishnan, K. Gayathri, N. Sivakumar, B. Gunasekaran, G. Anbalagan, Bis(2,3-dimethoxy-10-oxostrychnidinium) phthalate nonahydrate, Acta Crystallogr. Sect. E Struct. Reports Online. 69 (2013) o870. doi:10.1107/S160053681301204X. Citation:4, I.F. 0.5, ISSN: 2056-9890 (Q4)

[41]. N. Kanagathara, N. Sivakumar, K. Gayathri, P. Krishnan, N.G. Renganathan,                   S. Gunasekaran, G. Anbalagan, Growth and characterization of 2,4,6 triamino-1,3,5 triazine – An organic single crystal, Proc. Indian Natl. Sci. Acad. 79 (2013) 467-472. Citation:4, I.F. 0.5, ISSN:  2454-9983

[42] N. Sivakumar, R. Mohan Kumar, G. Anbalagan, Optical studies of Glycine Phosphite (GPI) single crystals for optical devices, Proc. Indian Natl. Sci. Acad. 79 (2013) 385-389. Citation:1, I.F. 0.5, ISSN:  2454-9983

[43]. N. Kanagathara, N.G. Renganathan, M.K. Marchewka, N. Sivakumar, K. Gayathri,          P. Krishnan, S. Gunasekaran, G. Anbalagan, Growth and characterization of Melaminium bis (trichloroacetate) dihydrate, Spectrochim. Acta Part A Mol. Biomol. Spectrosc. 101 (2013) 112–118. doi:10.1016/j.saa.2012.09.057. Citation:39, I.F. 2.129, ISSN: 1386-1425 (Q1)

[44]. N. Sivakumar, R.M. Kumar, G. Anbalagan, Effect of Glycine Doping in Potassium Hydrogen Phthalate (KHP) Crystals on Structural and Optical Properties, Adv. Mater. Res. 584 (2012) 116-120. doi:10.4028/www.scientific.net/amr.584.116. Citation:2, I.F.0.5, ISSN: 1662-8985

[45]. R. Ashok Kumar, R. Ezhil Vizhi, N. Sivakumar, N. Vijayan, D. Rajan Babu, Crystal growth, optical and thermal studies of nonlinear optical γ-glycine single crystal grown from lithium nitrate, Optik (Stuttg). 123 (2012) 409-413. doi:10.1016/j.ijleo.2011.04.019, Citation:30, I.F. 0.8, ISSN : 0030-4026 (Q2)

[46]. R.A. Kumar, N. Sivakumar, R.E. Vizhi, D.R. Babu, The effect of Fe3+ doping in Potassium Hydrogen Phthalate single crystals on structural and optical properties, Phys. B Condens. Matter. 406 (2011) 985–991. doi:10.1016/j.physb.2010.12.044.  Citation:24, I.F. 1.063, ISSN : 0921-4526. (Q3)

[47]. P. Veeraragavan, S. Kumararaman, S. Kumaravel, P. Madhavasarma, N. Sivakumar, Studies on Hall effect and conductivity measurement of natural human bones, IJRAR, 6 (2019) 828–835. I.F. 0.44

[48]. P. Veeraragavan, S. Kumararaman, S. Kumaravel, P. Madhavasarma, N. Sivakumar, Effect of sintering on microstructure of human natural bone, IJRAR, 6 (2019) 495–503. I.F. 0.44

[49]. A. Jagadesan, N. Sivakumar, S. Arjunan, Growth, structure and spectroscopic studies of an organic optical material: 4-Aminopyridinium 4-nitrophenolate 4-nitrophenol single crystal, J. Indian Chem. Soc. 96 (2019) 61-62. I.F. 0.82

[50]. J. Venkatamuthukumar, N. Sivakumar, Growth, structural, spectral and nonlinear optical studies on potassium hydrogen phthalatsingle crystals with glycine as additive, J. Indian Chem. Soc. 96 (2019) 59-60. I.F. 0.82

[51]. A. Jagadesan, N. Sivakumar, R. Thinesh Kumar, S. Arjunan, Growth, , Structure and spectroscopic studies of an organic optical material: Benzimidazole, benzimidazolium pictrate crystal. Adv. Mater. Proc. 4 (2019) 122-124. I.F. 0.92

[52]. N. Sivakumar, J. Venkatamuthukumar, F. Mary Anjalin, G. Anbalagan, A. Jagadesan, Structural and spectroscopic characterization studies on metal – organic material: poly bis (thiourea) silver (I) nitrate (TUSN) single crystal, IJACSA, 5 (2017) 25-29.  I.F. 0.92

[53] V. Sangeetha, R. Sumathi, N. Kanagathara, N. Sivakumar, G. Anbalagan, Spectral and Thermal Degradation of Melamine Cyanurate, J. Mater. (2013). doi:10.1155/2013/262094. I.F. 0.84

Invited Talks: Research works carried out at FMRL are delivered as Guest lectures in various National and International conferences.

  • Sivakumardelivered a guest lecture on “Advanced developments in synthesis of Bio-nano crystal structures” held at Department of Bio-Medical Engineering, AVIT, Paiyanoor, Chennai-603 104, Tamil Nadu, India, during 13, November, 2020.
  • Sivakumardelivered webinar talk on “Advancement of Thermal studies on technologically important Materials” held at Saraswathi College of Engineering and Technology, Olakkur, Tindivanam-604 305, Tamil Nadu, India, during 14th, Sep., 2020.
  • Sivakumardelivered webinar talk on “Advancements in Optical Communication through Optical Fibres” held at Department of Physics, V.V.Vanniaperumal College of Women, Virudhunagar-626 001, Tamil Nadu, India, during 27th, May, 2020.
  • Sivakumardelivered an Invited talk on “Crystal Structure and thermal kinetic approach on benzylideneaniline derivartive: p-nitrobenzylidene-p-phenylamineaniline” held at National Conference on Functional Materials and its Applicational Aspects (NCFMAA-2020), Department of Materials Science, Saveetha University, Chennai-602 105, Tamil Nadu, India, during 6th, March, 2020.
  • Sivakumargiven a guest lecture on “Modern cutting-Edge Research on Artificial emulation fo Human Bone for Bio-Medical Application” held at Department of Bio-Medical Engineering, AVIT, Paiyanoor, Chennai-603 104, Tamil Nadu, India, during 27, February, 2020.
  • Sivakumargiven a guest lecture on “Recent trends in Bio-Medical Research” held at Department of Bio-Medical Engineering, AVIT, Paiyanoor, Chennai -603 104, Tamil Nadu, India, during 28, August, 2019.

Reviewer and Editorial Board Member : Faculties at FMRL are highly potential in research and holds portfolio as a Reviewer and Editorial Board Member in a various reputed international journals. 

  • Materials Letters (Elsevier)
  • Optical Materials (Elsevier)
  • Spectrochimica Acta A: Molecualr and Bio molecular spectroscopy (Elsevier)
  • Materials Chemistry and Physics (Elsevier)
  • World Journal of Applied Chemistry (Science Publishing)
  • Turkish Journal of Chemistry (Scientific and Technological Research)
  • Journal of Alloys and Compounds (Elsevier)
  • Materials Today Proceedings (Elsevier)
  • Journal of Solid State Electrochemistry (Springer)
  • Current Indian Science, Bentham Sciences (Editorial Board Member)

Awards & Recognition: As an added feather to his cap, faculties received many awards and recognition from the reputed State, National and International Bodies and bring more laurels to the institution.

Awards & Recognition of Dr. N. Sivakumar

  • Kalki krishnamurthy fellowship for UG,
  • Tamil Nadu Educational Trust fellowship for UG
  • Best student and University Rank Holder award-UG
  • Class Topper – PG, Presidency College (Autonomous), Chennai.
  • UGC-Dr. S. Kothari Postdoctoral Fellowship (2017)
  • Certificate of reviewing from the Journal Spectrochemica acta A, 2018.
  • Certificate of outstanding contribution in reviewing from the Journal Materials Letters, 2018.
  • National Award for Best thesis in Crystal Growth during Jan. 29-31, 2018 from Indian Association for Crystal Growth (IACG).
  • Best Oral Presentation Award -(NewPhy 2020)” held at  The New College, Chennai, India, during 21st, January, 2020.
  • DST-TARE Faculty (2021), DST-SERB, New Delhi.
  • Indian SpectroPhysics Association (ISPA) Award 2022, During the International Virtual Conference on Materials Science and Technology (ICMAST –2022), 15th March 2022, Kandaswamy Kandar’s College, Velur, Namakkal.

Insights

Collaborations

National Collaborators:

  • IITM, Chennai.
  • CLRI, Chennai.
  • IGCAR,  Kalpakkam.
  • Anna University, Chennai.
  • National Physical Laboratory, New Delhi.
  • Delhi University, New Delhi.
  • The University of Burdwan, West Bengal.
  • Kakatiya University, Warangal.
  • SSN Engineering College, Chennai.
  • VIT University, Vellore.
  • Presidency College, Chennai.
  • Pachaiyappa College, Chennai.
  • Loyola College, Chennai.
  • Queen Mary’s College, Chennai

 

International Collaborators:

  • National Institute for Materials Science (NIMS), Japan
  • KTH Royal Institute of Technology, Sweden
  • Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Poland
  • National Isotope Centre, GNS Science, New Zealand
  • Universidad Austral de Chile, Chile.
  • King Saud University, Saudi Arabia.

Facilities:

Box Furnace

What is this? Furnaces are used to provide continuous heating to process samples and materials. They are generally built from carbide steel material so that they can maintain high temperatures without breaking down. Research furnaces are mainly used to study the structural nature of the materials at variable temperature.

Specifications: Temperature: 1200 ºC, Maintained environment, Programmable control panel, 16 segment

Research Focus: Preparation of Inorganic compounds, Heat treatment process on various nanocomposite and bone materials.

Ultrasonicator


What is this? It is used in the Process of applying sound energy through an ultrasonic bath or an ultrasonic probe to agitate particles in a sample material. It is used in academic, clinical and forensic laboratories that need to disintegrate cells, bacteria, spores or tissue.

Specification: Operated up to 60 ºC, 230 V, 15 Amps.

Research Focus: Prepared Nanomaterials can be dispersed in to well defined particles which will be highly helpful in taking SEM/TEM photographs. It is also useful in the synthesis of nanocomposites.

Fume Cupboard

What is this? A fume cupboard is a ventilation apparatus designed to remove hazardous or toxic vapors, fumes, and dusts outside the laboratory. This type of laboratory equipment is designed to protect workers or researchers from inhaling toxic gases while protecting the product or the experiment.

Specification: 18 Inches height, 2 exhaust fan motors.

Research Use: It is used in synthesizing organic and inorganic crystals, perovskites, nanocomposite. It is also used in temperature dependent synthesis and reflux processes.

Constant Temperature Bath with cooling

What is this? Constant temperature bath (CTB) is used to perform certain chemical reactions which occur at high temperature. It is highly preferred to use for flammable chemicals in order to prevent ignition.

Specification: Temperature range from 20 to 60 ºC, Temperature controller and in/out water circulation.

Research Use: For the growth of single crystals, constant temperature should be maintained throughout its growth period. Temperature uniformity in and around the mother solution is more important in crystal growth to avoid secondary nucleation. By using CTB, slow evaporation as well as slow cooling process can be applied for the growth of crystals.

Hydrothermal Autoclave

What is this? : The Hydrothermal Autoclave is used for hydrothermal reaction process at high pressure and high temperature. It is Polytetrafluoroethylene (PTFE) or Teflon lined hydrothermal autoclave. It consists of two parts; outer high-quality stainless steel jacket and inner Teflon liner or Teflon chamber. In the Teflon-lined autoclave, the reaction is carried out at maximum 240 ºC. However the safe temperature is 200 ºC. This apparatus is widely used in the scientific laboratory, research and development labs, quality analysis section in industries and institutional organizations.

Specification: Operating temperature: ≤ 240 °C, Safe temperature limit: 200 °C, Pressure: ≤ 3 MPa, Heating/Cooling Rate: ≤5 °C/min.

Research Use: It is used to synthesize Inorganic Nanomaterials and Magnetic powders. It is also used in various low temperature heat treatment processes.

Research Activities: We are actively working on various research fields such as Crystallography, Crystal growth, Nanomaterials, Spectroscopy and DFT calculations, Thermal kinetics approaches and Biomaterials for the development of advanced functional materials and their potential use.

Crystallography

The ORTEP molecular structure of the Thiourea Silver (I) Nitrate crystalline compound, showing displacement ellipsoids drawn at 30% probability level. H atoms are removed for structure clarity.

We are synthesizing Organic and Inorganic crystalline materials at FMRL centre using solution process, mechanochemical synthesis method and solid state reactions. Synthesized materials are purified by repeated recrystallization processes and are subjected to single crystal X-ray diffraction study. The collected diffracted data will be analyzed and solved the crystal structure solved by directed methods (SHELXL-97) and refined by a full matrix (SHELXL-97) least square procedure.

Crystal Growth
Growth of single crystals is considered to be the pillars of advanced technology. “Who dominated, materials dominated technology”. To expedite research interest in crystal growth, it demands deep knowledge of science and technology since single crystals have vital importance in the technological world. Crystal growth never has an independent individuality and is the part of crystallography until few centuries back.

Many single crystals play vital role in important areas of service to the humanity, namely science, medicine, engineering, technology, defence and space science. In addition to above, crystals are mainly used in piezoelectric, photo-refractive, acousto-optic, electro-optic, photo-elastic applications. Crystals also have importance in radiation detectors, transducers, laser hosts, harmonic generators, parametric amplifiers, Bragg cells, etc. Thus the above mentioned developments could be achieved only by the availability of single crystals like silicon, germanium, gallium, gallium arsenide and growth of new nonlinear optical organic, inorganic and semi-organic single crystals.

Solution Growth


Solution Grown single crystals grown at FMRL Laboratory

Solution growth is a simple, cost advantage method for the production of technologically important single crystals. It is the most widely used technique for the growth of crystals, when the starting materials are unstable at high temperatures. This method mainly depends on the solubility of solute on the thermodynamical conditions like temperature, pressure and solvent concentration. Hence, this method is adopted for the materials having moderate to high solubility in the temperature range from RT to 100 °C at atmospheric pressure. Bulk sized single crystals having high solubility with respect to the temperature, can be grown from solution growth.

Melt Growth

Cut-Polished (a) LaFeO3 and (b) LaSrFeO3 Single Crystals using optical floatingzone method

Melt growth is the process of crystallization of fusion and resolidification of the pure material from a melt by cooling the liquid below its freezing point. In this technique, apart from possible contamination from crucible materials and surrounding atmosphere, no impurities are introduced in the growth process and the rate or growth is normally much higher than possible by other methods. Melt growth is commercially the most important method of crystal growth.

Nanomaterials

(a & b) development of LaFeO3 nanoparticles on rGO layers in 5 µm scale and

(c & d) spherical morphology of LaFeO3 nanoparticles on rGO layers in 2 µm scale

Nanotechnology is the general term for designing and making materials which depends on specific structure at the nanoscale (100 nm or less). It includes devices or systems made by manipulating individual atoms or molecules, as well as materials which contain very small structures. They may be in the form of particles, tubes, rods or fibers. The materials in the form of nano scale shows improved physico-chemical properties than that are in the in the bulk form.

Spectroscopy and DFT Calculations


Spectroscopy is a potential tool for studying the structures of atoms and molecules. The large number of wavelengths emitted by these systems makes it possible to inspect their structures in detail, including the electron configurations of ground and various excited states. Spectroscopy also provides a precise analytical method for finding the constituents in material having unknown chemical composition. In a typical spectroscopic analysis, concentration of a few parts per million of a trace element in a material can be detected through its spectrum.

Density functional theory (DFT) is a quantum-mechanical (QM) computational method used in chemistry and physics to calculate the electronic structure of atoms, molecules and solids. The real forte of DFT is its favourable price/performance ratio compared with electron-correlated wave function-based methods such as Møller–Plesset perturbation theory or coupled cluster. Thus, more relevant molecular systems can be studied with sufficient accuracy, thereby expanding the predictive power inherent in electronic structure theory. As a result, DFT is now by far the most widely used electronic structure method. The huge importance of DFT in physics and chemistry is evidenced by the 1998 award of the Nobel Prize to Walter Kohn ‘for his development of the density-functional theory’.

Thermal kinetics Approaches

(a) TG, (b) DTG and (c) DTA curves of Phenyl derivative molecule at different heating rates (5, 10 and 15 ºC min-1).

Methods of thermal analysis and their kinetic models are most widely used in almost all the branches, from foods and pharmacy to materials, glasses and polymers where changes in thermal activities of the sample are monitored under different temperature conditions like controlled heating and cooling atmospheres. We are focusing research work on the thermal kinetic studies to understand the fundamental characteristics of materials as well as their large range of utility in quality control, improvement and research in industry and academia.

Bone materials

SEM Photographs of human bones sintered at different temperatures ranging from 250 to 750 ºC.

Bone is a composite of proteins such as collagen and minerals such as calcium. Together these materials give bone a unique combination of strength and elasticity. We at FMRL centre studying the effect of temperature on human bone in order to understand their structure, porosity, strength, thermal stability and mechanical stabilities.

Events:

Dr. N. Sivakumar

Centre Head

Functional Materials Research Laboratory (FMRL)

Sri Sai Ram Engineering College
West Tambaram

Chennai, Tamil Nadu – 600044

Phone

91-416220-2350 / 2353

Email

sivakumar.phy@sairam.edu.in

head.fmrl@sairam.edu.in