Dr. Preema C Thomas

Associate Professor
Email: [email protected]

Education

  • BSc. MG University 1998
  • MSc. MG University 2000
  • BEd. MG University 2001
  • Ph.D. University of Madras 2007

Area of Specialization

Material Science

  • Biodegradable EMI Shielding materials Electromagnetic pollution is a great threat to technological development and growth of electronic industry. Fabrication of EMI Shielding materials is of great importance. We are focusing on biodegradable EMI shielding materials since it paves a path towards sustainable development. We have developed biodegradable fabrics to stifle EM radiations with naturally abundant jute fabric incorporated with conducting polymers. We are also focusing on the possibility of making shielding materials from recycled waste materials which can be beneficial for waste management as well as for suppressing EM
    radiations simultaneously.
  • Conducting polymers and nano biomaterials. We are also working on various conducting polymers like polypyrrole and PEDOT.
    We have studied the possibilty of using these polymers for various application part like EMI sheilding efficiency, dopamine sensors, etc. Another team of ours is working on nano biomaterials. We have started our work by synthesizing these composites. These were found to be biocompatible. The application part is yet to me tested.
  • Synthesis of nanoparticles ZnO nanoparticles are widely used in various applications due to its exceptional electronic properties. ZnO nanoparticles with desired morphology and properties can be synthesized by various techniques. We have synthesized ZnO nanoparticles by both hydrothermal and solvothermal method and investigated its potential to enhance the activity of antibiotics.
    My research group has interest on synthesis of nanomaterials and nanocomposites in different methods and explores its suitability for various applications.

  • PG Courses
  • Mathematical Physics-I, Applied Mathematics-I, Quantum Mechanics, Optoelectronics & Integrated Electronics
  • UG Courses
  • Quantum Mechanics and Solid State Physics

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  1. Paper Presented in International Conferences:
    Growth and characterization of nonlinear optical crystals of LAP family, J. Madhavan, Preema C. Thomas, S.M. Ravi Kumar, K. Praba, Joe G.M. Jesudurai and P. Sagayaraj. International Conference on Optics and Optoelectronics, IRDE, Dehradun, Uttaranchal,
    December 12-15, 2005.
  2. Growth and characterization of L-arginine iodate single crystals, Preema C. Thomas, Lanka Bhushan Kumar, S. Aruna, J. Madhavan and P. Sagayaraj. International Conference on Optics and Optoelectronics, IRDE, Dehradun, Uttaranchal, December 12-15, 2005.
  3. Growth characterization of gel grown tetrakis thiourea nickel chloride single crystals, K. Ambujam, Preema C. Thomas, S. Aruna, D. Prem Anand and P. Sagayaraj. International Conference on Optics and Optoelectronics, IRDE, Dehradun, Uttaranchal, December 12-15, 2005.
  4. Optical and mechanical properties of metal substituted LADP single crystals, A. Joseph Arul Pragasam, J. Packiam Julius, D. Prem Anad, Preema C. Thomas and P. Sagayaraj, The 3rd Asian Conference on Crystal Growth and Crystal Technology, Oct. 16-19, 2005, Beijing, China.
  5. Growth and characterization of pure, Cu and Mg doped L-arginine acetate NLO single crystals, J. Madhavan, Preema C. Thomas, L. Bhushan Kumar, Jolly Thomas, A. Joseph Arul Pragasam, Ramprasad and P. Sagayaraj, The 3rd Asian Conference on Crystal Growth and Crystal Technology, Oct. 16-19, 2005, Beijing, China.
  6. Growth and characterization of semiorganic non-linear optical L-histidine disphosphate (LHDP) single crystal, , J. Madhavan, Preema C. Thomas, K. Ambujam, S. Aruna and P. Sagayaraj, The 3rd Asian Conference on Crystal Growth and Crystal Technology, Oct. 16-19, 2005, Beijing, China.
  7. Growth and characterization of an NLO crystal: ATCC: Ginson P. Joseph, K. Rajarajan, M. Vimalan, Preema C. Thomas, S. Selvakumar, K. Ambujam, P. Sagayaraj, Photonics 2006, Dec 13-16, Hyderabad University, Hyderabad.
  8. Growth, Optical and ESR studies of CMTWMP: a novel organometllic nonlinear optical single crystals: I. Vetha Potheher, K. Rajarajan, Ginson P. Joseph, Preema C. Thomas, M. Vimalan, G. Mani, S. M. Ravikumar and P. Sagayaraj, Photonics 2006, Dec 13-16, Hyderabad University, Hyderabad.
  9. Growth and characterization of organic NLO crystals of LAM: M. Vimalan, S. Aruna, Preema C. Thomas, G. Mani, J. Packiam Julius, V. Joseph, I. Vetha Potheher and P. Sagayaraj, Photonics 2006, Dec 13-16, Hyderabad University, Hyderabad.
  10. Fabrication of polyaniline nanocomposites as electrode material for power generation in microbial fuel cells. Savitha Mathew and Preema C. Thomas, International conference on photochemistry and sustainable energy, October 2019.

Paper Presented in National Conferences:

  1. Growth, thermal and optical studies of bis-glycine hydrogen chloride K.Ambujam, K.Rajarajan, Preema C.Thomas, K.Prabha, S.M.Ravi Kumar, I.Vetha Potheher and P.Sagayaraj. Fifth DAE-BRNS National Laser Symposium (NLS-5), Vellore Institute of Technology (VIT), Vellore, December 7-10, 2005.
  2. LAA single crystals for NLO applications, J. Madhavan, Preema C. Thomas P. Sagayaraj. Fifth DAE-BRNS National Laser Symposium (NLS-5), Vellore Institute of Technology (VIT), Vellore, December 7-10, 2005.
  3.  Growth and optical studies of LAHClBr crystals, Preema C.Thomas, Sona Elizabeth Joseph, S.Aruna and P.Sagayaraj. Fifth DAE-BRNS National Laser Symposium (NLS-5), Vellore Institute of Technology (VIT), Vellore, December 7-10, 2005.
  4. Growth and characterization of nonlinear optical LAFB single crystals, Preema C. Thomas, S. Aruna, A. Anuradhaa, A. Stephen, K. Prabha and P. Sagayaraj. UGC Sponsored Regional Level Seminar on crystal growth, characterization and application (SOCCAA – 05), Department of Physics, PSG Arts and Science College, Coimbatore, December 30-31, 2005.
  5. Growth and characterization of single crystals of LAHClBr, Preema C. Thomas, Sona Elizabeth Joseph, A. Joseph Arul Pragasam and P. Sagayaraj. National Symposium on Crystal Growth and Characterization, Department of Physics, Loyola College, Chennai, septemper 29& 30, 2005
  6. Growth and characterization of Gel grown tetrakis thiourea nickel chloride single crystals, K. Ambujam, Preema C. Thomas, S. Aruna, D. Prem Anand and P. Sagayaraj. National Symposium on Crystal Growth and Characterization, Department of Physics, Loyola College, Chennai, septemper 29& 30, 2005
  7. Growth and characterization of gel grown tetrakis thiourea nickel chloride single crystals. K. Ambujam, Preema C. Thomas, D. Prem Anand, S. Aruna, K. Praba and P. Sagayaraj. National conference on preparation and characterization of rystalline materials; January 19th to 21st, 2006. Hindu College, Nagarcoil
  8. Growth and Characterization of pure, Mg and Cu doped L-arginine acetate NLO single crystals, J. Madhavan, J. Packiam Julius, Preema C. Thomas, S. Aruna, M. Gulam Mohamed, A. Anuradha and P. Sagayaraj. National conference on preparation and characterization of crystalline materials; January 19th to 21st, 2006. Hindu College, Nagarcoil
  9. Optical, thermal and dielectric studies of non-linear optical single crystals of L-Argininium dinitrate, Preema C. Thomas, S. Aruna, J. Madhavan, Tina Thomas and P. Sagayaraj. National conference on preparation and characterization of crystalline materials; January 19th to 21st, 2006. Hindu College, Nagarcoil.
  10. Growth, optical and magnetic properties of LAF single crystals, D.Prem Anand, J. Packiam Julius, Preema C. Thomas, J. Madhavan, M. Vimalan, S. Aruna and P. Sagayaraj. National conference on preparation and characterization of crystalline materials; January 19th to 21st, 2006. Hindu College, Nagarcoil.
  11. Mechanical, Dielectric and photoconductivity properties of N-methyl urea single crystal, D. Prem Anand, M. Gulam Mohamed, M. Vimalan, K. Ambujam, A. Anuradha, Preema C. Thomas and P. Sagayaraj. National conference on preparation and characterization of crystalline materials; January 19th to 21st, 2006. Hindu College, Nagarcoil.
  12. Growth and Characterization of single crystals of L-argininium dinitrate, Preema C Thomas, Jolly Thomas, J. Madhavan, K. Rajarajan and P. Sagayaraj. DAE Solid State Physics Symposium, Gurunanak Dev University, Amristsar Dec 26-30, 2004.
  13. Photoconductivity studies of LAHF, LAHBr, LAHCL and LAF NLO single crystals of LAP family, J. Packium Julius, A. Joseph Arul Pragasam, Preema. C. Thomas, K. Ambujam and P. Sagayaraj. Tenth National Seminar on Crystal Growth, Kongu Engineering College, Erode on January 27-29, 2005
  14. Growth and Electrical Characterization of Dichloro Nickel Tetrakis Thiourea single crystals, K. Ambujam, D. Prem Anand, Preema C. Thomas, S. Aruna, P. Sagayaraj, National Conference on Application Oriented Materials (NCAOM 2006) held at SRM Institute of Science and Technology, Deemed University, Chennai, April 21 & 22, 2006.
  15. Optical and dielectric properties of a novel NLO crystal of Urea L-alanine, M. Vimalan, K. Ambujam, S.M. Ravi Kumar, D. Prem Anand, Preema C.Thomas, S. Aruna, A. Ramanand, P. Sagayaraj, National Conference on Application Oriented Materials (NCAOM 2006) held at SRM Institute of Science and Technology, Deemed University, Chennai, April 21 & 22, 2006
  16. Growth and Spectroscopic studies of nonlinear optical single crystals of LADN and LADI. Preema C. Thomas, S. Aruna, J. Madhavan, I. Vetha Potheher, S. M. Ravi Kumar and P. Sagayaraj National conference on advances in technologically important crystals, University of Delhi, Delhi, October 12- 16, 2006.
  17. Growth, structural, Microhardness and dielectric studies of a semiorganic LHPCL nonlinear optical single crystal: S. Aruna, Preema C. Thomas, K. Ambujam, K. Prabha, M. Vimalan, Tina Thomas and P. Sagayaraj National conference on advances in technologically important crystals, University of Delhi, Delhi, October 12- 16, 2006.
  18. Photoconductivity and dielectric study of single crystals of L-argininium diiodate and L-arginine tetrafluoroborate: Preema C. Thomas, S. Aruna, A. Joseph Arul Pragasam, J. Madhavan, J. Packiam Julius, K. Prabha and P. Sagayaraj, 11th National seminar on Crystal Growth, SSN College of Engineering, SSN nagar, Dec 7-9, 2006.
  19. Investigations on the optical, electric and dielectric properties of semiorganic NLO crystals of LHB: Preema C. Thomas, Reena Ittyachan, S. Aruna, M. Vimalan, A. Anuradha, S. M. Ravikumar and P. Sagayaraj, 11th National seminar on Crystal Growth, SSN College of Engineering, SSN nagar, Dec 7-9, 2006.
  20. Growth, high-resolution X-ray diffraction (HRXRD) and microhardness studies of single crystals of L-argininium perchlorate: S. Aruna, Preema C. Thomas, J. Packium Julius, P. Dennis Christy, M. Margret, K. Prabha and P. Sagayaraj, 11th National seminar on Crystal Growth, SSN College of Engineering, SSN nagar, Dec 7-9, 2006.
  21. Variation in wettability property of polythiophene nanocomposites. Gopika G. Nair and Preema C. Thomas, National conference on Advances in Nanomaterials and Nanotechnology, Mar Thoma College, Thiruvalla, August 6-7, 2019.
  22. Studies on the effect of metal oxide/metal doped metal oxide nanoparticles on wettability property of polythiophene. Gopika G. Nair and Preema C. Thomas, National conference on recent trends in material science and technology, IIST Thiruvananthapuram, December 18-20, 2019.
  23. Improvement of microbial fuel cell performance by using polyaniline nanocomposites as electrode materials, National conference on recent trends in material science and technology, Savitha Mathew and Preema C. Thomas, IIST Thiruvananthapuram, December 18-20, 2019.

Major Project Undertaken
Project title: Synthesis and characterization of zinc oxide nanoparticle and its application to
inhibit microbial action.
Project Scheme: Science Research Scheme
Funding agency: Kerala State Council for Science, Technology and Environment

S.No  Name of the Award Awarding Agency Year
1  Best oral 

Department of 

2007

presentation award 

Physics, Anna 

University, 

Chennai 
2  Best poster 

Department of 

2005

presentation award 

Physics,Loyola 

College,Chennai 

Name of the Student  Title Year of Joining
Gopika G. Nair  Studies on the effect of 

2019

metals/metal oxides on 

various polymer composites 
Aryadevi G.  Investigation on elec trically 

2020

active polymer composites 
Smitha Mathew  Polymer Nanocomposites 

2023

with Carbon based hybrid 

fillers for superior EMI 

shielding applications 

Physics
Department