Publications

Publications

 

  1. Siril V. S., K. N. Madhusoodanan, Sinjumol K. Rajan, and Godfrey Louis, "Study on ammonia gas sensing property of hydrothermally synthesized pure ZnO nanorods", AIP Conference Proceedings 1849, 020033 (2017). http://dx.doi.org/10.1063/1.4984180
  2. J. Jubimol, D.R. Deepu, C S. Rajesh, G. Aswathy, C. S. Kartha, Godfrey Louis and  K.  P. Vijayakumar,  “Photoluminescence Based Investigations Of Precursor Related Impacts On Silver Doped ZnO Thin Films,” in 13th International Conference on Fiber Optics and Photonics, 2016, p. W3A.24. https://doi.org/10.1364/PHOTONICS.2016.W3A.24 
  3. D. R. Deepu, J. Jubimol, C. S. Kartha, G. Louis, K. R. Kumar, and K. P. Vijayakumar, “Modification of opto-electronic properties of ZnO by incorporating metallic tin for buffer layer in thin film solar cells,” AIP Conf. Proc., vol. 1665, p. 120019, 2015. http://dx.doi.org/10.1063/1.4918126
  4. A. S. Kumar, C. Joseph, R. Paulose, R. Rajesh, G. Joseph, and G. Louis, “Microhardness studies of sulfamic acid single crystal,” IOP Conf. Ser. Mater. Sci. Eng., vol. 73, p. 012108, Feb. 2015.
  5. A. S. Kumar, N. C. Wickramasinghe, and G. Louis, “A COMPARATIVE STUDY OF TRENTEPOHLIA AND RED RAIN CELLS,” Int. J. Recent Sci. Res., vol. 4, no. 8, pp. 1205–1209, 2013.
  6. G. Louis and A. S. Kumar, “Autofluorescence characteristics of the red rain cells,” in SPIE Optical Engineering + Applications, 2013, p. 88650I–88650I–10.
  7. A. S. Kumar, L. Iype, R. Rajesh, G. Varughese, G. Joseph, and G. Louis, “Electrical conductivity and dielectric properties of potassium sulfamate single crystals,” Cryst. Res. Technol., vol. 46, no. 10, pp. 1027–1034, Jul. 2011.
  8. R. Gangappa, C. Wickramasinghe, M. Wainwright, A. S. Kumar, and G. Louis, “Growth and replication of red rain cells at 121[degree]C and their red fluorescence,” in Instruments, Methods, and Missions for Astrobiology XIII, 2010, vol. 7819, no. 1, p. 78190N–11.
  9. G. Joseph, A. S. Kumar, R. Rajesh, and G. Louis, “Growth and dc conductivity studies of tripotassium sodium dichromate single crystal,” Indian J. Phys., vol. 84, no. 9, pp. 1123–1128, 2010.
  10. G. Louis and A. S. Kumar, “Growth characteristics of red rain microbes at temperatures below 100 deg C,” in Instruments, Methods, and Missions for Astrobiology XIII, 2010, vol. 7819, no. 1, p. 78190R–9.
  11. A. Santhosh Kumar, G. Varughese, L. Iype, R. Rajesh, G. Joseph, and G. Louis, “Electrical conductivity of sulfamic acid single crystals,” Cryst. Res. Technol., vol. 45, no. 8, pp. 879–882, Jun. 2010.
  12. G. Varughese, A. Santhosh Kumar, and G. Louis, “Detection of elastic and electric conductivity anomalies in Potassium Sulphamate single crystal,” Phys. B Condens. Matter, vol. 405, no. 7, pp. 1813–1816, Apr. 2010.
  13. G. Varughese, A. Santhosh Kumar, J. Philip, and G. Louis, “Anisotropy in elastic properties of lithium sodium sulphate hexahydrate single crystal - An ultrasonic study,” Bull. Mater. Sci., vol. 32, no. 6, pp. 621–626, Feb. 2010.
  14. G. Joseph, A. S. Kumar, L. Iype, R. Rajesh, and G. Louis, “DC conductivity studies in K 3 Na(SeO 4 ) 2 single crystals,” Cryst. Res. Technol., vol. 44, no. 7, pp. 759–762, Jul. 2009.
  15. G. Joseph, a S. Kumar, L. Iype, R. Rajesh, and G. Louis, “DC conductivity studies in K 3 Na(SeO 4 ) 2 single crystals,” Cryst. Res. Technol., vol. 44, no. 7, pp. 759–762, Jul. 2009.
  16. A. S. Kumar and G. Louis, “An optical spectroscopic study correlating the yellow rain and cultured red rain microbes,” in Instruments and Methods for Astrobiology and Planetary Missions XII, 2009, vol. 7441, no. 1, p. 74410N–6.
  17. G. Varughese, A. S. Kumar, J. Philip, and G. Louis, “Elastic constant measurements of super ionic LiKSO 4 :Na single crystals,” Cryst. Res. Technol., vol. 44, no. 3, pp. 300–304, Mar. 2009.
  18. G. Varughese, A. S. Kumar, J. Philip, and G. Louis, “Elastic study of Potassium Sulphamate crystal using ultrasonic Pulse Echo Overlap technique,” Solid State Commun., vol. 149, no. 15–16, pp. 645–647, Apr. 2009.
  19. G. Louis and A. S. Kumar, “Unusual autofluorescence characteristic of cultured red-rain cells,” in Instruments, Methods, and Missions for Astrobiology XI, 2008, vol. 7097, no. 1, pp. 709712–9.
  20. G. Louis and A. S. Kumar, “The Red Rain Phenomenon of Kerala and its Possible Extraterrestrial Origin,” Astrophys. Space Sci., vol. 302, no. 1–4, pp. 175–187, Apr. 2006.
  21. G. Joseph, A. S. Kumar, L. Iype, and G. Louis, “AC conductivity and dielectric studies of K3Na(SeO4)2 single crystals in the high temperature region,” Indian J. Phys., vol. 79, pp. 699–702, 2005.
  22. R. R, A. S. Kumar, G. Joseph, and G. Louis, “Dielectric and Conductivity Studies of NiSeO4. 6H2O single crystal below room temperature,” in Proceedings of the DAE Solid State Physics Symposium Vol.50, 2005, pp. 745–746.
  23. R. Rajesh, A. S. Kumar, L. Iype, G. Joseph, and G. Louis, “Growth and DC Conductivity studies in MnSeO4.2H2O single Crystal,” Indian J. Phys., vol. 79, pp. 691–693, 2005.
  24. G. Varughese, A. S. Kumar, A. V. Alex, J. Philip, and L. Godfrey, “Elastic Properties of Potassium Lithium Hydrogen Sulphate Crystal: An Ultrasonic Study,” Ferroelectrics, vol. 323, no. 1, pp. 133–137, Aug. 2005.
  25. G. Louis and A. S. Kumar, “New biology of red rain extremophiles prove cometary panspermia,” eprint arXiv:astro-ph/0312639, pp. 1–17, Dec. 2003.
  26. G. Louis and A. S. Kumar, “Cometary panspermia explains the red rain of Kerala,” eprint arXiv:astro-ph/0310120, pp. 1–20, Oct. 2003.
  27. G. Varughese, L. Jose, P. S. Nair, A. Geeth, and L. Godfrey, “Thermal Studies of Phase Transition in NLO Sulphamic acid Crystal,” in Proceedings of DAE-BRNS National Laser Symposium December 22-24, 2003, 2003, pp. 325–326.
  28. G. Varughese, A. S. Kumar, L. Iype, A. V. Alex, J. Philip, and L. Godfrey, “Elastic properties of NLO sulphamic acid crystals,” in Proceedings of DAE-BRNS National Laser Symposium Nov 14-16, 2002, 2002, pp. 493–494.
  29. L. Godfrey and J. Philip, “Phase transitions in lithium ammonium sulfate below room temperature: An ultrasonic study,” Phys. Rev. B, vol. 54, no. 22, pp. 15708–15713, Dec. 1996; http://dx.doi.org/10.1103/PhysRevB.54.15708
  30. L. Godfrey and J. Philip, “Ultrasonic measurement of the elastic constants of LiKSO4 between 300 and 370 K,” Solid State Commun., vol. 97, no. 7, pp. 635–638, Feb. 1996.
  31. L. Godfrey and J. Philip, “Numerical technique for bond correction in ultrasonic measurements,” Acoust. Lett. (UK), vol. 19, pp. 11–14, 1995.
  32. L. Godfrey, J. Philip, and M. T. Sebastian, “Elastic constants and high-temperature elastic anomalies near 425 K in lithium hydrazinium sulfate,” J. Appl. Phys., vol. 75, no. 5, p. 2393, 1994.
  33. J. Isaac, L. Godfrey, and Jacob Philip, “A low cost high precision proportional integral derivative temperature controller,” Indian J. Pure Appl. Phys., vol. 29, pp. 198–197, 1991.
  34. L. Godfrey and J. Philip, “A temperature controller for crystal growth experiments of long duration,” J. Phys. E., vol. 22, no. 7, p. 516, 1989.
  35. L. Godfrey and K. Viswanathan, “Low-cost precision high temperature controller,” Indian J. Pure Appl. Phys., vol. 22, pp. 505–7, 1984.