ENLIGHTENMENT TO ERFECTION
Department of Physics

Dr. Malay Kumar Das


M.Sc., Ph. D.

Professor

Members of Learned Societies: Life member of Indian Liquid Crystal Society, International  Liquid Crystal Society, National Magnetic Resonance Society


Contact Addresses:

Phone +91- 0353-2582605; 9933026626
Mailing Address Department of Physicss, University of North Bengal, P.O.- NBU, Dist- Darjeeling, West Bengal, Pin -734013, India.
e-Mail mkdnbu@yahoo.com

Subject specialization: Electronics and Radio Physics.

Areas of Research Interest: Soft Condensed Matter

No. of Ph.D. students:    (a) Supervised: 03      (b) Ongoing: 06 .

No. of M.Phil. students: (a) Supervised: Nil      (b) Ongoing: Nil.

No. of Publications (Journals/Book/Book Chapter/ Monographs etc.) :      68

Achievement & Awards:

Professional Experiences:

Sl. No

Position held

Period

1.

Head, Department of Physics, University of North Bengal.

09.02.06-08.02.08

2.

Head, University Science and Instrumentation Centre, University of North Bengal.

22.02.2013 - till date

3.

Head, Department of Physics, University of North Bengal.

09.02.2014 08.02.2016

4.

Chairman of the Undergraduate Board of Sudies in Physics, University of North Bengal.

2007-2011

5.

Member of Undergraduate Board of Studies in Physics, Gour Banga University,  Malda, West Bengal

2007-2011

6.

Chairman of the Board of Research Studies in Physics, University of North Bengal.

2006-2008
2014-2016

Selective List of Publications:

  1. Critical behaviour of optical birefringence in the vicinity of nematic–isotropic and smectic A–isotropic phase transitions of the eight members of alkyloxy-cyanobiphenyls, Malay Kumar Das, Purna Chandra Barman and Sudipta Kumar Sarkar, Liquid Crystals,  2016, DOI: 10.1080/02678292.2016.1167262
  2. Order parameter and its critical exponent for some binary mixtures showing induced nematic phase, Sudipta Kumar Sarkarand Malay Kumar Das, Phase Transitions, 2016. DOI: 10.1080/ 01411594.2015.1106540
  3. Critical behaviour of a polar-polar binary system from optical birefringence measurements, Sudipta Kumar Sarkar, Anish Chakraborty, Malay Kumar Das,  Liquid Crystals, 43(1), 22-31(2016).
  4. Critical behavior at the isotropic to nematic, nematic to smectic-A and smectic-A to smectic-C phase transitions in a pyrimidine liquid crystal compound,Anish Chakraborty, Susanta Chakraborty and Malay Kumar Das, Physica B: Physics of Condensed Matter, 479, 90-95, 2015.
  5. Preparation and study of the electro-optical properties of binary mixtures of orthoconic anti-ferroelectric esters and achiral phenyl pyrimidine liquid crystal, Anamika Pramanik, Malay Kumar Das, Banani Das and Roman Dąbrowski, Soft Materials, 13, 201 (2015).
  6. High-resolution birefringence study at the nematic-smectic A phase transition of ZnS nano particle dispersed octyloxycyanobiphenyl, Malay Kumar Das, Purna Chandra Barman and Sudipta Kumar Sarkar, Eur. Phys. J. B, 88, 175 (2015).
  7. Fast switching negative dielectric anisotropic multicomponent mixtures for vertically aligned liquid crystal displays,  Prajnamita Dasgupta, Malay Kumar Das and Banani Das, Materials Research Express, 2, 045015 (2015).
  8. Self-assembling properties of lactic acid derivative with several ester linkages in the molecular core, Anamika Pramanik, Malay Kumar Das , Banani Das, Vĕra Hamplová, Miroslav Kašpar and Alexej Bubnov, Phase Transitions, 88, 745 (2015).
  9. Comparative study of the mesomorphic properties of several laterally fluorinated liquid crystalline materials, Prajnamita Dasgupta, Anamika Pramanik, Malay Kumar Das and Banani Das, Liquid Crystals, 42, 1083 (2015).
  10. Mesomorphic and structural properties of some liquid crystals possessing a bicyclohexane core, Malay Kumar Das, Prajnamita Dasgupta, Banani Das and Sudipta Kumar Sarkar International Journal of Advanced Research, 3, 967(2015).
  11. Effect of hockey stick-shaped molecule on the critical behavior at the Nematic to Isotropic and Smectic-A to Nematic phase transitions in octylcyanobiphenyl, Anish Chakraborty, Susanta Chakraborty and Malay Kumar Das, Phy. Rev. E, 91, 032503 (2015).
  12. Electro-optical properties of a new series of fluorinated antiferroelectric orthoconic liquid crystalline esters, Anamika Pramanik, Malay Kumar Das, Banani Das, Magdalena Żurowska and Roman Dąbrowski, Liquid Crystals, 42, 412(2015).
  13. Critical behavior of optical birefringence at the nematic–smectic A phase transition in a binary liquid crystal system, Journal of Molecular Liquids,199,415 (2014).
  14. Multifunctional additive performance of liquid crystal blended polydecylacrylate in lubricating oil, Petroleum Science and Technology, Pranab Ghosh, Mahua Upadhyay, Malay Kumar Das,Petroleum Science and Technology, 32, 2312 (2014).
  15. Determination of elastic constants of a binary system (7CPB+9.CN) showing nematic, induced smectic Ad and re-entrant nematic phases, Akhileshwar Prasad and Malay Kumar Das, Liquid Crystals, 41, 1261 (2014).
  16. Optical birefringence and its critical behavior in the Vicinity of nematic-smectic A phase transition in A binary mixture, Sudipta Kumar Sarkar, Purna Chandra Barman, Malay Kumar Das,  Physica B, 446, 80 (2014).
  17. Dielectric studies and critical behaviour in the vicinity of nematic-isotropic phase transition of a smectogenic binary mixture showing induced nematic phase,Sudipta Kumar Sarkar and Malay Kumar Das, Liquid Crystals, 41, 1410 (2014).
  18. Critical behaviour at the nematic-smectic A phase transition in a binary mixture showing induced nematic phase,Sudipta Kumar Sarkar and Malay Kumar Das,RSC Adv., 4, 19861 (2014).
  19. Critical behavior of dielectric permittivity in the vicinity of nematic–isotropic and smectic–nematic phase transitions in smectogenic binary mixtures, Sudipta Kumar Sarkar and Malay Kumar Das, Fluid Phase Equilibria, 365, 41 (2014).
  20. Studies on the additive performance of liquid crystal blended polyacrylate in lubricating oil, Pranab Ghosh, Mahua Upadhyay & Malay Kumar Das, Liquid Crystals, 41, 30(2014).
  21. Mesomorphic, optical, dielectric, elastic and viscous properties of multi-component isothiocyanato mixtures, A. Pramanik, B. Das, M. Das, K. Garbat, S. Urban and R. Dabrowski, Liquid Crystals, 40, 149 (2013).
  22. Optical, dielectric and visco-elastic properties of a few hockey stick-shaped liquid crystals with a lateral methyl group, Anish Chakraborty, Malay Kumar Das, Banani Das, Ute Baumeister, Wolfgang Weissflog, Journal of Materials Chemistry C, 1, 7418(2013).
  23. Determination Of Optical Birefringence And Orientational Order Parameter Of Four Members Of Alkyl Cyanobiphenyls Using A High Resolution Temperature Scanning Technique, Sudipta Kumar Sarkar, Purna Chandra Barman, Malay Kumar Das, IMPACT: International Journal of Research in Applied, Natural and Social Sciences, 1, 1 (2013).
  24. Dielectric Permittivity and Viscoelastic Measurements of Two Tricomponent Mixtures Consisting of Laterally Fluorinated Terphenyl Derivatives, S. Basak, P. Dasgupta, B. Das,  M.K. Das and R. Dabrowski, Acta Physica Polonica A123,714 (2013).
  25. Rotational viscosity measurements of bent-core nematogens, Anish Chakraborty, Malay Kumar Das, Banani Das, Anne Lehmann and Carsten Tschierske, Soft Matter, 9, 4273(2013).
  26. Dielectric and visco-elastic properties of laterally fluorinated liquid crystal single compounds and their mixture, P. Dasgupta, B. Das and M. K. Das, Liquid Crystals, 39, 1297(2012).
  27. A comparative study of the mesomorphic properties of fluoro-isothiocyanated and fluorinated terphenyl liquid crystals from birefringence, static dielectric permittivity, splay elastic constant and rotational viscosity measurements,  M. K. Das, A. Pramanik, B. Das, Ł. Szczuciñski and R. Dabrowski, J. Phys. D: Appl. Phys., 45,415304 (2012).
  28. Induced Smectic Phase in a Binary Mixture of Nematogens, Suchismita Datta Sarkar, TH. Kiranmala Devi, Basana Choudhury and Malay Kumar Das, Mol. Cryst. Liq. Cryst., 557, 134 (2012).
  29. Mesomorphic and structural properties of liquid crystal possessing a chiral  lactate unit,  Banani Das, Anamika Pramanik, Malay Kumar Das, Alexej Bubnov, Veˇra Hamplova,  Miroslav Kašpar, Journal of Molecular Structure, 1013,119(2012).
  30. Determination of the orientational order parameter of the homologous series of 4-cyanophenyl 4-alkylbenzoate (n.CN) by different methods, Malay Kumar Das, Gautam Sarkar, Banani Das, Ratan Rai and Neeraj Sinha, J. Phys.: Condens. Matter, 24, 115101 (2012).
  31. Phase transition and some physical properties of binary mixtures of two nematogenic compounds showing induced smectic phase, Suchismita Datta Sarkara, Basana Choudhury and Malay Kumar Das,Phase Transitions, 85, 85(2012).
  32. New hockey stick compounds with a lateral methyl group showing nematic, synclinic and anticlinic smectic C phases, A. Chakraborty, B. Das, M.K. Das, S. Findeisen-Tandel, M.-G. Tamb, U. Baumeister, H. Kresse and W. Weissflog, Liquid Crystals, 38, 1085(2011).
  33. Structural investigations of a non calamitic shaped liquid crystalline compound showing unusual phases, GautamSarkar,BananiDas, Malay Kumar Das, Ute Baumaister and WolfgangWeissflog. Mol. Cryst. Liq. Cryst., 540,188(2011).
  34. Static dielectric properties of two nematogenic compounds and their binary mixtures showing induced smectic Ad and re-entrant nematic phases, Akhileshwar Prasad and Malay Kumar Das, Phys. Scripta, 84, 015603(2011).
  35. Rotational viscosity measurement of a binary mixture showing both induced smectic and re-entrant nematic phases, Malay Kumar Das and AkhileswarPrasad, Mol. Cryst. Liq. Cryst., 540,162(2011).
  36. Physical properties of three liquid crystals with negative dielectric anisotropy from x-ray diffraction and optical birefringence measurements, P.Dasgupta, M.K.Das and B. Das, Mol. Cryst. Liq. Cryst., 540, 154(2011).
  37. Determination of Orientational Order Parameters of Two Tri-Component Mixtures from Optical Birefringence and X-Ray Diffraction Measurements S. Basak, P. Dasgupta, B. Das, M. K. Dasand R. Dabrowski, Acta Physica Polonica A, 120, 1037 (2011).
  38. Refractive index and orientational order parameter of a polar-polar binary system showing induced smectic Ad and re-entrant nematic phases, Akhileshwar Prasad and Malay Kumar Das, Phase Transitions, 83, 1072 (2010).
  39. Optical Birefringence Studies of a Binary Mixture with the nematic-smectic Ad- re-entrant nematic phase sequence, Akhileshwar Prasad and Malay Kumar Das,Journal of Physics: Condensed Matter, 22,195106 (2010).
  40. Orientational Order Parameters of a Binary Mixture Showing Both Induced Smectic and Re-entrant Nematic Phases,Akhileshwar Prasad and Malay Kumar Das, Phase Transitions, 82, 780 (2009).
  41. Determination of orientational order parameter of a binary mixture showing induced smectic Ad phase from magnetic susceptibility measurements. Prithwi Dev Roy, Banani Das and Malay Kumar Das, Journal of Physics: Condensed Matter, 21, 335108 (2009).
  42. Comparison of the Orientational Order Parameters Determined From X-Ray Diffraction and 13C NMR Studies of a Hockey Stick Shaped Compound, Gautam Sarkar, Malay Kumar Das, Ranjit Paul, Banani Das and Wolfgang Weissflog, Phase Transitions,82, 433(2009).
  43. Study of the physical properties of a mesogenic mixture showing induced smectic Adphase by refractive index, density and x-ray diffraction measurements, P.D. Roy, A. Prasad and M. K. Das, Journal of Physics: Condensed Matter, 21, 075106(2009).
  44. The Trapezoid Cylinder Phase: A New Mode of Self-Assembly in Liquid-Crystalline Soft Matter, Feng Liu, Bin Chen, Benjamin Glettner, Marko Prehm, Malay Kumar Das, Ute Baumeister, Xiangbing Zeng, Goran Ungar and Carsten Tschierske,J. Am. Chem. Soc., 130, 9666(2008).
  45. Dielectric permittivity studies of nematogenic compounds and their binary mixtures showing induced smectic Ad phase, Prithwi Dev Roy, Sukla Paul and Malay Kumar Das,Phase Transitions, 79,323(2006).
  46. Phase transition and physical properties of a binary mixture of bicyclohexane compounds, II: X-ray Diffraction Measurements, Malay Kumar Das, Prithwi Dev Roy, Sukla Paul, Ranjit Paul and Banani Das,Mol. Cryst. Liq. Cryst., 457, 55 (2006).
  47. Phase transition and physical properties of a binary mixture of bicyclohexane compounds, I: Refractive index measurements, Prithwi Dev Roy, Malay Kumar, Das, Sukla Paul, Ranjit Paul and Banani Das, Mol. Cryst. Liq. Cryst.,457, 43 (2006).
  48. Carbohydrate Rod Conjugates: Ternary Rod-Coil Molecules forming complex Liquid Crystal Structures,Bin Chen, Ute Baumeister, Gerhard Pelzl, Malay Kumar Das, Xiangbing Zeng,§Goran Ungar, and Carsten Tschierske,  J. Am.Chem. Soc., 127, 16578 (2005).
  49. Liquid Crystalline Bolaamphiphiles with Semiperfluorinated Lateral Chains: Competition  between Layerlike and Honeycomb-Like Organization, Xiaohong Cheng, Malay Kumar Das, Ute Baumeister, Siegmar Diele, and Carsten Tschierske, J. Am. Chem. Soc., 126, 12930(2004).
  50. A new type of square columnar liquid crystalline phases formed by facial amphiphilic triblock molecules, Bin Chen, Ute Baumeister, Siegmar Diele, Malay Kumar Das, Xiangbing Zeng,  Goran Ungar, and Carsten Tschierske,  J. Am.Chem. Soc., 126, 8608 (2004).
  51. Calamitic bolaamphiphiles with (semi)perfluorinated lateral chain: Polyphilic block molecules with new liquid crystalline phase structures. Xiaohong Cheng, Marko Prehm, Malay Kumar Das, Jens Kain, Siegmar Diele, Dag Leine, Alfred Blume and Carsten Tschierske. J. Am. Chem. Soc., 125, 10977 (2003).
  52. Correlated layer structure- a novel type of Liquid Crystalline Phases with 2D-lattice, MarcoPrehm, SiegmarDiele, Malay Kr. Das and Carsten Tschierske,J. Am. Chem. Soc., 125, 614 (2003).
  53. Novel liquid crystalline phases with layer–like organization, Xiaohong Cheng, Malay Kumar Das, Siegmar Diele and Carsten TschierskeAngew. Chem., 114, 4203(2002).
  54. New liquid crystalline phases with layer like organization. Marko Prehm, Xiao Hong Cheng, Seigmar Diele, Malay Kumar Das and Carsten Tschierske, J. Am Chem. Soc., 124, 12072 (2002).
  55. The influence of semiperfluorinated chains on the liquid crystalline properties of amphiphilic polyols: Novel materials with thermotropic lamellar, columnar, bicontinuous cubic and micellar cubic mesophases. Xiaohong Cheng, Malay Kumar Das, Siegmar Diele and Carsten Tschierske, Langmuir, 18, 6521 (2002).
  56. A thermotropic mesophase comprised of closed micellar aggregates of the normal type. Petra Fuchs, Carsten Tschierske, Klaus Raith, Malay Kumar Das and Siegmar Diele, Angew. Chem. Int. Ed. 2002, 41, 628 (2002).
  57. Orientational order parameter of a binary liquid crystal mixtures showing induced smectic phase. P. D. Roy, N. K. Pradhan and M. K. Das, Mol. Cryst. and Liq. Cryst., 365, 593(2001).
  58. Phase diagram, density and optical studies on binary mixture of a cyanobiphenyl (11OCB) and a benzoate ester (ME 6.O5) showing enhanced smectic phase,  P. D. Roy, M. K. Das and R. Paul, Mol. Cryst. and Liq. Cryst., 365, 607(2001).
  59. Temperature variation of transverse co-relation length in SmC and N phases of a liquid crystal from X-ray and Neutron diffraction studies. . M. K. Das, B. Adhikari, R. Paul, S. Paul, K. Usha Deniz  and S. K. Paranjpe, Mol.  Cryst. Liq. Cryst., 330, 1 (1999).
  60. Analysis of x-ray diffraction intensities of a mesogenic mixture exhibiting induced smectic phase. M. K.Das and R. Paul., Mol. Cryst. Liq. Cryst., 299, 477 (1997).
  61. X-ray diffraction studies in solid and mesomorphic phases of four members of alkoxy cyanobiphenyls: odd-even effect. . M. K. Das, S. Paul and R. Paul, Mol. Cryst. Liq. Cryst., 264, 89 (1995).
  62. Phase transition and physical properties of a binary mixture showing enhanced smectic phase.  M. K. Das, B. Jha and R. Paul, Mol. Cryst. Liq. Cryst., 261, 95 (1995).
  63. Calculation of layer thickness in smectic A phase of binary mixtures of terminal polar + non-polar mesogens. M. K. Das and R. Paul, Mol. Cryst. Liq. Cryst., 260, 477(1995).
  64. Determination of bend to splay elastic constant ratio (K3/K1) of several nematogens and applicability of spherocylindrical model. M. K. Das and R. Paul, Mol. Cryst. Liq. Cryst., 259, 13 (1995).
  65. Small angle x-ray diffraction studies of an ester/biphenyl mixture (5CB/ME5O.5) showing an injected smectic phase. M. K. Das, R. Paul and D. A. Dunmur, Mol. Cryst. Liq. Cryst., 258, 239 (1995).
  66. Study of the physical properties of an ester/biphenyl mixture exhibiting injected smectic phase by small angle x-ray diffraction. M. K. Das and R. Paul, Phase Transitions, 48, 255 (1994).
  67. Optical birefringence, density and order parameter of an ester-biphenyl mixture exhibiting an induced smectic phase. M. K. Das and R. Paul, Phase Transitions, 46, 185 (1994).
  68. Orientational order parameters of binary mixtures of 8OCB + 6OCB showing re-entrant nematic phase. Malay Kumar Das and Ranjit Paul, Mol. Cryst. Liq. Cryst., 239, 107 (1994).