†††††

1. Studies of Molecular Orientation and Arrangement for Ferrielectric Liquid Crystal by Phase Transitions, S. W. Kim, H. Choi, J. H. Song, J. H. Kim, S. Kumar, J. W. Choi, Y. B. Kim, and S. T. Shin, J. Inst. Sci. and Tech. 7, 81 (1999).

2. A Simple and Material Independent Method for the Determination of Anchoring Properties of Rubbed Polyimide Surfaces, B. R. Acharya, J.-H. Kim, and S. Kumar, Japn. J. Appl. Phys. Lett. 38, 1538 (1999).

3. A Liquid Crystal Independent Determination of Anchoring Properties on Rubbed Polyimide Surfaces, B. R. Acharya, J.-H. Kim, and S. Kumar, Phys. Rev. E 60, 6841 (1999).

4. Phase Separated Composite Films of Liquid Crystals, V. Vorflusev, J. H. Kim, and S. Kumar, Pramana- J. Phys., 53, 121 (1999).

5. Time Evolution of the Structure of Confined Sm-C* Films, L. J. Martinez-Miranda, Y. Shi, and S. Kumar, Mol. Cryst. Liq. Cryst. 326, 41 (1999).

6. Flexible Displays Prepared Using Phase Separated Composite Organic Films of Liquid Crystals, J. H. Kim, V. Vorflusev, and S. Kumar, SID Digest 30, 880 (1999).

7. Thermally Stable LC Alignment on Polyimide Films Exposed to UV During Imidization, J. H. Kim, B. Acharya, and S. Kumar, SID Digest 30, 312 (1999).

8. Phase Separated Composite Films for Liquid Crystal Displays, V. Vorflusev, and S. Kumar, Science 283, 1903 (1999). Formed the basis of the award by the Korean Ministry of Science and Technology.

9. Interferometric Optical Modulation by Surface Droplets of Liquid Crystal, V. Loiko, A. Konkolovich, V. Vorflusev, and S. Kumar, Proceedings of 7th Intl. Symp. on Advanced Display Technologies, p. 171 (1998).

10. Ferroelectric and Antiferroelectric LC Displays Based on Phase Separated Film Method, V. Vorflusev and S. Kumar, Proceedings of 7th Intl. Symp. on Advanced Display Technologies, p. 107 (1998).

11. Photocontrol of Smectic Spacing, W. R. Folks, S. Keast, T. A. Krentsel, B. Zalar, H. Zeng, Y. A. Reznikov, M. Neubert, S. Kumar, D. Finotello, and O. D. Lavrentovich, Mol. Cryst. Liq. Cryst. 320, 77-88, (1998).

12. A Novel Method for Liquid Crystal Alignment Using in-situ Ultra-violet Exposure During Imidization of Polyimide, J.-H. Kim, B. R. Acharya, S. Kumar, and K.-R. Ha, Appl. Phys. Lett. 73, 3372 (1998).

13. A Study of Alignment and Electro-optical Characteristic for Antiferroelectric Liquid Crystal Mode, S.W. Kim, H. Choi, J.H. Kim, S. Kumar, J.W. Choi, Y.B. Kim, and S. T. Shin, KLCC'98, 1, 121 (1998).

14. Calorimetric and X-ray Diffraction Studies of Critical Behavior at the Nematic to Lamellar Phase Transition, S. T. Shin, K. H. Kim, and S. Kumar, Korea Poly. J. 6, 318 (1998).

15. Multistable Antiferroelectric Liquid Crystal Optical Modulator, V. Vorflusev and S. Kumar, App. Phys. Lett. 73, 3211 (1998).

16. Electro-optical Effects in Phase Separated Composite Films of Ferroelectric Liquid Crystals and Polymer, V. Vorflusev and S. Kumar, Proceedings of the 5th International Conference on Composites Engineering, July 5-11, pp. 499-500 (1998).

17. Electro-optical Properties of Phase Separated Composite Organic Films of Ferroelectric Liquid Crystals, V. Vorflusev and S. Kumar, SID Digest 29, 786 (1998).

18. Bilaterally Linked Mesogens in Main-Chain Polymer with Biaxial Fluctuations in Nematic Phase, T.-H. Tong, A. Primak, S. Kumar, and L.-C. Chien, Macromolecules 31, 3537 (1998).

19. New Bilaterally Linked Mesogens in Main-Chain Polymer with Biaxial Fluctuations in Nematic Phase, T.-H. Tong, A. Primak, S. Kumar, and L.-C. Chien, Polymer Reprints 39, 252 (1998).

20. Alignment of liquid crystals on polyimide films exposed to ultraviolet light, J.-H. Kim, S. Kumar, S.-D. Lee, Phys. Rev. E 57, 5644 (1998).

21. Critical Behavior at the Nematic to Lamellar Phase Transition: A Synchrotron X-ray Scattering Study, S. T. Shin, J. D. Brock, M. Sutton, J. D. Litster, and S. Kumar, Phys. Rev. E (Rapid Comm.) 57, R3711 (1998).

22. Electro-optical Properties of Thin PDFLC Films Prepared by TIPS and PIPS Methods, V. Vorflusev and S. Kumar, Ferroelectrics 213, 117 (1998).

23. Light-induced Instabilities in Layered Liquid Crystals, W. R. Folks, S. Keast, T. A. Krentsel, B. Zalar, H. Zeng, Y. A. Reznikov, M. Neubert, S. Kumar, D. Finotello, and O. D. Lavrentovich, Proceedings of Japan Liq. Cryst. Soc. Meeting, Tokyo, Nov. 19, (1997).

24. Bilaterally Linked Mesogens in Main-Chain Polymer with Exhibition of Biaxial Fluctuations in Nematic Phase, T.-H. Tong, A. Primak, S. Kumar, and L.-C. Chien, ALCOM Technical Reports, IX, 79 (1997).

25. A Small Angle Neutron Scattering of the Effects of Simple and Oscillatory Shear on the CsPFO/H2O System, J. T. Mang, and S. Kumar, Phase Transitions in Complex Fluids, p.297, editors P. Toledano and A. M. F. Neto, World Scientific (Singapore) (1997).

26. Control of Nematic Director Orientation by Exposing Rubbed Polyimide Films to Linearly Polarized UV Light, J.-H. Kim, Y. Shi, S. Kumar, and S.-D. Lee, Appl. Phys. Lett. 71, 3162 (1997).

27. High-Resolution X-ray Diffraction Study of Polymorphism in Polar Liquid Crystals, Y. Shi, G. Nounesis, C. W. Garland, and S. Kumar, Phys. Rev. E 56, 5575 (1997).

28. In-Situ X-ray Measurements of Light Controlled Layer Spacing in a Smectic-A Liquid Crystal, T. A. Krentsel, O. D. Lavrentovich, and S. Kumar, Mol. Cryst. Liq. Cryst. 304, 463 -470 (1997).

29. Lyotropic Liquid Crystal under Simple and Oscillatory Shear, J. T. Mang, S. Kumar, and B. Hammouda, Mol. Cryst. Liq. Cryst. 303, 255 (1997).

30. A Comparative Structural Study if Three Perspective Longitudinal Ferroelectric Smectic Liquid Crystals, Y. Shi, J. T. Mang, S. Kumar, and E. T. Samulski, Mol. Cryst. Liq. Cryst. 302, 47 (1997).

31. X-ray Scattering Study of Smectic Ordering Partially Confined between Free Surface and Micro-grooved Substrates, Y. Shi, L. J. Martinez-Miranda, and S. Kumar, Mol. Cryst. Liq. Cryst. 301, 73 (1997).

32. Bilayer Smectic Order in a Mixture of Polyphilic Liquid Crystals, Y. Shi, F. G. Tournilhac, and S. Kumar, Phys. Rev. E55, 4382 (1997).

33. X-ray Characterization of Photoalignment Layers, Y. Shi, M. Schadt, and S. Kumar, ALCOM Technical Reports, VIII, 12 (1996).

34. Bistable Nonlinear Optical Activity in a Smectic-A Liquid Crystal, H. Wang, M. Y. Jin, R. C. Jarnagin, E. T. Samulski, T. J. Bunning, W. Adams, B. Cull, Y. Shi, and S. Kumar, Letters to Nature, 384, 244 (1996).

35. Onset and Evolution of the Tilted Smectic Antiphase in a Polar Liquid-Crystal Binary Mixture, Y. Shi, G. Nounesis, and S. Kumar, Phys. Rev. E54, 1570, (1996).

36. Melting of Phospholipid Tubules, G. Nounesis, G. Nounesis, B. R. Ratna, S. T. Shin, R. S. Flugel, S. N. Sprunt, A. Singh, J. D. Litster, R. Shashidhar, and S. Kumar, Phys. Rev. Lett., 76, 3650 (1996).

37. Anisotropic Surface Morphology of PVMC and PDA Thins Films Induced by Linear Photopolymerization, B. Cull, Y. Shi, S. Kumar, and M. Schadt, Phys. Rev. E 53, 3777 (1996).

38. Heat Capacity and X-ray Diffraction Study of Phase Transitions in Surfactant Solutions, S. Kumar and A. Saupe, 39th Ann. Rep. on Res. Sponsored by The Petroleum Research Fund, 39, 263 (1995).

39. Shear Induced Orientation of Discotic Liquid Crystal Micelles, B. Hammouda, J. T. Mang, and S. Kumar, Phys. Rev. E 51, 6282 (1995).

40. A True Incommensurate Phase in Mixtures of Two Polar Liquid Crystalline Materials, J. T. Mang, B. Cull, Y. Shi, P. Patel, and S. Kumar, Phys. Rev. Lett. 74, 4241 (1995).

41. AC Calorimetric Studies of Hex-B Cryst.-B and Cryst.-BHex-B Phase Transitions in Hydrogen Bonded Compounds, G. Iannachhione, E. Gorecka. D. Finotello, S. Kumar, and W. Pyzuk, Phys. Rev. E 51, 3346 (1995).

42. X-ray Reflectivity Study of Interface Roughness, Structure, and Morphology of Alignment Layers and Thin Liquid Crystal Films, B. Cull, Y. Shi, and S. Kumar, Phys. Rev. E 51, 526 (1995).

43. Discotic Micellar Nematic and Lamellar Phase Under Shear Flow, J. T. Mang, B. Hammouda, and S. Kumar, Europhys. Lett. 28, 489, (1994).

44. Achiral Ferroelectric Smectic or Smectic-Ad Phase?, Y Shi and S. Kumar, ALCOM Technical Reports VI, 229 (1994).

45. Surface Induced Smectic Discrete Ordering in The Isotropic Phase of 12CB Confined in Cylindrical Pores, G. S. Iannacchione, J. T. Mang, S. Kumar, and D. Finotello, Phys. Rev. Lett. 73, 2708, (1994).

46. X-ray Studies of Hexatic-B Phase in Novel Liquid Crystals with Full Cryst-B-Hex-B-Sm-A Phase Sequence, E. Gorecka, L. Chen, A. Krowczynski, W. Pyzuk, and S. Kumar, Phys. Rev. E 50, 2863 (1994).

47. Bistable Switching in Polymer Dispersed Ferroelectric Liquid Crystal Displays, P. Patel, D. Chu, J. W. West, and S. Kumar, SID 94 Digest, 25, 845, (1994).

48. High-Precision Heat Capacity and High-Resolution X-ray Diffraction Study of Phase Transitions in Surfactant Solutions, S. Kumar and A. Saupe, 38th Ann. Rep. on Res. Sponsored by The Petroleum Research Fund, 38, 469 (1994)

49. Experimental Observation of a Transition Between Two Uniaxial Nematic Liquid Crystal Phases, G. Nounesis, S. Kumar, S. Pfeiffer, R. Shashidhar, and C. W. Garland, Phys. Rev. Lett., 73, 565 (1994).

50. Effect of Salt on the Phase Diagram of Two Binary Lyotropic Liquid Crystalline Solutions, B. Cull, M. Heino, S. H. Lee, S. Kumar, S. S. Keast, and M. E. Neubert, Liq. Cryst. 17, 507 (1994).

51. The Case of Missing Incommensurate Smectic-A phases, P. Patel, S. Kumar, and P. Ukleja, Invited Article, Liq. Cryst. 16, 351 (1994).

52. Morphology and Ordering in Thin Liquid Crystal Films on Glass, Y. Shi, B. Cull, and S. Kumar, Phys. Rev. Lett. 71, 2773 (1993).

53. SANS Study of Phase Transitions in Side-Chain Polymer Liquid Crystals, J. T. Mang, S. Kumar, and T. P. Rieker, LANSCE Annual Experiment Reports, Page 110 (1993).

54. Correct Phase Diagram of Liquid Crystal reported to exhibit the (nonexistent) incommensurate smectic-A Phases, P. Patel, S. Kumar, Europhys. Lett. 23, 135 (1993).

55. Phase Diagram of 8OCB + DB7OCN system and Absence of Incommensurate Smectic-A Phase, P. Patel, L. Chen, and S. Kumar, Phys. Rev. E 47, 2643 (1993).

56. Recent Advances in Frustrated Smectic Liquid Crystals, S. Kumar and P. Patel, Condensed Matter News 2, 9 (1993).

57. Smectic Layer Orientation in Confined Geometries, J. T. Mang, K. Sakamoto, and S. Kumar, Mol. Cryst. Liq. Cryst. 223,133 (1992).

58. Critical Behavior at the Nematic to Smectic-A Phase Transition in a Side Chain Polymer Liquid Crystal, J. T. Mang, T. P. Rieker, L. Chen, P. Patel, V. Surendranath, and S. Kumar, Polym. Mat. Sci. Engg. 67, 376 (1992).

59. Nonexistence of Incommensurate Smectic-A Phases in Binary Mixtures of 8OBCAB and DB8OCN, P. Patel, S. Sabol Keast, M. E. Neubert, and S. Kumar, Phys. Rev. Lett. 69, 301 (1992).

60. Phase Transitions in Side-Chain Polymer Liquid Crystals, J. T. Mang, S. Kumar, and T. P. Rieker, LANSCE Annual Experiment Reports, Page 101 (1992).

61. Confinement Effects Induced by Solubilized Polymer on the Micellar Nematic-Lamellar Transition, M. R. Kuzma, W. Wedler, A. Saupe, S. T. Shin, and S. Kumar, Phys. Rev. Lett. 68, 3436 (1992).

62. High-Precision Heat-Capacity Study of Phase Transitions in a Lyotropic Liquid Crystal, S.T. Shin, S. Sabol Keast, M.E. Neubert, D. Finotello, and S. Kumar, Phys. Rev., A 45, 8683 (1992).

63. Calorimetric Study of Blue Phases of Chiral Liquid Crystal CE4, S. T. Shin, G. Iannacchione, R. Folks, D. Finotello, and S. Kumar, ALCOM Technical Reports III, 125 (1992).

64. Incommensurate Smectic Phases?. P. Patel, Li Chen, S. Sabol Keast, M. E. Neubert, and S. Kumar, Liquid Crystals Today, 2, 3, (1992).

65. Smectic Layer Orientation During Switching of Surface Stabilized Cells Filled with Fluorinated Ferroelectric Liquid Crystals, L. Chen, S. Kumar, M. Tristani-Kandra, and E. P. Janulis, J. App. Phys. 71, 664 (1992).

66. Critical Behavior at the Nematic to Smectic-A Transition in a Non-polar Liquid Crystal with a Wide Nematic Range, L. Chen, J.D. Brock, J. Huang, and S. Kumar, Phys. Rev. Lett. 67, 2037 (1991).

67. Absence of the Incommensurate Sm-A Phase in DB7OCN + 8OCB Mixtures, S. Kumar, L. Chen, and V. Surendranath, Phys. Rev. Lett. 67, 322 (1991).

68. Orientation of Sm-A and Sm-C* Layers in cylindrical Pores, J. T. Mang and S, Kumar, ALCOM Technical Reports I, 367 (1991).

69. Microcalorimetric Study of Nematic to Neat Soap and Nematic to Isotropic Phase Transitions in a Lyotropic Liquid Crystal, S.T. Shin and S. Kumar, Phys. Rev. Lett. 66, 1062 (1991).

70. Smectic Layer Orientation During Switching of SSFLC Cells, S. Kumar, Technical Report submitted to 3M Corporation, (March 1990).

71. Phase Transitions in Micellar Liquid Crystals, S. Kumar, J. Brock, M. Sutton, and J. D. Litster, Surfactant in Solutions, Vol. 8, 35-44 (ed. K.L. Mittal), Plenum Press, NY (1989).

72. Temperature Dependence of Molecular Tilt Angle and Rotatory Power in a Ferroelectric Liquid Crystal with Polarization Sign Reversal, I. Musenvic, I. Drevensek, R. Blinc, S. Kumar, and J. W. Doane, Mol. Cryst. Liq. Cryst. 172, 217 (1989).

73. The Synthesis of Ferroelectric Liquid Crystal Materials, J.C. Liang and S. Kumar, Mol. Cryst. Liq. Cryst. 159, 115-125 (1988).

74. Effect of Chiral Dopant Concentration on the Time Response of a Twisted Nematic Cell, S. Kumar, Mol. Cryst. Liq. Cryst. 144, 127 (1987).

75. The Synthesis and Liquid Crystal Behavior of p-Benzotrifluoride Compounds I, J.C.Liang and S. Kumar, Mol. Cryst. Liq. Cryst. 142, 77 (1987).

76. High Resolution X-ray Scattering from the Lyotropic Liquid Crystal Cesium Perfluoro-Octanoate, J. D. Brock, S. Kumar, J.D. Litster, and M. Sutton, Stanford Synchrotron Research Laboratory Annual Report (1986).

77. Pressure Dependence of the Nematic-to-Isotropic Transition in the Lyotropic Liquid Crystal Perfluoro-Octanoate, M.R. Fisch, S. Kumar, and J.D. Litster, Phys. Rev. Lett. 57, 2830 (1986).

78. Approach to a Second Order Nematic-Isotropic Transition in a Lyotropic Liquid Crystal, C. Rosenblatt, S. Kumar, and J.D. Litster, Phys. Rev. A 29, 1010 (1984).

79. Pretransitional Effects in the Isotropic Phase of a Lyotropic Nematic Liquid Crystal, S. Kumar, J.D. Litster, and C. Rosenblatt, Phys. Rev. A 28, 1980 (1983).

80. Orientational Fluctuations of a Lyotropic Nematic Liquid Crystal Measured by Quasi-elastic Light Scattering, S. Kumar, L. J. Yu, and J.D. Litster, Phys. Rev. Lett. 50, 1672 (1983).

81. Positional Order in the Smectic-G, -F and -C Phases of HBHA, S. Kumar, J. Phys. (Paris), 44, 123 (1983).

82. On the Nature of Smectic-C Phase, S. Kumar and T.L. Polgreen, in Liquid Crystals and Ordered Fluids, 4, 1131, Edited by Johnson and Porter, Plenum Press, New York (1982).

83. High Resolution A.C. Specific-Heat and X-ray Investigations of the Smectic-F to -H Transition of HBHA, S. Kumar, J.D. LeGrange, J.M. Mochel, and W.L. McMillan, Phys. Rev. A 25, 2258 (1982).

84. High-Resolution X-ray Measurements of Smectic Phases of TBAAs, S. Kumar, Phys. Rev. A 23, 3207 (1981).

85. Disk-like Mesogens, S. Chandrasekhar, B.K. Sadashiva, K.A. Suresh, N.V. Madhusudana, S. Kumar, R. Shashidhar, and G. Venkatesh, J. Phys. (Paris) Colloq. 40, C3-120 (1979).

Publications: 1999-earlier