Publications

Recent Publications

Invited Talks and Presentation List

Patents Awarded/Filed:

1. Three dimensional display system using quantum dots/rods and liquid crystal , S. Kumar

Date of disclosure: Feb. 5 (2013).

2. U.S. Patent No. 7,604,850; Oct. 20 (2009)

Biaxial Nematic Liquid Crystal Electro-optical Devices, S. Kumar

3. US Patent: No. 7,355,668, April 8 (2008).

Polymer Enhanced LC Devices For Flexible Plastic Displays

Qingbing Wang and S. Kumar

4. U. S. Patent No. 5,321,533; June 14, 1994

Polymer Dispersed Ferroelectric Smectic Liquid Crystal Displays, S. Kumar

5. U. S. Patent No. 5,530,566; June 25, 1996

Polymer Dispersed Ferroelectric Smectic Liquid Crystal Formed by Inducing a Force During Phase Separation, S. Kumar

6. U.S. Patent No. 5,949,508; September 7, 1999.

Phase Separated Composite Organic Films and Method for Manufacture Thereof, S. Kumar and V. Vorflusev.

7. U.S. Patent No. 5,936,691; August 10, 1999

Method of Preparing Alignment Layer for use in Liquid Crystal Devices Using in-situ Ultraviolet Exposure, S. Kumar and J.-H. Kim.

8. European Patent No. 0665279; August 29, 2001

Polymer Dispersed Ferroelectric Smectic Liquid Crystal Technology, S. Kumar.

9. World Patent Appl. No. WO 01/18594

Fabrication of Aligned LC Cell/Film by Simultaneous Alignment and Phase Separation, S. Kumar, L.C. Chien, J.-H. Kim

10. US Patent No. 6989587, Sept. 6, 2005

Fabrication of Aligned LC Cell/Film by Simultaneous Alignment and Phase Separation, S. Kumar, L.C. Chien, J.-H. Kim

11. US Patent: No. 6864931

Electrically Controllable Liquid Crystal Miscrostructures, J.-H. Kim and S. Kumar.

European, Japan, China patents pending.

12. US Patent: No. 7075613

Polymer Enhanced LC Devices For Flexible Plastic Displays

Qing bing Wang and S. Kumar

13. A Method of Achieving Homeotropic Alignment for LC Display Devices,

S. Kumar, B. Acharya, and H.C. Choi., US Patent application filed August, (2002).

14. Electron Beam Alignment of Liquid Crystals

S. Kumar, C. Vargas-Aburto, and Q.-B. Wang, Application filed July (2004).

15. Biaxial Nematic Liquid Crystal Display and Electro-optical Devices,

S. Kumar, Provisional application filed Aug 24, 2005; Ser. No. 60/711,046

Patents and Trade Secrets

Conference Presentations

Publications, Talks, Conferences

1. Emergent optical phononic modes upon nanoscale mesogenic phase transitions, Dima Bolmatov, Mikhail Zhernenkov, Lewis Sharpnack, Dena M. Agra-Kooijman, Satyendra Kumar, Alexey Suvorov, Ronald Pindak, Yong Q. Cai, and Alessandro Cunsolo, Nano Letters, May 2017, DOI: 10.1021/acs.nanolett.7b01324.

2. The oblique chiral nematic phase in calamitic bimesogens, D. M. Agra-Kooijman, G. Singh, Michael R. Fisch, M. R. Vengatesan, J.-K. Song and S. Kumar, Liq. Cryst. 44, 191 (2017).

3. Tunable polarised flourescence of quantum dots doped nematic liquid crystals, G. Singh, Michael R. Fisch, and S. Kumar, Liq. Cryst., 44, 444 (2017).

4. Mesogen-Functionalized Graphene-Embedded Self-Organized Chiral Superstructures for Adaptive Window, L. Wang, H. K. Bisoyi, Z. Zheng, Karla G. Gutierrez-Cuevas, G. Singh, S. Kumar, T. J. Bunnning, and Q. Li, Materials Today (2017). http://dx.doi.org/10.1016/j.mattod.2017.04.028

5. Morphological Anisotropy of Nano-Dimensional Arsenic triSulfide Glass Films and Liquid Crystal Photoalignment, L Sharpnack, Miri G. Kirzhner, Deña M. Agra-Kooijman, Ashok Chaudhary, T. Arun Kumar, M. Klebanov, N. Sheremet, Yu Reznikov, I. Abdulhalim, and Satyendra Kumar, Mol. Cryst. Liq.Cryst, 647, 307 (2017).

6. Phase behavior and characterization of heptamethyltrisiloxane-based de Vries smectic liquid crystal by electro-optics, x rays, and dielectric spectroscopy, S. P. Sreenilayam, D. M. Agra-Kooijman, V. P. Panov, V. Swaminathan, J. K. Vij, Yu. P. Panarin, A. Kocot, A. Panov, D. Rodriguez-Lojo, P. J. Stevenson, M. R. Fisch, and S. Kumar, Phys. Rev. E 95, 032701 (2017).

7. Liquid crystal photoalignment on As2S3 chalcogenide thin films, N. V. Sheremet, L Sharpnack, M Gelbaor-Kirzhner, D M Agra-Kooijman, A Chaudhary, T A Kumar, M Klebanov, I Abdulhalim, S Kumar and Y. A Reznikov J. Phys. D.: Appl. Phys. 50, 065306 (2017).

1. S. Kumar, Invited Talk, The role of surface morphology in photo-alignment of liquid crystal on polymer and chalcogenide glass films, 1^st International Conference on Photoalignment and Photopatterning in Soft Materials: Basic Understanding and Applications (PhoSM2014), Hong Kong University of Science and Technology, Nov 29 - Dec 2 (2014).

2. S. Kumar, Invited Talk, Structure and phase diagram of a twist-bent nematic system, 21^st National Conference on Liquid Crystals, VSSD College, CSJM University, Kanpur, India, Nov. 9-12, (2014).

3. S. Kumar, Plenary Talk, Unraveling the Mystery of de Vries Smectic Phases, 25th ILCC, Trinity College, Dublin, Ireland (2014).

4. D. M. Agra-Kooijman, G. Singh, H.-G. Yoon, and S. Kumar, Invited Talk, de Vries Smectics: Volcano- or Sugarloaf-like Molecular Distribution Function?, 20th National Conference on Liquid Crystals, Manipal University, Manipal, India, December 15-18 (2013).

5. D. M. Agra-Kooijman, L. Joshi, G. Singh, S.W. Kang, P. J. Collings, and S. Kumar, Invited Talk, Molecular Assembly and Ordering in Aqueous Solutions of Chromonic Mesogens, Optics of Liquid Crystals 2013, Honolulu, Hawaii, Sept 29 – Oct 4 (2013).

25th International Liquid Crystal Conference, Dublin, Ireland, June 29-July 4 (2014)

1. Bilayer gelation in nanoparticle-doped nCB-homologues, Alexander Lorenz, Dena Mae Agra-Kooijman, Natalie Zimmermann, Heinz Kitzerow, Dean Evans, Satyen Kumar. (Oral)

2. The Orientational Distribution Function of de Vries Smectics, D. M. Agra-Kooijman, G. Singh, L. Sharpnack, Satyen Kumar. (Poster).

3. Strain Dependent Relaxation of Main-Chain Liquid Crystal Elastomer, D. M. Agra-Kooijman, S. Dey, W. Ren, P. McMullan, A. Griffin, and Satyen Kumar (Oral)

Others

1. Nanoparticle induced smectic phase with unusual layer spacing in 4-cyano-4’-pentrybiphenyl and several homologues, A. Lorenz, N. Zmmermann, S. Kumar, D.R. Evans, and H.-S. Kitzerow, 46th Biennial Meeting of the German Colloid Society, Paderborn, Germany, Sept. 23-25 (2013).

2. Adsorbed liquid crystal multilayers on nanoparticles and unusual layer spacing in 5CB, A. Lorenz, Z. Zimmerman, S. Kumar, D.R. Evans, G. Cook, and H.S. Kitzerow, Presented at the 2013 Annual Meeting of the British LC Society, Selwyn College, Cambridge, UK, March 25-27(2013).

3. Multilayers with unusual layer spacing in nanoparticle doped 5CB, A. Lorenz, N. Zimmerman, S. Kumar, D. R. Evans, G. Cook, and H. S. Kitzerow, Presented at the German Liquid Crystal Society meeting, Paderborn, Spring (2013).

4. Synthesis of Bent-Core Liquid Crystals to Induce Biaxiality in the Nematic Phase, Q. Li, Y. Wang, H.K. Bisoyi, H.-G. Yoon, and S. Kumar, Presented at the 244th ACS Meeting, Philadelphia, Aug. 19 - 23 (2012).

5. Liquid Crystal Porphyrin Thin Film for Self-Organizing Organic Photovoltaics, C. Xue, X. Zhou, S. Kumar, and Q. Li, Presented at the 2012 UCEAO Conference on Securing Ohio’s Energy Future, Columbus, OH, April 2,3, (2012).

24th International Liquid Crystal Conference, Mainz, Germany, August 19-24 (2012)

1. Doping a eutectic mixture of 8CB and 8OCB with harvested ferroelectric nanoparticles, A. Lorentz, S. Kumar, D. R. Evans, G. Cook, M. Fernandez Martinez, T. Narayanan, and H.-S. Kitzerow.

2. Alignment of Calamitic and Bent-Core Nematic Liquid Crystals on Substrates with Rubbed Polyimide Films, H.-G. Yoon, S.-W. Kang, M. Lehmann, J. O. Park, M. Srinivasarao, and S. Kumar.

3. Structure of Nematic and Columnar Chromonic Mesophases of Disodium Cromoglycate: a New Perspectives, DM. Agra-Kooijman, G. Singh, P.J. Collings, and S. Kumar.

COLLOQUIUM AND SEMINARS

2012-2016