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CdS nanowires encapsulated liquid crystal in-plane switching of LCD device

  • Kaushik Pal
  • M. Abd Elkodous
  • M. L. N. Madhu Mohan
Article

Abstract

Well-defined ultra-thin ‘wire’ like cadmium sulfide (CdS) nanostructures have been synthesized by applying simple cost-effective hydrothermal route. The content of nanostructures modifies the nature of surface interaction between two liquid crystal (LC) components as revealed by optical and electrical investigation. Those synthesized nanowires have an average diameter of about 7–10 nm and length up to several micrometers region. A possible mechanism has been proposed and the addition of cataionic surfactant cetyltrimethylammonium bromide (CTAB) into the two mixed-solvents would play an important role on the growth dynamics of the desired product. Those CdS-nanowires dispersing LC was found a remarkable signature on the nucleation and provides a more fundamental approach to modify the crystallographic configuration of host nanostructures. Polarizing optical microscopy (POM) revealed temperature dependent various phases appearence in different textural patterns are the proof the significant influence of CdS nanomaterials complete homogenious dispersion with host LC-matrix. Most observed phenomena are discussed in terms of a new smectic ordering labeled as ‘Smectic X*’, which is sandwiched between the traditional ‘Nematic’ and convectional ‘Smectic C*’ phases. This feature article deals with dielectric relaxations, rotational viscosity, spontaneous polarization in the smectic C phase have been analyzed. A range of remarkable responses of the capacitance with voltage in a Preisach model, fourfold dipolar species in hybrid nanocomposites matrix as well as bi-stable DC switching also offering recent breakthroughs in next generation smart display (LCD) and novel switchable device.

Notes

Acknowledgements

The author Dr. Kaushik Pal is grateful to his associate colleagues & doctoral research scholars at Wuhan University, China. Especially, Dr. Pal, owe to his sincere thanks to associate colleagues included Bachelor/Masters/Ph.D. students, spectroscopy/electron microscopy operators, as well as entire team of research scholars are also gratefully acknowledged during “Visiting Scientist” associate ship at CNU, South Korea. We are honor to Prof. Mohan’s co-workers of the Liquid Crystals Research Laboratory at Bannari Amman Institute of Technology, Sathyamangalam encouraging liquid crystal preparation. Sincere ‘Thanks’ goes to Dean (Research), at BIHER Chennai (India) for providing Dr. Pal to develope the excellence of research foundation associated with existing Nanotechnology laboratory. The research scholars from Niel University, Egypt are gratefully acknowledged for giving scopes to develop research ideas and scientific innovations. The author Mohamed Abd Elkodous is also grateful to Dean (Research) for giving research friendly scopes at Nile University, Egypt.

Compliance with ethical standards

Conflict of interest

All the authors have declared that, there is no conflict of interest regarding the contribution to the feature article publication.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Kaushik Pal
    • 1
  • M. Abd Elkodous
    • 2
  • M. L. N. Madhu Mohan
    • 3
  1. 1.Department of NanotechnologyBharath Institute for Higher Education and Research (BIHER) Research Park, Bharath UniversityChennaiIndia
  2. 2.School of Engineering and Applied Sciences, Center for Nanotechnology (CNT)Nile UniversityGizaEgypt
  3. 3.Liquid Crystal Research Laboratory (LCRL)Bannari Amman Institute of TechnologySathyamangalamIndia

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