http://hdl.handle.net/2289/6094 2026-03-12T08:46:03Z http://hdl.handle.net/2289/8605 Title: Enhancement of Electro-Functional Performance in Discotic Liquid Crystals through Controlled Incorporation of Ultrafine Gold Nanoparticles Authors: Mishra, Mukesh; Dhar, Ravindra; Kumar, Sandeep; Singh, Vidya; Tiwari, Praveen Kiran Abstract: Nanoparticles are mixed into discotic liquid crystals (DLCs) to enhance their physical, optical, and electrochemical properties for advanced applications. The incorporation of nanoparticles can improve the thermal and mechanical stability of DLCs, as well as modulate their phase behavior and self-assembly characteristics. Nanoparticles can also serve as alignment aids, promoting uniform orientation of the discotic mesophase. Additionally, they introduce functionalities such as enhanced conductivity, magnetism, or photoluminescence, making the resulting composite materials suitable for diverse applications, including optoelectronic devices, sensors, and smart materials. This synergy between nanoparticles and DLCs enables the development of hybrid systems with novel and improved performance characteristics. In this chapter, we explain the mixing of discotic liquid crystals and nanoparticles. Mainly what size and quantity of nanoparticle should be added to enhance the prop-erty of host DLCs is discussed. Description: Open Access 2025-09-24T00:00:00Z http://hdl.handle.net/2289/6930 Title: Liquid Crystal Dimers Authors: Pal, Santanu Kumar; Kumar, Sandeep Abstract: This book covers in-depth discussion of design principles, synthesis and thermal behavior of all types of liquid crystal (LC) dimers. The text presents recent advances in the field of LC dimers consisting of different mesogenic units such as calamitic, discotic and bent-core molecules. It starts with a chapter on the introduction of liquid crystal dimers, including their odd-even behavior, basic classification of dimers and common mesophases in dimers. The text shows how the molecular architectures are being used to develop new materials to study a range of interesting phenomena such as the biaxial nematic phase containing rod-like and disc-like mesogenic units. Finally, the text presents perspectives related to technological relevance of these dimers such as dopants in LC display mixtures exhibiting faster relaxation time, strong flexoelectric coupling and others to effect control over the properties of these materials. Description: Open Access 2017-07-01T00:00:00Z http://hdl.handle.net/2289/6175 Title: Chemistry of discotic liquid crystals: from monomers to polymers Authors: Kumar, Sandeep Abstract: The self-contained properties of discotic liquid crystals (DLCs) render them powerful functional materials for many semiconducting device applications and models for energy and charge migration in self-organized dynamic functional soft materials. The past three decades have seen tremendous interest in this area, fueled primarily by the possibility of creating a new generation of organic semiconductors and wide viewing displays using DLCs. While a number of books on classical calamitic liquid crystals are available, there are, as yet, no books that are dedicated exclusively to the basic design principles, synthesis, and physical properties of DLCs. Description: Open Access 2011-12-01T00:00:00Z http://hdl.handle.net/2289/6165 Title: Addressing techniques of liquid crystal displays Authors: Ruckmongathan, T.N. Abstract: Unique reference source that can be used from the beginning to end of a design project to aid choosing an appropriate LCD addressing technique for a given application This book will be aimed at design engineers who are likely to embed LCD drivers and controllers in many systems including systems on chip. Such designers face the challenge of making the right choice of an addressing technique that will serve them with best performance at minimal cost and complexity. Readers will be able to learn about various methods available for driving matrix LCDs and the comparisons at the end of each chapter will aid readers to make an informed design choice. The book will address the various driving techniques related to LCDs. Due to the non-linear response of the liquid crystal to external voltages, different driving methods such as passive and active matrix driving can be utilized. The associated theoretical basis of these driving techniques is introduced, and this theoretical analysis is supplemented by information on the implementation of drivers and controllers to link the theory to practice. Written by an experienced research scientist with over 30 years in R&D in this field. Acts as an exhaustive review and comparison of techniques developed for passive-matrix addressing of twisted nematic and super-twisted nematic (STN) LCDs. Discusses the trend towards "High Definition" displays and that a hybrid approach to drive matrix LCDs (combination of active and passive matrix addressing) will be the future of LCD addressing. Contains the author’s recent work on Bit-Slice Addressing that is useful for fast responding LCDs, as well as a Description: Open Access 2014-09-01T00:00:00Z