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High-k Dielectric Materials: Structural Properties and Selection
Published in Niladri Pratap Maity, Reshmi Maity, Srimanta Baishya, High-K Gate Dielectric Materials, 2020
P. Sri Harsha, K. Venkata Saravanan, V. Madhurima
Polymers are a class of soft matter, which cover a wide range of materials with a wide range of properties like flexibility, tunable thermal stability, molding capability, and volume and weight reduction. Polymers can be tuned for their dielectric properties. Their use in electronics as dielectrics is going up due to their tunability while retaining their useful properties such as flexibility, low weight, and low cost, leading to potential applications in conformal electronics. Of the various classes of polymers available, we will be considering here the electro-active polymers (EAPs). EAPs have been extensively used in recent years in a broad range of modern electrical applications such as flat panel display, microelectronic packaging, fiber optics, medical applications, fuel cells, high frequency transducers, artificial muscles, and other sensors and actuators (Bar-Cohen, 2001; Kim and Tadokoro, 2007; Tagarielli et al., 2012; Bar-Cohen, 2004).
Molecular scale insights from NMR studies of hybrid systems formed via doping silver QDs in 6CHBT liquid crystal: a quantitative investigation of their optoelectronic properties
Published in Liquid Crystals, 2023
Archana Kumari Singh, Satya Pal Singh
Soft Matter includes polymers, colloids, liquid crystals, and granular materials [1,2]. Nanoparticles used in biomedical applications interact with biological fluids, forming a biomolecular corona that can affect their behaviour. Supramolecular self-assembly is a fascinating natural process driven by characteristic moieties in chemical structures. Aggregates formed through self-assembly control the macroscopic properties of materials, offering unique functionalities like self-healing and shape-memory. Understanding the origin of molecular self-assembly is crucial for exploring its correlations with chemical structure [3,4] and finding new hierarchical structures with tailored functional properties. The process of molecular self-assembly is governed by supramolecular interactions (ionic, hydrophobic, van der Waals, hydrogen, and coordination bonds), but it can also be directed by kinetically labile covalent bonds [5–8]. Ionic Liquid Crystals (ILCs) have recently attracted much attention [9–11]. The presence of both polar and non-polar areas in the cations causes the material to create distinct regions or domains. These regions can interact with neighbouring molecules or ions in multiple ways, contributing to the stability of mesophase. The polar and non-polar regions might interact differently with other components or external stimuli, affecting the overall behaviour and qualities of the material.
Manifestation of strong magneto-electric dipolar coupling in ferromagnetic nanoparticles−FLC composite: evaluation of time-dependent memory effect
Published in Liquid Crystals, 2018
Tripti Vimal, Shivani Pandey, Swadesh K. Gupta, Dharmendra P. Singh, Kaushlendra Agrahari, Govind Pathak, Sumit Kumar, Pankaj K. Tripathi, Rajiv Manohar
The development of nanotechnology provides new opportunities in the field of experimental soft matter research. The dispersion of the nano-structured particles, carbon nanotubes and quantum dots (QDs) in the LC material leads to the various exciting phenomenon such as enhanced photoluminescence, nonvolatile memory effect, change in the alignment of LC molecules and so on [10–12]. During last decade, the tuning of physical properties of host LC materials with the addition of guest nanomaterial is a most convenient method to design the devices with significant properties. The composite system of FLCs with the variety of NPs has been emerged as one of the perspective method for improving the performance of pristine FLC. Among all nanomaterials, the magnetic nanoparticles (NPs) are of keen interest to researchers owing to their praiseworthy magnetic properties.