Liquid crystals and polymers offer unique optical and electro-optical properties which make them ideal choice for opto-electronic and sensing devices. Doping absorbing dyes into liquid crystals increase their optical responses significantly due to increased absorption in the visible region, absorption induced intermolecular and other guest host effects. In the present paper we have studied the mixture consisting of cholesteric liquid crystal, a polymer and the azo dye. The investigation was performed by (a) Studying the texture and clearing temperature of pure cholesteric liquid crystal (CLC) using Polarizing microscope, (b) The study was repeated for a mixture of CLC and Polymer taken in different proportions, (c) The change in texture at various temperature and the effect on clearing temperature was obtained by doping the CLC with azobenzene dye, and (d) The change in texture and clearing temperature was further studied for the mixture consisting of CLC and Polymer doped with azo dye.The system was investigated further by studying the % transmission, using UV=VIS photo spectrometer, in the visible range for a pure CLC, a mixture of CLC and azo dye, a mixture of CP and MMA doped with azo dye.
Liquid crystals (LCs) are rod-shaped molecules which can diffuse freely like liquid and orient themselves under the influence of electric field with the long axis of molecules pointing in the same direction. Carbon nanotubes and bucky balls are ideal LC dopants because of their strength, conductivity, flexibility and novel electrical characteristics. LCs doped with C60 show enhancement of the director axis reorientation and enhancement of its nonlinear optical properties. Refractivity of LCs can also be altered by doping nanoparticles and=or nanotubes. In this paper, the effect of the presence of nanoparticles=nao-tubes on the phase transition temperatures of the LCs and the classification of the mesophases so formed are investigated by us with the help of the textures studied under the polarizing microscope. The phase transition temperatures as well as the heats of transition of the doped LCs using various techniques are also presented.
With the rapid attention drawn towards the importance of trustable digital user experience and user interface (UI/ UX), there has been intensifying interest in the HCI academic research community towards interpreting the current ethical attitude in the commonly encountered designs of today. The prosaic research topics build upon practical advancements of concepts like value-sensitive design (VSD), practitioner perspective on ethics in practice, and the user/ audience opinion on what they see while working on their day-to-day tasks. However, one of the most prominent predicaments that the authors feel remain unconcluded is who is to be held accountable for the final ethical awareness among the mass public. Hence, to work around the blurring lines of culpability, the authors try to unravel the extent to which different people involved in the entire system are accountable for each reaction invoked throughout the journey, right from ideation to the end-user experience.
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