Search Results for: liquid crystal

Audience Age Group: Middle School This activity would work best in groups of 2-4 students depending on materials.   Time Frame Three days- Day 1: Background Day 2: Lab Day 3: Drawing conclusions Day 2: Lab Set-up: 15 minutes Activity: 20 Clean-up: 15   Objective(s)   After completing the activity, participants will be able to:…

Modified by Farrell Rogers from E. R. Waclawik, M. J. Ford, P. S. Hale, J. G. Shapter, and N. H. Voelcker, “Liquid Crystal Displays: Fabrication and Measurment of a Twisted Nematic Liquid-Crystal Cell,” J. Chem. Educ., 81, 854 (2004) and C. Liberko and J. Shearer, “Preparation of a Surface-Oriented Liquid Crystal,” J. Chem. Educ., 77,…

Procedure developed by S. M. Condren and G. C. Lisensky. This experiment deals with the disassembly of an inexpensive liquid crystal display (LCD) watch and testing several of the properties of the LCD panel Safety Wear eye protection Procedure Remove the front or back plate to access the interior. Your watch may be slightly different…

Procedure by Elizabeth Boatman and George Lisensky. See “Colors in Liquid Crystals,” Journal of Chemical Education, 82, 1360A (2005). One of the principal advantages of liquid crystals is their ability to map out thermal regions of different temperature. This experiment uses a Peltier heating and cooling block to make small changes in temperature and an…

Procedure based on G. H. Brown and J. J. Wolken, Liquid Crystals and Biological Systems, Academic Press, NY, 1979, pp. 165-167 and W. Elser and R. D. Ennulat, Adv. Liq. Cryst. 2, 73 (1976). One of the principal advantages of liquid crystals is their ability to map out thermal regions of different temperature. These cholesteric-nematic…

Liquid crystals are becoming more and more popular in today’s technology. They are in everything from televisions to pool thermometers. The Liquid Crystal Sensors Activity gives students a hands on look at what liquid crystals are and how that they can be used. Students will use laboratory techniques to synthesize their own liquid crystals which…

Three vials of liquid crystal. Liquid crystals are not typical liquids or solids; they have greater ordering than more normal liquids but less ordering than crystalline solids. Liquid crystals are found in various manufactured items such as television screens, laptop monitors, clocks, etc. They are also found naturally in cholesterol, cell membranes, and soap bubbles.…

Procedure modified by George Lisensky and Jacob Horger, Beloit College, from the Inverse Opal Photonic Crystals Laboratory Guide by R. Schroden and N. Balakrishnan, University of Minnesota MRSEC, 2001. Photonic crystals are periodic optical nanostructures that are designed to affect the motion of photons in a similar way that periodicity of a semiconductor crystal affects…

Subject: Chemistry – amorphous metal, carbon nanotubes, crystal structure, ferrofluid, LEDs, liquid crystals, memory metal, nanoparticles, nanotechnology, piezoelectricity, superconductors Physics – amorphous metal, carbon nanotubes, magnetism, microfluidics, nanotechnology, nanoparticles, size and scale, superconductors , x-ray diffraction Biology – hydrophobic/hydrophilic, liquid crystals, nanoparticles, nanotechnology, self –assembly, size and scale,x-ray diffraction Engineering/Materials Science – amorphous metal, carbon nanotubes, crystal structure, ferrofluid,…

Amorphous Metal Biology Carbon Nanotubes and Buckyballs Crystal Structure Ferrofluid Instruments and Devices LEDs Liquid Crystals Lithography Hydrophobic/ Hydrophilic Properties Magnetism Memory Metal Microfluidics Nanotechnology Nanoparticles and Quantum Dots Piezoelectricity Self Assembly and Surfaces Size and Scale Sustainability X-ray Diffraction