A solution of nanoscopic iron oxide particles changes color as a magnet gets closer to it, causing the particles to re¬arrange. The color changes from red to blue as the magnetic field’s strength increases.
Credit: Yin laboratory, University of California, Riverside
New publications, experiments and breakthroughs in nanotechnology--and what they mean.
Controlling Color with Magnets
New material can become any visible color
SOURCE: "Highly Tunable Superparamagnetic Colloidal Photonic Crystals"
Yadong Yin et al.
Angewandte Chemie International Edition online, July 3, 2007
RESULTS: Researchers at the University of California, Riverside, have demonstrated that a liquid containing suspended magnetite particles changes colors in the presence of an electromagnet. The liquid can be made to reflect any visible color and can switch colors at a rate of twice per second.
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This document is part of the “How-To Guide for Most Common Measurements” centralized resource portal. This tutorial provides a detailed guide for measurement and device considerations to take temperature measurements using thermocouples. Get an introduction to thermocouples, which are inexpensive sensing devices widely used with PC-based data acquisition systems. Also review some specific thermocouple examples and learn how thermocouples work and ways to integrate them into a data acquisition measurement system.
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