Colloidal Crystal - Introduction


A colloidal crystal is a highly ordered array of particles which can be formed over a long range (to about a centimeter). Arrays such as this appear to be analogous to their atomic or molecular counterparts with proper scaling considerations. A good natural example of this phenomenon can be found in precious opal, where brilliant regions of pure spectral color result from close-packed domains of colloidal spheres of amorphous silicon dioxide, SiO2 (see above illustration). The spherical particles precipitate in highly siliceous pools and form highly ordered arrays after years of sedimentation and compression under hydrostatic and gravitational forces. The periodic arrays of spherical particles make similar arrays of interstitial voids, which act as a natural diffraction grating for light waves in photonic crystals, especially when the interstitial spacing is of the same order of magnitude as the incident lightwave.

Read more about this topic:  Colloidal Crystal

Other articles related to "introduction":

China Miéville - Bibliography - Nonfiction - Introductions To Fiction By Other Authors
... The Borribles An Introduction, 2001 ... Things That Never Happen An Introduction, 2002 ... Wizardry and Wild An Introduction, 2004 ...
Introduction - Music - Songs and Tracks
... Introduction", by Chicago from The Chicago Transit Authority "Introduction", by Hood from Outside Closer "Introduction", by Kajagoogoo from White Feathers "Introduction", by Mike Oldfield from Tubular Bells ...
John Frame (theologian) - Selected Works
... Introduction to Presuppositional Apologetics Part 2 ... Van Til The Theologian, 1976 ISBN 0-916034-02-X Medical Ethics, 1988 ISBN 0-87552-261-0 Perspectives on the ...
Introduction To Metaphysics
... An Introduction to Metaphysics (Introduction à la Métaphysique) is a 1903 essay by Henri Bergson that explores the concept of reality ...

Famous quotes containing the word introduction:

    My objection to Liberalism is this—that it is the introduction into the practical business of life of the highest kind—namely, politics—of philosophical ideas instead of political principles.
    Benjamin Disraeli (1804–1881)

    We used chamber-pots a good deal.... My mother ... loved to repeat: “When did the queen reign over China?” This whimsical and harmless scatological pun was my first introduction to the wonderful world of verbal transformations, and also a first perception that a joke need not be funny to give pleasure.
    Angela Carter (1940–1992)

    For better or worse, stepparenting is self-conscious parenting. You’re damned if you do, and damned if you don’t.
    —Anonymous Parent. Making It as a Stepparent, by Claire Berman, introduction (1980, repr. 1986)