w1_effect_of_size

w1_effect_of_size - The Effect of Size on Properties...

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Unformatted text preview: The Effect of Size on Properties Scaling Laws in 1-, 2-, and 3-Dimensions n c-k 1 X/ n c Labors of the Months (Norwich, England, ca. 1480). The ruby color is probably due to embedded gold nanoparticles.) David Stroud, OSU Physics The Lycurgus Cup (glass; British Museum; 4 th century A. D.) When illuminated from outside, it appears green. However, when Illuminated from within the cup, it glows red. Red color is due to very small amounts of gold powder (about 40 parts per million) David Stroud, OSU Physics Lycurgus Cup illuminated from within When illuminated from within, the Lycurgus cup glows red. The red color is due to tiny gold particles embedded in the glass, which have an absorption peak at around 520 nm What is the origin of the color? Answer: ``surface plasmons An SP is a natural oscillation of the electron gas inside a gold nanosphere . SP frequency depends on the dielectric function of the gold, and the shape of the nanoparticle....
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This note was uploaded on 07/17/2008 for the course CHEM 694 taught by Professor Dr.coe during the Spring '05 term at Ohio State.

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w1_effect_of_size - The Effect of Size on Properties...

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