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Photonics

Chemistry In Pictures

Chemistry in Pictures: Glowing galaxy

by Manny I. Fox Morone
September 23, 2021
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Most Popular in Materials

 

A smattering of oblate droplets glowing bright orange, red, and green in the dark under ultraviolet lamps.
Credit: Olena Tynkevych and Yuriy Khalavka

These drops of water glow thanks to tiny crystals suspended inside them. Olena Tynkevych and Yuriy Khalavka, a research associate and a professor, respectively, at Yuriy Fedkovych Chernivtsi National University, are investigating how the size of these fluorescent cadmium telluride and cadmium sulfide nanocrystals affect their optical properties. The colors, which appear under ultraviolet light, arise from crystal sizes that are just barely different: the green droplets contain crystals that are about 3 nm wide, orange ones are about 4 nm wide, and red ones are 5 nm.

Submitted by Olena Tynkevych and Yuriy Khalavka

Do science. Take pictures. Win money. Enter our photo contest here.

Click here to see more Chemistry in Pictures.

Chemical & Engineering News
ISSN 0009-2347
Copyright © 2024 American Chemical Society

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