The Ambiguous Colors of Nanotechnology - Issue 26: Color

Kate Nichols leans her delicate face against the glass of a chemical fume hood in a University of California, Berkeley lab, peering into a beaker filled with a pale yellow liquid—“like a well hydrated person’s pee,” she says, laughing. The yellow brew is a fresh batch of silver nanoparticles. Over the next week, the liquid will turn green, then turquoise, then blue as the particles morph in shape from spheroids to prisms under the influence of time and fluorescent light....

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