Zsigmondy, Richard Adolf

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Zsigmondy, Richard Adolf (1865–1929) Austrian chemist who received the 1925 Nobel Prize in chemistry for his work on colloids. While employed at a glass manufacturing company (1897–1900), Zsigmondy discovered a water suspension of gold, and proposed that the shape and size of colloids could be deduced from the way in which the particles scatter light. To aid such studies, he developed the ultra-microscope with Heinrich Siedentopf in 1903.

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