Boron, arsenic, and antimony, among other substances, are used as dopants when added to a pure semiconductor material to alter its electrical characteristics.
Artificially produced gemstones[?] (such as Ruby (gemstone)) usually contain a dopant to identify them as such.
... Neruda, poet
August 28 - Secondo Campini, Italian jet pioneer
November 30 - Clyfford Still, painter
Deaths:
January 20 - Dmitri Ivanovich Mendeleev, Russian chemist ...