Geoffrey Alan Stuart Ozin FRSC is a British chemist, currently Tier 1 Canada Research Chair in Materials Chemistry and Distinguished University Professor at the University of Toronto. Ozin is the recipient of numerous awards for his research on nanomaterials, including the Meldola Medal and Prize in 1972 and the Rutherford Memorial Medal in 1982. He won the Albert Einstein World Award of Science in 2011, the Royal Society of Chemistry's Centenary Prize in 2015, and the Humboldt Prize in 2005 and 2019. He has co-founded three university spin-off companies: Torrovap in 1985, which manufactures metal vapor synthesis scientific instrumentation; Opalux in 2006, which develops tunable photonic crystals; and Solistra in 2019, which develops photocatalysts and photoreactors for hydrogen production from carbon dioxide and methane.