John Fenn

2026-06-21

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Who is this?

John Bennett Fenn (June 15, 1917 – December 10, 2010) was an American professor of analytical chemistry who was awarded a share of the Nobel Prize in Chemistry in 2002. He shared half of the award with Koichi Tanaka for their work in mass spectrometry. The other half went to Kurt Wüthrich. Fenn's contributions specifically related to the development of electrospray ionization, now a commonly used technique for large molecules and routine liquid chromatography-tandem mass spectrometry. Early in h