John B. Fenn

John B. Fenn was a distinguished chemist who, along with others, developed a technique called electrospray ionization mass spectrometry. This method allows scientists to analyze very large biological molecules like proteins and DNA by turning them into tiny charged particles without destroying them. His work revolutionized how researchers study complex molecules, opening new avenues in medicine and biochemistry. Fenn was awarded the Nobel Prize in Chemistry in 2002 for this innovation. His contributions have significantly advanced scientific understanding of biomolecules, enabling precise analysis that was previously impossible.