Day 22 of the chemistry advent timeline first looks at the discoverer of another allotrope of carbon: Sumio Iijima is a physicist who discovered carbon nanotubes. They have since been used in a number of applications, with research looking into further possibilities.
Jacqueline Barton carries out work on electron transport in DNA. Her work has potential applications in disease diagnosis and treatment. In 2015, she won the American Chemical Society’s highest honour, the Priestley Medal, for her work.