Thu-Hoa Tran-Thi received her PhD degree in radiation chemistry in 1983 at the University of Paris XI in Orsay. Since 1982, she has been a researcher of the CNRS (National Council of Scientific Research) at CEA (Atomic Energy Commission, Saclay), and is currently CNRS Director of Research. During 1982-97, her research interests included the photophysical and photoreactivity of porphyrins and phthalocyanines compounds, photochemical reactions in solution, amorphous solid state systems and organized media using fast and ultrafast laser spectroscopy techniques. In 1989, as an invited scientist at the University of Sherbooke in Quebec, she developed collaborative projects with physicists, theoretical chemists and biologists, and from 1990 to 2000 was Adjunct Professor. From 2000 to 2006, she was vice-president and president of the French Group of Photochemistry. Since 1998, she has also developed chemical sensors of air pollutants. In 2010, she co-founded the start-up ETHERA (www.ethera-labs.com) and in recognition for her research, was named to the French Legion of Honneur.She presently leads the “Chemical Sensorsâ€team in the CEA-CNRS NIMBE unit and is also the scientific counsellor of ETHERA.She has directed 88 students including 16 PhD students and 28 postdoctoral fellows. She has published 90 articles and has 11 patents.