Heather Allen is a Professor and Ohio State Distinguished Scholar in the Department of Chemistry and Biochemistry at The Ohio State University, where she has been a faculty member since 2000. She began her academic journey at Saddleback College from 1989 to 1992 before transferring to the University of California, Irvine, where she earned a B.S. in Chemistry in 1993 and a Ph.D. in Physical Chemistry in 1997 under advisors including F. S. Rowland and B. Finlayson-Pitts. Allen conducted postdoctoral research from 1997 to 1999 at the University of Oregon with Geraldine L. Richmond as a NOAA Postdoctoral Fellow in Climate and Global Change. At Ohio State, she progressed from Assistant Professor (2000-2005) to Associate Professor (2005-2008) and Full Professor (2008-present), holding the Dow Professor of Chemistry title from 2020 to 2024. She also maintains a courtesy appointment as Professor of Pathology since 2011 and was named Ohio State Distinguished Scholar in 2015.

Allen's research focuses on interfacial chemistry, particularly molecular organization, ion pairing, hydration, and solvation at aqueous interfaces of environmental and biological relevance. Utilizing pioneering techniques such as broadband vibrational sum frequency generation (BB-VSFG) spectroscopy—which she was the first to design for liquid surfaces—along with polarized Raman, infrared reflection spectroscopies, and Brewster angle microscopy, her studies address atmospheric aerosols, ocean-air interfaces, geochemical systems, cell membrane biophysics, and lung surfactant function. Notable publications include "Vibrational Sum Frequency Generation (VSFG) Spectroscopy of Water Adsorption on Surfaces of Yttria-Stabilized Cubic Zirconia (YSZ)" (J. Chem. Phys., 2024), "Solution and Surface Solvation of Nitrate Anions with Iron (III) and Aluminum (III) in Aqueous Environments" (J. Phys. Chem. A, 2024), "Interfacial Enrichment of Lauric Acid Assisted by Long-Chain Fatty Acids, Acidity and Salinity at Sea Spray Aerosol Surfaces" (J. Phys. Chem. A, 2024), and "Interfacial Carbonyl Groups of Propylene Carbonate Facilitate the Reversible Binding of Nitrogen Dioxide" (Phys. Chem. Chem. Phys., 2024). Her impactful work has earned prestigious honors, including the 2022 American Chemical Society Irving Langmuir Award in Chemical Physics, Alexander von Humboldt Research Award (2015), Alfred P. Sloan Research Fellowship (2005), Camille Dreyfus Teacher-Scholar Award (2006), Beckman Young Investigator Award (2003), NSF CAREER Award (2002), and Fellowship in the American Association for the Advancement of Science (2012). Allen's contributions have profoundly influenced the understanding of interfacial processes in chemistry, bridging environmental, atmospheric, and biomedical sciences.

Professional Email: allen.697@osu.edu