For our 30th episode it is a pleasure to welcome Prof. Charles (Charlie) T. Campbell! Prof. Campbell is Professor Emeritus in Chemistry at the University of Washington, where he is also Adjunct Professor of Chemical Engineering and of Physics, and the Rabinovitch Endowed Chair in Chemistry since 2012. He received his BS (1975) and PhD (1979, under JM White) degrees at the University of Texas at Austin in Chemical Engineering and Chemistry, then did postdoctoral research in Germany with Gerhard Ertl (2007 Nobel Prize Winner). He is the author of over 370 publications and two patents on surface chemistry, catalysis, physical chemistry and biosensing, with 40,000 citations and an h-index of 103 (Google Scholar). He is an elected Fellow of the ACS, the AVS and the AAAS, Honorary Fellow of the Chinese Chemical Society, and Member of the Washington State Academy of Sciences. He received the Arthur W. Adamson Award of the ACS, the ACS Award for Colloid or Surface Chemistry, the ACS Gabor Somorjai Award for Creative Research in Catalysis, the ACS Catalysis Award for Exceptional Achievements, the Gerhard Ertl Lecture Award, the Robert Burwell Award/Lectureship of the North American Catalysis Society, the Medard W. Welch Award of the AVS, the Gauss Professorship of the Göttingen Academy of Sciences, the Ipatieff Lectureship of Northwestern University and an Alexander von Humboldt Research Award. He serves as Editor-in-Chief of Surface Science Reports and Catalysis Reviews in Science and Engineering, and on the boards of Catalysis Letters, Surface Science and Topics in Catalysis. He previously served as Editor-in-Chief of Surface Science for over ten years.