Céline Guéguen, PhD, is Full Professor of Chemistry at the Université de Sherbrooke, Québec, Canada.

Mohammed Baalousha, PhD, is Professor of Environmental Nanoscience and director of the Environmental Nanoscience & Analytics Laboratory at the University of South Carolina, Columbia, South Carolina, United States.

S. Kim R. Williams is a Professor of Chemistry at the Colorado School of Mines, Golden, Colorado, United States