Spring 2026 | Chemistry Seminar Series
"From Avogadro’s Number to Labubu: Colossal Impact of Colloids in Science and Society and Our Tiny Contribution in Decoding Colloidal Interfaces."
Dr. Mahamud Subir
Professor, Department of Chemistry, Ball State University
Thursday, April 9th, 3:30pm in FB-253
Abstract: Colloids are small particles, in the nano- and micron-size range, dispersed in a bulk medium. As such, colloids involve a molecular boundary between two distinct phases, which we call an interface. Thus, the study of colloids is inexorably linked to the investigation of interfacial chemistry. The original research component of this talk will entail our recent findings on molecular processes that occur at the interfaces of polymeric colloids and nano-sized oil droplets. The fundamental insights garnered contribute to the understanding of molecular interactions with colloidal microplastics, which persist in the aquatic environment, and nanoemulsions, which are relevant to enhanced oil recovery. Our research also advances the applicability of second harmonic generation—an interface-selective, laser-based technique—to the study of a wide range of colloids. Indeed, colloids are pervasive in the natural world and play a pivotal role in society. Thus, this talk will also include an introductory historical sketch of colloidal science and its impact.