Ahmed Al Harraq (email | web): I am a PhD student in chemical engineering doing experimental research in the group of Dr. Bhuvnesh Bharti, at Louisiana State University. My current research focuses on non-equilibrium assembly and propulsion of colloids. My other research interests include biological motion, microplastics and biomaterials. I was born in Iraq and grew up in Italy. I then went to the University of Strathclyde, in Glasgow, Scotland where I obtained a B.Eng. in Chemical Engineering. When I'm not in the lab, I love to read and go hiking and swimming with my dog, Gibbs (who is coincidentally a lab mix).

Talk details: Magnetic control of short-range attraction vs long-range repulsion
Much about the arrangement of matter depends on a balance between order and disorder. Shortrange Attraction Long-range Repulsion (SALR) indicates colloidal systems assembling according to a push-and-pull behavior determined by electrostatic and excluded volume interactions. We apply the dual nature of ferrofluids to dynamically tune SALR and demonstrate how the balance of attraction and repulsion controls colloidal arrangement into various states, akin to living matter dynamics.