02/19/19 - 9:45 AM to 11:00 AM
Department Seminar: Professor Ilya Zharov
Functional nanoporous materials from “hairy” nanoparticle building blocks
We developed a new approach for the preparation of functional membranes using polymer brush nanoparticles (“hairy” nanoparticles, HNPs). We design these membranes with molecular and ionic transport controlled by the pore size, polymer structure and environmental conditions. Our approach provides novel types of functional membrane materials with applications in separations, fuel cells and lithium batteries.
In this talk, I will describe the preparation and properties of several responsive membranes, including gated silica membranes pore-filled with temperature-responsive poly(N-isopropylacrylamide) brushes and pH-responsive poly(2-dimethylaminoethyl methacrylate) brushes, and ultrafiltration membranes reversibly assembled from HNPs carrying poly(2-hydroxyethyl methacrylate) brushes. I will then focus on our latest results in developing charged responsive nanoporous membranes assembled using HNPs carrying polyelectrolyte brushes. I will describe the different mechanisms of transport selectivity in charged HNP membranes as well as polymer-polymer interactions in these materials that lead to their formation and stability. Finally, I will discuss our current work towards the preparation of pH- and temperature-gated HNP membranes.
Tuesday, Feb. 19
Kate & Michael Bárány Conference Room (117/119 Smith Hall)
Current research in Professor Zharov's group is aimed at design and investigation of novel nanomaterials with applications in alternative energy, sustainability and drug delivery. The work is conducted in three main areas: (1) nanoporous colloidal membranes, (2) hybrid ion-conducting materials and (3) functional inorganic nanoparticles. Within these three areas, several new directions evolved recently or are evolving, including (1) self-assembled porous materials, (2) catalysis with surface-immobilized Au nanoclusters, (3) mixed matrix membranes for pervaporation, (4) carbon-based nanoporous materials for capacitive energy storage, and (5) applications of porous colloidal films in biosensing.
Professor Zharov was born in Chelyabinsk, Russia. He obtained his Bachelor of Science degree with honors from Chelyabinsk State University, where he worked on substituent effects in tetrahydroquinolines. In 1990, his family moved to Israel and starting in 1991, Zharov attended Technion – Israel Institute of Technology in Haifa. In 1994, he obtained his master's degree, under the supervision of Professor Yitzhak Apeloig focused on Si=C and Ge=C double bond formation and on other aspects of organosilicon chemistry. He served in the Israel Defense Force after completing his degree. In 1995, he joined the group of Professor Josef Michl at the University of Colorado, Boulder, where he worked on preparation and properties of Group 14 cations in non-polar solvents, on weakly nucleophilic carboranyl anions, on neutral carboranes, on lithium conducting polymers and on photoresist materials. He obtained his doctorate in June 2000 and was a recipient of several graduate fellowships including the national Link Foundation Fellowship. In August 2000, he joined the Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign (UIUC), as a Beckman Fellow. he worked with Professor Steven C. Zimmerman at the Chemistry Department of UIUC on preparation of dendrimers and hyperbranched polymers for molecular recognition, and also on computer modeling of dendrimers and carbon nanotubes.
Professor Zharov came to Utah to start his independent research career in 2003. Since that time, his research group has published more than 60 papers in the areas of mesoporous materials and materials for theranostics. He has received the Camille and Henry Dreyfus Foundation New Faculty Award and National Science Foundation CAREER Award, was named an Emerging Investigator by the Royal Society of Chemistry, was a winner of IUPAC Young Observer Award, and spent time at the Weizmann Institute in Israel as a Feinberg Foundation Visiting Faculty. In 2009, he was promoted to the rank of associate professor with tenure.