… he continued researching the fundamentals of ion selectivity in polymeric membranes at Lawrence Berkeley Lab with Dr. Brett Helms and Dr. Ryan Kingsbury and expanded his research … he continued researching the fundamentals of ion selectivity in polymeric membranes at Lawrence Berkeley Lab with Dr. Brett Helms and Dr. Ryan Kingsbury and expanded his research … he continued researching the fundamentals of ion selectivity in polymeric membranes at Lawrence Berkeley Lab with Dr. Brett Helms and Dr. Ryan Kingsbury and expanded his research …