Five renowned scientists will describe the challenges and opportunities for commercializing new technologies, particularly nanotechnology, during a special symposium scheduled for Aug. 19 at the national meeting of the American Chemical Society in Boston. Speakers include Charles Lieber and George Whitesides, of Harvard University; Jeremy Berg, director of the National Institute of General Medical Sciences at the National Institutes of Health; David Tirrell, of the California Institute of Technology; and Chad Mirkin, of Northwestern University.