Professors Charles Lieber at Harvard University and James Heath at UCLA, both scientific founders of Nanosys Inc., were cited with Science Magazine's Scientific Breakthrough of the Year 2001 for their research in nanoelectronic circuit design.   . . .   Herbert J. Neuhaus has been appointed president and CEO of NanoPierce Connection Systems Inc., the new wholly owned subsidiary of NanoPierce Technologies Inc. NanoPierce Connections Systems has begun high-volume-production of WaferPierce, a semiconductor wafer treatment.   . . .   Opto-electronic components and subsystems manufacturer Multiplex Inc. has expanded its sales force and has signed CompRep Associates to represent Multiplex to customers in New England; Taarcom to focus on the San Francisco Bay Area; Multiwave to cover Texas; and Tech-Trek to serve Canada.