Micro- and nanotechnology sensors, systems, and applications IV : 23-27 April 2012, Baltimore, Maryland, United States / by Micro-and nanotechnology sensors, systems and applications (Conference) (4th : 2012 Apr : Baltimore, MD) 546789, George, Thomas 203446, Islam, M. Saiful, 1970- 546790, Dutta, Achyut K. 546791