nano tech 2011 International Nanotechnology Exhibition and Conference celebrated its 10th annual event from Feb. 16 to Feb. 18, 2011 in Tokyo. 638 exhibitors covering an exhibition surface of 6786 square meters presented their nano technologies and products at thisworld’s largest nano technology fair. 190 exhibitors, around 30 percent, came from one of the 20 exhibiting foreign countries and regi…