Introduction ant 10-2 metre microelectromechanical cm= 10 mm 10-3 metre mm- 000 microns (um) ust mite 2004m 10metre= 0.1 mm quantum corral of 104m 48 iron atoms on copper surface positioned one at a time with a scanning tunneling microscope tip 14 nm corral diameter human hair 10-50 um wide 10-6 metre 10-7metre= 0.14 1.0 angstroms(A) DNA red blood cell 2-5 um wide 2-12 nm diameter carbon nanotub 2 nm diamete Company Logo Company Logo Introduction