Tiny Pen Prints Olympic Logo
EVANSTON, Ill., Aug. 14, 2008 -- Nanoscientists have created a lithography technique that can print on the nanometer, micrometer and millimeter length scales quickly, easily and inexpensively through arrays of tiny polymer pens. In a demonstration of the new method, the scientists printed the 2008 Summer Olympics logo 15,000 times in an area about the size of a dime (1 sq cm), with each logo so small that 2500 could fit on a single grain of rice. Polymer pen lithography (PPL) was used to fabricate 15,000 copies of the