Galleries | Nanolithography & Nanomanipulation

Friction Force Lithography on Silicon

Friction force image of a patterned n-octadecyltrichlorosilane SAM
on silicon using bias-assisted nanolithography. The terminal methyl
group is converted to a carboxyl group by a redox reaction as the
biased tip passes over the film in a predefined pattern. The bright
areas in the image are the carboxyl groups which have much higher friction
than the surrounding methyl-terminated SAM film. 2µm scan.