A method for forming a substrate comprising nanometer-scale pillars or cones that project from the surface of the substrate is disclosed. The method enables control over physical characteristics of the projections including diameter, sidewall angle, and tip shape. The method further enables control over the arrangement of the projections including characteristics such as center-to-center spacing and separation distance.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
This invention was made with Government support under contract DE-FG36-08GOI8004 awarded by the Department of Energy. The Government has certain rights in the invention.