posted Nov 11, 2011, 6:38 AM by William Paul
updated Dec 22, 2011, 12:02 PM by SPM Evaporator
Jean-Benoît Lalanne, William Paul, David Oliver, and Peter H. Grütter
We describe an etching procedure for the production of sharp iridium tips with apex radii of 15–70 nm, as determined by scanning electron microscopy, field ion microscopy, and field emission measurements. A coarse electrochemical etch followed by zone electropolishing is performed in a relatively harmless calcium chloride solution with high success rate.