title: Magnetic field enhanced nano-tip fabrication for four-probe STM studies.
abstract: We present an improved method for fabricating tungsten STM tips for measuring nanoscale objects using a multiprobe STM. The tips were prepared by a 'drop-off' technique combined with a magnetic field. For magnetic field strengths above 150 Oe the electrolyte was seen to rotate about the tungsten anode. This rotation reduced the adhesion of bubbles and led to a reduction in the cone angle of the tips produced. This property is advantageous for multiprobe measurements as it allows one to bring multiple tips into close proximity.
authors: School of Physics and Astronomy, University of Leeds, West Yorkshire, UK.
authors: J E
authors: JE
authors: McKendry
authors: C S
authors: CS
authors: Allen
authors: K
authors: K
authors: Critchley
authors: M L
authors: ML
authors: Górzny
authors: A S
authors: AS
authors: Walton
authors: S D
authors: SD
authors: Evans