STEM observation of tungsten tips sharpened by field-assisted oxygen etching

Protein Removal from Tungsten Field-emitter Tips

The r emova l of p r o t e i n m u l t i l a y e r s , and i n d i v i d u a l p r o t e i n molecules from tungs ten f i e l d e m i t t e r t i p s i s described. T i p s exposed t o UV r a d i a t i o n f o r s e v e r a l m i n u t e s i n a i r , o r t o a low p re s su re glow discharge remain covered wi th a p r o t e i n r e s idue t h a t c a n n o t be removed w i t h o u t mod i fy i...

Mechanical Properties of Sharpened Carbon Nanotube Tips

Two-step controllable electrochemical etching of tungsten scanning probe microscopy tips.

Dynamic electrochemical etching technique is optimized to produce tungsten tips with controllable shape and radius of curvature of less than 10 nm. Nascent features such as "dynamic electrochemical etching" and reverse biasing after "drop-off" are utilized, and "two-step dynamic electrochemical etching" is introduced to produce extremely sharp tips with controllable aspect ratio. Electronic cur...

Dynamic electrochemical-etching technique for tungsten tips suitable for multi-tip scanning tunneling microscopes

We present a method to prepare tungsten tips for use in multi-tip scanning tunneling microscopes. The motivation behind the development comes from a requirement to make very long and conical-shape tips with controlling the cone angle. The method is based on a combination of a “drop-off” method and dynamic electrochemical etching, in which the tip is continuously and slowly drawn up from the ele...

Field Emission from As-Grown and Ion-Beam-Sharpened Diamond Particles Deposited on Silicon Tips

Ion-beam bombardment/rnilling was used for sharpening of diamond particles deposited on ends of silicon tips. Radii curvature of diamond coating down to about 20 nm have been formed in such a way. Field emission experiments with sharpened diamond coated emitters have shown that the ion beam treatment effects a considerable shift of current-voltage characteristics of in the lower voltage region.