Probe for a scanning tunneling microscope and method of manufact

Details Probe for a scanning tunneling microscope and method of manufact Probe for a scanning tunneling microscope and method of manufact

1994-09-20

1996-08-20

Anderson, Bruce C.

Radiant energy

Ion generation

Field ionization type

250306, H01J 3726

Patent

active

055481175

ABSTRACT:
Disclosed is a probe for use in a scanning tunneling microscope which can measure a macromolecule, i.e., a protein molecule. The probe is manufactured by covering a metal wire having a sharp end with a thin organic film, removing an end of the metal wire by an electric field evaporation process, electrodepositing metal ions on the metal wire and removing a portion of the organic film. A monomolecular film is formed on the surface of a metal wire by chemically adsorbing a chlorosilane based chemical adsorbent. Only a tip of the chemically adsorbed film is removed by the electric field evaporation procedure, and the metal ions are electrodeposited on the tip of the metal wire. As a result, a sharp metal tip is formed. After that, the chemically adsorbed film is removed by alkyl treatment.

REFERENCES:
patent: 4896044 (1990-01-01), Li
patent: 5348638 (1994-09-01), Nakagawa
patent: 5353632 (1994-10-01), Nakagawa
patent: 5357109 (1994-10-01), Kusumoto

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