Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Coating selected area
Patent
1993-01-07
1994-09-20
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Coating selected area
205135, 427124, 427259, C25D 502, G01N 2700
Patent
active
053486382
ABSTRACT:
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: 4969978 (1990-11-01), Tomita
Thin Solid Films, vol. 175, No. 1, Aug. 1989, Lausanne CH pp. 81-84.
Physical Review Letters, 55(9), 951-954 (1985), Gimzewski, J. K. Surface Sciences 181, 380-390 (1987), Travaglini, G.
Leader William T.
Matsushita Electric - Industrial Co., Ltd.
Niebling John
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