Very sharp platinum tips for scanning tunneling microscopy

Autor:	L. Libioulle, Y. Houbion, J.‐M. Gilles
Rok vydání:	1995
Předmět:	Mean curvature Materials science business.industry Polishing chemistry.chemical_element Nanotechnology Radius Electrochemical machining law.invention chemistry law Etching (microfabrication) Electrode Optoelectronics Scanning tunneling microscope business Platinum Instrumentation
Zdroj:	Review of Scientific Instruments. 66:97-100
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1146153
Popis:	To achieve both high stability for scanning tunneling microscopy (STM) measurements and well‐defined tunnel current localization even on very rough surfaces, we have developed a new electrochemical procedure using CaCl2 etching and H2SO4 micro polishing technique to obtain a very reproducible tip geometry. The mean curvature radius is about 50 A. The contamination‐free platinum tips are usable for a long time as well in air as in ultrahigh vacuum. The tip quality has been tested by STM measurements on gold (111) surfaces and on liquid‐crystal films. Tips are stable and provide good STM image in far less time than commonly used tips.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fd1eaecdc025c3f6236a05600652d14e https://doi.org/10.1063/1.1146153 Zobrazit plný text záznamu