A scanning tunneling microscope suitable for biological applications
作者:
Antonio Cricenti,
Renato Generosi,
Stefano Selci,
期刊:
Review of Scientific Instruments
(AIP Available online 1994)
卷期:
Volume 65,
issue 1
页码: 80-84
ISSN:0034-6748
年代: 1994
DOI:10.1063/1.1144751
出版商: AIP
数据来源: AIP
摘要:
We have designed and built a scanning tunneling microscope (STM) suitable for biological applications. A sound‐isolated chamber contains the STM unit; the chamber can be evacuated or filled with inert gas, after the sample and tip are loaded, in order to reduce contamination on sample and tip. The STM unit is mounted inside two separable cylindrical supports. The lower cylinder contains the sample holder mounted on top of a step‐motor controlledx‐y‐zstage, while the upper one contains the piezoelectric tip scanner. AnI/Vconverter preamplifier mounted inside thex‐y‐zstage and a completely digitized feedback circuit, together with a full software package in UNIX X‐window environment and data processing, allow fast sample–tip approach and reduced acquisition time. Atomic resolution images of highly oriented pyrolytic graphite (HOPG) in air and reproducible large scan on a platinum grating are routinely obtained. Images of human liver ferritin deposited on an activated gold substrate have also been obtained.
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