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Title

A very low current scanning tunneling microscope

AuthorsDunlap, D.; Smith, S.; Bustamante, C.; Tamayo de Miguel, Francisco Javier ; García García, Ricardo
Issue Date1995
PublisherAmerican Institute of Physics
CitationReview of Scientific Instruments 66: 4876-4879 (1995)
AbstractThe applications of the scanning tunneling microscope (STM) in air are usually restricted to good conducting materials as clean metals, doped and passivated semiconductors, or to some molecular adsorbates deposited onto graphite. In order to study poor conducting materials as biological molecules, we have built a very low current STM. This instrument can routinely be operated at 0.1 pA while having a bandwidth of 7 kHz. The advantages of using very low currents are illustrated by imaging 5-nm-thick purple membranes. These membranes can only be imaged at currents smaller than 2 pA. © 1995 American Institute of Physics.
URIhttp://hdl.handle.net/10261/52385
DOI10.1063/1.1146168
Identifiersdoi: 10.1063/1.1146168
issn: 0034-6748
Appears in Collections:(IMN-CNM) Artículos
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