Abstract
We have observed the ordered molecular structure of fatty acid and phospholipid Langmuir-Blodgett films with a scanning tunneling microscope. Besides confirming earlier studies of cadmium arachidate bilayers on graphite, we have observed bilayers of di-myristoyl-phosphatic acid (DMPA) on cleaved graphite, and studied monolayers of DMPA on oxidized graphite and on gold-coated calcite in air. We present the first images of a bilayer containing the protein concanavalin A. These experiments confirm the possibility of obtaining STM images by electron transport through layers of organic molecules more than 50 Å thick. Sample preparation, microscopic technique, and results are discussed.
Original language | English |
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Pages (from-to) | 151-158 |
Number of pages | 8 |
Journal | Chemical Physics Letters |
Volume | 145 |
Issue number | 2 |
DOIs | |
State | Published - Mar 1988 |