
Proceedings Paper
Imaging of Liquid Crystals Using a Tunneling MicroscopeFormat | Member Price | Non-Member Price |
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Paper Abstract
Individual organic molecules in a liquid crystal array on a graphite surface have been imaged with the scanning tunneling microscope (STM) with near-atomic resolution 1,2. Two-dimensional order has been identified in 4-n-octy1-4'-cyanobiphenyl (8CR) and 5-nony1-2-n-nonoxylphenylpyrimidine (PYT) 909). The high resolution of the STM allows direct observation of intermolecular distances, angles and orientations. From the data, we find in the case of 803 a variety of surface phases can exist whereas for PYP 909 we find only one simple configuration. The graphite substrate appears to influence the molecules in two ways: 1) the molecular axes lie parallel to the surface so that the STM images a cross-section of the classical smectic planes; and 2) molecules of one plane are registered with those of adjacent planes, a degree of order which is not normally observed in the bulk.
Paper Details
Date Published: 25 July 1989
PDF: 9 pages
Proc. SPIE 1080, Liquid Crystal Chemistry, Physics, and Applications, (25 July 1989); doi: 10.1117/12.976420
Published in SPIE Proceedings Vol. 1080:
Liquid Crystal Chemistry, Physics, and Applications
J. William Doane; Zvi Yaniv, Editor(s)
PDF: 9 pages
Proc. SPIE 1080, Liquid Crystal Chemistry, Physics, and Applications, (25 July 1989); doi: 10.1117/12.976420
Show Author Affiliations
J. S. Foster, IBM (United States)
J. E. Frommer, IBM (United States)
J. E. Frommer, IBM (United States)
J. K. Spong, IBM (United States)
Published in SPIE Proceedings Vol. 1080:
Liquid Crystal Chemistry, Physics, and Applications
J. William Doane; Zvi Yaniv, Editor(s)
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