X-ray-diffraction and scanning-tunneling-microscopy studies of a liquid-crystal film adsorbed on single-crystal graphite

Journal Article · Mon Mar 15 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.7401· OSTI ID:6796616

Dai, P; Wang, S; Taub, H; Buckley, J E ^[1]; Ehrlich, S N ^[2]; Larese, J Z ^[3]; Binnig, G; Smith, D P.E. ^[4]

---

1. Department of Physics and Astronomy, University of Missouri-Columbia, Columbia, Missouri 65211 (United States)
2. School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)
3. Brookhaven National Laboratory, Upton, New York 11973 (United States)
4. IBM Physics Group, Schellingstrasse 4, 8000 Muenchen (Germany)

Synchrotron x-ray-diffraction and scanning-tunneling-microscopy (STM) experiments reveal a new commensurate monolayer structure of 10CB (decylcyanobiphenyl) molecules adsorbed on the (0001) graphite surface. Our results are consistent with two generic structures for [ital n]CB monolayers on surfaces of hexagonal symmetry. The monolayer [ital d] spacing of the new phase inferred by STM is 10% larger than that obtained by x-ray diffraction on the same sample. We suggest that part of this discrepancy results from a systematic error introduced in calibration of the STM length scale against the graphite substrate.

• DOE Contract Number: FG02-85ER45183; AC02-76CH00016
• OSTI ID: 6796616
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:12; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
AROMATICS
BIPHENYL
BREMSSTRAHLUNG
CARBON
COHERENT SCATTERING
CRYSTAL STRUCTURE
CRYSTALS
CYANOGEN
DIFFRACTION
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
ELEMENTAL MINERALS
ELEMENTS
FILMS
FLUIDS
GRAPHITE
HYDROCARBONS
LIQUID CRYSTALS
LIQUIDS
MICROSCOPY
MINERALS
MONOCRYSTALS
NONMETALS
ORGANIC COMPOUNDS
RADIATIONS
SCANNING ELECTRON MICROSCOPY
SCATTERING
STABILITY
SUBSTRATES
SYNCHROTRON RADIATION
TUNNEL EFFECT
X-RAY DIFFRACTION