Structure of Physisorbed Overlayers of Dipolar Molecules: A Combined Study by Atomic-Beam Scattering and Molecular Dynamics

J. Carlos Ruiz-Suarez; Michael L. Klein; Michael A. Moller; Paul A. Rowntree; Giacinto Scoles; Jia Xu

doi:10.1103/PhysRevLett.61.710

Structure of Physisorbed Overlayers of Dipolar Molecules: A Combined Study by Atomic-Beam Scattering and Molecular Dynamics

J. Carlos Ruiz-Suarez, Michael L. Klein, Michael A. Moller, Paul A. Rowntree, Giacinto Scoles, and Jia Xu

Phys. Rev. Lett. 61, 710 – Published 8 August 1988

Abstract

Atomic-beam diffraction and molecular-dynamics calculations have been combined to study the structures of overlayers of the dipolar molecules C $H_{3}$ F and C $H_{3}$ Cl physisorbed on bare and xenon-plated graphite crystals. On the former substrate, C $H_{3}$ F adopts a commensurate triangular lattice with one molecule per unit cell, whereas on the latter the unit cell doubles. On both substrates C $H_{3}$ Cl is incommensurate with antiferroelectrically ordered molecules arranged in a uniaxially distorted structure.

Received 3 December 1987

DOI:https://doi.org/10.1103/PhysRevLett.61.710

Authors & Affiliations

J. Carlos Ruiz-Suarez^1,*, Michael L. Klein², Michael A. Moller³, Paul A. Rowntree⁴, Giacinto Scoles⁴, and Jia Xu⁴

¹Center for Molecular Beams and Laser Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L3G1
²Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104
³Department of Chemistry, McMaster University, Hamilton, Ontario, Canada L8S4M1
⁴Chemistry Department, Princeton University, Princeton, New Jersey 08544

^*Present address: Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Merida, A.P. 73 "Cordemax," 97310 Yucatán, Mexico.