Isomeric effects with di-iodobenzene (C₆H₄I₂) on adsorption on graphite

Authors

Keisuke Fukutani, University of Nebraska-LincolnFollow
Ning Wu, University of Nebraska-LincolnFollow
Peter A. Dowben, University of Nebraska-LincolnFollow

Date of this Version

10-2009

Comments

Published in Surface Science 603:19 (October 1, 2009), pp. 2964–2971; doi: 10.1016/j.susc.2009.08.004 Copyright © 2009 Elsevier B.V. Used by permission. http://www.elsevier.com/locate/susc

Abstract

Differences are seen in the adsorption of 1,2-di-iodobenzene, 1,3-di-iodobenzene, and 1,4-di-iodobenzene on graphite, as a function of exposure, using core level photoemission. The isomer 1,3-di-iodobenzene exhibits significant differences from 1,2-di-iodobenzene, and 1,4-di-iodobenzene in apparent sticking coefficients and core level binding energies. 1,3-Di-iodobenzene adsorb on graphite at 110 K in a strongly Stranski–Krastanov or Volmer–Weber (island) growth mode. The implication is that, even for small molecules adsorption, the adsorbate dipole in the plane of surface and the choice of isomer may matter.