%0 Journal Article
%A Schwarz, Daniel
%A van Gastel, Raoul
%A Zandvliet, Harold J. W.
%A Poelsema, Bene
%T Formation and decay of a compressed phase of 4,4′-biphenyldicarboxylic acid on Cu(001)
%J Physical chemistry, chemical physics
%V 15
%N 14
%@ 1463-9084
%C Cambridge
%I RSC Publ.
%M FZJ-2015-03345
%P  5007-5016
%D 2013
%X The molecular arrangement of 4,4′-biphenyldicarboxylic acid (BDA) on Cu(001) has been studied at high coverage and relatively high temperature ([similar]400 K) using Low Energy Electron Microscopy, LEEM, and selected area diffraction, μLEED. Next to the previously reported c(8 × 8) structure, we also observe a compressed phase with a Image ID:c3cp00049d-t1.gif superstructure in matrix notation. All four equivalent (rotational and mirror) domains are equally populated. Both the c(8 × 8) and the compressed phase are confined to the first layer and the latter has a 14% higher density compared to the c(8 × 8) phase. Remarkably, this compressed phase is stable only during deposition and decays after interruption of the deposition. Apparently, the density of physisorbed admolecules on top of the c(8 × 8) layer has to be above a relevant threshold to allow the formation of the compressed phase.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000316007900020
%R 10.1039/c3cp00049d
%U https://juser.fz-juelich.de/record/201035