TY  - JOUR
AU  - Schwarz, Daniel
AU  - van Gastel, Raoul
AU  - Zandvliet, Harold J. W.
AU  - Poelsema, Bene
TI  - Formation and decay of a compressed phase of 4,4′-biphenyldicarboxylic acid on Cu(001)
JO  - Physical chemistry, chemical physics
VL  - 15
IS  - 14
SN  - 1463-9084
CY  - Cambridge
PB  - RSC Publ.
M1  - FZJ-2015-03345
SP  -  5007-5016
PY  - 2013
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000316007900020
DO  - DOI:10.1039/c3cp00049d
UR  - https://juser.fz-juelich.de/record/201035
ER  -