Formation and decay of a compressed phase of 4,4'-biphenyldicarboxylic acid on Cu(001)

Daniel Schwarz; Raoul van Gastel; Henricus J.W. Zandvliet; Bene Poelsema

doi:10.1039/C3CP00049D

Formation and decay of a compressed phase of 4,4'-biphenyldicarboxylic acid on Cu(001)

Daniel Schwarz, Raoul van Gastel, Henricus J.W. Zandvliet, Bene Poelsema

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Abstract

The molecular arrangement of 4,4′-biphenyldicarboxylic acid (BDA) on Cu(001) has been studied at high coverage and relatively high temperature (∼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.

Original language	English
Pages (from-to)	5007-5016
Number of pages	10
Journal	Physical chemistry chemical physics
Volume	15
Issue number	14
DOIs	https://doi.org/10.1039/C3CP00049D
Publication status	Published - 7 Feb 2013

Keywords

METIS-295658
IR-89907

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10.1039/C3CP00049D

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title = "Formation and decay of a compressed phase of 4,4'-biphenyldicarboxylic acid on Cu(001)",

abstract = "The molecular arrangement of 4,4′-biphenyldicarboxylic acid (BDA) on Cu(001) has been studied at high coverage and relatively high temperature (∼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.",

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T1 - Formation and decay of a compressed phase of 4,4'-biphenyldicarboxylic acid on Cu(001)

AU - Schwarz, Daniel

AU - van Gastel, Raoul

AU - Zandvliet, Henricus J.W.

AU - Poelsema, Bene

PY - 2013/2/7

Y1 - 2013/2/7

N2 - The molecular arrangement of 4,4′-biphenyldicarboxylic acid (BDA) on Cu(001) has been studied at high coverage and relatively high temperature (∼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.

AB - The molecular arrangement of 4,4′-biphenyldicarboxylic acid (BDA) on Cu(001) has been studied at high coverage and relatively high temperature (∼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.

KW - METIS-295658

KW - IR-89907

U2 - 10.1039/C3CP00049D

DO - 10.1039/C3CP00049D

M3 - Article

SN - 1463-9076

VL - 15

SP - 5007

EP - 5016

JO - Physical chemistry chemical physics

JF - Physical chemistry chemical physics

IS - 14

ER -

Formation and decay of a compressed phase of 4,4'-biphenyldicarboxylic acid on Cu(001)

Abstract

Keywords

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