2024-03-28T23:22:16Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1028012020-05-29T07:55:58Zcom_10261_115com_10261_3col_10261_368
Self-assembly of bicomponent molecular monolayers: Adsorption height changes and their consequences
Goiri, Elizabeth
Matena, Manfred
El-Sayed, A.
Lobo-Checa, Jorge
Borghetti, Patrizia
Rogero, Celia
Ortega, J. Enrique
Oteyza, D. G. de
European Commission
Ministerio de Economía y Competitividad (España)
Eusko Jaurlaritza
Under the terms of the Creative Commons Attribution License 3.0 (CC-BY).-- et al.
Codeposition of two molecular species [copper phtalocyanine (CuPc, donor) and perfluoropentacene (PFP, acceptor)] on noble metal (111) surfaces leads to the self-assembly of an ordered mixed layer with a maximized donor-acceptor contact area. The main driving force behind this arrangement is assumed to be the intermolecular C-Hâ̄F hydrogen-bond interactions. Such interactions would be maximized for a coplanar molecular arrangement. However, precise measurement of molecule-substrate distances in the molecular mixture reveals significantly larger adsorption heights for PFP than for CuPc. Most surprisingly, instead of leveling to increase hydrogen-bond interactions, the height difference is enhanced in the blends as compared to the heights found in single-component CuPc and PFP layers. The increased height of PFP in mixed layers points to an overall reduced interaction with the underlying substrate, and its influence on electronic properties like the interface dipole is investigated through work function measurements. © 2014 American Physical Society.
2014-10-01T12:46:24Z
2014-10-01T12:46:24Z
2014
2014-10-01T12:46:24Z
artículo
Physical Review Letters 112(11): 117602 (2014)
http://hdl.handle.net/10261/102801
10.1103/PhysRevLett.112.117602
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100003086
eng
Publisher's version
http://dx.doi.org/10.1103/PhysRevLett.112.117602
info:eu-repo/grantAgreement/EC/FP7/226716
info:eu-repo/grantAgreement/EC/FP7/271909
http://creativecommons.org/licenses/by/3.0/
openAccess
American Physical Society