Selective deposition of organic molecules onto DPPC templates--a molecular dynamics study.
J Colloid Interface Sci
; 389(1): 206-12, 2013 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-23044270
ABSTRACT
The site-selective deposition of organic molecules onto template structures to create ordered micro/nanoscale arrangements has drawn more and more attention because of the broad possibility, for example, application in organic electronic devices. Here we present a molecular dynamics study toward the selective deposition of organic molecules 3(5)-(9-anthryl) pyrazole (ANP), perylene and sexiphenyl (6P) onto template structures made of the phospholipid L-α-dipalmitoyl-phosphatidylcholine (DPPC) in alternating liquid expanded (LE) and liquid condensed (LC) states. The simulation results indicate, first of all, that the molecules immerge into both LE and LC phases instead of staying on top of them. Furthermore, the simulations replicate the empirically observed higher diffusion constants of the organic molecules on LE phase compared to LC phase of the underlying DPPC layer. Additionally, we propose a possible mechanism for the diffusion barrier between LE/LC phase needed to explain the experimental findings of the selective deposition. Altogether, this study supports the notions suggested by the experiments on the causes of the selective deposition while giving a deeper insight into the molecular processes involved.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Perileno
/
Hidrocarbonetos Policíclicos Aromáticos
/
Pirazóis
/
1,2-Dipalmitoilfosfatidilcolina
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article