Nanocylindrical confinement imparts highest structural order in molecular self-assembly of organophosphonates on aluminum oxide.
Nanoscale
; 9(19): 6291-6295, 2017 May 18.
Article
em En
| MEDLINE
| ID: mdl-28485443
ABSTRACT
We report the impact of geometrical constraint on intramolecular interactions in self-assembled monolayers (SAMs) of alkylphosphonates grown on anodically oxidized aluminum (AAO). Molecular order in these films was determined by sum frequency generation (SFG) spectroscopy, a more sensitive measure of order than infrared absorption spectroscopy. Using SFG we show that films grown on AAO are, within detection limits, nearly perfectly ordered in an all-trans alkyl chain configuration. In marked contrast, films formed on planar, plasma-oxidized aluminum oxide or α-Al2O3 (0001) are replete with gauche defects. We attribute these differences to the nanocylindrical structure of AAO, which enforces molecular confinement.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Nanoscale
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Alemanha