Wetting properties induced in nano-composite POSS-MA polymer films by atomic layer deposited oxides

Autor:	Giovanna Scarel, Anita J. Vincent-Johnson, Brian H. Augustine, Gregory N. Parsons, Kyle A. Vasquez, W. Christopher Hughes, Kyoungmi Lee
Rok vydání:	2012
Předmět:	Nanocomposite Materials science Oxide Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films Contact angle Atomic layer deposition chemistry.chemical_compound Chemical engineering chemistry Polymer chemistry Wetting Thin film Glass transition Layer (electronics)
Zdroj:	Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 30:01A105
ISSN:	1520-8559 0734-2101
DOI:	10.1116/1.3639134
Popis:	Due to their unique properties, nano-composite polyhedral oligomeric silsequioxane (POSS) copolymer films are attractive for various applications. Here we show that their natural hydrophobic character can become hydrophilic when the films are modified by a thin oxide layer, up to 8 nm thick, prepared using atomic layer deposition. A proper choice of the deposition temperature and thickness of the oxide layer are required to achieve this goal. Unlike other polymeric systems, a marked transition to a hydrophilic state is observed with oxide layers deposited at increasing temperatures up to the glass transition temperature (∼110 °C) of the POSS copolymer film. The hydrophilic state is monitored through the water contact angle of the POSS film. Infrared absorbance spectra indicate that, in hydrophilic samples, the integral of peaks corresponding to surface Al–O (hydrophilic) is significantly larger than that of peaks linked to hydrophobic species.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9803e728373b8ac985bfdcd6a7250a0a https://doi.org/10.1116/1.3639134 Zobrazit plný text záznamu