Vapor Sorption in Self-Assembled Gold Nanoparticle/Dendrimer Films Studied by Specular Neutron Reflectometry

Autor:	A. Yasuda, Tobias Vossmeyer, R. Krustev, Nadejda Krasteva
Rok vydání:	2003
Předmět:	chemistry.chemical_classification Analyte Materials science Analytical chemistry Nanoparticle Sorption Surfaces and Interfaces Polymer Condensed Matter Physics chemistry Electrochemistry General Materials Science Wetting Neutron reflectometry Specular reflection Layer (electronics) Spectroscopy
Zdroj:	Langmuir. 19:7754-7760
ISSN:	1520-5827 0743-7463
DOI:	10.1021/la0267488
Popis:	In the present work, specular neutron reflectometry was used to study the sorption of D2O and perdeuterated toluene in self-assembled Au nanoparticle/poly(amidoamine) composite films. The method provides information about analyte-induced film swelling and analyte distribution profiles across the films. Our data suggest that film swelling upon exposure to the analytes is negligible within the resolution of the method. Strong differences are observed between the distribution profiles of D2O and toluene-d8. Water penetrates into the film with an exponentially decaying concentration profile. In contrast, toluene-d8 forms a thin “wetting” layer on top of the film, while the bulk of the film remains essentially analyte free. These results are explained by taking into account the chemical structure of the dendritic polymer used for film preparation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::95650d3a686b0faab6a67206a20d4ca4 https://doi.org/10.1021/la0267488 Zobrazit plný text záznamu