کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9567348 1503713 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemical properties of an oxide nanoskin on a polymeric surface
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Chemical properties of an oxide nanoskin on a polymeric surface
چکیده انگلیسی
Vapor phase chemisorption of 1,3,5,7-tetramethylcyclotetrasiloxane onto polyimide (PI) substrates and subsequent photooxidation using 172 nm vacuum ultraviolet (VUV) light successfully produced a silicon dioxide (SiO2) layer of molecular-scale thickness, that is, an “oxide nanoskin” (ONS). This ONS was estimated to be around 1 nm thick by high-resolution transmission electron microscopy. Due to the ONS coating, the surface acidity of the PI substrate increased markedly and its isoelectric point shifted from around pH 3.5 to 2.0, which was almost equal to that of a native oxide-covered Si (SiO2/Si) substrate. PI surfaces both with and without the ONS were further modified using a vapor of fluoroalkylsilane (FAS). Based on contact angle analysis, the surface energy of the FAS/ONS/PI substrate was mostly consistent with that of a SiO2/Si substrate covered with a self-assembled monolayer (SAM) composed of FAS molecules. Our ONS was found to be effective in fabricating a FAS-SAM on a polymer substrate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 244, Issues 1–4, 15 May 2005, Pages 334-337
نویسندگان
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