کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9776201 | 1509483 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Measuring the Tilt Angle of ODTMS Self-Assembled Monolayers on Al Oxide Surfaces
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کلمات کلیدی
order-disorder phase transitions - تغییرات فاز نظم اختلالSelf-assembly using surface chemistry - خودآموزی با استفاده از شیمی در سطحOrganic/inorganic interfaces - رابط های ارگانیک / غیر معدنیPolycrystalline surfaces - سطوح پلی کریستالیX-ray absorption spectroscopy - طیف سنجی جذب اشعه ایکسCoatings - پوشش ها
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Adsorbed octadecyltrimethoxysilane (ODTMS) on native aluminium oxide substrates have been studied with near-edge X-ray absorption fine structure (NEXAFS) spectroscopy in order to determine the average tilt angle of the surface film. Previous experiments have shown that the time-dependant adsorption isotherm of ODTMS on Al exhibits oscillatory adsorption. In this work we present the findings of our tilt angle studies for Al samples dipped in a 0.75% ODTMS solution at various times during oscillatory adsorption. It clearly can be seen that the alignment of the surface film is related to the coverage, hence for a minimum in the film coverage (at 65 s dip time) the tilt angle of the ODTMS film is found to be â¼50° relative to the surface normal. Below the minimum in the film coverage (at 30 s dip time) the tilt angle has been found to be â¼41° whereas for samples dipped above the minimum film coverage (at 80 and 95 s) the angles are â¼46° and â¼45° respectively. These measurements indicate a strong correlation between film alignment and film coverage during oscillatory adsorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 154, Issues 1â3, 22 September 2005, Pages 9-12
Journal: Synthetic Metals - Volume 154, Issues 1â3, 22 September 2005, Pages 9-12
نویسندگان
L. Thomsen, B. Watts, D.V. Cotton, P.C. Dastoor,