کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1678423 | 1009941 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of micellar film morphologies of semifluorinated block copolymers by AFM
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The micellar morphologies of well-defined amphiphilic block copolymers composed of 1H,1H-dihydroperfluorooctyl methacrylate (FOMA) and ethylene oxide (EO) blocks with different chain lengths were effectively investigated by using tapping mode-atomic force microscopy (TM-AFM). By spin-casting chloroform solutions, well-ordered spherical micellar films could be obtained for poly(FOMA10k-b-EO10k) and poly(FOMA20k-b-EO20k) copolymers. The atomic force microscopy (AFM) height and phase image analysis indicated that dark regions of the micelles corresponded to PEO blocks and the light regions were for PFOMA blocks. The spherical micelles with PEO corona and PFOMA core were also identified by transmission electron microscopy (TEM) and X-ray photoelectron spectrometer (XPS) analysis. The core diameters of the block-copolymer aggregates were 20Â nm for poly(FOMA10k-b-EO10k) and 30Â nm for poly(FOMA20k-b-EO20k) by TM-AFM, whereas slightly lower values of 17 and 26Â nm were obtained from TEM. A detailed study on the inverted morphological change observed in the micelles films after annealing above glass transition temperature (Tg) was also presented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 108, Issue 10, September 2008, Pages 1210-1214
Journal: Ultramicroscopy - Volume 108, Issue 10, September 2008, Pages 1210-1214
نویسندگان
Min Young Lee, Seung Ho Kim, Hullathy Subban Ganapathy, Sok Won Kim, Kwon Taek Lim,