کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5187618 1381133 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Size-controllable gold nanoparticles stabilized by PDEAEMA-based double hydrophilic graft copolymer
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Size-controllable gold nanoparticles stabilized by PDEAEMA-based double hydrophilic graft copolymer
چکیده انگلیسی

Poly(N-isopropylacrylamide)-b-[poly(ethyl acrylate)-g-poly(2-(diethylamino)ethyl methacrylate)] (PNIPAM-b-(PEA-g-PDEAEMA)) double hydrophilic graft copolymers were employed to prepare stable colloidal gold nanoparticles in situ with controllable size in aqueous media without any external reducing agent. PDEAEMA side chains served as reduction agent and stabilizer and PNIPAM segment acted as a hydrated layer to enhance the stability of gold nanoparticles. These gold nanoparticles showed a remarkable colloidal stability without any observable flocculation or aggregation for at least 2 months and they were characterized by UV-vis, XRD, TEM and AFM in detail. The size of gold nanoparticles can be tuned by adjusting the length of PDEAEMA side chains and the molar ratio of [DEAEMA]/[AuCl4−]. Both the increasing of the length of PDEAEMA side chains and the decreasing of [DEAEMA]/[AuCl4−] molar ratio resulted in the fall of size.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 50, Issue 16, 31 July 2009, Pages 3990-3996
نویسندگان
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