کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
607331 1454574 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Layer-by-layer assembly of polymersomes and polyelectrolytes on planar surfaces and microsized colloidal particles
ترجمه فارسی عنوان
ترکیب لایه های پلیمرز و پلی الکترولیت ها بر روی سطوح مسطح و ذرات مایکرویز شده کلوئیدی
کلمات کلیدی
مونتاژ لایه لایه، نانومواد کلوئیدی، پلیمرز
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


• Polymersomes can be assembled in polyelectrolyte multilayers without rupturing.
• TEM visualisation of intact polymersomes coexisting on a solid surface.
• Monotonic linear increase of the film thickness during assembly of polymersomes.
• Multilayered films with compartmentalised hydrophilic/hydrophobic domains.

Hybrid polyelectrolyte multilayer systems were fabricated on top of planar surfaces and colloidal particles via layer by layer (LbL) assembly of polystyrene sulphonate (PSS) and polybenzyl methacrylate-block-poly(dimethylamino)ethyl methacrylate (PBzMA-b-PDMAEMA) polymersomes. Polymersomes were prepared by self assembly of PBzMA-b-PDMAEMA copolymer, synthesised by group transfer polymerisation. Polymersomes display a diameter of 270 nm and a shell thickness of 11 nm. Assembly on planar surfaces was followed by means of the Quartz Crystal Microbalance with Dissipation (QCM-D) and Atomic Force Microscopy (AFM). Detailed information on the assembly mechanism and surface topology of the polymersome/polyelectrolyte films was thereby obtained. The assembly of polymersomes and PSS on top of silica particles of 500 nm in diameter was confirmed by ζ-potential measurements. Confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed that polymersome/PSS coated silica particles increase in total diameter up to 3–5 μm. This hints toward the formation of densely packed polymersome layers. In addition, CLSM showed that polymersome/PSS films exhibit a high loading capacity that could potentially be used for encapsulation and delivery of diverse chemical species. These results provide an insight into the formation of multilayered films with compartmentalised hydrophilic/hydrophobic domains and may lead to the successful application of polymersomes in surface-engineered colloidal systems.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 421, 1 May 2014, Pages 132–140
نویسندگان
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