کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
596414 879518 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation of gold nanoparticles in triblock terpolymer-modified inverse microemulsions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Formation of gold nanoparticles in triblock terpolymer-modified inverse microemulsions
چکیده انگلیسی

The influence of polystyrene (PS)-block–poly(1,4-butadiene) (PB)-block–poly(ethylene oxide) (PEO) and poly(1,4-butadiene)-block–polystyrene-block–poly(ethylene oxide) triblock terpolymers on the phase behaviour of the w/o microemulsion of the pseudo-ternary system made of water/sodium dodecylsulfate (SDS)/xylene–pentanol (1:1) was investigated by varying the sequence of the blocks. Independent on the terpolymer used an enlargement of L2 phase can be observed with increasing polymer concentration. Simultaneously, a decrease of the diameter of the mixed inverse terpolymer-surfactant micelles can be observed by dynamic light scattering. After cross-linking of the butadiene units, covalently closed nanocapsules with an average size between 20 and 30 nm can be observed.When the triblock terpolymer-modified microemulsion is used as a template for the nanoparticle formation, gold nanoparticles with diameters of about 10 nm are formed. After solvent evaporation, the terpolymer-modified, hydrophobic gold nanoparticles can be redispersed in a toluene–pentanol mixture, and eliminated from the non-soluble surfactant residue.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 329, Issue 3, 5 November 2008, Pages 169–176
نویسندگان
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