Organization of nanoparticles in polymer brushes.
نویسندگان
چکیده
We have demonstrated a facile infiltration process, in which gold nanoparticles are assembled into block copolymer brushes. After solvent annealing, the polymer-covered nanoparticles are either sequestered into the corresponding block copolymer domain or expulsed from the brush, depending on the shell density of the nanoparticles.
منابع مشابه
Morphology selection of nanoparticle dispersions by polymer media.
Designable media can control properties of nanocomposite materials by spatially organizing nanoparticles. Here we theoretically study particle organization by ultrathin polymer films of grafted chains ("brushes"). Polymer-soluble nanoparticles smaller than a brush-determined threshold disperse in the film to a depth scaling inversely with particle volume. In the polymer-insoluble case, aggregat...
متن کاملDetection of Polymer Brushes developed via Single Crystal Growth
Single crystals consisting various surface morphologies and epitaxial structures were applied to investigate the effect of other phase regions in the vicinity of a given tethered chains-covered area having a certain molecular weight of amorphous brushes. The designed experiments demonstrated that regardless of the type of surface morphology (patterned and especial mixed-brushes, homo and co...
متن کاملTowards controlled polymer brushes via a self-assembly-assisted-grafting-to approach.
Precise synthesis of polymer brushes to modify the surface of nanoparticles and nanodevices for targeted applications has been one of the major focuses in the community for decades. Here we report a self-assembly-assisted-grafting-to approach to synthesize polymer brushes on flat substrates. In this method, polymers are pre-assembled into two-dimensional polymer single crystals (PSCs) with func...
متن کاملSynthesis and Fabrication of Multifunctional Nanocomposites: Stable Dispersions of Nanoparticles Tethered with Short, Dense and Polydisperse Polymer Brushes in Poly(methyl methacrylate)
iron oxide, [ 10 ] zinc oxide, [ 11 ] cadmium selenide, [ 12 ] gold [ 13 ] and others in nanocomposites is a promising approach to introduce new functionalities to a polymer such as tunable refractive index, magnetism, surface hardness, UV absorption, etc. However, aggregation of nanoparticles is commonly encountered, leading to unsatisfactory performance of nanocomposites and frustrating effor...
متن کاملSelf-organization of homopolymer brush- and mixed homopolymer brush-grafted silica nanoparticles in block copolymers and polymer blends
In this report, hierarchical self-organization of poly(tert-butyl acrylate) (PtBA) brushand mixed PtBA/ polystyrene (PS) brush-grafted silica nanoparticles (NPs) in PtBA-b-PS block copolymer and PtBA/PS polymer blend matrices having different molecular weights was investigated using transmission electron microscopy (TEM). Driven by the entropic interactions between the brushes and the polymer m...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of the American Chemical Society
دوره 131 5 شماره
صفحات -
تاریخ انتشار 2009