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Soft Matter c olloids formed by self- and co-assembly processes

Soft Matter c olloids formed by self- and co-assembly processes building stones: homopolymers , block copolymers, surfactants, inorganic nanoparticles, e tc. p article size from nm to m m, molar mass 10 4 –10 9 g/ mol. Nanoprecipitation. Block copolymer micelles in selective solvents.

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Soft Matter c olloids formed by self- and co-assembly processes

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  1. Soft Matter colloids formed by self- and co-assembly processes building stones: homopolymers, block copolymers, surfactants, inorganic nanoparticles, etc. particle size from nm to mm, molar mass 104–109g/mol Nanoprecipitation Block copolymer micelles in selective solvents Polyelectrolyte–surfactant complexes

  2. Various particle shapes… diblock copolymer vesicles nanoprecipitated spheres wormlike micelles (diblock polyelectrolyte + perfluorosurfactant) raspberry particles (triblock copolymer micelles with segregated domains) Applications: Carrier vessels (pharmacology), nanoreactors

  3. Methods Microscopic techniques Transmission Electron Microscopy, Scanning Electron Microscopy, Atomic Force Microscopy Scattering techniques Light Scattering, Small-Angle X-Ray Scattering, Small-Angle Neutron Scattering Scattered radiation intensity, I, is measured as a function of scattering angle q. Due to interference of scattered waves, the I(q) function bears information about the mutual positions of scattering centers (interference maximum at l = 2p/q) Magnitude of the scattering vector: Static (LS, SAXS, SANS)Dynamic (LS) time-averaged I time dependence of I Sees particle structure and Sees movement and internal interactions dynamics of particles Spectroscopic techniques Fluorescence spectroscopy, NMR l Light: 400–700 nm X-ray, neutrons: 0.1–0.2 nm

  4. Electron Microscopy vs. Scattering MicroscopyScattering Dry state (or amorphous ice) Solution Image of limited number of particles Averaged data about particles You directly get the image You directly get a strange curve

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