In Situ Characterization of Binary Mixed Polymer Brush-Grafted Silica Nanoparticles in Aqueous and Organic Solvents by Cryo-Electron Tomography
作者： Tara L. Fox , Saide Tang , Jonathan M. Horton , Heather A. Holdaway , Bin Zhao
DOI: 10.1021/ACS.LANGMUIR.5B01739
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摘要: We present an in situ cryo-electron microscopy (cryoEM) study of mixed poly(acrylic acid) (PAA)/polystyrene (PS) brush-grafted 67 nm silica nanoparticles organic and aqueous solvents. These organic–inorganic are predicted to be environmentally responsive adopt distinct brush layer morphologies different solvent environments. Although the self-assembled morphology PAA/PS particles has been studied previously a dried state, no direct visualization microphase separation was achieved environment. CryoEM allows sample imaged situ, that is, frozen solvated at resolution transmission electron microscope. Cryo-electron tomograms (cryoET) were generated for both N,N-dimethylformamide (DMF, nonselective good solvent) water (a selective PAA). Different nanostructures brushes observed these two Overall, is mo...
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