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- W2738461942 abstract "The study on the nanoparticle-polymer interactions is very important for the design/preparation of high performance polymer nanocomposite. Here we present a method to quantify the polymer-particle interaction at single molecule level by using AFM-based single molecule force spectroscopy (SMFS). As a proof-of-concept study, we choose poly-l-lysine (PLL) as the polymer and several different types of polyoxometalates (POM) as the model particles to construct several different polymer nanocomposites and to reveal the binding mode and quantify the binding strength in these systems. Our results reveal that the shape of the nanoparticle and the binding geometry in the composite have significantly influenced the binding strength of the PLL/POM complexes. Our dynamic force spectroscopy studies indicate that the disk-like geometry facilitate the unbinding of PLL/AlMo6 complexes in shearing mode, while the unzipping mode becomes dominate in spherical PLL-P8W48 system. We have also systematically investigated the effects of charge numbers, particle size, and ionic strength on the binding strength and binding mode of PLL/POM, respectively. Our results show that electrostatic interactions dominate the stability of PLL/POM complexes. These findings provide a way for tuning the mechanical properties of polyelectrolyte-nanoparticle composites." @default.
- W2738461942 created "2017-07-31" @default.
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- W2738461942 date "2017-07-28" @default.
- W2738461942 modified "2023-10-14" @default.
- W2738461942 title "Single Molecule Study on Polymer–Nanoparticle Interactions: The Particle Shape Matters" @default.
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- W2738461942 doi "https://doi.org/10.1021/acs.langmuir.7b01698" @default.
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