Scaling behavior of Hairy Nanoparticle in good solvent is studied by means of Dissipative Particle Dynamics (DPD). We studied gold spherical nanoparticle (Au) decorated by poly (styrene-b-2-vinylpyridine) (PS-PVP) diblock copolymer with PVP block attached to surface of Au nanoparticle. High grafting density, 1 chain/nm2, is considered. We utilized DPD model and interaction parameters from our previous work, on nanoparticle/diblock copolymer systems. We measured basic chain properties like End-to-end distance, Re, and Radius of Gyration, Rg. Moreover, the size of nanoparticle corona was measured by corresponding radial distribution functions and brush height, H(N), was obtained from End-monomer distribution. We tested the influence of (i) length of the PS-PVP chain and (ii) composition of PS-PVP chain on scaling behavior of Re, Rg and H(N), predicted by Daoud-Cotton model for polymer chains grafted onto the curved surfaces. Furthermore, we tested the influence of size of the spherical core on scaling behavior for selected PS-PVP chain lengths. Finally, we also discuss the scaling behavior for nanoparticle cores beyond spherical shape.
Scaling Laws for Hairy Nanoparticle in Good Solvent
POSOCCO, PAOLA;PRICL, SABRINA;FERMEGLIA, MAURIZIO
2014-01-01
Abstract
Scaling behavior of Hairy Nanoparticle in good solvent is studied by means of Dissipative Particle Dynamics (DPD). We studied gold spherical nanoparticle (Au) decorated by poly (styrene-b-2-vinylpyridine) (PS-PVP) diblock copolymer with PVP block attached to surface of Au nanoparticle. High grafting density, 1 chain/nm2, is considered. We utilized DPD model and interaction parameters from our previous work, on nanoparticle/diblock copolymer systems. We measured basic chain properties like End-to-end distance, Re, and Radius of Gyration, Rg. Moreover, the size of nanoparticle corona was measured by corresponding radial distribution functions and brush height, H(N), was obtained from End-monomer distribution. We tested the influence of (i) length of the PS-PVP chain and (ii) composition of PS-PVP chain on scaling behavior of Re, Rg and H(N), predicted by Daoud-Cotton model for polymer chains grafted onto the curved surfaces. Furthermore, we tested the influence of size of the spherical core on scaling behavior for selected PS-PVP chain lengths. Finally, we also discuss the scaling behavior for nanoparticle cores beyond spherical shape.Pubblicazioni consigliate
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