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Structure and Elasticity of Composite Nanoparticle/Polymer Nanoshells (hybridosome®)

Abstract

Our group recently introduced a new process to synthesize nanoparticle shells of about 100nm, named “hybridosomes®”. Here, the structure and the mechanical properties of hybridosomes® made from iron oxide nanoparticles and poly(acrylic acid) are characterized using TEM, AFM and an osmotic compression technique. For this latter, the size distribution of the hybridosomes is monitored by nanoparticle tracking analysis (NTA) in presence of poly(ethylenglycol)s of different molecular weights. It is found that the size of the hybridosomes® can be tuned from ca 80nm to over 110nm by adjusting the amount of nanoparticles and that their shell consists in a single layer of nanoparticles, with a porous structure. The size of the pores is estimated from osmotic compression experiments at ca 4 000 g mol-1. The mechanical properties are measured both at the ensemble level using size measurements under osmotic pressure and at the single nanoparticle level by Atomic Force Microscopy nanoindentation. Both osmotic and AFM experiments are analyzed in the framework of the continuum elastic theory of thin shells and yield a value of the Young's modulus of the order of the MPa

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Publication details

The article was received on 07 Apr 2017, accepted on 13 May 2017 and first published on 17 May 2017


Article type: Paper
DOI: 10.1039/C7SM00705A
Citation: Soft Matter, 2017, Accepted Manuscript
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    Structure and Elasticity of Composite Nanoparticle/Polymer Nanoshells (hybridosome®)

    F. Sciortino, M. Thivolle, M. Kahn, C. Gaillard, S. Chevance and F. Gauffre, Soft Matter, 2017, Accepted Manuscript , DOI: 10.1039/C7SM00705A

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