Polymeric thin shells: measurement of elastic properties at the nanometer scale using atomic force microscopy

Emmanouil Glynos, Vassilis Sboros, Vasileios Koutsos

Research output: Contribution to journalArticle

Abstract

We conducted atomic force microscopy nanocompression tests on thin-walled hollow microspheres in aqueous conditions. The microspheres used for this study consist of a similar to 10 nm soft gel skin and an inner similar to 40 nm stiff polymeric shell. The resulting force-deformation curves revealed an initial small-range non-linear repulsion associated with the soft ultrathin outer layer followed by a linear regime which was used to calculate the Young's modulus of the stiff thin wall. The linear regime is of the order of the shell thickness and the elastic modulus deduced using the linear Reissner relationship is comparable to the corresponding bulk polymer modulus. At larger deformations, we observed near-linear behaviour zones of similar slope separated by various non-linearities, steps and jumps which are associated with buckling events. (c) 2009 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)231-234
Number of pages4
JournalMaterials Science and Engineering: B
Volume165
Issue number3
DOIs
Publication statusPublished - 15 Dec 2009

Cite this

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abstract = "We conducted atomic force microscopy nanocompression tests on thin-walled hollow microspheres in aqueous conditions. The microspheres used for this study consist of a similar to 10 nm soft gel skin and an inner similar to 40 nm stiff polymeric shell. The resulting force-deformation curves revealed an initial small-range non-linear repulsion associated with the soft ultrathin outer layer followed by a linear regime which was used to calculate the Young's modulus of the stiff thin wall. The linear regime is of the order of the shell thickness and the elastic modulus deduced using the linear Reissner relationship is comparable to the corresponding bulk polymer modulus. At larger deformations, we observed near-linear behaviour zones of similar slope separated by various non-linearities, steps and jumps which are associated with buckling events. (c) 2009 Elsevier B.V. All rights reserved.",
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Polymeric thin shells: measurement of elastic properties at the nanometer scale using atomic force microscopy. / Glynos, Emmanouil; Sboros, Vassilis; Koutsos, Vasileios.

In: Materials Science and Engineering: B, Vol. 165, No. 3, 15.12.2009, p. 231-234.

Research output: Contribution to journalArticle

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AU - Sboros, Vassilis

AU - Koutsos, Vasileios

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AB - We conducted atomic force microscopy nanocompression tests on thin-walled hollow microspheres in aqueous conditions. The microspheres used for this study consist of a similar to 10 nm soft gel skin and an inner similar to 40 nm stiff polymeric shell. The resulting force-deformation curves revealed an initial small-range non-linear repulsion associated with the soft ultrathin outer layer followed by a linear regime which was used to calculate the Young's modulus of the stiff thin wall. The linear regime is of the order of the shell thickness and the elastic modulus deduced using the linear Reissner relationship is comparable to the corresponding bulk polymer modulus. At larger deformations, we observed near-linear behaviour zones of similar slope separated by various non-linearities, steps and jumps which are associated with buckling events. (c) 2009 Elsevier B.V. All rights reserved.

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