Interfacial Effects on Nanoscale Wrinkling in Gold-Covered Polystyrene

Craig T. Chapman; Jeffrey T. Paci; Won Kyu Lee; Clifford J. Engel; Teri W. Odom; George C. Schatz

doi:10.1021/acsami.6b08554

Interfacial Effects on Nanoscale Wrinkling in Gold-Covered Polystyrene

Craig T. Chapman^*, Jeffrey T. Paci, Won Kyu Lee, Clifford J. Engel, Teri W. Odom, George C. Schatz

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Nanoscale wrinkling on the surfaces of polymer-based materials can be precisely controlled by depositing thin metal films of varying thicknesses. The deposition of these films fundamentally alters the mechanical properties of the substrates in ways that are not simply described using traditional continuum mechanical frameworks. In particular, we find, by modeling within a finite element analysis approach, that the very act of depositing a metal film may alter the Young's modulus of the polymer substrate to depths of up to a few hundred nanometers, creating a modified interfacial skin layer. We find that simulated wrinkle patterns reproduce the experimentally observed features only when the modulus of this surface layer varies by more than ∼500 nm and is described using a sigmoidal gradient multiplier.

Original language	English (US)
Pages (from-to)	24339-24344
Number of pages	6
Journal	ACS Applied Materials and Interfaces
Volume	8
Issue number	37
DOIs	https://doi.org/10.1021/acsami.6b08554
State	Published - Sep 21 2016

Funding

This research was supported by ONR Grant N00014-13-1-0172. W.-K.L. gratefully acknowledges support from the Ryan Fellowship and the Northwestern University International Institute for Nanotechnology.

Keywords

finite element simulations
interfaces
polystyrene
surfaces
thin films
wrinkles

ASJC Scopus subject areas

General Materials Science

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10.1021/acsami.6b08554

Cite this

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title = "Interfacial Effects on Nanoscale Wrinkling in Gold-Covered Polystyrene",

abstract = "Nanoscale wrinkling on the surfaces of polymer-based materials can be precisely controlled by depositing thin metal films of varying thicknesses. The deposition of these films fundamentally alters the mechanical properties of the substrates in ways that are not simply described using traditional continuum mechanical frameworks. In particular, we find, by modeling within a finite element analysis approach, that the very act of depositing a metal film may alter the Young's modulus of the polymer substrate to depths of up to a few hundred nanometers, creating a modified interfacial skin layer. We find that simulated wrinkle patterns reproduce the experimentally observed features only when the modulus of this surface layer varies by more than ∼500 nm and is described using a sigmoidal gradient multiplier.",

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AU - Paci, Jeffrey T.

AU - Lee, Won Kyu

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AU - Odom, Teri W.

AU - Schatz, George C.

PY - 2016/9/21

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KW - finite element simulations

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Interfacial Effects on Nanoscale Wrinkling in Gold-Covered Polystyrene

Abstract

Funding

Keywords

ASJC Scopus subject areas

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