Designing Hierarchical Nanostructures from Conformable and Deformable Thin Materials

Won Kyu Lee; Teri W. Odom

doi:10.1021/acsnano.9b03862

Designing Hierarchical Nanostructures from Conformable and Deformable Thin Materials

Won Kyu Lee, Teri W. Odom^*

^*Corresponding author for this work

Chemistry

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

33 Scopus citations

Abstract

This Perspective focuses on the design of hierarchical structures in deformable thin materials by patterning mechanical instabilities. Fabrication of three-dimensional (3D) structures with multiple length scales-starting at the nanoscale-can result in on-demand surface functionalities from the modification of the mechanical, chemical, and optical properties of materials. Conventional top-down lithography, however, cannot achieve 3D patterns over large areas (>cm²). In contrast, a bottom-up approach based on controlling strain in layered nanomaterials conformally coated on polymeric substrates can produce multiscale structures in parallel. In-plane and out-of-plane structural hierarchies formed by conformal buckling show unique structure-function relationships. Programmable hierarchical surfaces offer prospects to tune global- and local-level characteristics of nanomaterials that will positively impact applications in nanomechanics, nanoelectronics, and nanophotonics.

Original language	English (US)
Pages (from-to)	6170-6177
Number of pages	8
Journal	ACS nano
Volume	13
Issue number	6
DOIs	https://doi.org/10.1021/acsnano.9b03862
State	Published - Jun 25 2019

Funding

This work was supported by the Office of Naval Research (N00014-13-1-0172) and the National Science Foundation (CMMI-1069180, CMMI-1462633). This work made use of the Northwestern University Micro/Nano Fabrication Facility (NUFAB), which is supported by the State of Illinois and Northwestern University and Northwestern University’s Atomic and Nanoscale Characterization Experimental Center (NUANCE) Center facilities, which are supported by NSF-MRSEC and the MRSEC (DMR-1121262). W.-K.L. gratefully acknowl- edges support from the Ryan Fellowship and the Northwestern University International Institute for Nanotechnology.

ASJC Scopus subject areas

General Engineering
General Materials Science
General Physics and Astronomy

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10.1021/acsnano.9b03862

Cite this

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abstract = "This Perspective focuses on the design of hierarchical structures in deformable thin materials by patterning mechanical instabilities. Fabrication of three-dimensional (3D) structures with multiple length scales-starting at the nanoscale-can result in on-demand surface functionalities from the modification of the mechanical, chemical, and optical properties of materials. Conventional top-down lithography, however, cannot achieve 3D patterns over large areas (>cm2). In contrast, a bottom-up approach based on controlling strain in layered nanomaterials conformally coated on polymeric substrates can produce multiscale structures in parallel. In-plane and out-of-plane structural hierarchies formed by conformal buckling show unique structure-function relationships. Programmable hierarchical surfaces offer prospects to tune global- and local-level characteristics of nanomaterials that will positively impact applications in nanomechanics, nanoelectronics, and nanophotonics.",

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Designing Hierarchical Nanostructures from Conformable and Deformable Thin Materials

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