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Adv Mater. 2017 Oct;29(40). doi: 10.1002/adma.201701850. Epub 2017 Sep 5.

Nanolattices: An Emerging Class of Mechanical Metamaterials.

Author information

1
Department of Mechanical and Aerospace Engineering, University of California Irvine, CA, 92697, USA.
2
Institute for Applied Materials, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany.
3
Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK.
4
HRL Laboratories Limited Liability Company, Malibu, CA, 90265, USA.
5
Department of Mechanical Engineering, Virginia Tech, 635 Prices Fork Road, Blacksburg, VA, 24061, USA.

Abstract

In 1903, Alexander Graham Bell developed a design principle to generate lightweight, mechanically robust lattice structures based on triangular cells; this has since found broad application in lightweight design. Over one hundred years later, the same principle is being used in the fabrication of nanolattice materials, namely lattice structures composed of nanoscale constituents. Taking advantage of the size-dependent properties typical of nanoparticles, nanowires, and thin films, nanolattices redefine the limits of the accessible material-property space throughout different disciplines. Herein, the exceptional mechanical performance of nanolattices, including their ultrahigh strength, damage tolerance, and stiffness, are reviewed, and their potential for multifunctional applications beyond mechanics is examined. The efficient integration of architecture and size-affected properties is key to further develop nanolattices. The introduction of a hierarchical architecture is an effective tool in enhancing mechanical properties, and the eventual goal of nanolattice design may be to replicate the intricate hierarchies and functionalities observed in biological materials. Additive manufacturing and self-assembly techniques enable lattice design at the nanoscale; the scaling-up of nanolattice fabrication is currently the major challenge to their widespread use in technological applications.

KEYWORDS:

metamaterials; nanoarchitectures; nanolattices; size effects

PMID:
28873250
DOI:
10.1002/adma.201701850

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