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Shape-memory effect in twisted ferroic nanocomposites.

ABSTRACT: The shape recovery ability of shape-memory alloys vanishes below a critical size (~50 nm), which prevents their practical applications at the nanoscale. In contrast, ferroic materials, even when scaled down to dimensions of a few nanometers, exhibit actuation strain through domain switching, though the generated strain is modest (~1%). Here, we develop freestanding twisted architectures of nanoscale ferroic oxides showing shape-memory effect with a giant recoverable strain (>8%). The twisted geometrical design amplifies the strain generated during ferroelectric domain switching, which cannot be achieved in bulk ceramics or substrate-bonded thin films. The twisted ferroic nanocomposites allow us to overcome the size limitations in traditional shape-memory alloys and open new avenues in engineering large-stroke shape-memory materials for small-scale actuating devices such as nanorobots and artificial muscle fibrils.

SUBMITTER: Kim D

PROVIDER: S-EPMC9918508 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature

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Shape-memory effect in twisted ferroic nanocomposites.

Kim Donghoon D Kim Minsoo M Reidt Steffen S Han Hyeon H Baghizadeh Ali A Zeng Peng P Choi Hongsoo H Puigmartí-Luis Josep J Trassin Morgan M Nelson Bradley J BJ Chen Xiang-Zhong XZ Pané Salvador S

Nature communications 20230210 1

The shape recovery ability of shape-memory alloys vanishes below a critical size (~50 nm), which prevents their practical applications at the nanoscale. In contrast, ferroic materials, even when scaled down to dimensions of a few nanometers, exhibit actuation strain through domain switching, though the generated strain is modest (~1%). Here, we develop freestanding twisted architectures of nanoscale ferroic oxides showing shape-memory effect with a giant recoverable strain (>8%). The twisted geo ...[more]

PMID: 36765045

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Shape-memory effect in twisted ferroic nanocomposites.

Publications

Shape-memory effect in twisted ferroic nanocomposites.

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