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Title: Ultralarge elastic deformation of nanoscale diamond
Authors: Banerjee, Amit
Bernoulli, Daniel
Zhang, Hongti
Yuen, Muk-Fung
Liu, Jiabin
Dong, Jichen
Ding, Feng
Lu, Jian
Dao, Ming
Zhang, Wenjun
Lu, Yang
Suresh, Subra
Keywords: Engineering::Materials
Issue Date: 2018
Source: Banerjee, A., Bernoulli, D., Zhang, H., Yuen, M.-F., Liu, J., Dong, J., . . ., Suresh, S. (2018). Ultralarge elastic deformation of nanoscale diamond. Science, 360(6386), 300-302. doi:10.1126/science.aar4165
Journal: Science
Abstract: Diamonds have substantial hardness and durability, but attempting to deform diamonds usually results in brittle fracture. We demonstrate ultralarge, fully reversible elastic deformation of nanoscale (~300 nanometers) single-crystalline and polycrystalline diamond needles. For single-crystalline diamond, the maximum tensile strains (up to 9%) approached the theoretical elastic limit, and the corresponding maximum tensile stress reached ~89 to 98 gigapascals. After combining systematic computational simulations and characterization of pre- and postdeformation structural features, we ascribe the concurrent high strength and large elastic strain to the paucity of defects in the small-volume diamond nanoneedles and to the relatively smooth surfaces compared with those of microscale and larger specimens. The discovery offers the potential for new applications through optimized design of diamond nanostructure, geometry, elastic strains, and physical properties.
ISSN: 0036-8075
DOI: 10.1126/science.aar4165
Schools: School of Materials Science & Engineering 
Rights: © 2018 The Authors. All rights reserved. This paper was published in Science and is made available with permission of The Authors.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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