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Ding, Feng
IBS - Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Theoretical methods development for materials studies.

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Ultralarge elastic deformation of nanoscale diamond

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Title
Ultralarge elastic deformation of nanoscale diamond
Author
Banerjee, AmitBernoulli, DanielZhang, HongtiYuen, Muk-FungLiu, JiabinDong, JichenDing, FengLu, JianDao, MingZhang, WenjunLu, YangSuresh, Subra
Issue Date
201804
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Citation
SCIENCE, v.360, no.6386, pp.300 - 302
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 (similar to 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 similar to 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.
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DOI
http://dx.doi.org/10.1126/science.aar4165
ISSN
0036-8075
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