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| Characterization of nano-structure materials |
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Prediction from the dual-phase nature of
superionic conductors both solid and liquid-likeis that
mobile ions in the material may experience reversible
extraction−reinsertion by an external electric field. However,
this type of pseudoelectroelasticity has not been confirmed in
situ, and no details on the microscopic mechanism are known.
Here, we in situ monitor the pseudoelectroelasticity of
monocrystalline Cu2S nanowires (NWs) using transmission
electron microscopy (TEM). Specifically, we reveal the atomic
scale details including phase transformation, migration and
redox reactions of Cu+ ions, nucleation, growth, as well as
spontaneous shrinking of Cu protrusion. Caterpillar-diffusiondominated
deformation is confirmed by the high-resolution transmission electron microscopy (HRTEM) observation and ab
initio calculation, which can be driven by either an external electric field or chemical potential difference. The observed springlike
behavior was creatively adopted for electric nanoactuators. Our findings are crucial to elucidate the mechanism of
pseudoelectroelasticity and could potentially stimulate in-depth research into electrochemical and nanoelectromechanical
systems. |
Spring-Like Pseudoelectroelasticity of Monocrystalline Cu2S Nanowire
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Publication: Qiubo Zhang, Zhe Shi,Kuibo Yin, et al. Spring-Like Pseudoelectroelasticity of Monocrystalline Cu2S
Nanowire[J]. NANO LETTERS, 2018, 18,5070-5077.
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