Unprecedented Superelasticity in Mo17O47/MoS2 Core-Shell Nanowires
Zhongliang Yu1,2,3, Wenqing Zhu4,5, Bowen Liu1,3
1CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing, 100190, China.
Advanced Materials (Deerfield Beach, Fla.)
|June 18, 2025
Summary
Researchers discovered [001]-oriented Molybdenum-17-oxide-47 (Mo17O47) nanowires with a Molybdenum disulfide (MoS2) shell exhibiting exceptional superelasticity. These inorganic nanowires can withstand significant bending without permanent deformation, paving the way for advanced flexible devices.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Physics
Background:
- Inorganic materials typically exhibit high modulus and brittleness.
- Superelasticity in inorganic nanowires is highly sought after for advanced applications.
Purpose of the Study:
- To report the discovery of [001]-oriented Molybdenum-17-oxide-47 (Mo17O47) nanowires with a Molybdenum disulfide (MoS2) shell.
- To characterize the superelastic deformability of these novel inorganic nanowires.
Main Methods:
- Three-point bending tests to measure elastic modulus.
- In situ bending tests using scanning electron microscopy.
- Finite element simulations to analyze mechanical behavior.
- First-principles calculations (density functional theory) to understand deformation mechanisms.
Main Results:
- Mo17O47 nanowires exhibit an elastic modulus of 103 GPa in the [001] direction.
- The nanowires sustain repeated bending strains up to 35% without residual deformation.
- Superelasticity is attributed to the reversible transformation between chemical and van der Waals bonding in the [001] direction.
Conclusions:
- The [001]-oriented Mo17O47 nanowires with a MoS2 shell demonstrate unprecedented superelasticity for inorganic materials.
- This remarkable property offers significant potential for applications in flexible electronics and photonic devices.
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