6533b857fe1ef96bd12b4426
RESEARCH PRODUCT
Enhanced flexibility and electron-beam-controlled shape recovery in alumina-coated Au and Ag core–shell nanowires
Aivar TarreTõnis ArrovalSven OrasMagnus MetsSergei VlassovJaan AarikMikk AntsovMikk VahtrusRünno LõhmusBoris Polyakovsubject
Yield (engineering)Materials scienceMechanical EngineeringComposite numberNanowireBioengineering02 engineering and technologyGeneral ChemistryElectronengineering.material010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencesCore (optical fiber)Atomic layer depositionCoatingMechanics of MaterialsengineeringCathode rayGeneral Materials ScienceElectrical and Electronic EngineeringComposite material0210 nano-technologydescription
The proper choice of coating materials and methods in core–shell nanowire (NW) engineering is crucial to assuring improved characteristics or even new functionalities of the resulting composite structures. In this paper, we have reported electron-beam-induced reversible elastic-to-plastic transition in Ag/Al2O3 and Au/Al2O3 NWs prepared by the coating of Ag and Au NWs with Al2O3 by low-temperature atomic layer deposition. The observed phenomenon enabled freezing the bent core–shell NW at any arbitrary curvature below the yield strength of the materials and later restoring its initially straight profile by irradiating the NW with electrons. In addition, we demonstrated that the coating efficiently protects the core material from fracture and plastic yield, allowing it to withstand significantly higher deformations and stresses in comparison to uncoated NW.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-11-01 | Nanotechnology |