期刊
NANO LETTERS
卷 14, 期 9, 页码 5201-5205出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl5019063
关键词
Core-shell nanowires; mechanical properties; shape restoration; electron beam; scanning electron microscopy
类别
资金
- EU ERDF project Centre of Excellence Mesosystems: Theory and Applications [TK114]
- ESF [2013/0015/1DP/1.1.1.2.0/13/APIA/VIAA/010]
- ETF [8420, 9007]
- Estonian Nanotechnology Competence Centre [EU29996]
- ERDF [3.2.1101.12-0028, 3.2.1101.12-0027, 3.2.1101.12-0010]
- ITMO International Research Laboratory Program
- [IUT2-25]
The combination of two different materials in a single composite core-shell heterostructure can lead to improved or even completely novel properties. In this work we demonstrate the enhancement of the mechanical properties of silver (Ag) nanowires (NW) achieved by coating them with a silica (SiO2) shell. In situ scanning electron microscope (SEM) nanomechanical tests of Ag-SiO2 core-shell nanowires reveal an improved fracture resistance and an electron-beam induced shape restoration effect. In addition, control experiments are conducted separately on uncoated Ag NWs and on empty SiO2 shells in order to gain deeper insight into the peculiar properties of Ag-SiO2. Test conditions are simulated using finite-element methods; possible mechanisms responsible for the shape restoration and the enhanced fracture resistance are discussed.
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