期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 30, 页码 25644-25651出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b06962
关键词
nanocrack; transfer printing; notch; surface-enhanced Raman scattering; humidity sensing
资金
- Natural Science Foundation of China [51711540298, 61628401, U1632115, 51602056]
- Science and Technology Commission of Shanghai Municipality [17JC1401700]
- National Key Technologies R&D Program of China [2015ZX02102-003]
- Changjiang Young Scholars Program of China
- China Postdoctoral Science Foundation [2015M581523]
- International Postdoctoral Exchange Fellowship Program - Office of China Postdoctoral Council
Manipulating nanocracks to produce various nanodevices has attracted increasing interest. Here, based on the mature transfer printing technique, a novel notch-assisted transfer printing technique was engaged to produce nanocracks by simply introducing notch structures into the transferred nanomembranes. Both experiments and finite element simulations were used to elucidate the probability of nanocrack formation during the transfer process, and the results demonstrated that the geometry of nanomembranes played a key role in concentrating stress and producing nanocracks. We further demonstrated that the obtained nanocrack can be used as a surface-enhanced Raman scattering substrate because of the significant enhancement of electric fields. In addition, the capillary condensation of water molecules in the nanocrack led to an obvious change of resistance, thus providing an opportunity for the crack-based structure to be used as an ultrasensitive humidity sensor. The current approach can be applied to producing nanocracks from multiple materials and will have important applications in the field of nanodevices.
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