期刊
ADVANCED MATERIALS INTERFACES
卷 3, 期 16, 页码 -出版社
WILEY
DOI: 10.1002/admi.201600017
关键词
atomic layer deposition; block copolymers; gas sensors; gyroidal ZnO nanostructures; template synthesis
资金
- National Basic Research Program of China [2015CB655301]
- Jiangsu Natural Science Foundation [BK20150063]
- Natural Science Research Program of the Jiangsu Higher Education Institutions [13KJA430005]
- Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
3D gyroidal networks of ZnO nanorods or nanotubes are synthesized by replicating block copolymer (BCP) templates with gyroidal nanopores via atomic layer deposition (ALD). The generation of 3D ZnO nanorods or nanotubes depends on the thicknesses of deposited ZnO layers, which can be easily and precisely controlled by adjusting ALD cycles. The as-obtained ZnO nanostructures have porosities as high as 77% for gyroidal nanorods and 86% for gyroidal nanotubes due to their unique interconnected structures and rough surfaces. Both gyroidal ZnO nanostructures are used as vapor sensors to detect ethanol with different concentrations. Gyroidal ZnO nanotubes show higher ethanol sensitivity than nanorods because of the inherently interconnected nanotubes and larger porosity. Gyroidal ZnO nanotubes can also act as formaldehyde sensors with the sensitivity as high as 42 to 50 ppm formaldehyde, which is much higher than previously reported sensors based on ZnO nanorods or nanotubes.
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