Responsive nanoporous metals: recoverable modulations on strength and shape by watering

doi:10.1088/0957-4484/27/32/325501

IMR OpenIR

	Responsive nanoporous metals: recoverable modulations on strength and shape by watering
	Ye,Xing-Long; Liu,Ling-Zhi; Jin,Hai-Jun
	2016-06-27
发表期刊	Nanotechnology
ISSN	0957-4484
卷号	27 期号:32
摘要	Abstract Many biological materials can readily modulate their mechanical properties and shape by interacting with water in the surrounding environment, which is essential to their high performance in application. In contrast, typical inorganic materials (such as the metals) cannot change their strength and shape without involving thermal/mechanical treatments. By introducing nano-scale porous structure and exploiting a simple physical concept—the water-capillarity in nanopores, here we report that a ‘dead’ metal can be transformed into a ‘smart’ material with water-responsive properties. We demonstrate that the apparent strength, volume and shape of nanoporous Au and Au(Pt) can be modulated in situ, dramatically and recoverably, in response to water-dipping and partial-drying. The amplitude of strength-modulation reaches 20 MPa, which is nearly 50% of the yield strength at initial state. This approach also leads to reversible length change up to 1.3% in nanoporous Au and a large reversible bending motion of a bi-layer strip with tip displacement of ～20 mm, which may be used for actuation. This method is simple and effective, occurring in situ under ambient conditions and requiring no external power, analogous to biological materials. The findings may open up novel applications in many areas such as micro-robotics and bio-medical devices.
关键词	nanoporous metals capillarity actuation tunable strength water
DOI	10.1088/0957-4484/27/32/325501
语种	英语
WOS记录号	IOP:0957-4484-27-32-325501
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/80937
作者单位	Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
推荐引用方式 GB/T 7714	Ye,Xing-Long,Liu,Ling-Zhi,Jin,Hai-Jun. Responsive nanoporous metals: recoverable modulations on strength and shape by watering[J]. Nanotechnology,2016,27(32).
APA	Ye,Xing-Long,Liu,Ling-Zhi,&Jin,Hai-Jun.(2016).Responsive nanoporous metals: recoverable modulations on strength and shape by watering.Nanotechnology,27(32).
MLA	Ye,Xing-Long,et al."Responsive nanoporous metals: recoverable modulations on strength and shape by watering".Nanotechnology 27.32(2016).