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Evaluation of Young's Modulus and Residual Stress of NiFe Film by Microbridge Testing 被引量:1
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作者 Zhimin ZHOU Yong ZHOU +5 位作者 Mingjun WANG Chunsheng YANG Ji'an CHEN Wen DING Xiaoyu GAO Taihua ZHANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2006年第3期345-348,共4页
Microbridge testing was used to measure the Young's modulus and residual stress of metallic films. Samples of freestanding NiFe film microbridge were fabricated by microelectromechanical systems. Special ceramic shaf... Microbridge testing was used to measure the Young's modulus and residual stress of metallic films. Samples of freestanding NiFe film microbridge were fabricated by microelectromechanical systems. Special ceramic shaft structure was designed to solve the problem of getting the load-deflection curve of NiFe film microbridge by the Nanoindenter XP system with normal Berkovich probe. Theoretical analysis of load-deflection curves of the microbridges was proposed to evaluate the Young's modulus and residual stress of the films simultaneously. The calculated results based on experimental measurements show that the average Young's modulus and residual stress for the electroplated NiFe films are 203.2 GPa and 333.0 MPa, respectively, while the Young's modulus measured by the Nano-hardness method is 209.6:1:11.8 GPa for the thick NiFe film with silicon substrate. 展开更多
关键词 Mechanical properties Metal thin film NANOINDENTATION
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MICROBRIDGE TESTING OF YOUNG'S MODULUS AND RESIDUAL STRESS OF NICKEL FILM ELECTROPLATED ON SILICON WAFER
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作者 Y.Zhou C.S.Yang +5 位作者 J.A. Chen G.F. Ding L. Wang M.J Wang Y.M Zhang T.H Zhang 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2004年第3期247-254,共8页
Microbridge testing is used to measure the Young's modulus and residual stresses of metallic films.Nickel film microbridges with widths of several hundred microns are fabricated by Microelectromechanical Systems.I... Microbridge testing is used to measure the Young's modulus and residual stresses of metallic films.Nickel film microbridges with widths of several hundred microns are fabricated by Microelectromechanical Systems.In order to measure the mechanical properties of nickel film microbridges,special shaft structure is designed to solve the problem of getting the load--deflection curves of metal film microbridge by Nanoin--denter XP system with normal Berkovich probe.Theoretical analysis of the micro--bridge load--deflection curve is proposed to evaluate the Young's modulus and residual stress of the films simultaneously.The calculated results based on the experimental measurements show that the average Young's modulus and residual stress are around 190GPa and 175MPa respectively,while the Young's modulus measured by Nano-hardness method on nickel film with silicon substrate is 186.8±7.34GPa. 展开更多
关键词 nickel film microbridge MEMS mechanical property loadeflection measurement
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High-Performance Li-ion Batteries and Super-capacitors Based on Prospective 1-D Nanomaterials 被引量:9
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作者 Dandan Zhao Ying Wang Yafei Zhang 《Nano-Micro Letters》 SCIE EI CAS 2011年第1期62-71,共10页
One-dimensional(1-D) nanomaterials with superior specific capacity, higher rate capability, better cycling peroperties have demonstrated significant advantages for high-performance Li-ion batteries and supercapacito... One-dimensional(1-D) nanomaterials with superior specific capacity, higher rate capability, better cycling peroperties have demonstrated significant advantages for high-performance Li-ion batteries and supercapacitors. This review describes some recent developments on the rechargeable electrodes by using 1-D nanomaterials(such as Li Mn2O4 nanowires, carbon nanofibers, Ni Mo O4 · n H2O nanorods, V2O5 nanoribbons,carbon nanotubes, etc.). New preparation methods and superior electrochemical properties of the 1-D nanomaterials including carbon nanotube(CNT), some oxides, transition metal compounds and polymers, and their composites are emphatically introduced. The VGCF/Li Fe PO4/C triaxial nanowire cathodes for Li-ion battery present a positive cycling performance without any degradation in almost theoretical capacity(160 m Ah/g).The Si nanowire anodes for Li-ion battery show the highest known theoretical charge capacity(4277 m Ah/g),that is about 11 times lager than that of the commercial graphite(372 m Ah/g). The SWCNT/Ni foam electrodes for supercapacitor display small equivalent series resistance(ESR, 52 m?) and impressive high power density(20 k W/kg). The advantages and challenges associated with the application of these materials for energy conversion and storage devices are highlighted. 展开更多
关键词 One-dimensional nanomaterials Li-ion battery SUPERCAPACITOR Electrochemical property
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Nanomaterials for Cardiac Tissue Engineering Application 被引量:2
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作者 Yachen Zhang Yong Tang +1 位作者 Ying Wang Liying Zhang 《Nano-Micro Letters》 SCIE EI CAS 2011年第4期270-277,共8页
In recent years, the emerging cardiac tissue engineering provides a new therapeutic method for heart diseases. And in the tissue engineering, the scaffold material which can mimic the structure of the extracellular ma... In recent years, the emerging cardiac tissue engineering provides a new therapeutic method for heart diseases. And in the tissue engineering, the scaffold material which can mimic the structure of the extracellular matrix properly is a key factor. The rapid expansion of nano-scaffolds during the past ten years has led to new perspectives and advances in biomedical research as well as in clinical practice. Here we search articles published in recent years extensively on cardiac tissue engineering scaffold materials and nanotechnology. And we review the traditional scaffold materials and the advances of the nano-scaffolds in cardiac tissue engineering. A thorough understanding of the nano-scaffolds would enable us to better exploit technologies to research the ideal scaffold material, and promote the cardiac tissue engineering using in the clinical practice as soon as possible. 展开更多
关键词 Cardiac tissue engineering Nano-scaffolds NANOMATERIALS
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A New Self-assembly Metal CMG Discriminator by Multi-exposure LiGA Like Process and Sacrificial Layer Process 被引量:1
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作者 张卫平 陈文元 +2 位作者 赵小林 丁桂甫 李胜勇 《Journal of Donghua University(English Edition)》 EI CAS 2005年第4期91-93,共3页
The counter-meshing gears (CMG) discriminator is a mechanically coded lock, which is used to prevent the occurrence of High Consequence Events. This paper advanced a new kind of self-assembly metal CMG discriminator... The counter-meshing gears (CMG) discriminator is a mechanically coded lock, which is used to prevent the occurrence of High Consequence Events. This paper advanced a new kind of self-assembly metal CMG discriminator based on multi-exposure LiGA like process and sacrificial layer process. The new CMG discriminator has the following characters except low cost: 1) it has only discrimination teeth sections; 2) the thickness of each gear layer exceeds one hundred micrometers; 3) it is axially driven by a separate dectronic magnetic micromotor directly; 4) its CMG is made of metal and is batch fabricated in the assembled state; 5) it is prevented from rotating in the opposite direction by pawl/ratchet wheel mechanism; 6) it has simpler structure. This device has better strength and reliability in abnormal environment compared to the existing surface micro machining (SMM) discriminator. 展开更多
关键词 Counter-meshing gears (CMG) discriminator multi-exposure LiGA like process sacrificial layer process.
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A new phenomenon of quantum-dot cellular automata
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作者 曾令刚 王庆康 戴永兵 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第10期1090-1094,共5页
If an external point charge and the movable charges of an isolated quantum-dot cellular automata (QCA) cell have the same polarity, the point charge greatly affects the polarization (P) of the cell only when it is in ... If an external point charge and the movable charges of an isolated quantum-dot cellular automata (QCA) cell have the same polarity, the point charge greatly affects the polarization (P) of the cell only when it is in a narrow band with periodically changing width. The center of the band is on a radius R circle. The ratio of R to the electric charge (q) is a constant determined by the parameters of the cell. A QCA cell can be used as charge detector based on the above phenomenon. 展开更多
关键词 Quantum-dot cellular automata (QCA) Quantum dot Hubbard-type Hamiltonian
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