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- 저자 : Debin Jiang (검색결과 2 건)
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Influence of heat treatment on complex-shape rotating disk subjected to isothermal precision forging
Yanqiu Zhang,Shuyong Jiang,Xiaoming Zhu,Yanan Zhao,Debin Shan 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.1
Influence of heat treatment on the mechanical properties of the forging was systematically investigated according to tensile test, hardness test and electrical conductivity test. Simultaneously, typical microstructures of the 7A09 aluminum alloy samples subjected to various solution temperatures and aging regimes were characterized by means of Transmission electron microscope (TEM) and Scanning electron microscope (SEM). In the case of the different solution temperatures, the size of precipitations increases with the increase in the solution temperature, which contributes to improving both strength and stress corrosion resistance of the forging. The solution temperature of 465 °C leads to the well comprehensive mechanical properties and the superior stress corrosion resistance of the forging. G.P. zone, η' phase and η phase are able to precipitate in the matrix of the forging in the case of different aging regimes, such as peak aging, two-stage overaging, two-stage aging, and regression and re-aging. The precipitation phases play an important role in enhancing the mechanical properties of the forging as an obstacle against the dislocation movement.
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Linfen Xu,Ling liu,Xiaoyan Zhao,Jinyu Lin,Shaohan Xu,Jinlian He,Debin Jiang,Yong Xia The Korean Electrochemical Society 2023 Journal of electrochemical science and technology Vol.14 No.1
The effective detection of human chorionic gonadotropin (HCG) is considerably important for the clinical diagnosis of both of early pregnancy and nonpregnancy-related diseases. In this work, a simple and sensitive electrochemical sandwich-type immunosensing platform was designed by synthesizing b-cyclodextrin (CD) functionalized graphene (CD/GN) hybrid as simultaneously sensing platform and signal transducer coupled with rhodamine b (RhB) as probe. In brief, GN offers large surface area and high conductivity, while CD exhibits superior host-guest recognition capability, thus the primary antibody (Ab1) of HCG can be bound into the cavities of CD/GN to form stable Ab1/CD/GN inclusion complex; meanwhile, the secondary antibody (Ab2) and RhB can also enter into the cavities, producing RhB/Ab2/CD/GN complex. Then, by using Ab1/CD/GN as sensing platform and RhB/Ab2/CD/GN as signal transducer (in which RhB was signal probe), a simple sandwich-type immunosensor was constructed. Under the optimum parameters, the designed immunosensor exhibited a considerable low analytical detection of 1.0 pg mL<sup>-1</sup> and a wide linearity of 0.002 to 10.0 ng mL<sup>-1</sup> for HCG, revealing the developed sandwich-type electrochemical immunosensing platform offered potential real applications for the determination of HCG.
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