Introduction Coumarines have been recently paid much attention for their physiological activities and fluorescent properties.They have outstanding optical properties,including high photostability,extended spectral ran...Introduction Coumarines have been recently paid much attention for their physiological activities and fluorescent properties.They have outstanding optical properties,including high photostability,extended spectral range,high quantum yield of photoluminescence.展开更多
Introduction Magnesium,abundant in natural resource,has many advantages.This make the magnesium alloys attractive as a substitute material of ferrous metals and aluminum alloys.However,there are some unsatisfactory ch...Introduction Magnesium,abundant in natural resource,has many advantages.This make the magnesium alloys attractive as a substitute material of ferrous metals and aluminum alloys.However,there are some unsatisfactory characteristics,which展开更多
Experimental Procedure Fig.1 shows the custom-made Cathode Multi Arc Ion equipment,which is made up of three pars:CCS (computer contral system,Fig.1′s left part),Vacuum Chamber (Fig.1′s middle part) and Air Pump par...Experimental Procedure Fig.1 shows the custom-made Cathode Multi Arc Ion equipment,which is made up of three pars:CCS (computer contral system,Fig.1′s left part),Vacuum Chamber (Fig.1′s middle part) and Air Pump parts (Fig.1′s right part).展开更多
Introduction With the remarkable properties in mechanical,electronic and magnetic,fabrication of carbon nanotube (CNT) arrays has drawn ever-increasing worldwide attention in application of field emission display (FED...Introduction With the remarkable properties in mechanical,electronic and magnetic,fabrication of carbon nanotube (CNT) arrays has drawn ever-increasing worldwide attention in application of field emission display (FED) and展开更多
Introduction During the last two decades,organic light-emitting diodes (OLED) have attracted considerable interest owing to their promising applications by replacing cathode ray tubes (CRTs) or liquid crystal displays...Introduction During the last two decades,organic light-emitting diodes (OLED) have attracted considerable interest owing to their promising applications by replacing cathode ray tubes (CRTs) or liquid crystal displays (LCDs).展开更多
Typically,highly p-doped(2×1018 cm-3)poly-Si films fabricated by the aluminum induced layer exchange(ALILE)process are not suitable for solar cell absorber layers.In this paper,the fabrication of high-quality,con...Typically,highly p-doped(2×1018 cm-3)poly-Si films fabricated by the aluminum induced layer exchange(ALILE)process are not suitable for solar cell absorber layers.In this paper,the fabrication of high-quality,continuous polycrystalline silicon(poly-Si)films with lower doping concentrations(2×1016 cm-3)using aluminum-induced crystallization(AIC)is reported.Secondary-ion-mass spectroscopy(SIMS)results showed that annealing at different temperature profiles leads to a variety of Al concentrations.Hall Effect measurements revealed that Al dopant concentration depends on the annealing temperature and temperature profile.Raman spectral analysis indicated that samples prepared via AIC contain some regions with small grains.展开更多
The effect of Pr substitution for Dy on the magnetic and magnetostrictive properties,anisotropy,spin reorientation and Mssbauer effect of a series of Tb0.3Dy0.7-xPrx(Fe0.9Al0.1)1.95(x=0,0.1,0.20,0.25,0.30,0.35)alloys ...The effect of Pr substitution for Dy on the magnetic and magnetostrictive properties,anisotropy,spin reorientation and Mssbauer effect of a series of Tb0.3Dy0.7-xPrx(Fe0.9Al0.1)1.95(x=0,0.1,0.20,0.25,0.30,0.35)alloys at room temperature have been investigated.It was found that a small amount of Pr substitution is beneficial to a decrease in the magnetocrystalline anisotropy for the Tb0.3Dy0.7-xPrx(Fe0.9Al0.1)1.95 alloys.The magnetostriction decreases drastically with increasing x and the magnetostrictive effect disappears for x>0.2.However,the magnetostriction exhibits a slightly bigger value at x=0.1 than the free alloys and is saturated more easily with the magnetic field H.The saturation magnetization and Curie temperature decrease monotonously,but the spontaneous magnetostriction increases linearly with increasing x,whereas the spin reorientation temperature increases first,then decreases rapidly and reaches the maximum at x=0.1.The analysis of Mssbauer spectra indicated that the easy magnetization direction in the{110}plane deviates slightly from the main axis of symmetry with the Pr concentration x,namely spin reorientation.Compared with Al substitution for Fe,the effect of Pr substitution for Dy on spin reorientation is relatively small.The hyperfine field increases with Pr concentration increasing,and the isomer shifts and the quadrupole splitting(QS)show weak concentration dependence.展开更多
文摘Introduction Coumarines have been recently paid much attention for their physiological activities and fluorescent properties.They have outstanding optical properties,including high photostability,extended spectral range,high quantum yield of photoluminescence.
文摘Introduction Magnesium,abundant in natural resource,has many advantages.This make the magnesium alloys attractive as a substitute material of ferrous metals and aluminum alloys.However,there are some unsatisfactory characteristics,which
基金This work was supported by the National Science Support Program （2006BAE04B05-3） MOE IRT （grant No. 06029）； National Science Foundation of China （grant No. 50505037）；863 Hi-Tech Program （grant No. 2006AA04Z322 ； ＂Qing Lan＂ Talent Engineering Funds by Lanzhou Jiaotong University）.
文摘Experimental Procedure Fig.1 shows the custom-made Cathode Multi Arc Ion equipment,which is made up of three pars:CCS (computer contral system,Fig.1′s left part),Vacuum Chamber (Fig.1′s middle part) and Air Pump parts (Fig.1′s right part).
基金This work was supported by 973 Basics Science Research Program （grant No. 2003CBT16203）the National Science Foundation of China （grant No. 50505037）+2 种基金 863 Hi-Tech Program （grant No. 2006AA04Z322 and No. 2006AA05Z411）Xi'An AM Foundation （grant No. XA-AM-200505 and No. XA-AM-200609 ）ShanXi Province Foundation （grant No. 2006E109).
文摘Introduction With the remarkable properties in mechanical,electronic and magnetic,fabrication of carbon nanotube (CNT) arrays has drawn ever-increasing worldwide attention in application of field emission display (FED) and
基金This work was supported by the National Science Support Program （2006BAE04B05-3）MOE Program for Changjiang Scholars and Innovative Research Team （grant No. 0629）+2 种基金National Science Foundation of China （grant No. 50505037）863 Hi-Teeh Program （grant No. 2006AA04Z322 ）＂Qing Lan＂ Talent Engineering Funds by Lanzhou Jiaotong University.
文摘Introduction During the last two decades,organic light-emitting diodes (OLED) have attracted considerable interest owing to their promising applications by replacing cathode ray tubes (CRTs) or liquid crystal displays (LCDs).
基金Supported by the Program for Changjiang Scholars of the Ministry of Education of Chinathe Innovative Research Team(Grant No.0629)+1 种基金the National High-Tech Research and Development Program of China(Grant No.2007AA11Z211)the"Qing Lan"Talent Engineering Funds by Lanzhou Jiaotong University(Grant No.2006A16)
文摘Typically,highly p-doped(2×1018 cm-3)poly-Si films fabricated by the aluminum induced layer exchange(ALILE)process are not suitable for solar cell absorber layers.In this paper,the fabrication of high-quality,continuous polycrystalline silicon(poly-Si)films with lower doping concentrations(2×1016 cm-3)using aluminum-induced crystallization(AIC)is reported.Secondary-ion-mass spectroscopy(SIMS)results showed that annealing at different temperature profiles leads to a variety of Al concentrations.Hall Effect measurements revealed that Al dopant concentration depends on the annealing temperature and temperature profile.Raman spectral analysis indicated that samples prepared via AIC contain some regions with small grains.
基金Supported by the National Natural Science Foundation of China(Grant No.10574059)the Natural Science Foundation of Gansu Province(Grant No.0710RJZA074)+1 种基金the Second Scientific Research Project of Bureau of Gansu Education‘Qing Lan’Talent Engineering Funds of Lanzhou Jiaotong University
文摘The effect of Pr substitution for Dy on the magnetic and magnetostrictive properties,anisotropy,spin reorientation and Mssbauer effect of a series of Tb0.3Dy0.7-xPrx(Fe0.9Al0.1)1.95(x=0,0.1,0.20,0.25,0.30,0.35)alloys at room temperature have been investigated.It was found that a small amount of Pr substitution is beneficial to a decrease in the magnetocrystalline anisotropy for the Tb0.3Dy0.7-xPrx(Fe0.9Al0.1)1.95 alloys.The magnetostriction decreases drastically with increasing x and the magnetostrictive effect disappears for x>0.2.However,the magnetostriction exhibits a slightly bigger value at x=0.1 than the free alloys and is saturated more easily with the magnetic field H.The saturation magnetization and Curie temperature decrease monotonously,but the spontaneous magnetostriction increases linearly with increasing x,whereas the spin reorientation temperature increases first,then decreases rapidly and reaches the maximum at x=0.1.The analysis of Mssbauer spectra indicated that the easy magnetization direction in the{110}plane deviates slightly from the main axis of symmetry with the Pr concentration x,namely spin reorientation.Compared with Al substitution for Fe,the effect of Pr substitution for Dy on spin reorientation is relatively small.The hyperfine field increases with Pr concentration increasing,and the isomer shifts and the quadrupole splitting(QS)show weak concentration dependence.
