We successfully label-free and real-time detect the capture processes of human immunoglobulin G (IgG)/goat anti-human IgG and mouse IgG/goat anti-mouse IgG antigen-antibody pairs with different concentrations using th...We successfully label-free and real-time detect the capture processes of human immunoglobulin G (IgG)/goat anti-human IgG and mouse IgG/goat anti-mouse IgG antigen-antibody pairs with different concentrations using the oblique-incidence reflectivity difference (OIRD) method,and obtain the interaction kinetics curves and the interaction times.The experimental results prove that the OIRD method is a promising technique for label-free and real-time detection of the biomolecular interaction processes and achieving the quantitative information of interaction kinetics.展开更多
Superconducting MgB_(2) thin films were fabricated on Al_(2)O_(3)(0001)substrates under an ex situ processing conditions.Boron thin films were deposited by pulsed laser deposition followed by a post-annealing process....Superconducting MgB_(2) thin films were fabricated on Al_(2)O_(3)(0001)substrates under an ex situ processing conditions.Boron thin films were deposited by pulsed laser deposition followed by a post-annealing process.Resistance measurements of the deposited MgB_(2) films show Tc of~39 K,while scanning electron microscopy and x-ray diffraction analysis indicate that the films consist of well-crystallized grains with a highly c-axis-oriented structure.展开更多
Atomically regulated unit-cell by unit-cell homoepitaxial SrTiO_(3) and heteroepitaxial BaTiO_(3) films were fabricated on SrTiO_(3)(100)substrates by laser molecular beam epitaxy.The fine streak patterns and more tha...Atomically regulated unit-cell by unit-cell homoepitaxial SrTiO_(3) and heteroepitaxial BaTiO_(3) films were fabricated on SrTiO_(3)(100)substrates by laser molecular beam epitaxy.The fine streak patterns and more than 1000 cycles undamping intensity oscillation were obtained by in situ reflection high-energy electron diffraction with precisely controlled intermittence between each unit-cell layer.The surface morphology of the films was examined by atomic force microscopy.The root-mean-square surface roughness of the films is about 0.1 nm.展开更多
A pyrometric absorption method suitable for strongly absorbing films has been developed to monitor the YBa_(2)Cu_(3)O_(7-δ)film growth.This method makes use of the temperature difference between the heater and the su...A pyrometric absorption method suitable for strongly absorbing films has been developed to monitor the YBa_(2)Cu_(3)O_(7-δ)film growth.This method makes use of the temperature difference between the heater and the substrate.By deducing the absorption formula of radiation light and fitting it to the radiation intensity data measured,it is possible to monitor the film thickness and the film surface temperature during deposition.Experimental results show that this is a simple and practicable method.展开更多
Laser molecular beam epitaxy(laser MBE)technique was utilized to grow the barium titanate(BaTiO_(3),BTO)thin films on SrTiO_(3)(100)substrates.The surface morphology of the BaTiO_(3) thin films was studied by atomic f...Laser molecular beam epitaxy(laser MBE)technique was utilized to grow the barium titanate(BaTiO_(3),BTO)thin films on SrTiO_(3)(100)substrates.The surface morphology of the BaTiO_(3) thin films was studied by atomic force microscopy(AFM).Two-and three-dimensional AFM images were obtained.The root mean square surface roughness,the height profile,the histogram and the bearing ratio of the height distributions for the BaTiO_(3) thin films were analyzed in detail.The results indicate that the laser MBE thin films exhibit an atomically smooth surface.展开更多
The polarization dependence of conduction inf ersubband transitions in GaAs/AlGaAs step multiqua.ntum well structures hasJbeen studied using infrared spectroscopy.For S-polarized 45°oblique angle incidence config...The polarization dependence of conduction inf ersubband transitions in GaAs/AlGaAs step multiqua.ntum well structures hasJbeen studied using infrared spectroscopy.For S-polarized 45°oblique angle incidence configuration with respect to sample surface normal,the transverse electric(TE)active intersubband transitions were observed.Both transverse electric and transverse magnetic(TM)active intersubband transitions were obtained in P-polarized incidence at 45°angle on sample,which shows a small energy splitting between TE and TM absorption peaks.展开更多
Bicvystal Josephson junctions and direct current superconducting quantum inter ference devices(dc sQUIDs)were prepared on YBa_(2)Cu_(3)O_(7)(YBCO)thin films deposited on yttrium stabilized ZrO_(2) bicrystal substrates...Bicvystal Josephson junctions and direct current superconducting quantum inter ference devices(dc sQUIDs)were prepared on YBa_(2)Cu_(3)O_(7)(YBCO)thin films deposited on yttrium stabilized ZrO_(2) bicrystal substrates.The critical current densities J_(c)~2×10^(6)/cm^(2) for YBCO thin filmand(1-3)×10^(3)A/cm^(2) at boundaries were obtained at 77 K.For YBCO Josephson junctionmade on 28° misorientated boundary,the Shapiro steps were observed.The dc SQUID was madeon the 32° misorientated boundary junctions,which consisted of 40×40 m of loop and 2000×2000 pn planar superconductive flu.r focuser.The zoltage modulation depth of this SQUID was6 p.V,and the magnetic field sensitivity was estimated to be~2 pT/√Hz from the measurednoise level.展开更多
BaTiO_(3)(BTO)/YBa_(2)Cu_(3)O_(7) (YBCO) heteroepitaxial films have been fabricated on (100) SrTiO_(3) substrates by pulsed laser ablation. X-ray characterizations show the BTO/YBCO bilayer films have a highly epitaxi...BaTiO_(3)(BTO)/YBa_(2)Cu_(3)O_(7) (YBCO) heteroepitaxial films have been fabricated on (100) SrTiO_(3) substrates by pulsed laser ablation. X-ray characterizations show the BTO/YBCO bilayer films have a highly epitaxial nature. Rocking curves for the BTO (002) and YBCO (005) peaks have full width at half maximum values of 0.36°and 0.32°, respectively. The Ф scan plots indicate good in-plane alignments of these epitaxial films. The ferroelectric properties of the B TO/YBCO heteroepitaxial films were evaluated by capacitance-voltage measurement in metal-ferroelectric-metal configuration.展开更多
CaCu _(3)Ti_(4)O_(12)(CCTO)thin films were fabricated on ITO−covered MgO(100)substrates.The rectification characteristics were observed in the CCTO capacitance structure with Pt top electrodes at temperatures ranging ...CaCu _(3)Ti_(4)O_(12)(CCTO)thin films were fabricated on ITO−covered MgO(100)substrates.The rectification characteristics were observed in the CCTO capacitance structure with Pt top electrodes at temperatures ranging from 150 K to 330 K,which are attributed to the formation of a Schottky junction between n-type semiconducting CCTO and Pt due to the difference of their work functions.At low forward-bias voltage,the current-voltage characteristics of the Schottky junction follow J=JsD exp[qV/(k0T)].A strong decrease in ideality factor with the increasing temperature is obtained by linear fitting at the low bias voltage.展开更多
Voltage pulses of 90 V have been observed in YBa_(2)Cu_(3)O_(7-δ) films with a tilted orientation when they are illuminated by pulsed laser at room temperature.The signals result from the anisotropy of thermoelectric...Voltage pulses of 90 V have been observed in YBa_(2)Cu_(3)O_(7-δ) films with a tilted orientation when they are illuminated by pulsed laser at room temperature.The signals result from the anisotropy of thermoelectricity in the films.The thermoelectric signals related to the tilted angle are linear to the laser power and wavelength-independent.It is shown that the response of films to the mode-locked laser has a risetime less than 1ns and width less than 20 ns.The films with the superconducting transition temperature of 90K were prepared by laser ablation.展开更多
恒59S是湖南恒德种业科技有限公司以Y58S为母本与自育优质抗稻瘟病中间材料5739-5-6杂交,通过在湖南桃江和海南三亚连续6 a 12代的南北穿梭育种,利用人工低温和自然生态低温相结合进行育性筛选、田间和室内米质筛选、稻瘟病抗性表型鉴...恒59S是湖南恒德种业科技有限公司以Y58S为母本与自育优质抗稻瘟病中间材料5739-5-6杂交,通过在湖南桃江和海南三亚连续6 a 12代的南北穿梭育种,利用人工低温和自然生态低温相结合进行育性筛选、田间和室内米质筛选、稻瘟病抗性表型鉴定以及配合力测定,于2016年育成的水稻光温敏核不育系。2019年5月恒59S通过湖南省农作物品种审定委员会鉴定。恒59S所配组合恒两优金农丝苗米质达到部颁2级优质稻标准。展开更多
基金Supported by the National Basic Research Program of China under Grant No 2007CB935701.
文摘We successfully label-free and real-time detect the capture processes of human immunoglobulin G (IgG)/goat anti-human IgG and mouse IgG/goat anti-mouse IgG antigen-antibody pairs with different concentrations using the oblique-incidence reflectivity difference (OIRD) method,and obtain the interaction kinetics curves and the interaction times.The experimental results prove that the OIRD method is a promising technique for label-free and real-time detection of the biomolecular interaction processes and achieving the quantitative information of interaction kinetics.
基金Supported by a grant from the State Kay Program of China and the National Natural Science Foundation of China.
文摘Superconducting MgB_(2) thin films were fabricated on Al_(2)O_(3)(0001)substrates under an ex situ processing conditions.Boron thin films were deposited by pulsed laser deposition followed by a post-annealing process.Resistance measurements of the deposited MgB_(2) films show Tc of~39 K,while scanning electron microscopy and x-ray diffraction analysis indicate that the films consist of well-crystallized grains with a highly c-axis-oriented structure.
基金Supported by the National Natural Science Foundation of China under Grant Nos.69437010 and 59392800the Chinese Academy of Sciencesthe National Centre for R&D on Superconductivity of China.
文摘Atomically regulated unit-cell by unit-cell homoepitaxial SrTiO_(3) and heteroepitaxial BaTiO_(3) films were fabricated on SrTiO_(3)(100)substrates by laser molecular beam epitaxy.The fine streak patterns and more than 1000 cycles undamping intensity oscillation were obtained by in situ reflection high-energy electron diffraction with precisely controlled intermittence between each unit-cell layer.The surface morphology of the films was examined by atomic force microscopy.The root-mean-square surface roughness of the films is about 0.1 nm.
基金Supported by the National Centre for Research and Development on Superconductor of China.
文摘A pyrometric absorption method suitable for strongly absorbing films has been developed to monitor the YBa_(2)Cu_(3)O_(7-δ)film growth.This method makes use of the temperature difference between the heater and the substrate.By deducing the absorption formula of radiation light and fitting it to the radiation intensity data measured,it is possible to monitor the film thickness and the film surface temperature during deposition.Experimental results show that this is a simple and practicable method.
基金Supported by the National Natural Science Foundation of China under Grant Nos.59392800 and 69437101the Chinese Academy of Sciences,the National Superconducting Research Center,and the Research Grant No.94-189 RG/PHYS/AS of the Third World Academy of Sciences.
文摘Laser molecular beam epitaxy(laser MBE)technique was utilized to grow the barium titanate(BaTiO_(3),BTO)thin films on SrTiO_(3)(100)substrates.The surface morphology of the BaTiO_(3) thin films was studied by atomic force microscopy(AFM).Two-and three-dimensional AFM images were obtained.The root mean square surface roughness,the height profile,the histogram and the bearing ratio of the height distributions for the BaTiO_(3) thin films were analyzed in detail.The results indicate that the laser MBE thin films exhibit an atomically smooth surface.
基金Supported by the National Natural Science Foundation of China.
文摘The polarization dependence of conduction inf ersubband transitions in GaAs/AlGaAs step multiqua.ntum well structures hasJbeen studied using infrared spectroscopy.For S-polarized 45°oblique angle incidence configuration with respect to sample surface normal,the transverse electric(TE)active intersubband transitions were observed.Both transverse electric and transverse magnetic(TM)active intersubband transitions were obtained in P-polarized incidence at 45°angle on sample,which shows a small energy splitting between TE and TM absorption peaks.
基金Supported by the National Research and Development Cent er for Superconductivity.
文摘Bicvystal Josephson junctions and direct current superconducting quantum inter ference devices(dc sQUIDs)were prepared on YBa_(2)Cu_(3)O_(7)(YBCO)thin films deposited on yttrium stabilized ZrO_(2) bicrystal substrates.The critical current densities J_(c)~2×10^(6)/cm^(2) for YBCO thin filmand(1-3)×10^(3)A/cm^(2) at boundaries were obtained at 77 K.For YBCO Josephson junctionmade on 28° misorientated boundary,the Shapiro steps were observed.The dc SQUID was madeon the 32° misorientated boundary junctions,which consisted of 40×40 m of loop and 2000×2000 pn planar superconductive flu.r focuser.The zoltage modulation depth of this SQUID was6 p.V,and the magnetic field sensitivity was estimated to be~2 pT/√Hz from the measurednoise level.
基金the National Natural Science Foundation of China.
文摘BaTiO_(3)(BTO)/YBa_(2)Cu_(3)O_(7) (YBCO) heteroepitaxial films have been fabricated on (100) SrTiO_(3) substrates by pulsed laser ablation. X-ray characterizations show the BTO/YBCO bilayer films have a highly epitaxial nature. Rocking curves for the BTO (002) and YBCO (005) peaks have full width at half maximum values of 0.36°and 0.32°, respectively. The Ф scan plots indicate good in-plane alignments of these epitaxial films. The ferroelectric properties of the B TO/YBCO heteroepitaxial films were evaluated by capacitance-voltage measurement in metal-ferroelectric-metal configuration.
基金by the National Key Basic Research Program of China under Grant No 2011CB301802.
文摘CaCu _(3)Ti_(4)O_(12)(CCTO)thin films were fabricated on ITO−covered MgO(100)substrates.The rectification characteristics were observed in the CCTO capacitance structure with Pt top electrodes at temperatures ranging from 150 K to 330 K,which are attributed to the formation of a Schottky junction between n-type semiconducting CCTO and Pt due to the difference of their work functions.At low forward-bias voltage,the current-voltage characteristics of the Schottky junction follow J=JsD exp[qV/(k0T)].A strong decrease in ideality factor with the increasing temperature is obtained by linear fitting at the low bias voltage.
基金Supported in part by the Chinese National Center for Research and Development on Superconductivity,and Research Funds of Tsinghua University.
文摘Voltage pulses of 90 V have been observed in YBa_(2)Cu_(3)O_(7-δ) films with a tilted orientation when they are illuminated by pulsed laser at room temperature.The signals result from the anisotropy of thermoelectricity in the films.The thermoelectric signals related to the tilted angle are linear to the laser power and wavelength-independent.It is shown that the response of films to the mode-locked laser has a risetime less than 1ns and width less than 20 ns.The films with the superconducting transition temperature of 90K were prepared by laser ablation.
文摘恒59S是湖南恒德种业科技有限公司以Y58S为母本与自育优质抗稻瘟病中间材料5739-5-6杂交,通过在湖南桃江和海南三亚连续6 a 12代的南北穿梭育种,利用人工低温和自然生态低温相结合进行育性筛选、田间和室内米质筛选、稻瘟病抗性表型鉴定以及配合力测定,于2016年育成的水稻光温敏核不育系。2019年5月恒59S通过湖南省农作物品种审定委员会鉴定。恒59S所配组合恒两优金农丝苗米质达到部颁2级优质稻标准。
