Inorganic lead-free double perovskites have the advantages of low toxicity,broadband emission,and good stability,which make them promising luminescent materials for lighting applications.However,due to the limited reg...Inorganic lead-free double perovskites have the advantages of low toxicity,broadband emission,and good stability,which make them promising luminescent materials for lighting applications.However,due to the limited regulation of their self-trapped exciton emission,it is still greatly challenging to achieve white light emitting from a single double perovskite host.Herein,efficient and tunable white light is realized in Cs_(2)NalnCl_(6)∶Sb^(3+),Tb^(3+),Sm^(3+)double perovskite by controlling the ratios of the doped three ions with blue,green,and red emissions,respectively.The steady-state and transient fluorescence spectra of singly-and doubly-doped double perovskites reveal the existence of multiple energy transfer channels in the triply-doped phosphors,including from Sb^(3+)to Tb^(3+),Sb^(3+)to Sm^(3+),and Tb^(3+)to Sm^(3+).Benefiting from these channels,the color coordinates of the triply-doped phosphors can cross the whole white light area of the CIE chromaticity diagram by adjusting the ratios of the three dopants,and the maximum internal quantum yield of the white light phosphors is 66.61%.The white emission phosphors show the characteristic of being independent of excitation wavelength within 310-360 nm.Furthermore,the emission intensity at 430 K of the white light phosphor Cs_(2)NalnCl_(6)∶0.01Sb^(3+),0.65Tb^(3+),0.20Sm^(3+)remains 50% of that at room temperature.A WLED device fabricated with the phosphor and a 365 nm LED chip exhibits a high color rendering index of 90.9,correlated color temperature of 5469 K,and CIE coordinates of(0.333 and 0.328).The results indicate that the as-prepared double perovskite materials are promising candidates in the solid-state lighting field.展开更多
The design of anode materials with a high specific capacity,high cyclic stability,and superior rate performance is required for the practical applications of sodium-ion batteries(SIBs).In this regard,we introduce in t...The design of anode materials with a high specific capacity,high cyclic stability,and superior rate performance is required for the practical applications of sodium-ion batteries(SIBs).In this regard,we introduce in this work a facile,low-cost and scalable method for the synthesis of nanocomposites of amorphous molybdenum sulfide(a-MoS_(x))and hierarchical porous carbon and have systematically investigated their performance for sodium ion storage.In the synthesis,ammonium molybdate tetrahydrate and thioacetamide are used as molybdenum and sulfur sources,respectively,with abundant corn starch as the carbon source and KOH as an activation agent.A simple pyrolysis of their mixtures leads to the formation of nanocomposites with a-MoS_(x)embedded within a hierarchical porous carbon(MoS_(x)@HPC),which are featured with a high surface area of up to 518.4 m^(2) g^(-1)and hierarchical pores ranging from micropores to macropores.It has also been shown that the annealing of MoS_(x)@HPC results in the formation of crystalline MoS_(2)nanosheets anchored in the hierarchical porous carbon matrix(MoS_(2)@HPC).The as-prepared nanocomposite MoS_(x)@HPC1 at an optimum carbon content of 32 wt%delivers a high specific sodium storage capacity of 599 mAh g^(-1)at 0.2 A g^(-1)and a high-rate performa nce with a retained capacity of 289 mAh g^(-1)at 5 A g^(-1).A comparison of the electrochemical performances of MoS_(x)@HPC and MoS_(2)@HPC demonstrates the superior specific capacity,rate performance,and charge transfer kinetics of the former,highlighting the unique advantageous role of amorphous MoS_(x)relative to crystalline MoS_(2).展开更多
A multistage amplifier system based on high-power end-pumped two-segmented Nd:YVO4is developed,which realizes the effective beam quality management in high-power lasers.Because of the severe thermal effect caused by h...A multistage amplifier system based on high-power end-pumped two-segmented Nd:YVO4is developed,which realizes the effective beam quality management in high-power lasers.Because of the severe thermal effect caused by high-power end pumping,both the appropriate crystal and beam filling factor(the ratio of the laser beam radius to the pump beam radius)are important in the amplifier.The multisegmented doped crystal is controlled in cooperation with the beam filling factor to realize high output power and maintain good beam quality.To study the thermal effect in the end-pumped crystal,the temperature distributions of end-pumped single-segmented and two-segmented Nd:YVO4are theoretically calculated.In the experiment,a probe laser is employed to measure the spherical aberration coefficient and the beam quality of the laser at the rear end of the two end-pumped crystals,respectively,and the experimental results are in good agreement with the theoretical results.In the power amplification,a seed laser is employed in the experiment.The appropriate gain medium and beam filling factor are determined by considering the spherical aberration coefficient,beam quality,and power extraction efficiency.Based on the reasonable layout of the power amplification for each stage amplifier,the multistage amplifier system outputs a 280.2 W picosecond laser with the beam quality factors of M_(x)^(2)=1.28 and M_(y)^(2)=1.32.展开更多
Focal segmental glomerulosclerosis （FSGS） is a histologically identifiable gtomerular injury often leading to proteinuria and renal failure. To identify its causal genes, whole-exome sequencing and Sanger sequencing...Focal segmental glomerulosclerosis （FSGS） is a histologically identifiable gtomerular injury often leading to proteinuria and renal failure. To identify its causal genes, whole-exome sequencing and Sanger sequencing were performed on a large Chinese cohort that comprised 40 FSGS families, 50 sporadic FSGS patients, 9 independent autosomal recessive Atport＇s syndrome （ARAS） patients, and 190 ethnically matched healthy controls. Patients with extrarenal manifestations, indicating systemic diseases or other known hereditary renal diseases, were excluded. Heterozygous COL4A3 mutations were identified in five （12.5%） FSGS families and one （2%） sporadic FSGS patient. All identified mutations disrupted highly conserved protein sequences and none of them was found in either public databases or the 190 healthy controls. Of the FSGS patients with heterozygous COL4A3 mutations, segmental thinning of the glomerular base membrane （GBM） was only detected in the patient with electronic microscopy examination results available. Five ARAS patients （55.6%） had homozygous or compound-heterozygous mutations in COL4.43 or COL4A4. Serious changes in the G BM, hearing loss, and ocular abnormalities were found in 100%, 80%, and 40% of the ARAS patients, respectively. Overall, a new sub- group of FSGS patients resulting from heterozygous C01.4A3 mutations was identified. The mutations are relatively frequent in famiUes diagnosed with inherited forms of FSGS. Thus, we suggest screening for C01.4A3 mutations in familial FSGS patients.展开更多
An immersed liquid cooling slab laser is demonstrated with deionized water as the coolant and a Nd:YAG slab as the gain medium.Using waveguides,a highly uniform pump beam distribution is achieved,and the flow velocity...An immersed liquid cooling slab laser is demonstrated with deionized water as the coolant and a Nd:YAG slab as the gain medium.Using waveguides,a highly uniform pump beam distribution is achieved,and the flow velocity distribution is also optimized in the channels of the gain module(GM).At various flow velocities,the convective heat transfer coefficient(CHTC)is obtained.Experimentally,a maximum output power of 434 W is obtained with an optical–optical efficiency of 27.1%and a slope efficiency of 36.6%.To the best of our knowledge,it is the highest output power of an immersed liquid cooling laser oscillator with a single Nd:YAG slab.展开更多
In this article,there were two annotation mistakes about the precise deletion position in COL4A3 and COL4A4 mutations in ARAS patients(summarized in Figure 2E).This was caused by a bug in the old version(v3.4)of Varia...In this article,there were two annotation mistakes about the precise deletion position in COL4A3 and COL4A4 mutations in ARAS patients(summarized in Figure 2E).This was caused by a bug in the old version(v3.4)of Variant Caller for Ion Torrent.The variant in family AP5 should be described as‘chr2:227942771delG’,instead of‘chr:227942770delG’,in the COL4A4 gene.The variant identified in family AP1 should be described as‘chr2:228172490delA’,instead of‘chr:228172489delA’,in the COL4A3 gene.The corrected Figure 2E is shown as below.The results and conclusions of the article are not affected,and the authors apologize for these errors.展开更多
基金supported by grants from the National Natural Science Foundation of China(NSFC Nos.51972347 and 21771195).
文摘Inorganic lead-free double perovskites have the advantages of low toxicity,broadband emission,and good stability,which make them promising luminescent materials for lighting applications.However,due to the limited regulation of their self-trapped exciton emission,it is still greatly challenging to achieve white light emitting from a single double perovskite host.Herein,efficient and tunable white light is realized in Cs_(2)NalnCl_(6)∶Sb^(3+),Tb^(3+),Sm^(3+)double perovskite by controlling the ratios of the doped three ions with blue,green,and red emissions,respectively.The steady-state and transient fluorescence spectra of singly-and doubly-doped double perovskites reveal the existence of multiple energy transfer channels in the triply-doped phosphors,including from Sb^(3+)to Tb^(3+),Sb^(3+)to Sm^(3+),and Tb^(3+)to Sm^(3+).Benefiting from these channels,the color coordinates of the triply-doped phosphors can cross the whole white light area of the CIE chromaticity diagram by adjusting the ratios of the three dopants,and the maximum internal quantum yield of the white light phosphors is 66.61%.The white emission phosphors show the characteristic of being independent of excitation wavelength within 310-360 nm.Furthermore,the emission intensity at 430 K of the white light phosphor Cs_(2)NalnCl_(6)∶0.01Sb^(3+),0.65Tb^(3+),0.20Sm^(3+)remains 50% of that at room temperature.A WLED device fabricated with the phosphor and a 365 nm LED chip exhibits a high color rendering index of 90.9,correlated color temperature of 5469 K,and CIE coordinates of(0.333 and 0.328).The results indicate that the as-prepared double perovskite materials are promising candidates in the solid-state lighting field.
基金financially supported by grants from the Natural Science and Engineering Research Council of Canada(Grant#RGPIN-2020-05546)。
文摘The design of anode materials with a high specific capacity,high cyclic stability,and superior rate performance is required for the practical applications of sodium-ion batteries(SIBs).In this regard,we introduce in this work a facile,low-cost and scalable method for the synthesis of nanocomposites of amorphous molybdenum sulfide(a-MoS_(x))and hierarchical porous carbon and have systematically investigated their performance for sodium ion storage.In the synthesis,ammonium molybdate tetrahydrate and thioacetamide are used as molybdenum and sulfur sources,respectively,with abundant corn starch as the carbon source and KOH as an activation agent.A simple pyrolysis of their mixtures leads to the formation of nanocomposites with a-MoS_(x)embedded within a hierarchical porous carbon(MoS_(x)@HPC),which are featured with a high surface area of up to 518.4 m^(2) g^(-1)and hierarchical pores ranging from micropores to macropores.It has also been shown that the annealing of MoS_(x)@HPC results in the formation of crystalline MoS_(2)nanosheets anchored in the hierarchical porous carbon matrix(MoS_(2)@HPC).The as-prepared nanocomposite MoS_(x)@HPC1 at an optimum carbon content of 32 wt%delivers a high specific sodium storage capacity of 599 mAh g^(-1)at 0.2 A g^(-1)and a high-rate performa nce with a retained capacity of 289 mAh g^(-1)at 5 A g^(-1).A comparison of the electrochemical performances of MoS_(x)@HPC and MoS_(2)@HPC demonstrates the superior specific capacity,rate performance,and charge transfer kinetics of the former,highlighting the unique advantageous role of amorphous MoS_(x)relative to crystalline MoS_(2).
基金supported by the National Natural Science Foundation of China(No.62105179)the National Key R&D Program of China(No.2023YFE0199000)the Baima Lake Laboratory Joint Funds of the Zhejiang Provincial Natural Science Foundation of China(No.LBMHZ24F050001)。
文摘A multistage amplifier system based on high-power end-pumped two-segmented Nd:YVO4is developed,which realizes the effective beam quality management in high-power lasers.Because of the severe thermal effect caused by high-power end pumping,both the appropriate crystal and beam filling factor(the ratio of the laser beam radius to the pump beam radius)are important in the amplifier.The multisegmented doped crystal is controlled in cooperation with the beam filling factor to realize high output power and maintain good beam quality.To study the thermal effect in the end-pumped crystal,the temperature distributions of end-pumped single-segmented and two-segmented Nd:YVO4are theoretically calculated.In the experiment,a probe laser is employed to measure the spherical aberration coefficient and the beam quality of the laser at the rear end of the two end-pumped crystals,respectively,and the experimental results are in good agreement with the theoretical results.In the power amplification,a seed laser is employed in the experiment.The appropriate gain medium and beam filling factor are determined by considering the spherical aberration coefficient,beam quality,and power extraction efficiency.Based on the reasonable layout of the power amplification for each stage amplifier,the multistage amplifier system outputs a 280.2 W picosecond laser with the beam quality factors of M_(x)^(2)=1.28 and M_(y)^(2)=1.32.
基金This workwas supported by grants from the National Basic Research Program of China 973, grant no. 2012CB517600 （no. 2012CB517604）, the National Natural Science Foundation of China （no. 81030015, 81070568, 81370015, and 81000295）, the International Cooperation and Exchange Projects of Shanghai Science and Technology Committee （no. 14430721000）, and the Chinese Medical Association Clinical Research Special Fund （no. 13030280413）.
文摘Focal segmental glomerulosclerosis （FSGS） is a histologically identifiable gtomerular injury often leading to proteinuria and renal failure. To identify its causal genes, whole-exome sequencing and Sanger sequencing were performed on a large Chinese cohort that comprised 40 FSGS families, 50 sporadic FSGS patients, 9 independent autosomal recessive Atport＇s syndrome （ARAS） patients, and 190 ethnically matched healthy controls. Patients with extrarenal manifestations, indicating systemic diseases or other known hereditary renal diseases, were excluded. Heterozygous COL4A3 mutations were identified in five （12.5%） FSGS families and one （2%） sporadic FSGS patient. All identified mutations disrupted highly conserved protein sequences and none of them was found in either public databases or the 190 healthy controls. Of the FSGS patients with heterozygous COL4A3 mutations, segmental thinning of the glomerular base membrane （GBM） was only detected in the patient with electronic microscopy examination results available. Five ARAS patients （55.6%） had homozygous or compound-heterozygous mutations in COL4.43 or COL4A4. Serious changes in the G BM, hearing loss, and ocular abnormalities were found in 100%, 80%, and 40% of the ARAS patients, respectively. Overall, a new sub- group of FSGS patients resulting from heterozygous C01.4A3 mutations was identified. The mutations are relatively frequent in famiUes diagnosed with inherited forms of FSGS. Thus, we suggest screening for C01.4A3 mutations in familial FSGS patients.
基金supported by the National Natural Science Foundation of China(No.62105179)the Joint Funds of the Zhejiang Provincial Natural Science Foundation(No.LZY21F050001)the Quzhou Science and Technology Plan Project(Nos.2022K87 and 2021K40).
文摘An immersed liquid cooling slab laser is demonstrated with deionized water as the coolant and a Nd:YAG slab as the gain medium.Using waveguides,a highly uniform pump beam distribution is achieved,and the flow velocity distribution is also optimized in the channels of the gain module(GM).At various flow velocities,the convective heat transfer coefficient(CHTC)is obtained.Experimentally,a maximum output power of 434 W is obtained with an optical–optical efficiency of 27.1%and a slope efficiency of 36.6%.To the best of our knowledge,it is the highest output power of an immersed liquid cooling laser oscillator with a single Nd:YAG slab.
文摘In this article,there were two annotation mistakes about the precise deletion position in COL4A3 and COL4A4 mutations in ARAS patients(summarized in Figure 2E).This was caused by a bug in the old version(v3.4)of Variant Caller for Ion Torrent.The variant in family AP5 should be described as‘chr2:227942771delG’,instead of‘chr:227942770delG’,in the COL4A4 gene.The variant identified in family AP1 should be described as‘chr2:228172490delA’,instead of‘chr:228172489delA’,in the COL4A3 gene.The corrected Figure 2E is shown as below.The results and conclusions of the article are not affected,and the authors apologize for these errors.
