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Microstructure Evolution and Growth Orientation of Directionally Solidified Mg–4 wt% Zn Alloy with Different Growth Rates 认领 引用 被引量：6
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作者 Hong-Min Jia Xiao-Hui Feng Yuan-Sheng Yang 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2017年第12期1185-1191,共7页
The microstructure evolution and growth orientation of directionally solidified Mg-4 wt% Zn alloy in the growth rate range from 20 to 200μm/s were investigated. A typical cellular structure was observed with a growth... The microstructure evolution and growth orientation of directionally solidified Mg-4 wt% Zn alloy in the growth rate range from 20 to 200μm/s were investigated. A typical cellular structure was observed with a growth rate of 20 μm/s, and the cellular spacing was 115 μm. When the growth rate increased to 60 μm/s, cellular structure with some developed perturbations was obtained and the cellular spacing was 145 μm, suggesting that the cell-to-dendrite transition happened at the growth rate lower than 60 μm/s. As the growth rate further increased, the microstructure was dendritic and the primary dendritic arm spacing decreased. The relationship between the primary dendritic arm spacings and the growth rates was in good agreement with Trivedi model during dendritic growth. Besides, X-ray diffraction and transmission electron microscopy analyses showed that the growth direction of directionally solidified Mg-4 wt% Zn alloy was （1120） lay in {0002} crystal plane, and the preferred orientation was explained with the lattice vibration model for one-dimensional monatomic chain. 展开更多
关键词 Directional solidification Mg-Zn alloy Microstructure evolution Primary dendritic arm spacing Growth orientation
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Unveiling the orientation growth mechanism and solar-blind response performance of β-Ga2O3(100)film on SiC substrate with AlN buffer layer 认领 引用
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作者 Jie Su Zixin Zhang +5 位作者 Liang Shi Liping Feng Fuchao He Jingjing Chang Jincheng Zhang Yue Hao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第7期20-28,共9页
Optimizing the orientation of β-Ga2O3 has emerged as an effective strategy to design high-performance β-Ga2O3 device,but the orientation growth mechanism and approach have not been revealed yet.Herein,by... Optimizing the orientation of β-Ga2O3 has emerged as an effective strategy to design high-performance β-Ga2O3 device,but the orientation growth mechanism and approach have not been revealed yet.Herein,by employing AlN buffer layer,the highly preferred orientation of β-Ga2O3(100)film rather than(-201)film is realized on 4H-SiC substrate at low sputtering power and temperature.Because β-Ga2O3(100)film exhibits a slower growth speed than(-201)film,the former possesses the higher dangling bond density and the lower nucleation energy,and a large conversion barrier exists between these two ori-entations.Moreover,the AlN buffer layer can suppress the surface oxidation of the 4H-SiC substrate and eliminate the strain of β-Ga2O3(100)film,which further reduces the nucleation energy and en-larges the conversion barrier.Meanwhile,the AlN buffer layer can increase the oxygen vacancy formation energy and decrease the oxygen vacancy concentration of β-Ga2O3(100)film.Consequently,the solar-blind photodetector based on the oriented film exhibits the outstanding detectivity of 1.22×1012 Jones and photo-to-dark current ratio of 1.11×105,which are the highest among the reported β-Ga2O3 solar-blind photodetector on the SiC substrate.Our results offer in-depth insights into the preferred orientation growth mechanism,and provide an effective way to design high-quality β-Ga2O3(100)orientation film and high-performance solar-blind photodetector. 展开更多
关键词 β-Ga2O3(100)film Orientation growth AlN buffer layer Solar-blind photodetector DFT calculation
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Diamine-Mediated Synergistic Engineering of Orientation and Interfacial Field of 3D/1D Heterojunctions for Efficient Perovskite Photovoltaics 认领 引用
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作者 Yaobin Li Yunxuan Cao +14 位作者 Yu Zou Wenjin Yu Zhenhuang Su Zhuoer Cai Yueli Liu Qinyun Liu Hantao Wang Lefan Gong Yucheng Ye Rong Tang Yunan Gao Felix Thomas Eickemeyer Bo Qu Lixin Xiao Zhijian Chen 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第9期1021-1034,共14页
The performance of three-dimensional(3D)perovskite solar cells(PSCs)is predominantly limited by interfacial non-radiative recombination and instability.Although low-dimensional(LD)interlayers,particularly two-dimensio... The performance of three-dimensional(3D)perovskite solar cells(PSCs)is predominantly limited by interfacial non-radiative recombination and instability.Although low-dimensional(LD)interlayers,particularly two-dimensional(2D)perovskites,are widely adopted for surface passivation,their heterogeneous n-values and quantum-well confinement often impede charge transport.One-dimensional(1D)perovskites offer a promising alternative due to their structural flexibility and superior passivation capabilities,yet their potential has been underexploited by challenges in controlled crystallization and ordered orientation.Here,we constructed a 3D/PDAI2/1D heterojunction through sequential deposition of propane-1,3-diammonium iodide(PDAI2)and 4-amidinopyridinium chloride(4APyCl).The pre-anchored PDAI2 not only provides field-effect passivation but also templates the subsequent vertical alignment of 1D Pb–I chains assembled with 4APyCl.This configuration establishes continuous out-of-plane charge transport channels,enabling effective surface defect passivation,favorable energy-level alignment,and enhanced interfacial carrier extraction.The resulting inverted PSCs achieved a champion power conversion efficiency of 25.8%and retained 85%of the initial performance after 1000 h of maximum power point tracking under 1-sun illumination.By demonstrating the critical role of molecular orchestration in LD interlayers,this work provides a blueprint for establishing structure–property relationships and guides the rational design of stable and efficient 3D/1D perovskite photovoltaics. 展开更多
关键词 Perovskite Solar cell 3D/1D heterojunction Oriented growth Field effect passivation
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Growth orientation and superconducting properties of YBa_2Cu_3O7-δ films prepared by the low-fluorine sol-gel process 认领 引用
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作者 雷黎 赵高扬 +1 位作者 徐慧 赵娟娟 《Journal of Semiconductors》 EI CAS 北大核心 2010年第8期35-41,共7页
YBa_2Cu_3O_（7-δ）（YBCO） films were deposited on（100）-oriented LaAlO_3（LAO） single crystal substrates by the dip-coating process using low-fluorine solution.Their microstructures were characterized with the aid... YBa_2Cu_3O_（7-δ）（YBCO） films were deposited on（100）-oriented LaAlO_3（LAO） single crystal substrates by the dip-coating process using low-fluorine solution.Their microstructures were characterized with the aid of X-ray diffractometry,scanning electron microscopy and high-resolution transmission electron microscopy.Their superconducting properties were measured by the standard four-probe method.The experiment results show that the film obtained under high enough humidity conditions exhibits better c-axis texture and superconducting properties than the film under a relatively low humidity conditions.Based on the classical nucleation and chemical reaction thermodynamics theory, the underlying crystalline and growth mechanisms of YBCO films under certain humidity conditions are explained in combination with our experimental results.It is suggested that the unreacted intermediate phases such as BaF_2 and CuO aggregated in the YBCO grain boundary will cause lattice distortion in the YBCO matrix and further induce the formation of a-axis oriented YBCO grains as crystallization proceeds.Therefore,it is believed that the relative content of water vapor within the heat-treatment atmosphere plays quite an important role in the preparation of c-axis oriented YBCO film with good superconducting properties. 展开更多
关键词 YBCO films low-fluorine process growth orientation sol-gel
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Orientational growth behavior and mechanism of delta(δ)phase precipitation in cold-rolled Inconel 718 alloy during heat treatment 认领 引用 被引量：1
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作者 Neng-yong Ye Guang-liang Zhang +3 位作者 Tian-yue Huang Ming Cheng Shi-hong Zhang Lei Wang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2024年第1期264-274,共11页
Due to the important role ofδphase's quantity and morphology in the mechanical and fatigue properties of Inconel 718 alloy and its components,it is necessary to renew insights into the effect of cold deformation ... Due to the important role ofδphase's quantity and morphology in the mechanical and fatigue properties of Inconel 718 alloy and its components,it is necessary to renew insights into the effect of cold deformation on theδphase precipitation,especially on the morphology evolution.Therefore,the nucleation and growth behavior ofδphase in cold-rolled Inconel 718 alloy during aging were investigated.The results show that the precipitation rate and volume fraction ofδphase increase with increasing the cold rolling reduction from 10%to 50%.The volume fraction ofδphase reaches equilibrium after 5 h,remaining at 5.98%,6.52%,and 6.79%under different rolling reductions(10%,30%,and 50%),respectively.The nucleation ofδphase mainly occurs on different sites(grain boundaries,new twin boundaries and old twin boundaries)under 10%rolling reduction,whileδphase mainly nucleates on the new grain boundaries of static recrystallization due to 50%rolling reduction.And the growth ofδphase undergoes a process of alternate orientation growth from spherical(nucleation)→short rod(longitudinal orientation growth)→short rod(radial orientation growth)→dynamic equilib-rium.Under 10%rolling reduction,δphase tends to grow into the matrix,while under 50%rolling reduction,the orientation grows faster and is easily affected by the grain boundary curvature. 展开更多
关键词 Inconel 718 alloy Cold rolling δphase Orientation growth Morphology evolution
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Caffeine-enhanced Zn(0 0 2)texture-oriented growth for stable aqueous zinc-ion batteries 认领 引用 被引量：1
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作者 Zhihong Luo Tingting Xu +8 位作者 Liucheng Cao Qi Liu Degui Li Xiangqun Zhuge Laijun Liu Yibing Li Kun Luo Kai Qi Bao Yu Xia 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第8期44-52,共9页
Inhibiting dendrites formation and side-reactions is a critical challenge for practical application of aqueous Zn-ion batteries(AZIBs).Electrolyte additives offer an effective solution to address this problem.Inspired... Inhibiting dendrites formation and side-reactions is a critical challenge for practical application of aqueous Zn-ion batteries(AZIBs).Electrolyte additives offer an effective solution to address this problem.Inspired by using green corrosion inhibitor for metals,we introduce caffeine,extracted from tea-leaf,as an additive to achieve stable AZIBs.Caffeine,with its N and O containing groups,strongly adsorbs on the Zn anode and Zn2+ions.This featured adsorption induces the replacement of water molecules from electric double layer(EDL)and solvation shell,suppressing side-reactions such as corrosion and hydrogen evolution reaction(HER).Moreover,the selective adsorption and steric hindrance of caffeine promote Zn(002)-oriented deposition,resulting in uniform and compact zinc deposits at both low and high current density and areal capacity.Due to the significantly suppressed dendrites and corrosion,the Coulomb Efficiency(CE)reaches 99.24%after 800 cycles,and the Zn||MnO2battery shows a specific capacity of 167.2 mAh g−1with 81%capacity retention after 1000 cycles at 2 A g−1. 展开更多
关键词 Zn-ion battery Zn dendrites Caffeine Adsorption Oriented growth
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Elemental migration motivating efficient carrier transportation in Sb2Se3solar cells with spin-coated CdS film 认领 引用
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作者 Weihuang Wang Weiyu Wang +8 位作者 Junjie Lin Zixian Cai Nuoyan Sun Ye Huang Qiqiang Zhu Qiao Zheng Jionghua Wu Hui Deng Shuying Cheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期110-120,I0004,共11页
Sb2Se3 has been developing as one of the most excellent new emerging candidates for photovoltaic devices.However,the knock-on negative effect induced by the unideal quality of the CdS contacting layer largely re... Sb2Se3 has been developing as one of the most excellent new emerging candidates for photovoltaic devices.However,the knock-on negative effect induced by the unideal quality of the CdS contacting layer largely restricts the power conversion efficiency(PCE) of Sb2Se3 thin film solar cells,especially for the vacuum-processed ones.Herein,to improve the carrier transportation of the CdS Sb2Se3 interface and the PCE of Sb2Se3 solar cells,distinguished from the traditional chemical bath deposition(CBD) method,a spin-coated CdS film was adopted as the contacting layer for the Sb2Se3 thin film.The results revealed that the spin-coated CdS film possesses better crystallinity and conductivity than CBD-CdS films,which not only can induce better [hk1] orientated Sb2Se3 film but also contribute to the spike-like bandgap alignment of CdS/Sb2Se3 interface.Therefore,the defect level and concentration in Sb2Se3 solar cells were greatly reduced.Interestingly,the elemental migration during the post-annealing process can further optimize the heterojunction quality,the crystallinity,and vertical growth of Sb2Se3 films and covert Vse1 defects into Sbse3 defects with lower concentration,leading to the widened depletion region,decreased defect concentration,enhanced carrier lifetime,and built-in voltage for the Sb2Se3 device.The vapor transport deposition(VTD)-processed Sb2Se3 solar cells achieved a remarkable enhancement of 63.5% in PCE compared to devices based on CBD-derived CdS films,reaching a champion PCE of8.65% with a Voc of 0.42 V,Jsc of 32.33 mA/cm2,and FF of 63.68%-the highest reported PCE for Sb2Se3solar cells based on spin-coated CdS films to date.The results shed new light on solution-processed CdS films for fabricating high-efficiency Sb2Se3 solar cells,and highlighted the critical role of selfpassivation induced by elemental migration during the post-annealing process. 展开更多
关键词 Sb2Se3 CdS Spin‑coating Band alignment Growth orientation
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Modeling of equiaxed and columnar dendritic growth of magnesium alloy 认领 引用 被引量：11
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作者 吴孟武 熊守美 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第9期2212-2219,共8页
Based on the cellular automaton （CA） method, a numerical model was developed to simulate the dendritic growth of magnesium alloy with HCP crystal structure. The growth kinetics was calculated from the complete solut... Based on the cellular automaton （CA） method, a numerical model was developed to simulate the dendritic growth of magnesium alloy with HCP crystal structure. The growth kinetics was calculated from the complete solution of the transport equations. By defining a special neighborhood configuration with the square CA cell, and using a set of capturing rules which were proposed by BELTRAN-SANCHEZ and STEFANESCU for the dendritic growth of cubic crystal metals during solidification, modeling of dendritic growth of magnesium alloy with different growth orientations was achieved. Simulation of equiaxed dendritic growth and columnar dendritic growth under directional solidification was carried out, and validation was performed by comparing the simulated results with the experimental results and those in the previously published works. 展开更多
关键词 magnesium alloy dendritic growth cellular automaton method growth orientation
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Study on Characteristics of Crystal Growth of NdFeB Cast Alloys 认领 引用
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作者 李波 郭炳麟 +2 位作者 王东玲 刘涛 喻晓军 《Journal of Rare Earths》 SCIE EI CAS 2004年第2期220-222,共3页
The characteristic of crystal growth of NdFeB cast alloys was studied. It is found that the crystal growth orientation of conventional ingots is along or . As the cooling rate increases, the crystallization orientatio... The characteristic of crystal growth of NdFeB cast alloys was studied. It is found that the crystal growth orientation of conventional ingots is along or . As the cooling rate increases, the crystallization orientation changes from a axis to c axis, along which the grain is easy to be magnetized. Meanwhile, by analyzing the change of crystallization orientation, the influence on the property of magnets was discussed. 展开更多
关键词 metal materials NdFeB cast alloys strip casting cooling rate crystal growth orientation rare earths
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Exposing Zn(002)Texture with Sucralose Additive for Stable and Dendrite-Free Aqueous Zinc-Ion Batteries 认领 引用 被引量：1
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作者 Feiyu Tao Yingke Ren +9 位作者 Li’e Mo Yifan Wang Yang Huang Hong Zhang Chengwu Shi Zhaoqian Li Jiaqin Liu Lei Chen Linhua Hu Yucheng Wu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第4期40-53,共14页
Aqueous zinc-ion batteries(AZIBs)are currently confronted with the challenge of achieving long-term cyclic stability under high current densities.This issue is primarily attributed to the excessive growth of dendrites... Aqueous zinc-ion batteries(AZIBs)are currently confronted with the challenge of achieving long-term cyclic stability under high current densities.This issue is primarily attributed to the excessive growth of dendrites and the occurrence of significant side reactions.Herein,sucralose(SCL),as an electrolyte additive,has been used to promote the exposure of the Zn(002)texture.The introduction of SCL can adjust the Zn~(2+)nucleation and diffusion along different crystal facets,promoting the exposure of the Zn(002)texture.By substituting water molecules in the[Zn(H2O)6]~(2+),SCL reconfigures the hydrogen bond network in the electrolyte,reconstructing the solvation structure and suppressing the hydrogen evolution reaction.Consequently,the Zn//Zn symmetric battery exhibits long-term cycling stability of over 4900 h at 1 mA cm-2-1 mAh cm-2.Even at a harsh condition of 30 mA cm-2-30 mAh cm-2(DOD=73.3%),it can stably cycle for 171 h.The CE of the Zn//Cu half battery reaches 99.61% at 0.2 mA cm-2with 0.2 mAh cm-2.Employing the optimized electrolyte,after 500 cycles,a high specific capacity of 420 mAh g-1can be retained for the NH_4V_4O10//Zn full battery at 500 mA g-1,corresponding to a capacity retention of 90.7%. 展开更多
关键词 Aqueous zinc-ion batteries Zinc anode Oriented growth (002)texture
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Oriented Growth of PZT thick film embedded with PZT nanoparticles 认领 引用 被引量：4
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作者 段中夏 袁杰 +2 位作者 赵全亮 路冉 曹茂盛 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2009年第2期232-236,共5页
This paper reports that dense and crack-free （100） oriented lead zirconate titanate （Pb（ Zr0. 52Ti0. 48 ）O3, PZT） thick film embedded with PZT nanopartieles has been successfully fabricated on Pt/Cr/SiO2/Si subs... This paper reports that dense and crack-free （100） oriented lead zirconate titanate （Pb（ Zr0. 52Ti0. 48 ）O3, PZT） thick film embedded with PZT nanopartieles has been successfully fabricated on Pt/Cr/SiO2/Si substrate by using PT transition layer and PVP additive. The thick film possesses single-phase perovskite structure and perfectly （100） oriented. The （100） orientation degree of the PZT films strongly depended on annealing time and for the 4μm-thick PZT film which was annealed at 700℃ for 5 min is the largest. The （100） orientation degree of the PZT thick film gradually strengthen along with the thickness of film decreasing. The 3μm-thick PZT thick film which was annealed at 700℃ for 5 rain has the strongest （100） orientation degree, which is 82. 3%. 展开更多
关键词 PZT sol-gel thick film oriented growth
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Relationship between solid/liquid interface and crystal orientation for pure magnesium solidified in fashion of cellular crystal 认领 引用 被引量：3
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作者 常国威 陈淑英 +2 位作者 周聪 岳旭东 齐义辉 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS 2010年第2期289-293,共5页
The relationship between the solid/liquid interface and the crystal orientation for pure magnesium,which grows in fashion of cellular crystal in unidirectional solidification,was investigated.The results show that the... The relationship between the solid/liquid interface and the crystal orientation for pure magnesium,which grows in fashion of cellular crystal in unidirectional solidification,was investigated.The results show that the energy of the solid/liquid interface is the lowest during cellular crystal growth of pure magnesium;and the solid/liquid interface is covered by the basal face{0001}and by the crystal face made up of three atoms located at the orientation{0001}0100and two atoms located at the inner of magnesium crystal cell.The strongest bond is formed in the direction of 61.9°viating from the growth direction,and the second strong bond is formed in the directions of 8.5°d 47.7°espectively,deviating from the growth direction.The angle between the basal face{0001} and the growth direction is 61.9°he theoretical analysis results are basically consistent with the experimental results from SUSUMU et al. 展开更多
关键词 magnesium solidification process crystal growth crystal orientation
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Ultrahigh flux of graphene oxide membrane modified with orientated growth of MOFs for rejection of dves and oil-water separation 认领 引用 被引量：1
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作者 Meng Zhu Yucheng Liu +7 位作者 Mingyan Chen Dong Gan Maoren Wang Haojie Zeng Maoqi Liao Jie Chen Wenwen Tu Wen Niu 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第10期2683-2688,共6页
Metal organic frameworks(MOFs)has broad application prospect in separation,catalysis,and adsorption.By a facile green method,we successfully fabricated prGO@cHKUST-1 composite membrane with the modification of dopamin... Metal organic frameworks(MOFs)has broad application prospect in separation,catalysis,and adsorption.By a facile green method,we successfully fabricated prGO@cHKUST-1 composite membrane with the modification of dopamine and orientated growth of MOFs.Mg/AI-layered double hydroxides(Mg/Al-LDHs)was used as a modulator to obtain cubic HKUST-1(cHKUST-1)with excellent morphology and special properties.Scanning Electron Microscopy(SEM),X-ray diffraction(XRD),and Fourier transform infrared spectroscopy(FTIR)etc.characte rization illustrated successful synthesis of cHKUST-1 and composite membranes.Cubic HKUST-1 can tune the inter-layer spacing of graphene oxide(GO)leading increase in hydrophilicity and flux of the membrane.Meanwhile,the reduction effect of PDA and intercalation effect of MOFs could change the stacked way of GO layers,forming several fuzzy pores and more active sites on membrane surface.The prGO@cHKUST-1 membrane has an excellent rejection for methylene blue(MB)(99.5%)and Congo red(CR)(71.2%).Moreover,the modified membra ne exhibited 10 and 5 times higher permeation flux than that of original GO membrane and prGO membrane,respectively.Thus,using orientated growth of MOFs to synthesize GO based composite membrane will provide useful insights in ultrahigh permeation flux membranes of dye and oil-water emulsion separation. 展开更多
关键词 GO composite membrane Metal organic frameworks Mg/Al-LDHs Orientated growth Ultra-high flux
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Tensile deformation characteristics and high-plasticity mechanism of directionally solidified pure magnesium 认领 引用
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作者 ZHANG Hang FANG Da-ran +4 位作者 ZHAO Sheng-shi LIN Xiao-ping LIAN Yong-qiang ZHANG Xu-zhao GAO Qiu-zhi 《Journal of Central South University》 SCIE EI CAS CSCD 2025年第5期1602-1613,共12页
The pure Mg with columnar crystals was prepared by directional solidification,and the effect of process parameters on the crystal orientation and tensile properties was studied.Moreover,the microstructure evolution du... The pure Mg with columnar crystals was prepared by directional solidification,and the effect of process parameters on the crystal orientation and tensile properties was studied.Moreover,the microstructure evolution during tensile deformation was analyzed by electron backscatter diffraction(EBSD)technology.Furthermore,the slip within adjacent grains and grain boundary strain were discussed using the bicrystal model theory.The results show that the microstructure of the pure Mg at a pulling rate of 200μm/s is columnar polycrystal with growth orientation concentrated in,and no transverse grain boundaries can be seen.In addition,the Schmid factors(SFs)of basalslips in columnar crystals are higher than 0.43 under tensile stress.Moreover,the geometric compatibility factor of slip systems on both sides of grain boundaries is greater than 0.7,showing good strain coordination ability of grain boundaries.Therefore,the elongation of the directionally solidified pure Mg is as high as 53%at room temperature. 展开更多
关键词 magnesium columnar crystal growth orientation geometric compatibility factor elongation
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Investigation of the effect of growth ring orientation on the shear properties of sawn timber 认领 引用
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作者 Zilu Zheng Yifei Zhao +2 位作者 Guijuan Hu Rui Wang Zhi Li 《Low-carbon Materials and Green Construction》 2025年第1期171-182,共12页
This study investigates the influence of growth ring orientation on the shear behavior of engineered timber,with the objectiveof improving the structural performance and optimizing the design of cross-laminated timber... This study investigates the influence of growth ring orientation on the shear behavior of engineered timber,with the objectiveof improving the structural performance and optimizing the design of cross-laminated timber.Four groups of sprucepine-fir samples with different growth ring orientations were selected for analysis:6° (Group H),37° (Group I),85° (Group J),and with the pith at the center of the sample (Group K).V-notch shear tests (Iosipescu shear tests) were carried out by ASTMD5379/D5379M-19.The test results showed significant differences in shear performance among specimens with differentgrowth ring orientations.In particular,Group I and Group K exhibited the higher shear performance,with average shearstrengths of 3.89 MPa and 4.25 MPa,and shear moduli of 376.92 MPa and 270.38 MPa,respectively.In contrast,Group Jshowed the lowest shear performance,with an average shear strength of 2.13 MPa and a shear modulus of 56.85 MPa.The shear properties of Group H were intermediate between those of Group I and Group J,with an average shear strengthof 3.00 MPa and a shear modulus of 149.53 MPa.Analysis of the load–displacement curves and stress–strain curves indicatedthat Group I and Group K had higher yield strength and stiffness before failure,while Group J exhibited better ductility. 展开更多
关键词 Growth ring orientation Iosipescu shear test Shear strength Shear modulus
Germinant ZnO nanorods as a charge-selective layer in organic solar cells 认领 引用 被引量：1
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作者 Kunsik An Jaehoon Kim +5 位作者 Mohammad Afsar Uddin Seunghyun Rhee Hyeok Kim Kyung-Tae Kang Han Young Woo Changhee Lee 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第20期89-94,共6页
A facile method was introduced and demonstrated to synthesize zinc oxide(ZnO) nanorods(NRs) as an electron transporting layer(ETL) for organic solar cells(OSCs).Hydrothermal synthesis of the NRs showed a constant grow... A facile method was introduced and demonstrated to synthesize zinc oxide(ZnO) nanorods(NRs) as an electron transporting layer(ETL) for organic solar cells(OSCs).Hydrothermal synthesis of the NRs showed a constant growth rate of 5.5 nm min-1 from germination to sub-micrometer length.The properties were characterized using scanning electron microscopy(SEM),transmission electron microscopy(TEM),absorption spectrophotometry and so on.Based on these measurements,the germinant growth mechanism and its corresponding orientation characteristics were investigated.As an ETL of the OSCs,ZnO NRs enhance the charge extraction from the active layer due to their increased interfacial surface area,but there is an optimal length because of the shunt path formation and UV absorption of long ZnO NRs.As a re sult,the OSC with the ZnO NRs as ETL shows power conversion efficiency(PCE) up to 6.2%.The J-V characteristics and incident photon-to-current conversion efficiency(IPCE) measurement also reveal that the efficiency enhancement is an assembly of individual results from optical,physical and electrical characteristic of the ZnO NRs. 展开更多
关键词 ZnO nanorods Solar cells Self-assembly Oriented growth mechanism Hydrothermal synthesis
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Interaction of straight chain alcohol vapors with self-assembled MOF film by surface plasmon resonance sensing and imaging 认领 引用 被引量：1
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作者 Jun Chen Ji-Ying Xu Yi Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2013年第7期651-653,共3页
Interaction of straight chain alcohol vapors with MOF-199-functionalized films was studied by SPR. The signals had linear relationships with the concentration of alcohols over a wide range from 0 to 70% （v/v） and we... Interaction of straight chain alcohol vapors with MOF-199-functionalized films was studied by SPR. The signals had linear relationships with the concentration of alcohols over a wide range from 0 to 70% （v/v） and were reversible in proportional to the chain length, with R2 all above 0.99. 展开更多
关键词 Layer by layer self-assemble of MOF Oriented growth Alcohol vapors detection Surface plasmon resonance or SPR
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Grain oriented growth and properties of ultra-high temperature CaBi_2Nb_2O_9 piezoelectric ceramics 认领 引用 被引量：2
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作者 TIAN XiaoXia QU ShaoBo +2 位作者 WANG BinKe ZHANG WuSen ZHAO JianFeng 《Science China Chemistry》 SCIE EI CAS 2011年第10期1552-1557,共6页
CaBi2Nb2O9(CBNO)ceramics was prepared at 1050℃using regular flake-like CBNO powders as the precursor,and synthe-sized by the molten salts synthesis method.The tropism degree and microstructure of the ceramics were an... CaBi2Nb2O9(CBNO)ceramics was prepared at 1050℃using regular flake-like CBNO powders as the precursor,and synthe-sized by the molten salts synthesis method.The tropism degree and microstructure of the ceramics were analyzed,and the die-lectric,ferroelectric and piezoelectric properties were characterized.Compared with conventional methods,the properties of CBNO ceramics by the new preparation method were found to be better.As the sinter temperature decreases,the grain growth becomes regular with textured features.The polarization process becomes easy to be realized at room temperature.Moreover,the dielectric loss decreases and the piezoelectric constant increases significantly. 展开更多
关键词 CaBi2Nb2O9 ultra-high temperature grain oriented growth performance
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Fabrication and Magnetic Properties of Highly Oriented ZnO:Eu Films by Sol-Gel Process 认领 引用 被引量：2
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作者 车平 孟健 +1 位作者 任丽荣 郭林 《Journal of Rare Earths》 SCIE EI CAS 2006年第Z2期298-301,共4页
A series of Eu-doped ZnO films were prepared by a sol-gel method. Precursor and films were characterized by thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscope (SEM), UV-vis spectra, as we... A series of Eu-doped ZnO films were prepared by a sol-gel method. Precursor and films were characterized by thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscope (SEM), UV-vis spectra, as well as the magnetism measurement. The wurtzite structure of obtained films presents an extreme high c-orientation character. The film susceptibility resembles a Curie-Weiss behavior at high temperature, and presents an obvious enhancement at low temperature, indicating the presence of antiferromagnetic interactions in the Zn0.9Eu0.1O films. 展开更多
关键词 zinc oxide film europium ion oriented growth magnetic property rare earths
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Growth of ZnO self-converted 2D nanosheet zeolitic imidazolate framework membranes by an ammoniaassisted strategy 认领 引用 被引量：6
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作者 Yujia Li Lu Lin +5 位作者 Min Tu Pei Nian Ashlee J. Howarth Omar K. Farha Jieshan Qiu Xiongfu Zhang 《Nano Research》 SCIE EI CSCD 2018年第4期1850-1860,共11页
Shaping crystalline porous materials such as metal organic frameworks （MOFs） and zeolites into two-dimensional （2D） nanosheet forms is highly desirable for developing high-performance molecular sieving membranes. ... Shaping crystalline porous materials such as metal organic frameworks （MOFs） and zeolites into two-dimensional （2D） nanosheet forms is highly desirable for developing high-performance molecular sieving membranes. However, conventional exfoliation-deposition is complex and challenging for the large-scale fabrication of nanosheet MOF tubular membranes. Here, for the first time, we report a direct growth technique by ZnO self-conversion and ammonia assistance to fabricate zeolitic imidazolate framework （ZIF） membranes consisting of 2D nanosheets on porous hollow fiber substrates; the membranes are suitable for large-scale industrial gas separation processes. The proposed fabrication process for ZIF nanosheet membranes is based on the localized self-conversion of a pre-deposited thin layer of ZnO in a ligand solution containing ammonium hydroxide as a modulator. The resulting ZIF 2D nanosheet tubular membrane is highly oriented and only 50 nm in thickness. It exhibits excellent molecular sieving performance, with high H2 permeance and selectivity for H2/CO2 separation. This technique shows great promise in MOF nanosheet membrane fabrication for large-scale molecular sieving applications. 展开更多
关键词 nanosheet nanosheet membrane metal organic framework membrane oriented growth gas separation
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