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| 1 | Low-Dimensional Halide Perovskites and Their Advanced Optoelectronic Applications显示文摘Metal halide perovskites are crystalline materials originally developed out of scientific curiosity. They have shown great potential as active materials in optoelectronic applications. In the last 6 years, their certified photovoltaic efficiencies have reached 22.1%. Compared to bulk halide perovskites, low-dimensional ones exhibited novel physical properties. The photoluminescence quantum yields of perovskite quantum dots are close to 100%. The external quantum efficiencies and current efficiencies of perovskite quantum dot light-emitting diodes have reached 8% and 43 cd A^(-1),respectively, and their nanowire lasers show ultralow-threshold room-temperature lasing with emission tunability and ease of synthesis. Perovskite nanowire photodetectors reached a responsivity of 10 A W^(-1)and a specific normalized detectivity of the order of 10^(12 )Jones. Different from most reported reviews focusing on photovoltaic applications, we summarize the rapid progress in the study of low-dimensional perovskite materials, as well as their promising applications in optoelectronic devices. In particular, we review the wide tunability of fabrication methods and the state-of-the-art research outputs of low-dimensional perovskite optoelectronic devices. Finally, the anticipated challenges and potential for this exciting research are proposed. | Jian Zhang Xiaokun Yang Hui Deng Keke Qiao Umar Farooq Muhammad Ishaq Fei Yi Huan Liu Jiang Tang Haisheng Song | 2017 | Nano-Micro Letters2017，9，3： | 10 |
| 2 | Cenozoic Evolution of Sediments and Climate Change and Response to Tectonic Uplift of the Northeastern Tibetan Plateau显示文摘Through a comprehensive study of magnetostratigraphy and sedimentology of several basins in the northeastern Tibetan Plateau, we reveal that the study area mainly experienced six tectonic uplift stages at approximately 52 Ma, 34–30 Ma, 24–20 Ma, 16–12 Ma, 8–6 Ma, and 3.6–2.6 Ma. Comprehensive analyses of pollen assemblages from the Qaidam, Linxia, Xining, and West Jiuquan Basins show that the northeastern Tibetan Plateau has undergone six major changes in vegetation types and climate: 50–40 Ma for the warm-humid forest vegetation, 40–23 Ma for the warm-arid and temperate-arid forest steppe vegetation, 23–18.6 Ma for the warm-humid and temperatehumid forest vegetation, 18.6–8.5 Ma for the warm-humid and cool-humid forest steppe vegetation, 8.6–5 Ma for the temperate sub-humid savanna steppe vegetation, and 5–1.8 Ma for the cold-arid steppe vegetation. Comprehensive comparisons of tectonic uplift events inferred from sedimentary records, climatic changes inferred from pollen, and global climate changes show that in the northeastern Tibetan Plateau the climate in the Paleogene at low altitude was mainly controlled by the global climate change, while that in the Neogene interval with high altitude landscapes of mountains and basins is more controlled by altitude and morphology. | LIANG Xia JI Junliang LU Jingfang KE Xue AI Keke XU Yadong SONG Bowen | 2014 | Acta Geologica Sinica(English Edition)2014，88，3： | 5 |
| 3 | Occurrence of Middle Miocene Fossil Cyprinid Fish in the Northern Qaidam Basin and its Paleoenvironmental Implications显示文摘With a thick sequence of early Eocene to Pleistocene terrestrial records, the Qaidam Basin on the northern Tibetan Plateau provides an important sedimentary archive for understanding the paleoenvironmental evolution of the northeast Tibetan Plateau. In this study, specimens of fossil fish remains are collected from the late Middle Miocene(Serravallian, ~12 Ma) of the middle member of the Shang Youshashan Formation, Dahonggou(DHG) section, in the northern Qaidam Basin. Based on a systematic study of these materials, the remains have assigned to Cyprinidae, with typical pharyngeal teeth and dorsal fin spines with serrations on the posterior edge. Our discovery improves understanding of the cyprinid fish distribution characteristics in the Qaidam Basin during the Cenozoic. Cooccurrences of terrestrial brackish ostracod species Cyprideis and long chain alkenonesin the layer indicate that the studied cyprinid fish lived in a generally large brackish to saline water body during the late middle Miocene(Serravallian), when the climate of Qaidam Basin was still not sufficiently dry to form an extreme saline water lake. | SONG Bowen ZHANG Kexin JI Junliang HAN Fang WANG Chaowen WANG Jiaxuan AI Keke | 2017 | Acta Geologica Sinica(English Edition)2017，91，5： | 3 |
| 4 | Working-in-tandem mechanism of multi-dopants in enhancing electrocatalytic nitrogen reduction reaction performance of carbon- based materials显示文摘Developing carbon-based electrocatalysts with excellent N2 adsorption and activation capability holds the key to achieve highly efficient nitrogen reduction reaction(NRR)for reaching its practical application.Here,we report a highly active electrocatalyst--metal-free pyrrolic-N dominated N,S co-doped carbon(pyrr-NSC)for NRR.Based on theoretical and experimental results,it is confirmed that the N and S-dopants practice a working-in-tandem mechanism on pyrr-NSC,where the N-dopants are utilized to create electropositive C sites for enhancing N2 adsorption and the S-dopants are employed to induce electron backdonation for facilitating N2 activation.The synergistic effect of the pyrrolic-N and S-dopants can also suppress the irritating hydrogen evolution reaction,further boosting the NRR performance.This work gives an indication that the combination of two different dopants on electrocatalyst can enhance NRR performance by working in the two tandem steps-the adsorption and activation of N2 molecules,providing a new strategy for NRR electrocatalyst design. | Wenqing Zhang Keke Mao Jingxiang Low Hengjie Liu Yanan Bo Jun Ma Qiaoxi Liu Yawen Jiang Jiuzhong Yang Yang Pan Zeming Qi Ran Long Li Song Yujie Xiong | 2021 | Nano Research2021，14，9： | 2 |
| 5 | Design of platinum single-atom doped metal nanoclusters as efficient oxygen reduction electrocatalysts by coupling electronic descriptor显示文摘Inspired by the single-atom catalysts(SACs)concept,we rationally design a series of Pt single atom catalysts embedded in different transition metal nanoclusters through first-principles calculations.In these so-called“crown-jewel”(CJ)structures,Pt atoms(jewels)occupy the vertex sites of the metal nanocluster(crown)surface.We investigated the thermal stability and oxygen reduction reaction(ORR)catalytic activity of these catalysts.The results reveal that CJ-structured PtCu nanoclusters are stable and possess a comparable or even better ORR activity compared to Pt catalyst,making it a promising candidate for low-cost ORR catalysts.The effect of cluster size on the adsorption strength of ORR intermediates and catalytic property has also been studied.Furthermore,the overall ORR catalytic activity trend of these SACs is explained based on analysis of their electronic properties.A descriptorΨwas established to provide further insight into the correlation between the electronic structure and catalytic activity,which provides a design strategy for new ORR catalysts.More importantly,we reveal that this electronic descriptor can be extended to predict other CJ-structured nanoclusters. | Qing Liu Xiaoxu Wang Lu Li Keke Song Ping Qian Yuan Ping Feng | 2022 | Nano Research2022，15，8： | 1 |
| 6 | Phosphate-induced interfacial electronic engineering in VPO_(4)-Ni_(2)P heterostructure for improved electrochemical water oxidation显示文摘Anodic oxygen evolution reaction(OER)is the key bottleneck for water electrolysis technique owing to its sluggish reaction kinetics.Interfacial engineering on the rationally designed heterostructure can regulate the electronic states efficiently for intrinsic activity improvement.Here,we report a co-phosphorization approach to construct a VPO_(4)-Ni_(2)P heterostructure on nickel foam with strongly chemical binding,wherein phosphate acts as electronic modifier for Ni_(2)P electrocatalyst.Profiting from the interfacial interaction,it is uncovered that electron shifts from Ni_(2)P to VPO_(4)to render valence increment in Ni species.Such an electronic manipulation rationalizes the chemical affinities of various oxygen intermediates in OER pathway,giving a substantially reduced energy barrier.As a result,the advanced VPO_(4)-Ni_(2)P heterostructure only requires an overpotential of 289 mV to deliver a high current density of 350 mA/cm^(2)for OER in alkaline electrolyte,together with a Tafel slope as low as 28 mV/dec.This work brings fresh insights into interfacial engineering for advanced electrocatalyst design. | Kun Chen Keke Mao Yu Bai Delong Duan Shuangming Chen Chengming Wang Ning Zhang Ran Long Xiaojun Wu Li Song Yujie Xiong | 2022 | Chinese Chemical Letters2022，33，1： | 1 |
| 7 | Effective adsorption and separation of lysozyme with PAA-modified Fe3O4@silica core/shell microspheres 显示文摘 | Shao Dandan Xu Keke Song Xiaojie | 2009 | Journal of Colloid and Interface Science2009，336，2： | 1 |
| 8 | Effective adsorption and separation of lysozyme with PAA-modified Fe 3 O 4 @silica core/shell microspheres显示文摘 | Dandan Shao Keke Xu Xiaojie Song Jianhua Hu Wuli Yang Changchun Wang | 2009 | Journal of Colloid And Interface Science2009，，2： | 1 |
| 9 | Partial hydrolysiso soybean oil by phospholipase A1 ( Lecitase Ultra) 显示文摘 | Wang Yong Zhao Mourning Song Keke | 2010 | Food Chemistry2010，121，： | 1 |
| 10 | Separation of diacylglycerols from enzymaficaUy hydrolyzed soybean oil by molecular distillation显示文摘 | WANG Yong ZHAO Mourning SONG Keke | 2010 | Separation and Purification Technology2010，75，2： | 1 |
| 11 | Separation of diacylglycerols from enzymatically hydrolyzed soybean oil by molecular distillation 显示文摘 | Wang Yong Zhao Mourning Song Keke | 2010 | Separation and Purification Technology2010，75，2： | 1 |
| 12 | Partial hydrolysis of soybean oil by phospholipase Al (Lecitase Ultra)显示文摘 | WANG Yong ZHAO Mourning SONG Keke | 2010 | Food Chemistry2010，121，4： | 1 |
| 13 | Improving the Performance of PbS Quantum Dot Solar Cells by Optimizing ZnO Window Layer显示文摘Comparing with hot researches in absorber layer,window layer has attracted less attention in PbS quantum dot solar cells(QD SCs). Actually, the window layer plays a key role in exciton separation, charge drifting, and so on.Herein, ZnO window layer was systematically investigated for its roles in QD SCs performance. The physical mechanism of improved performance was also explored. It was found that the optimized ZnO films with appropriate thickness and doping concentration can balance the optical and electrical properties, and its energy band align well with the absorber layer for efficient charge extraction. Further characterizations demonstrated that the window layer optimization can help to reduce the surface defects, improve the heterojunction quality, as well as extend the depletion width. Compared with the control devices, the optimized devices have obtained an efficiency of 6.7% with an enhanced V_(oc) of 18%, J_(sc) of 21%, FF of 10%, and power conversion efficiency of 58%. The present work suggests a useful strategy to improve the device performance by optimizing the window layer besides the absorber layer. | Xiaokun Yang Long Hu Hui Deng Keke Qiao Chao Hu Zhiyong Liu Shengjie Yuan Jahangeer Khan Dengbing Li Jiang Tang Haisheng Song Chun Cheng | 2017 | Nano-Micro Letters2017，9，2： | 0 |
| 14 | Influence of composition and size on the thermodynamic stability and structural evolution of CuAlNi nanoclusters显示文摘The heating process for CuAlNi nanoclusters with cuboctahedral structure was studied by molecular dynamics simulation with the embedded atom method.A diffusionless martensitic transformation from the cuboctahedral(CO)to the icosahedral(ICO)structure before the melting point was found in some CuAlNi nanoclusters.The effects of element composition and cluster size on the thermodynamic stability and structural transformation of trimetallic nanoclusters were investigated.The results show that the CO-ICO transformation temperature was size-dependent and occurred only for small clusters.It was also observed that the CO-ICO transformation temperature firstly dropped and then raised as A1 concentration increased,which may be strongly related to the release of excess energy.Furthermore,the surface segregation phenomenon was also observed that the lower surface energy components,such as A1 and Cu atoms,segregated to the surface of CuAlNi nanoclusters.The changes in the melting points of CuAlNi nanoclusters with different alloy compositions and cluster sizes were also studied.And furthermore,the physical basis of structural transition of CuAlNi nanoclusters was discussed. | Qing Liu Ye Su Keke Song Xiaoxu Wang Panpan Gao Chutian Wang Yuqin Xiao Xiaodong Jian Ping Qian | 2020 | Progress in Natural Science:Materials International2020，30，4： | 0 |
| 15 | A Robust Noninvasive Approach to Study Gut Microbiota Structure of Amphibian Tadpoles by Feces显示文摘The 16S rDNA amplicon high-throughput sequencing technique provides a robust and inexpensive approach to detect the gut microbiota of amphibians. Since different experimental protocols generate technical biases in drawing the gut microbiota profiles, the integrative analysis of gut microbiota produced by different studies must be performed with circumspection. In this study, we compared the efficacy of two DNA extraction methods(i.e., a phenol-chloroform method and TIANamp Stool DNA Kit) in describing intestinal and fecal bacterial communities of transplanted Asiatic toad(Bufo gargarizans) tadpoles. In terms of the DNA extraction quality(i.e., DNA purity and yield rate) and the consistency in between fecal and intestinal microbiota structures(i.e., α and β diversity indices), the phenol-chloroform method was more robust than this commercial stool kit in profiling gut microbiota of tadpoles with feces. | Xiaowei SONG Jinghan SONG Honghong SONG Qi ZENG Keke SHI | 2018 | Asian Herpetological Research2018，9，1： | 0 |
| 16 | New nonlinear stiffness actuator with predefined torque‒deflection profile显示文摘A nonlinear stiffness actuator(NSA)could achieve high torque/force resolution in low stiffness range and high bandwidth in high stiffness range,both of which are beneficial for physical interaction between a robot and the environment.Currently,most of NSAs are complex and hardly used for engineering.In this paper,oriented to engineering applications,a new simple NSA was proposed,mainly including leaf springs and especially designed cams,which could perform a predefined relationship between torque and deflection.The new NSA has a compact structure,and it is lightweight,both of which are also beneficial for its practical application.An analytical methodology that maps the predefined relationship between torque and deflection to the profile of the cam was developed.The optimal parameters of the structure were given by analyzing the weight of the NSA and the mechanic characteristic of the leaf spring.Though sliding friction force is inevitable because no rollers were used in the cam-based mechanism,the sliding displacement between the cam and the leaf spring is very small,and consumption of sliding friction force is very low.Simulations of different torque‒deflection profiles were carried out to verify the accuracy and applicability of performing predefined torque‒deflection profiles.Three kinds of prototype experiments,including verification experiment of the predefined torque‒deflection profile,torque tracking experiment,and position tracking experiment under different loads,were conducted.The results prove the accuracy of performing the predefined torque‒deflection profile,the tracking performance,and the interactive performance of the new NSA. | Wenjie JU Hexi GONG Keke QI Rongjie KANG Jian SDAI Zhibin SONG | 2023 | Frontiers of Mechanical Engineering2023，18，1： | 0 |
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