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| 1 | Stress Corrosion Cracking of X80 Steel in the Presence of Sulfate-reducing Bacteria显示文摘The systematic laboratory studies on the roles of sulfate-reducing bacteria(SRB) in the stress corrosion cracking(SCC) susceptibility of X80 steel subjected to cathodic potential have been conducted in a nearneutral pH soil solution by slow strain rate tests.The cathodic potential and SRB increase individually the SCC susceptibility of the steel in the soil solution.The positive role of the SRB activities in SCC susceptibility depends on the prolongation of pre-incubation time,and the SCC susceptibility of the steel increases under more negative potentials.What's more,the applied potentials and the presence of SRB work together in promoting the SCC susceptibility of the steel.But,the combined action becomes limited with decreasing cathodic potentials.The relationships between the plasticity loss and the permeable hydrogen concentration were established for the steel in the soil solution,regardless of under open circuit potential or cathodic potentials,in both the sterile and SRB inoculated conditions.The relationships are practically significant for the selection of safe cathodic protection(CP) potentials in the presence of SRB in soil environment. | Tangqing Wu Maocheng Yan Dechun Zeng Jin Xu Cheng Sun Changkun Yu Wei Ke | 2015 | Journal of Materials Science & Technology2015，31，4： | 11 |
| 2 | Room temperature preparation of highly stable cesium lead halide perovskite nanocrystals by ligand modification for white lightemitting diodes显示文摘The poor stability of halide perovskite nanocrystals(NCs)has severely hindered future practical application.Herein,we proposed a facile and effective ligand modification route to synthesize stable CsPbBr_(3) nanocrystals by introducing a double-terminal ligand,namely 4,4'-Azobis(4-cyanovalericacid)(CA),to replace the conventional oleic acid(OA)ligand at room temperature.The as-synthesized CsPbBr_(3)-CA not only possesses high photoluminescence quantum yield(72%)related to the reduced trap defects,but also shows significantly improved stability exposure to water,ethanol,light,and/or heat benefiting from the CA ligand anchored to NC surfaces tightly.The photoluminescence intensity of CsPbBr_(3)-CA maintains about 80%and 75%of its initial emission intensity after immersed in water or ethanol for 360 min,respectively,whereas that of the CsPbBr_(3)-OA was quenched completely within a few minutes.Moreover,an all-inorganic white light-emitting diode(LED)covered 126%National Television System Committee(NTSC)standard and 92%Rec.2020 standard was fabricated by combining the green CsPbBr_(3)-CA and commercial red-emitting K2SiF6:Mn4+(KSF)phosphors onto a blue LED chip.Thus,the presented work initiates the development of the room temperature preparation of high quality CsPbBr_(3) and shows prospect for next-generation displays. | Yu Zhang Guishun Li Changkun She Shaohua Liu Fangyu Yue Chengbin Jing Ya Cheng Junhao Chu | 2021 | Nano Research2021，14，8： | 3 |
| 3 | The effects of sulfate reducing bacteria on corrosion of carbon steel Q235 under simulated disbonded coating by using electrochemical impedance spectroscopy显示文摘 | Jin Xu Kaixiong Wang Cheng Sun Fuhui Wang Ximing Li Jiaxing Yang Changkun Yu | 2011 | Corrosion Science2011，，4： | 2 |
| 4 | Enhanced electrochemical performance of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3−δ)cathode via Ba-doping for intermediate-temperature solid oxide fuel cells显示文摘La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)(LSCF)is recognized as one of the most promising cathode materials for the highly-desired intermediatetemperature solid oxide fuel cell(IT-SOFC)technology.However,it is still challenged by polarization losses due to reduced operation temperatures.In this work,a series of Ba^(2+)-doped La0.6-xBaxSr0.4Co0.2Fe0.8O3-δ(LBSCFx,x=0.05,0.10,0.15,and 0.20)materials are successfully synthesized and their electrochemical performances are evaluated as a cathode for IT-SOFC technology.The study shows that,compared to the un-doped LSCF,the Ba^(2+)-doped LBSCF possess higher electrical conductivities at 500-800℃ and display lower polarization resistances to oxygen adsorption/dissociation.As a result,the Ni-SDC|SDC|LBSCF0.20 cell(SDC=samarium-doped cerium,Sm_(0.2)Ce_(0.8)O_(1.9))delivers a high maximum power density of 0.704 W/cm^(2)at 750℃,which is>30%higher than the Ni-SDC|SDC|LSCF cell.This work reveals that Ba^(2+)-doping is effective in enhancing oxygen catalytic activity of LSCF-based cathode materials,demonstrating a new and commercial-feasible strategy in developing high performance cathode materials for the IT-SOFC technology. | Changkun Cai Manyi Xie Ke Xue Yu Shi Shuting Li Yuanyuan Liu Shengli An Hong Yang | 2022 | Nano Research2022，15，4： | 1 |
| 5 | The effects of sulfate reducing bacteria on corrosion of carbon steel Q235 under simulated disbonded coating by using electrochemical impedance spectroscopy显示文摘 | Jin Xu Kaixiong Wang Cheng Sun Fuhui Wang Ximing Li Jiaxing Yang Changkun Yu | 2011 | Corrosion Science2011，，4： | 1 |
| 6 | Electrodeposition of Ni oxide on TiO2 nanotube arrays for enhancing visible light photoelectrochemical water splitting显示文摘 | Yongkun Li Hongmei Yu Changkun Zhang | | 0，，： | 1 |
| 7 | An Oriented Ultrathin Catalyst Layer Derived from High Conductive TiO 2 Nanotube for Polymer Electrolyte Membrane Fuel Cell显示文摘 | Changkun Zhang Hongmei Yu Li Fu Yu Xiao Yuan Gao Yongkun Li Yachao Zeng Jia Baolian Yi Zhigang Shao | 2014 | Electrochimica Acta2014，，： | 1 |
| 8 | Single photon emitter deterministically coupled to a topological corner state显示文摘Incorporating topological physics into the realm of quantum photonics holds the promise of developing quantum light emitters with inherent topological robustness and immunity to backscattering.Nonetheless,the deterministic interaction of quantum emitters with topologically nontrivial resonances remains largely unexplored.Here we present a single photon emitter that utilizes a single semiconductor quantum dot,deterministically coupled to a second-order topological corner state in a photonic crystal cavity.By investigating the Purcell enhancement of both single photon count and emission rate within this topological cavity,we achieve an experimental Purcell factor of Fp=3.7.Furthermore,we demonstrate the on-demand emission of polarized single photons,with a second-order autocorrelation function g(2)(0)as low as 0.024±0.103.Our approach facilitates the customization of light-matter interactions in topologically nontrivial environments,thereby offering promising applications in the field of quantum photonics. | Mujie Rao Fulong Shi Zhixuan Rao Jiawei Yang Changkun Song Xiaodong Chen Jianwen Dong Ying Yu Siyuan Yu | 2024 | Light(Science & Applications)2024，13，1： | 0 |
| 9 | Bright semiconductor single-photon sources pumped by heterogeneously integrated micropillar lasers with electrical injections显示文摘The emerging hybrid integrated quantum photonics combines the advantages of different functional components into a single chip to meet the stringent requirements for quantum information processing.Despite the tremendous progress in hybrid integrations of III-V quantum emitters with silicon-based photonic circuits and superconducting single-photon detectors,on-chip optical excitations of quantum emitters via miniaturized lasers towards single-photon sources(SPSs)with low power consumptions,small device footprints,and excellent coherence properties is highly desirable yet illusive.In this work,we present realizations of bright semiconductor SPSs heterogeneously integrated with on-chip electrically-injected microlasers.Different from previous one-by-one transfer printing technique implemented in hybrid quantum dot(QD)photonic devices,multiple deterministically coupled QD-circular Bragg Grating(CBG)SPSs were integrated with electrically-injected micropillar lasers at one time via a potentially scalable transfer printing process assisted by the wide-field photoluminescence(PL)imaging technique.Optically pumped by electrically-injected microlasers,pure single photons are generated with a high-brightness of a count rate of 3.8 M/s and an extraction efficiency of 25.44%.Such a high-brightness is due to the enhancement by the cavity mode of the CBG,which is confirmed by a Purcell factor of 2.5.Our work provides a powerful tool for advancing hybrid integrated quantum photonics in general and boosts the developments for realizing highly-compact,energy-efficient and coherent SPSs in particular. | Xueshi Li Shunfa Liu Yuming Wei Jiantao Ma Changkun Song Ying Yu Rongbin Su Wei Geng Haiqiao Ni Hanqing Liu Xiangbin Su Zhichuan Niu You-ling Chen Jin Liu | 2023 | Light(Science & Applications)2023，12，3： | 0 |
| 10 | Resilience assessment model for urban public transportation systems based on structure and function显示文摘Urbanization and the increasing frequency of extreme climates affect the sustainability of urban public transportation systems,and improving resilience is one of the primary directions for sustainable development.To scientifically assess the resilience of urban public transportation systems,a resilience assessment model based on structure and function is established in this study.This model mathematically quantifies and simulates the structural and functional changes in public transportation systems under disruption scenarios and provides a comprehensive assessment of six abilities:1)structural resistance,2)structural recoverability,3)functional resistance,4)functional recoverability,5)passenger adaptability,and 6)management adaptability.Depending on the initial failure stations,this model can simulate the resilience of a public transportation system under various scenarios.This model is applied to assess the resilience of public transportation systems in a provincial capital city under an equipment failure scenario.The results show that the impact of equipment failure on resilience varies according to the metro lines,and improvement strategies for functional recoverability and management adaptability are proposed.The weaknesses in the resilience of urban public transportation systems can be identified using the proposed model,which helps provide strategies for improving the capacity to face perturbations. | Changkun Chen Fan He Rongfu Yu Siqi Wang Qile Dai | 2023 | Journal of Safety Science and Resilience2023，4，4： | 0 |
| 11 | Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources显示文摘Cavity-enhanced single quantum dots(QDs)are the main approach towards ultra-high-performance solid-state quantum light sources for scalable photonic quantum technologies.Nevertheless,harnessing the Purcell effect requires precise spectral and spatial alignment of the QDs’emission with the cavity mode,which is challenging for most cavities.Here we have successfully integrated miniaturized Fabry-Perot microcavities with a piezoelectric actuator,and demonstrated a bright single-photon source derived from a deterministically coupled QD within this microcavity.Leveraging the cavity-membrane structures,we have achieved large spectral tunability via strain tuning.On resonance,a high Purcell factor of~9 is attained.The source delivers single photons with simultaneous high extraction efficiency of 0.58,high purity of 0.956(2)and high indistinguishability of 0.922(4).Together with its compact footprint,our scheme facilitates the scalable integration of indistinguishable quantum light sources on-chip,therefore removing a major barrier to the development of solid-state quantum information platforms based on QDs. | Jiawei Yang Yan Chen Zhixuan Rao Ziyang Zheng Changkun Song Yujie Chen Kaili Xiong Pingxing Chen Chaofan Zhang Wei Wu Ying Yu Siyuan Yu | 2024 | Light(Science & Applications)2024，13，2： | 0 |
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