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8篇 您的检索式:作者名="Gyumin"
    题名 作者 年代 出处 被引量
1Pitch-dependent acceleration of neurite outgrowth on nano- structured anodized aluminum oxide substrates显示文摘Woo Kyung Cho Kyungtae Kang Gyumin Kang 2010Angew Chem Int Ed2010,,:1
2Rapid crystallization-driven high-efficiency phase-pure deep-blue Ruddlesden–Popper perovskite light-emitting diodes显示文摘Perovskite light-emitting diodes(PeLEDs)are considered as promising candidates for nextgeneration solution-processed full-color displays.However,the external quantum efficiencies(EQEs)and operational stabilities of deep-blue(<460 nm)PeLEDs still lag far behind their red and green counterparts.Herein,a rapid crystallization method based on hot-antisolvent bathing is proposed for realization of deep-blue PeLEDs.By promoting immediate removal of the precursor solvent from the wet perovskite films,development of the quasi-two-dimensional(2D)Ruddlesden–Popper perovskite(2D-RPP)crystals with n values>3 is hampered completely,so that phase-pure 2D-RPP films with bandgaps suitable for deep-blue PeLEDs can be obtained successfully.The uniquely developed rapid crystallization method also enables formation of randomly oriented 2D-RPP crystals,thereby improving the transfer and transport kinetics of the charge carriers.Thus,high-performance deep-blue PeLEDs emitting at 437 nm with a peak EQE of 0.63%are successfully demonstrated.The color coordinates are confirmed to be(0.165,0.044),which match well with the Rec.2020 standard blue gamut and have excellent spectral stability.Gyumin Jang Hyowon Han Sunihl Ma Junwoo Lee Chan Uk Lee Wooyong Jeong Jaehyun Son Dongki Cho Ji-Hee Kim Cheolmin Park Jooho Moon 2023Advanced Photonics2023,5,1:1
3Moderating effects of gender and organizational level between role stress and job satisfaction among hotel employees显示文摘BeomCheol Peter Kim Suzanne K. Murrmann Gyumin Lee 2009International Journal of Hospitality Management2009,,4:1
4Employee Satisfaction with Schedule Flexi- bility: Psychological Antecedents and Consequences within the Workplace 显示文摘Gyumin Lee Vincent P Magnini 2011International Journal of Hospitality Management2011,30,1:1
5Moderating Ef- fects of Gender and Organizational Level between Role Stress and Job Sati- sfaction among Hotel Employees 显示文摘BeomCheol Peter Kim Suzanne K Murrmann Gyumin Lee 2009International Journal of Hospitality Management2009,28,4:1
6Installing a molecular truss beam stabilizes MOF structures显示文摘Enhancing the stability and durability of metal-organic frameworks(MOFs)is vital for practical applications because many promising MOF materials suffer from phase transitions and/or structural decompositions with humidity being a particularly damaging condition.In mechanical engineering,the frame of buildings and furniture can be stabilized significantly by installing a truss beam.Employing the same principle,we functionalized the organic component of MOF-5 to contain a carbazole moiety that can act as a molecular truss beam by reaching across the corner and forming a stableπ–πinteraction with a phenyl group on the edge position of the MOF-skeleton.This structural support enhanced the stability of the MOF substantially,allowing the designed MOF to maintain compositional integrity under steam conditions at 90℃for~5 days.The unmodified MOF-5 shows clear signs of structural collapse after~1 h.Hong Ki Kim Jong-Yeong Jung Gyumin Kang Mu-Hyun Baik Eun-Young Choi 2022npj Computational Materials2022,,1:0
7Optimally arranged TiO_(2)@MoS_(2) heterostructures with effectively induced built-in electric field for high-performance lithium-sulfur batteries显示文摘To overcome the serious technological issues affecting lithium-sulfur(Li-S) batteries,such as sluggish sulfur redox kinetics and the detrimental shuttle effect,heterostructure engineering has been investigated as a strategy to effectively capture soluble lithium polysulfide intermediates and promote their conversion reaction by integrating highly polar metal oxides with catalytically active metals sulfides.However,to fully exploit the outstanding properties of heterostructure-based composites,their detailed structure and interfacial contacts should be designed rationally.Herein,optimally arranged TiO_(2)and MoS_(2)-based heterostructures(TiO_(2)@MoS_(2)) are fabricated on carbon cloth as a multifunctional interlayer to efficiently trap polysulfide intermediates and accelerate their redox kinetics.Owing to the synergistic effects between TiO_(2)and MoS_(2)and the uniform heterointerface distribution that induces the ideally oriented built-in electric field,Li-S batteries with TiO_(2)@MoS_(2)interlayers exhibit high rate capability(601 mA h g^(-1)at 5 C),good cycling stability(capacity-fade rate of 0.067% per cycle over 500 cycles at2 C),and satisfactory areal capacity(5.2 mA h cm^(-2)) under an increased sulfur loading of 5.2 mg cm^(-2).Moreover,by comparing with a MoS_(2)@TiO_(2)interlayer composed of reversely arranged heterostructures,the effect of the built-in electric field’s direction on the electrocatalytic reactions of polysulfide intermediates is thoroughly investigated for the first time.The superior electrocatalytic activities of the rationally arranged TiO_(2)@MoS_(2)interlayer demonstrate the importance of optimizing the built-in electric field of heterostructures for producing high-performance Li-S batteries.Jeongyoub Lee Changhoon Choi Jung Been Park Seungho Yu Jinho Ha Hyungsoo Lee Gyumin Jang Young Sun Park Juwon Yun Hayoung Im Subin Moon Soobin Lee Jung-Il Choi Dong-Wan Kim Jooho Moon 2023Journal of Energy Chemistry2023,,8:0
8Efficient solar fuel production enabled by an iodide oxidation reaction on atomic layer deposited MoS_(2)显示文摘Oxygen evolution reaction(OER)as a half-anodic reaction of water splitting hinders the overall reaction efficiency owing to its thermodynamic and kinetic limitations.Iodide oxidation reaction(IOR)with low thermodynamic barrier and rapid reaction kinetics is a promising alternative to the OER.Herein,we present a molybdenum disulfide(MoS_(2))electrocatalyst for a high-efficiency and remarkably durable anode enabling IOR.MoS_(2)nanosheets deposited on a porous carbon paper via atomic layer deposition show an IOR current density of 10 mA cm^(–2)at an anodic potential of 0.63 V with respect to the reversible hydrogen electrode owing to the porous substrate as well as the intrinsic iodide oxidation capability of MoS_(2)as confirmed by theoretical calculations.The lower positive potential applied to the MoS_(2)-based heterostructure during IOR electrocatalysis prevents deterioration of the active sites on MoS_(2),resulting in exceptional durability of 200 h.Subsequently,we fabricate a two-electrode system comprising a MoS_(2)anode for IOR combined with a commercial Pt@C catalyst cathode for hydrogen evolution reaction.Moreover,the photovoltaic–electrochemical hydrogen production device comprising this electrolyzer and a single perovskite photovoltaic cell shows a record-high current density of 21 mA cm^(–2)at 1 sun under unbiased conditions.Young Sun Park Gyumin Jang Inkyu Sohn Hyungsoo Lee Jeiwan Tan Juwon Yun Sunihl Ma Jeongyoub Lee Chan Uk Lee Subin Moon Hayoung Im Seung-Min Chung Seungho Yu Hyungjun Kim Jooho Moon 2023Carbon Energy2023,5,12:0
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