Challenging traditional Western painting rules, modem paintings depict one object from multi-angles and advocate the autonomy of art. Seldom do people know that Faulkner loved painting when he was young and modem pain...Challenging traditional Western painting rules, modem paintings depict one object from multi-angles and advocate the autonomy of art. Seldom do people know that Faulkner loved painting when he was young and modem paintings exert a subtle influence on him. In his Yoknapatawpha, William Faulkner breaks the time and space order and the consistency of plot in traditional novels, which demonstrates aesthetic effect of modem painting and embodies the allegation of modern painting that art is autonomous. This paper will analyze the deep influence of modern painting on Faulkner＇s writing techniques and language characteristics, providing a new perspective to aonreciate the art of Faulkner＇s Yoknapatawpha.展开更多
Two-dimensional transition metal dichalcogenides heterostructures have stimulated wide in- terest not only for the fundamental research, but also for the application of next generation electronic and optoelectronic de...Two-dimensional transition metal dichalcogenides heterostructures have stimulated wide in- terest not only for the fundamental research, but also for the application of next generation electronic and optoelectronic devices. Herein, we report a successful two-step chemical vapor deposition strategy to construct vertically stacked van der Waals epitaxial In2Se3/MoSe2 heterostructures. Transmission electron microscopy characterization reveals clearly that the In2Se3 has well-aligned lattice orientation with the substrate of monolayer MoSe2. Due to the interaction between the In2Se3 and MoSe2 layers, the heterostructure shows the quench- ing and red-shift of photoluminescence. Moreover, the current rectification behavior and photovoltaic effect can be observed from the heterostructure, which is attributed to the unique band structure alignment of the heterostructure, and is further confirmed by Kevin probe force microscopy measurement. The synthesis approach via van der Waals epitaxy in this work can expand the way to fabricate a variety of two-dimensional heterostructures for potential applications in electronic and optoelectronic devices.展开更多
Lithium-sulfur batteries(LSBs) hold great potential for large-scale electrochemical energy storage applications. Currently, the shuttle of soluble lithium polysulfide(LiPSs) intermediates with sluggish conversion kine...Lithium-sulfur batteries(LSBs) hold great potential for large-scale electrochemical energy storage applications. Currently, the shuttle of soluble lithium polysulfide(LiPSs) intermediates with sluggish conversion kinetics and random deposition of Li2S have severely degraded the capacity, rate and cycling performances of LSBs, preventing their practical applications. In this work, ultrathin MoSe2 nanosheets with active edge sites were successfully grown on both internal and external surfaces of hollow carbon spheres with mesoporous walls(MCHS). The resulting MoSe2@MCHS composite acted as a novel functional reservoir for Li PSs with high chemical affinity and effectively mediated their fast redox conversion during charge/discharge as elucidated by experimental observations and first-principles density functional theory(DFT) calculations. The as-fabricated Li-S cells delivered high capacity, superior rate and excellent cyclability. The current work presents new insights on the delicate design and fabrication of novel functional composite electrode materials for rechargeable batteries with emerging applications.展开更多
文摘Challenging traditional Western painting rules, modem paintings depict one object from multi-angles and advocate the autonomy of art. Seldom do people know that Faulkner loved painting when he was young and modem paintings exert a subtle influence on him. In his Yoknapatawpha, William Faulkner breaks the time and space order and the consistency of plot in traditional novels, which demonstrates aesthetic effect of modem painting and embodies the allegation of modern painting that art is autonomous. This paper will analyze the deep influence of modern painting on Faulkner＇s writing techniques and language characteristics, providing a new perspective to aonreciate the art of Faulkner＇s Yoknapatawpha.
文摘Two-dimensional transition metal dichalcogenides heterostructures have stimulated wide in- terest not only for the fundamental research, but also for the application of next generation electronic and optoelectronic devices. Herein, we report a successful two-step chemical vapor deposition strategy to construct vertically stacked van der Waals epitaxial In2Se3/MoSe2 heterostructures. Transmission electron microscopy characterization reveals clearly that the In2Se3 has well-aligned lattice orientation with the substrate of monolayer MoSe2. Due to the interaction between the In2Se3 and MoSe2 layers, the heterostructure shows the quench- ing and red-shift of photoluminescence. Moreover, the current rectification behavior and photovoltaic effect can be observed from the heterostructure, which is attributed to the unique band structure alignment of the heterostructure, and is further confirmed by Kevin probe force microscopy measurement. The synthesis approach via van der Waals epitaxy in this work can expand the way to fabricate a variety of two-dimensional heterostructures for potential applications in electronic and optoelectronic devices.
基金financially supported by the National Natural Science Foundation of China (51302204, 21902122)Postdoctoral Science Foundation of China (2019M652723)+2 种基金Hunan Provincial Science and Technology Plan Project (No.2017TP1001)Program for Changjiang Scholars and Innovative Research Team in University (IRT_15R52)Hubei Provincial Department of Education for the “Chutian Scholar” program。
文摘Lithium-sulfur batteries(LSBs) hold great potential for large-scale electrochemical energy storage applications. Currently, the shuttle of soluble lithium polysulfide(LiPSs) intermediates with sluggish conversion kinetics and random deposition of Li2S have severely degraded the capacity, rate and cycling performances of LSBs, preventing their practical applications. In this work, ultrathin MoSe2 nanosheets with active edge sites were successfully grown on both internal and external surfaces of hollow carbon spheres with mesoporous walls(MCHS). The resulting MoSe2@MCHS composite acted as a novel functional reservoir for Li PSs with high chemical affinity and effectively mediated their fast redox conversion during charge/discharge as elucidated by experimental observations and first-principles density functional theory(DFT) calculations. The as-fabricated Li-S cells delivered high capacity, superior rate and excellent cyclability. The current work presents new insights on the delicate design and fabrication of novel functional composite electrode materials for rechargeable batteries with emerging applications.
