The development of nanoporous membrane structure provides a potential opportunity for the advanced ultra-thin liquid film evaporation process,for which the ability of effectively and continuously maintaining the nano-...The development of nanoporous membrane structure provides a potential opportunity for the advanced ultra-thin liquid film evaporation process,for which the ability of effectively and continuously maintaining the nano-thin liquid film is crucial to realize its superior performance.In this work,we elucidated the nanopore-based ultra-thin water film evaporation characteristics with non-equilibrium molecular dynamics simulation.A self-pumping water transport through the nanopore was observed,which is attributed to the driving force induced by the evaporation meniscus of thin liquid film.The dry-out crisis will occur with the increasing membrane thickness.We demonstrated that the hydrophobic carbon nanotube(CNT)can be utilized as the coating inside the hydrophilic silicon nitride(Si_(3)N_(4))nanopore,which reduces the flow resistance and presents an excellent capability to replenish the evaporated water.Based on the above findings,the internal coating of CNT is an advisable strategy for nanopore-based ultra-thin liquid film evaporation,possessing a stable high evaporation flux as well as a good mechanical strength.展开更多
Cu2ZnSn（S,Se）4（CZTSSe） thin film was prepared using a simple two-step approach based on the single-source evaporation and synchronous sulfo-selenization.Composition,microstructure,morphology,and properties of the ...Cu2ZnSn（S,Se）4（CZTSSe） thin film was prepared using a simple two-step approach based on the single-source evaporation and synchronous sulfo-selenization.Composition,microstructure,morphology,and properties of the asprepared CZTSSe thin films were investigated.XRD and Raman patterns confirmed the formation of single-phase CZTSSe solid solutions.SEM results showed that the CZTSSe thin film had a uniform morphology and large grains.EDS results revealed the composition of CZTSSe film was Cu：Zn：Sn：S：Se = 23.7：12.6：12.2：37.7：13.8（in at%）,which was in accordance with the stoichiometric Cu2ZnSn（S,Se）4.The optical band gap of CZTSSe thin film evaluated from its UV–Vis spectrum was 1.33 eV.The resistivity,carrier concentration,and mobility were 0.53 X cm,7.9 9 1018cm3,and 7.5 cm2/（Vs）,respectively.展开更多
基金the National Natural Science Foundation of China(No.51676124).
文摘The development of nanoporous membrane structure provides a potential opportunity for the advanced ultra-thin liquid film evaporation process,for which the ability of effectively and continuously maintaining the nano-thin liquid film is crucial to realize its superior performance.In this work,we elucidated the nanopore-based ultra-thin water film evaporation characteristics with non-equilibrium molecular dynamics simulation.A self-pumping water transport through the nanopore was observed,which is attributed to the driving force induced by the evaporation meniscus of thin liquid film.The dry-out crisis will occur with the increasing membrane thickness.We demonstrated that the hydrophobic carbon nanotube(CNT)can be utilized as the coating inside the hydrophilic silicon nitride(Si_(3)N_(4))nanopore,which reduces the flow resistance and presents an excellent capability to replenish the evaporated water.Based on the above findings,the internal coating of CNT is an advisable strategy for nanopore-based ultra-thin liquid film evaporation,possessing a stable high evaporation flux as well as a good mechanical strength.
基金financially supported by the National Natural Science Foundation of China (Nos.51275509 and 51175491)
文摘Cu2ZnSn（S,Se）4（CZTSSe） thin film was prepared using a simple two-step approach based on the single-source evaporation and synchronous sulfo-selenization.Composition,microstructure,morphology,and properties of the asprepared CZTSSe thin films were investigated.XRD and Raman patterns confirmed the formation of single-phase CZTSSe solid solutions.SEM results showed that the CZTSSe thin film had a uniform morphology and large grains.EDS results revealed the composition of CZTSSe film was Cu：Zn：Sn：S：Se = 23.7：12.6：12.2：37.7：13.8（in at%）,which was in accordance with the stoichiometric Cu2ZnSn（S,Se）4.The optical band gap of CZTSSe thin film evaluated from its UV–Vis spectrum was 1.33 eV.The resistivity,carrier concentration,and mobility were 0.53 X cm,7.9 9 1018cm3,and 7.5 cm2/（Vs）,respectively.
