Nanofilms that can fast permeate solvents and accurately sieve molecules are of significant importance for separation.A promising strategy is to align the inner cavities of macrocycles into the channels within nanofil...Nanofilms that can fast permeate solvents and accurately sieve molecules are of significant importance for separation.A promising strategy is to align the inner cavities of macrocycles into the channels within nanofilms,and control the channel size by selecting the macrocycles.However,the channels outside the macrocycles are ignored.Here,we prepare nanofilms with hydrophobic channels(cyclodextrin inner cavity)and hydrophilic channels(cyclodextrin outer space)through interfacial polymerization of azobenzene-4,4’-dicarbonyl dichloride and amino-functionalizedβ-cyclodextrin.By utilizing the significant geometric changes caused by the photoisomerization of azobenzene,nanofilms with adjustable hydrophilic channel sizes were obtained.Our nanofilms have high permeability to polar and non-polar solvents,and can distinguish molecules with almost the same molecular weight but different shapes.This work expands the development of next-generation nanofilms generated through interfacial polymerization by incorporating rational molecular design.展开更多
Lots of research on thermoelectric materials(TEs)has focused on improving their thermoelectric(TE)properties to achieve efficient energy conversion.However,the mechanical properties of materials are also the object of...Lots of research on thermoelectric materials(TEs)has focused on improving their thermoelectric(TE)properties to achieve efficient energy conversion.However,the mechanical properties of materials are also the object of concern in practical applications.Nowadays,the field of electronic devices is obviously developing in the direction of flexible electronics,so the research on TEs should also consider the plasticity.Since 2018,it has been discovered that inorganic semiconductor materials have the ability of plastic deformation,giving new possibilities for the development of TEs with plasticity.This paper focuses on the TEs with two-dimensional van der Waals(2D vdW)crystal structures,which have good plasticity but low TE properties.However,these materials have the potential to become excellent materials with TE properties and good plasticity through optimization strategies.In this paper,the latest research progress of 2D vdW TE materials and their applications in electronic devices are reviewed.The plasticity and TE properties of 2D vdW materials with M_(2)X,MX and MX_(2) structure are summarized,and their plasticity mechanisms are discussed.We also introduce the application of high throughput screening in the discovery of novel 2D vdW plastic materials,and outline the future research work of 2D vdW TE materials.展开更多
基金supported by the National Natural Science Foundation of China(No.22090050)National Key Research and Development Program of China(No.2021YFA1200403)+3 种基金Joint NSFC-ISF Research Grant Program(No.22161142020)Natural Science Foundation of Hubei Province(No.2020CFA037)Zhejiang Provincial Natural Science Foundation of China(No.LD21B050001)Key Research and Development and Promotion Projects in Henan Province(Nos.212102310081 and 232102320125).
文摘Nanofilms that can fast permeate solvents and accurately sieve molecules are of significant importance for separation.A promising strategy is to align the inner cavities of macrocycles into the channels within nanofilms,and control the channel size by selecting the macrocycles.However,the channels outside the macrocycles are ignored.Here,we prepare nanofilms with hydrophobic channels(cyclodextrin inner cavity)and hydrophilic channels(cyclodextrin outer space)through interfacial polymerization of azobenzene-4,4’-dicarbonyl dichloride and amino-functionalizedβ-cyclodextrin.By utilizing the significant geometric changes caused by the photoisomerization of azobenzene,nanofilms with adjustable hydrophilic channel sizes were obtained.Our nanofilms have high permeability to polar and non-polar solvents,and can distinguish molecules with almost the same molecular weight but different shapes.This work expands the development of next-generation nanofilms generated through interfacial polymerization by incorporating rational molecular design.
基金supported by the Guangxi Science and Technology Major Program(No.AA23073019)the State Key Laboratory of New Ceramic and Fine Processing Tsinghua University(No.KFZD202303)。
文摘Lots of research on thermoelectric materials(TEs)has focused on improving their thermoelectric(TE)properties to achieve efficient energy conversion.However,the mechanical properties of materials are also the object of concern in practical applications.Nowadays,the field of electronic devices is obviously developing in the direction of flexible electronics,so the research on TEs should also consider the plasticity.Since 2018,it has been discovered that inorganic semiconductor materials have the ability of plastic deformation,giving new possibilities for the development of TEs with plasticity.This paper focuses on the TEs with two-dimensional van der Waals(2D vdW)crystal structures,which have good plasticity but low TE properties.However,these materials have the potential to become excellent materials with TE properties and good plasticity through optimization strategies.In this paper,the latest research progress of 2D vdW TE materials and their applications in electronic devices are reviewed.The plasticity and TE properties of 2D vdW materials with M_(2)X,MX and MX_(2) structure are summarized,and their plasticity mechanisms are discussed.We also introduce the application of high throughput screening in the discovery of novel 2D vdW plastic materials,and outline the future research work of 2D vdW TE materials.
