Self-assembly of colloidal nanocrystals(NCs)into large-scale superlattices with complex and controllable structures has attracted extensive attention due to their collective properties and promising device application...Self-assembly of colloidal nanocrystals(NCs)into large-scale superlattices with complex and controllable structures has attracted extensive attention due to their collective properties and promising device applications.Plasmonic NCs are very popular for long-range ordered superstructures by virtue of their collective nanogaps for electromagnetic field enhancement,in particular bulk-scale single-layer assembly.Large-area two-dimensional(2D)quasinanosheets(QNSs)composed of mono-component Au NCs or multi-component Au@ZnS core-shell hetero-nanocrystals(HNCs)were successfully prepared,via careful solvent evaporation-induced interfacial self-assembly.The entire selfassembly process was carried out on the liquid-air surface and mediated simply by tuning the operating temperatures and concentrations of the NCs.Specifically,monolayer and double-layer 2D QNSs in tens of micrometers scale with different stacking models were fabricated by precisely controlling the solvent evaporation rate and colloidal concentration.展开更多
Ultrathin nanostructures have attracted much attention in recent years due to their predictable novel properties and various potential applications. The improvement in synthetic skills has led to many successful synth...Ultrathin nanostructures have attracted much attention in recent years due to their predictable novel properties and various potential applications. The improvement in synthetic skills has led to many successful syntheses of nanostructures including zerodimensional (0D) nanoclusters, one-dimensional (1D) nanowires, two-dimensional (2D) nanosheets and other higher-level complex nanostructures, where cluster-assembly of primary nanocrystals is a common process. In this review, progress in ultrathin nanocrystals in the last decade and several important factors in the growth mechanisms are covered. By giving examples of cluster assembly from 1D to 3D nanostructures, the utility of cluster assembly in the synthesis of new materials has been demonstrated.展开更多
The assembly of nanocrystals into ordered structures called supercrystals or superstructures has become a pivotal frontier owing to numerous useful applications such as correlating the arrangements of atoms in macrosc...The assembly of nanocrystals into ordered structures called supercrystals or superstructures has become a pivotal frontier owing to numerous useful applications such as correlating the arrangements of atoms in macroscopic crystals and tuning the collective properties to meet the demands of various applications. In this article, recent progress in the preparation of three-dimensional superlattices of nanocrystals is outlined, with a particular emphasis on the driving forces and evolutionary routes beyond orderly assembly. First, the leading or repulsive forces that internally and externally govern the formation of three-dimensional supercrystals are systematically identified and discussed with respect to their origins and functions in three-dimensional self-organization. Then a synoptic introduction of commonly applied means of nanocrystal self-assembly based on growth scenarios such as droplet evaporation and a liquid/liquid interface is presented with specific cases and detailed analyses. Finally, the existing challenges and prospects for this field are briefly highlighted.展开更多
A facile approach to assembled virus film with tunable structure is presented.Rod-like tobacco mosaic virus (TMV) was selected as the prototype in this study for its anisotropic structural feature.TMV can either "...A facile approach to assembled virus film with tunable structure is presented.Rod-like tobacco mosaic virus (TMV) was selected as the prototype in this study for its anisotropic structural feature.TMV can either "lie down" or "stand up" on gold substrate by tuning the solution pH.A quartz crystal microbalance with dissipation monitoring was used to monitor the pH-dependent self-assembly behavior of TMV nanoparticles,and atomic force microscopy and single molecule force spectroscopy further confirmed the different assembly structures.展开更多
基金supported by the National Natural Science Foundation of China(NSFC,51872030,51631001,21801015,21643003,51702016,51501010 and 21703219)the Fundamental Research Funds for the Central Universities+1 种基金Beijing Institute of Technology Research Fund Program for Young ScholarsJoint R&D Plan of HongKong,Macao,Taiwan and Beijing(Z191100001619002)。
文摘Self-assembly of colloidal nanocrystals(NCs)into large-scale superlattices with complex and controllable structures has attracted extensive attention due to their collective properties and promising device applications.Plasmonic NCs are very popular for long-range ordered superstructures by virtue of their collective nanogaps for electromagnetic field enhancement,in particular bulk-scale single-layer assembly.Large-area two-dimensional(2D)quasinanosheets(QNSs)composed of mono-component Au NCs or multi-component Au@ZnS core-shell hetero-nanocrystals(HNCs)were successfully prepared,via careful solvent evaporation-induced interfacial self-assembly.The entire selfassembly process was carried out on the liquid-air surface and mediated simply by tuning the operating temperatures and concentrations of the NCs.Specifically,monolayer and double-layer 2D QNSs in tens of micrometers scale with different stacking models were fabricated by precisely controlling the solvent evaporation rate and colloidal concentration.
基金supported by the National Natural Science Foundation of China (91127040, 20921001)the National Basic Research Program of China (973 Program, 2011CB932402)
文摘Ultrathin nanostructures have attracted much attention in recent years due to their predictable novel properties and various potential applications. The improvement in synthetic skills has led to many successful syntheses of nanostructures including zerodimensional (0D) nanoclusters, one-dimensional (1D) nanowires, two-dimensional (2D) nanosheets and other higher-level complex nanostructures, where cluster-assembly of primary nanocrystals is a common process. In this review, progress in ultrathin nanocrystals in the last decade and several important factors in the growth mechanisms are covered. By giving examples of cluster assembly from 1D to 3D nanostructures, the utility of cluster assembly in the synthesis of new materials has been demonstrated.
基金This work was partially supported DOE STFR program and CEI grant 68195. C. W. thanks ＂Dissertation Fellowship Award＂ supported by the State University of New York at Binghamton C. S. is partially supported by the Provost＇s Summer Doctoral Fellowship and J. Z. acknowledges grants （the National Natural Science Foundation of China （Nos. 21471160 and 14CX05037A）） and TaiShan Scholar Foundation.
文摘The assembly of nanocrystals into ordered structures called supercrystals or superstructures has become a pivotal frontier owing to numerous useful applications such as correlating the arrangements of atoms in macroscopic crystals and tuning the collective properties to meet the demands of various applications. In this article, recent progress in the preparation of three-dimensional superlattices of nanocrystals is outlined, with a particular emphasis on the driving forces and evolutionary routes beyond orderly assembly. First, the leading or repulsive forces that internally and externally govern the formation of three-dimensional supercrystals are systematically identified and discussed with respect to their origins and functions in three-dimensional self-organization. Then a synoptic introduction of commonly applied means of nanocrystal self-assembly based on growth scenarios such as droplet evaporation and a liquid/liquid interface is presented with specific cases and detailed analyses. Finally, the existing challenges and prospects for this field are briefly highlighted.
基金supported by the National Natural Science Foundation of China (20423003 & 20774097)Z.S. thanks the NSFC Fund for Creative Research Groups (50921062) for support+1 种基金the financial support from US NSF (DMR-0706431, CHE-0748690)US DoD, US DoE-BES, and the W. M. Keck Foundation
文摘A facile approach to assembled virus film with tunable structure is presented.Rod-like tobacco mosaic virus (TMV) was selected as the prototype in this study for its anisotropic structural feature.TMV can either "lie down" or "stand up" on gold substrate by tuning the solution pH.A quartz crystal microbalance with dissipation monitoring was used to monitor the pH-dependent self-assembly behavior of TMV nanoparticles,and atomic force microscopy and single molecule force spectroscopy further confirmed the different assembly structures.
