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
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.
