Self-Assembly of One-Dimensional Nanocrystal Superlattice Chains Mediated by Molecular Clusters

Zhang, Xianfeng; Lv, Longfei; Li, Ji; Guo, Guannan; Liu, Limin; Han, Dandan; Wang, Biwei; Tu, Yaqi; Hu, Jianhua; Yang, Dong

doi:10.1021/jacs.6b00055

Cited by 94 publications

(110 citation statements)

References 38 publications

(26 reference statements)

Supporting

Mentioning

109

Contrasting

Order By: Relevance

“…The initial stage of self‐organization was dominated by dipole–dipole attractions owing to the longer interacting distance of dipolar attraction forces (≈1/ r 3 ) than that of van der Waals interaction forces (≈1/ r 6 ) . The parallel alignment of dipolar vectors in dipole–dipole interactions have been demonstrated to be main driving force for the self‐organization of CdTe, CdSe, PbSe, PbS, Fe 3 O 4 , and Au NDs . Owing to the molecular rotations and ion/hydrogen migrations in CH 3 NH 3 PbBr 3 NCs, the dipolar vectors are direction variable, and the realignment of the dipolar vectors cannot be ignored during self‐organization.…”

Section: Figurementioning

confidence: 76%

Colloidal Synthesis of CH₃NH₃PbBr₃ Nanoplatelets with Polarized Emission through Self‐Organization

et al. 2017

View full text Add to dashboard Cite

We report a combined experimental and theoretical study of the synthesis of CH3NH3PbBr3 nanoplatelets through self‐organization. Shape transformation from spherical nanodots to square or rectangular nanoplatelets can be achieved by keeping the preformed colloidal nanocrystals at a high concentration (3.5 mg mL−1) for 3 days, or combining the synthesis of nanodots with self‐organization. The average thickness of the resulting CH3NH3PbBr3 nanoplatelets is similar to the size of the original nanoparticles, and we also noticed several nanoplatelets with circular or square holes, suggesting that the shape transformation experienced a self‐organization process through dipole–dipole interactions along with a realignment of dipolar vectors. Additionally, the CH3NH3PbBr3 nanoplatelets exhibit excellent polarized emissions for stretched CH3NH3PbBr3 nanoplatelets embedded in a polymer composite film, showing advantageous photoluminescence properties for display backlights.

show abstract

Section: Figurementioning

confidence: 76%

Colloidal Synthesis of CH₃NH₃PbBr₃ Nanoplatelets with Polarized Emission through Self‐Organization

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Of interest is that shoulders are observed between 600–700 nm in the UV/Vis spectra of AuNP frames and this cannot be ascribed to simple aggregation of AuNPs alone because in the AuNP sheet case, no shoulders in the SPR spectrum were observed. Detailed peak fittings (Supporting Information, Figure S5) reveal that the shoulders in the SPR spectra are from the secondary peaks between 600–700 nm and these secondary peaks can be attributed to the longitudinal SPR of AuNP chains as reported ,,. The weak intensity of the longitudinal peaks may be due to the relatively loose contact between adjacent AuNPs in the frames.…”

Section: Methodsmentioning

confidence: 65%

Precisely Assembled Cyclic Gold Nanoparticle Frames by 2D Polymer Single‐Crystal Templating

Mei

Zhou

2017

Angewandte Chemie

View full text Add to dashboard Cite

In recent decades,e xtensive studies have been devoted to assembling nanoparticles (NPs) into various ordered structures to achieve novel optical properties.H owever,i ts till remains ac hallenging task to assemble NPs into cyclic one-dimensional (1D) shapes,such as rings and frames. Herein, we report ad irected assembly method to precisely assemble NPs into well-defined, free-standing frames using polymer single crystals (PSCs) as the template.P reformed poly(ethylene oxide) (PEO) single crystals were used as the template to direct the crystallization of blockcopolymer (BCP) poly(ethylene oxide)-b-poly(4-vinylpyridine) (PEO-b-P4VP), which directs the gold NPs (AuNPs) to form AuNP frames.By controlling the PSC growth, we were able to,for the first time, precisely tune both the size and width of the AuNP frame. These novel AuNP frames topologically resemble NP nanorings and cyclic polymer chains,a nd show unique surface plasmon resonance (SPR) behaviors.

show abstract

“…Many significant assembly methods such as solvent evaporation, DNA matching, hydrophilic–hydrophobic interaction, emulsification, and covalent interaction have been successfully developed. However, most of these approaches are applied to assemble NBBs into simple geometries (planes, spheres, and rods/wires) rather than complex 3D superstructures. This is because of the difficulties in either engineering the interactions between individual nanoparticles or treating the complex effects caused by structure and micro‐environment .…”

Section: Introductionmentioning

confidence: 99%

Large‐Area 3D Hierarchical Superstructures Assembled from Colloidal Nanoparticles

Song

Yang

et al. 2019

Small

View full text Add to dashboard Cite

and covalent interaction [21] have been successfully developed. However, most of these approaches are applied to assemble NBBs into simple geometries (planes, [15] spheres, [19,20,22,23] and rods/wires [24] ) rather than complex 3D superstructures. This is because of the difficulties in either engineering the interactions between individual nanoparticles [18,23] or treating the complex effects caused by structure and micro-environment. [19,25,26] In addition, the domain size of the resulting assemblies is sometimes too small for practical applications. [27] Thus, organizing nanoparticles into superstructures with a diversity of morphologies on a macroscopic scale is critical yet still challenging.Template-traced assembly is an effective method for constructing 3D structures. [28] Of the reported templating methods, building blocks are usually trapped into nano/microgaps with high surface free energy or separated by a certain distance (tens to hundreds of nanometers) because of the inevitable repulsion between the identically charged building blocks. [29,30] This causes insufficient loading of NBBs on template surfaces and breaks the integrity of the 3D NBB assembly. Therefore, to achieve a continuous 3D NBB assembly, the interactions (e.g., electrostatic forces) between NBBs and templates should dominate the assembly process rather than the intrinsic properties (e.g., capillary force) of the templates. Enhancing the particle-particle binding (e.g., by hydrogen bonds (H-bonds)) and increasing the attraction between particles and templates are needed. Unfortunately, these would cause severe self-aggregation of nanoparticles in colloids. [31] Here, we designed an assembly method inspired by the fact that the double-layer citrate on the surface of Au nanospheres can stabilize Au nanosphere colloids in weakly acidic environment. [31,32] This is fulfilled by a steric hindrance generated by the outer citrate layer that covers the Au nanospheres. We used this steric hindrance to robustly balance loose assembly and random self-aggregation of NBBs. Dodecyl and double-layer citrate ligands were applied as steric hindrance, respectively, to increase the stability of the nanoparticle colloid when electrostatic forces and H-bonds were adjusted in the template/NBBs system (Figure 1). We chose butterfly wing scales-a group of chitin-based hierarchical photonic structure [33] -as structurally complex templates for NBB assembly. Through this method, Assembling nanosized building blocks into macroscopic 3D complex structures is challenging. Here, nanosized metal and semiconductor building blocks with a variety of sizes and shapes (spheres, stars, and rods) are successfully assembled into a broad range of hierarchical (nanometer to micrometer) assemblies of functional materials in centimeter size using butterfly wings as templates. This is achieved by the introduction of steric hindrance to the assembly process, which compensates for attraction from the environmentally sensitive hydrogen bonds and prevents the aggregation of nanosiz...

show abstract

Self-Assembly of One-Dimensional Nanocrystal Superlattice Chains Mediated by Molecular Clusters

Cited by 94 publications

References 38 publications

Colloidal Synthesis of CH₃NH₃PbBr₃ Nanoplatelets with Polarized Emission through Self‐Organization

Colloidal Synthesis of CH₃NH₃PbBr₃ Nanoplatelets with Polarized Emission through Self‐Organization

Precisely Assembled Cyclic Gold Nanoparticle Frames by 2D Polymer Single‐Crystal Templating

Large‐Area 3D Hierarchical Superstructures Assembled from Colloidal Nanoparticles

Contact Info

Product

Resources

About

Self-Assembly of One-Dimensional Nanocrystal Superlattice Chains Mediated by Molecular Clusters

Cited by 94 publications

References 38 publications

Colloidal Synthesis of CH3NH3PbBr3 Nanoplatelets with Polarized Emission through Self‐Organization

Colloidal Synthesis of CH3NH3PbBr3 Nanoplatelets with Polarized Emission through Self‐Organization

Precisely Assembled Cyclic Gold Nanoparticle Frames by 2D Polymer Single‐Crystal Templating

Large‐Area 3D Hierarchical Superstructures Assembled from Colloidal Nanoparticles

Contact Info

Product

Resources

About

Colloidal Synthesis of CH₃NH₃PbBr₃ Nanoplatelets with Polarized Emission through Self‐Organization

Colloidal Synthesis of CH₃NH₃PbBr₃ Nanoplatelets with Polarized Emission through Self‐Organization