Metastable Self‐Assembly of Theta‐Shaped Colloids and Twinning of Their Crystal Phases

Wang, Linna; Lu, Jiawei; Liu, Bing

doi:10.1002/ange.201908256

Cited by 8 publications

(4 citation statements)

References 55 publications

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“…In addition to rod-like particles, ellipsoidal particles with different chemical properties of the surface can also be assembled in richer structures of colloidal crystals by depletion attractions. Wang et al (Wang L. et al, 2019) synthesized columnar spherical silica particles with a PS girdle in the middle, as shown in Figure 4D, which have theta-shaped surface chemistry. When situated on a quasitwo-dimensional plane, these particles could form two types of ordered structures through depletion attraction.…”

Section: Preparation Of Colloidal Crystals By Depletion Attractionmentioning

confidence: 99%

“…FIGURE 4 (A) Schematic of overlapped excluded volumes of particles at different locations of the container; (B) Silica microspheres self-assemble into multilayer ordered structures at the air-water interface (Kim K. et al, 2019); (C) Schematic illustration showing the superlattices of TMV self-assembled in response to temperature and concentration (Li et al, 2013b); (D) Prone crystals and standing crystals self-assembled by θ-shape SiO 2 particles(Wang L. et al, 2019).…”

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confidence: 99%

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Depletion attraction in colloidal and bacterial systems

Zhang,

Kong,

Zhang

et al. 2023

Front. Mater.

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Depletion attraction is a common entropy force observed in colloidal systems. As a common phenomenon in colloidal and bacterial systems, studying the mechanism and application of depletion attraction is of great value for controlling the state of colloidal solutions, regulating the morphology of colloidal particles, disease treatment, and water pollution treatment. Based on the current research status, we briefly introduce the calculation and measurement methods of depletion attractions. And we review the application of depletion attractions in colloidal systems, and summarize the different phenomena and aggregation mechanisms caused by depletion attraction in active colloidal particle-bacterial systems. Understanding the specific role of depletion aggregation in colloidal and bacterial systems provides more possibilities for further exploring depletion aggregation mechanisms and utilizing depletion aggregation phenomena in nature.

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Section: Preparation Of Colloidal Crystals By Depletion Attractionmentioning

confidence: 99%

mentioning

confidence: 99%

Depletion attraction in colloidal and bacterial systems

Zhang,

Kong,

Zhang

et al. 2023

Front. Mater.

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“…Among this large variety of dendritic chemical structures, amphiphilic dendrimers, due to their well-defined architectures and shape persistence, have attracted considerable attention in the field of bottom-up hierarchical self-assembly for decades and found great applications in myriad fields, including supramolecular chemistry, gene transfection, drug delivery, and catalysis, to name but a few. [1][2][3][4][5][6][7][8][9][10] Unfortunately, a grand challenge to yield the delicate dendrimers requires tedious multistep reactions, purification processes, and stringent experimental conditions, which significantly limit the varieties and scopes of dendritic self-assembly.…”

Section: Introductionmentioning

confidence: 99%

A Robust Strategy for Precise Fabrication of Rigid–Flexible Coupling Dendrimers toward Self-Coordinated Hierarchical Assembly

et al. 2021

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Advances in nanotechnology depend upon expanding the ability to create biologically inspired complex materials with well-defined multidimensional structures. Fabrication of hybrid hierarchical structures by combining colloidal organic and inorganic building blocks remains a challenge due to the difficulty in preparing a diverse spectrum of rigid-flexible coupling units of precise shape and size. Herewe report a general strategy for crafting a myriad of uniform aggregates via manipulating self-assembly of distinct dendrimers with precisely controlled polyhedral oligomeric silsesquioxane (POSS)-embedded cores integrating stiffness and ductility. The rigidity of POSS units exerts steric effects on self-amplification of hydrophobic domains while the flexibility from internally ductile linkages provides ideal scenarios in establishing self-adaptive structural optimization, which subsequently drive the assemblies to proceed into hierarchical self-assembly via multiple coordination effects, generating highly complex multicompartment micelles (MCMs) without any preprocessing. Our facile approach enables a robust modular nanofabrication of well-organized dendrimers toward artificial functional systems with defined geometric architectures and intriguing functions for advanced biological applications.

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“…[1,5] Fabrication of 2D and 3D CCs has attracted much interests. [2,[10][11][12][13] For example, randomly stacked hexagonal close packing is generally found in CCs formed by hard-sphere NPs, whereas soft CCs formed from polymeric NPs normally exhibit a face-centered cubic (fcc) structure. [2] Recent studies on assemblies of lead chalcogenide NPs also revealed the formation of hexagonal close-packed (hcp), body-centered cubic (bcc), and body-centered tetragonal (bct) superlattices.…”

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confidence: 99%

Fabrication of Oriented Colloidal Crystals from Capillary Assembly of Polymer‐Tethered Gold Nanoparticles

Gao

Zhou

et al. 2022

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Self‐assembled colloidal crystals (CCs) or nanoparticle (NPs) superlattices have attracted significant attention due to their potential applications in many fields. However, due to the complex interactions that govern the self‐assembly, it is difficult to predict and control the superstructure organization of CCs. Herein, a facile yet effective way is demonstrated to fabricate oriented CCs from capillary assembly of polymer‐tethered gold NPs (AuNPs). Assembly mechanism of polymer‐tethered AuNPs and their superlattice structures are systematically studied by in situ small‐angle X‐ray scattering (SAXS) technology. The results show that the oriented CCs of polymer‐tethered AuNPs can be obtained upon solvent evaporation in a capillary tube and the oriented structure is mainly determined by the chain length of polymer ligands and size of AuNPs. Assembly of AuNPs tethered by short‐chain ligand can result in oriented face‐centered cubic (fcc) superlattice, whereas AuNPs tethered by long‐chain ligand can assemble into an oriented body‐centered tetragonal (bct) superlattice structure. Interestingly, in situ SAXS study shows that for the sample of bct superlattice structure, a transformation from fcc to bct superlattice upon solvent evaporation is observed, which strongly depends on chain length of ligands. This work provides a useful guide for polymer‐tethered AuNPs to prepare orientation colloidal crystals.

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Metastable Self‐Assembly of Theta‐Shaped Colloids and Twinning of Their Crystal Phases

Cited by 8 publications

References 55 publications

Depletion attraction in colloidal and bacterial systems

Depletion attraction in colloidal and bacterial systems

A Robust Strategy for Precise Fabrication of Rigid–Flexible Coupling Dendrimers toward Self-Coordinated Hierarchical Assembly

Fabrication of Oriented Colloidal Crystals from Capillary Assembly of Polymer‐Tethered Gold Nanoparticles

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