Well-Ordered Inorganic Nanoparticle Arrays Directed by Block Copolymer Nanosheets

Yan, Nan; Liu, Xuejie; Zhu, Jintao; Zhu, Yutian; Jiang, Wei

doi:10.1021/acsnano.9b00940

Cited by 98 publications

(88 citation statements)

References 55 publications

(69 reference statements)

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“…[ 11b ] In addition, Zhu and co‐workers demonstrated the controlled distribution of Au NPs on BCP particles by changing the size of the NPs as well as their ligand compositions. [ 11h,12 ] However, most examples report the incorporation of small NPs within BCPs with large domain sizes. [ 11b,h,12,13 ] This typically yields broad NP spatial distributions within the BCP structure, which thereby produces hybrid particles with poorly defined optical properties.…”

Section: Introductionmentioning

confidence: 99%

“…[ 11h,12 ] However, most examples report the incorporation of small NPs within BCPs with large domain sizes. [ 11b,h,12,13 ] This typically yields broad NP spatial distributions within the BCP structure, which thereby produces hybrid particles with poorly defined optical properties. Furthermore, BCPs with high molecular weights create long interparticle distances between NPs, restricting their use in NRET applications.…”

Section: Introductionmentioning

confidence: 99%

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Fluorescence Switchable Block Copolymer Particles with Doubly Alternate‐Layered Nanoparticle Arrays

Kim

et al. 2021

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The precise self‐assembly of block copolymers (BCPs) and inorganic nanoparticles (NPs) under 3D confinement offers microparticles with programmable nanostructures and functionalities. Here, fluorescence‐switchable hybrid microspheres are developed by forming doubly alternating arrays of Au NPs and CdSe/ZnS quantum dots (QDs) within polystyrene‐block‐poly(4‐vinylpyridine) (PS‐b‐P4VP) BCP domains. These doubly alternating arrays afford controlled nonradiative energy transfer (NRET) between the QDs and Au NPs that is dependent on the layer‐to‐layer distance. Solvent‐selective swelling of the hybrid particles tunes the distance between layers, modulating their NRET behavior and affording switchable fluorescence. The particle fluorescence is “OFF” in water through strong NRET from the QDs to Au NPs, but is “ON” in alcohols due to the increased distance between the Au NP and QD arrays in the swollen P4VP domains. The experimentally observed NRET intensity as a function of interparticle distance shows larger quenching efficiencies than those theoretically predicted due to the enhanced quenching within a 3D‐confined system. Finally, the robust and reversible fluorescence switching of the hybrid particles in different solvents is demonstrated, highlighting their potentials for bioimaging, sensing, and diagnostic applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fluorescence Switchable Block Copolymer Particles with Doubly Alternate‐Layered Nanoparticle Arrays

Kim

et al. 2021

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“…During the past few years, there has been a growing interest in preparing colloidal BCP/inorganic NP particles with internally ordered mesostructures. [ 18,35,36,72 ] Future work is expected to focus more on the development and application of highly functionalized mesostructured colloidal hybrid particles.…”

Section: Discussionmentioning

confidence: 99%

Responsive Colloidal Polymer Particles with Ordered Mesostructures

Deng

et al. 2020

Adv Funct Materials

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Responsive colloidal polymer particles with well‐defined shapes and ordered internal mesostructures are attracting increasing attention because of their potential applications in sensors, catalysis, nano‐drug carriers, color pigments, and others. Recently, 3D confined assembly of block copolymers in emulsion droplets has emerged as a promising method for fabrication of colloidal polymer particles with controllable shapes and internal structures. In this paper, the recent advances in engineering anisotropically shaped and internally ordered colloidal polymer particles are summarized, followed by highlighting their stimuli‐responsiveness and emerging applications. In the last section, the current challenges and future opportunities in this fast growing research field are discussed.

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“…[65] In the form of nanocomposites or by using them as a ligand, they can also be used to direct the selfassembly of NPs. [66,67] One convenient method to embed NPs into layered polymer shells is layer-by-layer assembly. [68] In this way, the interparticle distance can be tuned by the number of polymer layers.…”

Section: Ligands For Self-assemblymentioning

confidence: 99%

Recent Notable Approaches to Study Self‐Assembly of Nanoparticles with X‐Ray Scattering and Electron Microscopy

Schulz

Lokteva

Parak

et al. 2021

Part & Part Syst Charact

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several issues far from being resolved: for many systems long-range periodic order is not routinely achieved, reproducibility is often not optimal and truly emergent and new properties arising from the supercrystal formation could be demonstrated for just a few systems. [3][4][5][6][7] From the materials science perspective there is no established figure of merit or common set of parameters allowing to quantify "quality" of NP superlattices and supercrystals. In lieu of such standard procedures, terms as well-ordered, crystalline order, quasicrystalline, etc., are usually used in literature. However, there exist no commonly accepted definitions of what qualifies, e.g., as "well-ordered."In this review, we want to highlight some recent experimental developments and new approaches to study self-assembly of NPs or structure formation of NP supercrystals and their final structure. We focus on NP, the broad field of photonic materials prepared by self-assembly of larger colloidal particles is not covered herein. [8][9][10] The introduction of the basic concepts of NP self-assembly will be kept short and should be considered as an overview, for more background and details excellent comprehensive reviews are available. [2,11] We will then briefly address and discuss the expectations associated with self-assembled materials, especially the proposed emergence of new properties directly related to order. In the second part of the review, we will present recent innovative approaches for the investigation of self-assembly and self-assembled structures that go beyond the standard characterization. We focus mainly on structure and structure formation and less on properties, so most of the studies are based on scattering and electron microscopy. Figure 1 provides an overview roughly following this outline. Self-Assembly of NanoparticlesSelf-assembly is a broad term and occurs on all scales from atoms, ions, and molecules to galaxies, as pointed out by Whitesides and Grzybowski. [12] It can be defined as the autonomous organization of multiple discrete components into ordered structures, driven by energetics or entropy or both. [2,13] In nature, countless examples of highly complex and functional structures resulting from self-assembly can be found, Self-assembly of nanoparticles (NPs) has evolved into a powerful tool for the synthesis of superstructures with tailored properties. The quality, diversity, and complexity of synthesized structures are continuously improving and fascinating new collective properties are demonstrated. At the same time, the rapid development of electron microscopy and synchrotron sources for X-rays has enabled new exciting experimental approaches to study structure and structure formation in the context of NP self-assembly. In this review, some recent studies and what can be learned from them are highlighted and discussed. It is started with a general introduction covering important concepts, experimental approaches, commonly obtained structures, the ideas of artificial atoms, and emerging properties a...

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Well-Ordered Inorganic Nanoparticle Arrays Directed by Block Copolymer Nanosheets

Cited by 98 publications

References 55 publications

Fluorescence Switchable Block Copolymer Particles with Doubly Alternate‐Layered Nanoparticle Arrays

Fluorescence Switchable Block Copolymer Particles with Doubly Alternate‐Layered Nanoparticle Arrays

Responsive Colloidal Polymer Particles with Ordered Mesostructures

Recent Notable Approaches to Study Self‐Assembly of Nanoparticles with X‐Ray Scattering and Electron Microscopy

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