What is next in polymer-grafted plasmonic nanoparticles?

Duan, Hanyi; Yang, Yiqun; Zhang, Yan; Yi, Changfeng; Nie, Zhihong; He, Jie

doi:10.1016/j.giant.2020.100033

Cited by 30 publications

(23 citation statements)

References 80 publications

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“…In the past century, tremendous efforts have been devoted to pursuing precise control over primary chemical structures including, but not limited to, chain length, topology, sequence, and regio-/stereochemistry of synthetic polymers. , Achieving such a degree of control on granular/colloidal monomers represents a formidable challenge. The lack of effective modification approach and facile coupling strategy results in uncontrolled conjugation and unstable connection between neighboring particles during the process of “polymerization” . As a result, inevitable defects severely impede the systematic studies and further applications.…”

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confidence: 99%

“…The lack of effective modification approach and facile coupling strategy results in uncontrolled conjugation and unstable connection between neighboring particles during the process of "polymerization". 17 As a result, inevitable defects severely impede the systematic studies and further applications. To circumvent these problems, we recently demonstrated a robust and efficient iterative exponential growth (IEG) approach to prepare discrete giant polymeric chains with uniform length using polyhedral oligomeric silsesquioxane (POSS, a precisely defined rigid nanoparticle with a diameter of 1−3 nm) as repeat units, providing an ideal model system to unravel the fundamental principles at a larger length scale.…”

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confidence: 99%

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Precise Amphiphilic Giant Polymeric Chain Based on Nanosized Monomers with Exact Regio-Configuration

et al. 2021

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Polymeric chains made of "giant" monomers at a larger length scale provide intriguing insights into the fundamental principles of polymer science. In this study, we modularly prepared a library of discrete amphiphilic polymeric chains using molecular nanoparticles as repeat units, with exact control of composition, chain length, surface property, and regio-configuration. These giant polymeric chains selfassembled into a rich collection of highly ordered phases. The precise chemical structure and uniform chain length eliminate all the inherent molecular "defects", while the nanosized monomer amplifies minute structural differences, providing an ideal platform for a systematic scrutiny of the self-assembly behaviors at a larger length scale. The compositional and regioconfigurational contribution was carefully studied. The regio-regularity is found to have a direct and profound impact on the chain conformation, leading to a distinct molecular packing scheme and therefore shifting the phase boundaries. With increasing the length of the linker, the regio-constraint gradually diminishes, and the neighboring particles would eventually be decoupled.

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Precise Amphiphilic Giant Polymeric Chain Based on Nanosized Monomers with Exact Regio-Configuration

et al. 2021

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“…Polymer-grafted plasmonic nanoparticles (PGPNs) consisting of a plasmonic nanoparticle (NP) core chemically grafted with polymer tethers have received continuous attention as part of functional polymer nanocomposites over the past decade . Polymers as surface ligands that dominate the interparticle interaction direct the organization of plasmonic NPs macroscopically to control their ensemble properties, such as tunable plasmonic properties of PGPNs. , For example, PGPNs with amphiphilic mixed polymer tethers or block copolymers (BCPs) can assemble into abundant nanostructures with promising applications in nanomedicine, sensing, and catalysis .…”

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confidence: 99%

Symmetry-Broken Patches on Gold Nanoparticles through Deficient Ligand Exchange

et al. 2021

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Symmetry-broken nanoparticles (NPs) are important building blocks with directional interparticle interaction as a key to access the precise organization of NPs macroscopically. We report a facile, one-pot synthetic approach to prepare high-quality symmetry-broken plasmonic gold NPs (AuNPs). Symmetry-broken patterning is achieved through deficient ligand exchange of isotropic AuNPs with thiol-terminated polystyrene (PS-SH) in the presence of an amphiphilic polymer surfactant. The concentration of PS-SH plays a dominant role in tuning surface patterning and coverage of AuNPs. The formation of asymmetric surface patches arises from the interplay between the conformational entropy of polymer ligands and the interfacial energy between polymer-grafted AuNPs and the solvent. Our method illustrates new paradises to design asymmetric NPs with directional interparticle interactions to access the precise organization of NPs.

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“…[1][2][3] These metal NPs as building blocks provide tremendous opportunities in design of functional materials using bottom-up self-assembly. [4][5][6][7][8][9][10][11][12][13][14] Synthesis favors symmetry to lower the surface energy under given synthetic conditions; 15 however, self-assembly benefits from asymmetry. [16][17][18] Adding asymmetry to NP building blocks has a significant impact on interparticle interactions that guides and potentially programs self-assembly in a specific pathway.…”

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confidence: 99%