Facile synthesis of size-tunable superparamagnetic/polymeric core/shell nanoparticles by metal-free atom transfer radical polymerization at ambient temperature

Wang, Xiaobing; You, Ning; Lan, Fuqiang; Fu, Peizhen; Cui, Zhe; Pang, Xinchang; Zhao, Qian

doi:10.1039/c6ra26290b

Cited by 10 publications

(7 citation statements)

References 29 publications

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“…The metal-free ATRP initiators with bi-functional groups 7 were synthesized by modifying the hydroxyl group in 12-hydroxydodecanoic acid by 2-bromophenylacetyl bromide (Fig. S5).…”

Section: Methodsmentioning

confidence: 99%

“…Besides small molecule ligands, functional polymeric coatings as shell on core nanoparticle surfaces are also widely used to prepare interfaces with special properties and characteristics to make them to interact with specific environment 5,6 . For example, the coating shell can be utilized to reduce undesirable interactions or enhance desired interactions 7 . Different from inorganic shell growing from the surface of nanoparticles, various different approaches have been utilized for the preparation of functional polymer shells, such as in situ polymerization from the functional surface of nanoparticles 8 , direct attaching functional polymer ligands onto surfaces of core nanoparticles 2,9 , layer-by-layer functional polymer deposition 10,11 , and in situ fabrication of inorganic nanoparticles using functional polymeric chains as ligands.…”

Section: Introductionmentioning

confidence: 99%

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Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light

You

Zhang

Liang

et al. 2019

Sci Rep

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An unconventional but facile approach to prepare size-tunable core/shell ferroelectric/polymeric nanoparticles with uniform distribution is achieved by metal-free atom transfer radical polymerization (ATRP) driven by visible light under ambient temperature based on novel hyperbranched aromatic polyamides (HBPA) as a functional matrix. Cubic BaTiO3/HBPA nanocomposites can be prepared by in-situ polycondensation process with precursors (barium hydroxide (Ba(OH)2) and titanium(IV) tetraisopropoxide (TTIP)) of ferroelectric BaTiO3 nanocrystals, because precursors can be selectively loaded into the domain containing the benzimidazole rings. At 1200 °C, the aromatic polyamide coating of cubic BaTiO3 nanoparticles are carbonized to form carbon layer in the inert environment, which prevents regular nanoparticles from gathering. In addition, cubic BaTiO3 nanoparticles are simultaneously transformed into tetragonal BaTiO3 nanocrystals after high temperature calcination (1200 °C). The outer carbon shell of tetragonal BaTiO3 nanoparticles is removed via 500 °C calcination in air. Bi-functional ligand can modify the surface of tetragonal BaTiO3 nanoparticles. PMMA polymeric chains are growing from the initiating sites of ferroelectric BaTiO3 nanocrystal surface via the metal-free ATRP technique to obtain core/shell ferroelectric BaTiO3/PMMA hybrid nanoparticles. Changing the molar ratio between benzimidazole ring units and precursors can tune the size of ferroelectric BaTiO3 nanoparticles in the process of polycondensation, and the thickness of polymeric shell can be tailored by changing the white LED irradiation time in the organocatalyzed ATRP process. The dielectric properties of core/shell BaTiO3/PMMA hybrid nanoparticles can be also tuned by adjusting the dimension of BaTiO3 core and the molecular weight of PMMA shell.

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“…The metal-free ATRP initiators with bi-functional groups 7 were synthesized by modifying the hydroxyl group in 12-hydroxydodecanoic acid by 2-bromophenylacetyl bromide (Fig. S5).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light

You

Zhang

Liang

et al. 2019

Sci Rep

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“…33 Starting from the bifunctional ligands with ATRP activity and iron precursors, PMMA-ligated Fe 3 O 4 NPs were obtained by ATRP of MMA on the surface of Fe 3 O 4 NPs. 152 There was no hysteresis loop for PMMA-ligated Fe 3 O 4 NPs of different sizes, suggesting their superparamagnetic property. Accordingly, the saturation magnetization increased with increasing NP size.…”

Section: Size- Architecture- and Surface-chemistry-dependent Properti...mentioning

confidence: 96%

“…For example, different sizes of PS-ligated Fe 3 O 4 NPs (6, 10, and 16 nm) prepared from the nanoreactor of β-CD- g -[(PAA- b -PS] were superparamagnetic at 300 K, and the saturation magnetization increased accordingly with increasing Fe 3 O 4 NP size . Starting from the bifunctional ligands with ATRP activity and iron precursors, PMMA-ligated Fe 3 O 4 NPs were obtained by ATRP of MMA on the surface of Fe 3 O 4 NPs . There was no hysteresis loop for PMMA-ligated Fe 3 O 4 NPs of different sizes, suggesting their superparamagnetic property.…”

Section: Size- Architecture- and Surface-chemistry-dependent Properti...mentioning

confidence: 99%

Polymer-Ligated Nanocrystals Enabled by Nonlinear Block Copolymer Nanoreactors: Synthesis, Properties, and Applications

et al. 2020

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The past several decades have witnessed substantial advances in synthesis and self-assembly of inorganic nanocrystals (NCs) due largely to their size-and shapedependent properties for use in optics, optoelectronics, catalysis, energy conversion and storage, nanotechnology, and biomedical applications. Among various routes to NCs, the nonlinear block copolymer (BCP) nanoreactor technique has recently emerged as a general yet robust strategy for crafting a rich diversity of NCs of interest with precisely controlled dimensions, compositions, architectures, and surface chemistry. It is notable that nonlinear BCPs are unimolecular micelles, where each block copolymer arm of nonlinear BCP is covalently connected to a central core or polymer backbone. As such, their structures are static and stable, representing a class of functional polymers with complex architecture for directing the synthesis of NCs. In this review, recent progress in synthesizing NCs by capitalizing on two sets of nonlinear BCPs as nanoreactors are discussed. They are star-shaped BCPs for producing 0D spherical nanoparticles, including plain, hollow, and core−shell nanoparticles, and bottlebrush-like BCPs for creating 1D plain and core/shell nanorods (and nanowires) as well as nanotubes. As the surface of these NCs is intimately tethered with the outer blocks of nonlinear BCPs used, they can thus be regarded as polymer-ligated NCs (i.e., hairy NCs). First, the rational design and synthesis of nonlinear BCPs via controlled/living radical polymerizations is introduced. Subsequently, their use as the NC-directing nanoreactors to yield monodisperse nanoparticles and nanorods with judiciously engineered dimensions, compositions, and surface chemistry is examined. Afterward, the intriguing properties of such polymer-ligated NCs, which are found to depend sensitively on their sizes, architectures, and functionalities of surface polymer hairs, are highlighted. Some practical applications of these polymer-ligated NCs for energy conversion and storage and drug delivery are then discussed. Finally, challenges and opportunities in this rapidly evolving field are presented.

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“…Zhao and co‐workers discovered a novel strategy for the fabrication of size‐tunable/polymeric core–shell nanoparticles using PTH photocatalyst. In this approach, hydroxyl group of 12‐hydroxydodecanoic acid was modified by attachment with 2‐bromophenacetyl bromide in order to synthesize a bifunctional ligand . The ligand was then reacted with iron(III) oxide to generate precursors for Fe 3 O 4 nanoparticles.…”

Section: Applications Of Atrp‐mediated Photopolymerizationmentioning

confidence: 99%

Photocontrolled Living Polymerization Systems with Reversible Deactivations through Electron and Energy Transfer

Shanmugam

Boyer

2017

Macromol. Rapid Commun.

138

108

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to fold into secondary, tertiary, and quaternary structures with respect to their functions in the cell. [1] Regulation of protein synthesis by ribosomes is carried out with precise spatial, temporal and sequence control that is provided through protein-protein and protein-RNA interactions. Mimicking cellular regulation in terms of spatial, temporal, and sequence control for the synthesis of synthetic polymers is an arduous task in polymer chemistry. However, the implication of this technology is indisputable considering that the current billion-dollar polymer industry is geared toward engineering materials such as coatings, [2] thermosets, [3] foams, [4] dental adhesives, [5] microelectronics, [6] laser direct imaging, [7] stereolithography for 3D printing, [8] and holographic recording, [9] based on irreversible temporal control of initiation. [1a,10] Spatial, temporal, and sequence control for polymer

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Facile synthesis of size-tunable superparamagnetic/polymeric core/shell nanoparticles by metal-free atom transfer radical polymerization at ambient temperature

Abstract: Size-tunable superparamagnetic/polymeric core/shell nanoparticles with uniform distribution was fabricated based on metal-free atom transfer radical polymerization at ambient temperature.

Cited by 10 publications

References 29 publications

Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light

Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light

Polymer-Ligated Nanocrystals Enabled by Nonlinear Block Copolymer Nanoreactors: Synthesis, Properties, and Applications

Photocontrolled Living Polymerization Systems with Reversible Deactivations through Electron and Energy Transfer

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