Fabrication of Functional Nanofibers Through Post‐Nanoparticle Functionalization

Jeoung, Eunhee; Yeh, Yi‐Cheun; Nelson, Tyler; Kushida, Takashi; Wang, Lisheng; Mout, Rubul; Li, Xiaoning; Saha, Krishnendu; Gupta, Akash; Tonga, Gülen Yesilbag; Lannutti, John J.; Rotello, Vincent M.

doi:10.1002/marc.201400744

Cited by 7 publications

(7 citation statements)

References 45 publications

(59 reference statements)

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“…The thiol groups on the surface of Au@SiO 2 –MTS NPs will perform as coupling anchors for the surface-initiated thiol–ene click reaction for the introduction of aniline moieties. − The absorbance of amphiphilic poly(vinylpyrrolidone) (PVP) stabilizers onto Au surfaces provides sufficient affinity for silica coatings on the single Au core. The respective TEM images of the so-obtained Au@SiO 2 –MTS NPs with two distinctive SiO 2 –MTS shell thicknesses of about 19 and 24 nm are shown in Figure b,c, respectively.…”

Section: Resultsmentioning

confidence: 99%

Yolk–Shell Nanocomposites of a Gold Nanocore Encapsulated in an Electroactive Polyaniline Shell for Catalytic Aerobic Oxidation

2016

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Noble metal nanoparticles (NPs) have been widely applied in nanocatalysis owing to the benefits associated with their miniature size. However, improving their stability and reusability during catalytic applications still remains a great challenge. To this end, monodispersed gold@void@polyaniline yolk–shell nanocomposites (Au@void@PANI YSNs) were synthesized using bottom-up template-assisted methods. Au@SiO 2 NPs, prepared from a modified sol–gel process, were used as templates for the thiol–ene click reaction with 4-vinylaniline (VAn) to immobilize the aniline moieties, which later performed as the initiation sites for the oxidative copolymerization of aniline from the outer surface of the Au@SiO 2 –VAn NPs with an electroactive PANI shell (Au@SiO 2 @PANI NPs). The silica layer sandwiched between the Au core and PANI shell was selectively removed by aqueous hydrofluoric acid to produce Au@void@PANI YSNs with a movable Au core. The electroactive PANI shell not only serves as a physical barrier that prevents the self-association of Au cores and provides a vacant cavity where chemical transformations take place on the Au cores in a controlled manner but also improves the activity and stability of Au cores due to the electrons delocalization and transfer from the Au d orbitals of the nanocores to the π-conjugated ligands of the PANI shell, as proved by the X-ray photoelectron spectroscopy results. The as-synthesized YSNs were found to perform as flexible and reusable heterogeneous catalysts with high catalytic efficiency for the aerobic oxidation of alcohol in aqueous solution. One may find the present study to be a general and effective way to fabricate monodispersed hollow nanomaterials in a controlled and green manner.

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Section: Resultsmentioning

confidence: 99%

Yolk–Shell Nanocomposites of a Gold Nanocore Encapsulated in an Electroactive Polyaniline Shell for Catalytic Aerobic Oxidation

2016

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“…In recent years, there are increasing interests to use the polymer‐coated Au nanoparticles which were most widely studied, in order to stabilize, surface‐functionalize the obtained AuNPs with monodispersity for suitable engineering, imaging, or biomedical utilizations . These typical polymers include poly(ethylene glycol), poly(ethylene imine), heparin‐ or hyaluronic acid‐modified polymers, or some other biocompatible species, with the purpose to enhance the stability, payload, or biocompatibility of AuNPs, and to increase the time of systemic circulation .…”

Section: Approaches To the Synthesis Of Polymer–aunp Hybridsmentioning

confidence: 99%

Recent Progress in Macromolecule‐Anchored Hybrid Gold Nanomaterials for Biomedical Applications

Luo

et al. 2018

Macromol. Rapid Commun.

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Gold nanoparticles (AuNPs), with elegant thermal, optical, or chemical properties due to quantum size effects, may serve as unique species for therapeutic or diagnostic applications. It is worth mentioning that their small size also results in high surface activity, leading to significantly impaired stability, which greatly hinders their biomedical utilizations. To overcome this problem, various types of macromolecular materials are utilized to anchor AuNPs so as to achieve advanced synergistic effect by dispersing, protecting, and stabilizing the AuNPs in polymeric-Au hybrid self-assemblies. In this review, the most recent development of polymer-AuNP hybrid systems, including AuNPs@polymeric nanoparticles, AuNPs@polymeric micelle, AuNPs@polymeric film, and AuNPs@polymeric hydrogel are discussed with respect to their different synthetic strategies. These sophisticated materials with diverse functions, oriented toward biomedical applications, are further summarized into several active domains in the areas of drug delivery, gene delivery, photothermal therapy, antibacterials, bioimaging, etc. Finally, the possible approaches for future design of multifunctional polymer-AuNP hybrids by combining hybrid chemistry with biological interface science are proposed.

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“…Engineering the interactions of surfaces with the surrounding environment is crucial to the development of functional materials. − For example, controlling the interface between materials and biological entities enables the design of smart and responsive biomaterials. − Surface properties can either result directly from the bulk material surface or can be tailored by applying coatings that impart specific properties and functionalities. , These surface coatings provide a versatile platform for modulating the interface between the bulk material and the surrounding environment, consequently defining and enhancing the utility of these materials. , …”

Section: Introductionmentioning

confidence: 99%

“…7,8 These surface coatings provide a versatile platform for modulating the interface between the bulk material and the surrounding environment, consequently defining and enhancing the utility of these materials. 9,10 Small-molecule monolayers have been widely employed for surface modification. 11 Although molecular grafting on surfaces is straightforward, this type of coating can face challenges with coverage efficiency, 12 stability 13 and characterization (particularly for more complex surfaces).…”

Section: ■ Introductionmentioning

confidence: 99%

Tailored Functional Surfaces Using Nanoparticle and Protein “Nanobrick” Coatings

2018

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Surface properties are an essential feature in a wide range of functional materials. In this article, we summarize strategies developed in our group that employ nanoparticles and proteins as nanobricks to create thin-film coatings on surfaces. These coatings contain tailorable surface functionality based on the properties of the predesigned nanobricks, parlaying both the chemical and structural features of the precursor particles and proteins. This strategy is versatile, providing the rapid generation of both uniform and patterned coatings that provide "plug-andplay" customizable surfaces for materials and biomedical applications.

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Fabrication of Functional Nanofibers Through Post‐Nanoparticle Functionalization

Cited by 7 publications

References 45 publications

Yolk–Shell Nanocomposites of a Gold Nanocore Encapsulated in an Electroactive Polyaniline Shell for Catalytic Aerobic Oxidation

Yolk–Shell Nanocomposites of a Gold Nanocore Encapsulated in an Electroactive Polyaniline Shell for Catalytic Aerobic Oxidation

Recent Progress in Macromolecule‐Anchored Hybrid Gold Nanomaterials for Biomedical Applications

Tailored Functional Surfaces Using Nanoparticle and Protein “Nanobrick” Coatings

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