Facile synthesis of asymmetric Ag–organosilica hybrid nanoparticles with tunable morphologies and optical properties

Sun, Yangyi; Chen, Min; Wang, Zengbo; Wu, Limin

doi:10.1039/c4cc02137a

Cited by 16 publications

(12 citation statements)

References 37 publications

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“…25,27,28 In addition, from both curves, the -C-O-Cstretching vibration at 1103 cm À1 from mPEG block were observed. 39 Based on these results, it is concluded that the ester bond still existed and the Ag NWs were wrapped with the PVP chain with mPEG tails on the surface.…”

Section: Synthesis and Characterization Of Ag Nwsmentioning

confidence: 91%

A novel self-seeding polyol synthesis of Ag nanowires using mPEG-b-PVP diblock copolymer

et al. 2014

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Section: Synthesis and Characterization Of Ag Nwsmentioning

confidence: 91%

A novel self-seeding polyol synthesis of Ag nanowires using mPEG-b-PVP diblock copolymer

et al. 2014

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“…In comparison with the other noble metals, silver has gained less interest in the fabrication of Janus particles. Some silver-gold bimetal or silver-sillica Janus nanoparticles have been prepare by depositing growth on the metal seeds [ 27 , 28 , 29 , 30 ]. Chen et al [ 27 ] had compared a Janus Au@Ag nanoparitlces to their Au@Ag and Ag@Au core-shell counterparts, and found that the Janus nanoparticles exhibited enhanced electrocatalytic activity in oxygen reduction reactions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Comparative Biological Properties of Ag-PEG Nanoparticles with Tunable Morphologies from Janus to Multi-Core Shell Structure

Liu

et al. 2018

Materials

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Silver nanoparticles synthesized with polymers as coating agents is an effective method to overcome their poor stability and aggregation in solution. Silver-polyethylene glycol (Ag-PEG) nanoparticles were synthesized with the thiol-functionalized polyethylene glycol (SH-PEA) as the coating, reducing and stabilizing agent. The UV irradiation time, polymer and silver nitrate concentration for the synthesis were investigated. The concentration of silver nitrate had significant effect on the morphology of Ag-PEG nanoparticles. When increasing the concentration of silver nitrate, SEM and TEM images showed that Ag-PEG nanoparticles changed from Janus to multi-core shell structure. Meanwhile, pure silver particles in the two hybrid nanoparticles presented spherical shape and had the similar size of 15 nm. The antibacterial activities and cytotoxicity of the two structural Ag-PEG nanoparticles were investigated to understand colloid morphology effect on the properties of AgNPs. The results of antibacterial activities showed that the two structural Ag-PEG nanoparticles exhibited strong antibacterial activities against Staphylococcus aureus, Escherichia coli and Bacillus subtilis. The Janus nanoparticles had larger minimal inhibitory concentration (MIC) and minimum bacterial concentration (MBC) values than the multi-core shell counterparts. The results of cytotoxicity showed the Janus Ag-PEG nanoparticles had lower toxicity than the multi-core shell nanoparticles.

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“…Recently, Janus nanostructures have emerged as a new family of colloidal structured materials, and attracted the attention of many researchers owing to their potential applications in many fields such as drug delivery, imaging probes, electronic devices, and catalysis . Janus nanostructures have many advantages compared with other complex nanoparticles, such as combing individual components together, even incompatible acidic and basic groups, and retaining their intrinsic properties . Now, many methods for preparing Janus nanostructures have been reported, including one‐step synthesis, surface chemical‐selective modification, self‐assembly, and others .…”

Section: Methodsmentioning

confidence: 99%

Synthesis of Janus Mesoporous Silica Nanostructures with Organic–Inorganic Hybrid Components through a Sprout‐Like Growth Method

Wang

Guan

et al. 2015

ChemNanoMat

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In this paper,w eh ave established as imple and generalizable sprout-like growth method for the facile synthesis of Janus mesoporous silica nanostructures with organic-inorganich ybrid components by using periodic mesoporous organosilica (PMO)n anoparticles as seeds with mesoporous SiO 2 as branches growing on the PMO surface. The morphology of Janus nanostructures with different lengths and numbers of SiO 2 branches can be easily controlled by varying the tetraethoxysilane concentration in the synthesis system.T he Janus nanostructures are also easily modified with different SO 3 Ha nd NH 2 groups on the SiO 2 branches and PMO cores, respectively,and exhibit excellent catalytic performance in the deacetalizationHenry cascade reaction.Recently,J anus nanostructures have emerged as an ew family of colloidal structured materials, [1] and attracted the attention of many researchers owing to their potential applicationsi n many fields such as drug delivery, [2] imagingp robes, [3] electronic devices, [4] andc atalysis. [5] Janus nanostructures have many advantages compared with other complex nanoparticles, [6] such as combing individual components together, [6a] even incompatible acidic and basic groups, and retaining their intrinsic properties.[6d] Now,m any methods for preparing Janus nanostructures have been reported, including one-step synthesis, [7] surface chemical-selective modification, [8] self-assembly, [9] and others.[10] Althoughm any effortsh aveb een made to fabricate Janus nanostructures, [1] the effective methods for synthesis of Janus nanostructures are still limited, [6c, 11] and the prepared Janus nanoparticles are typically singlecomponent.Mesoporouss ilica nanomaterials have received considerable attention because of their potential applications in catalysis, separation, drug delivery,a nd so forth, and mesoporous silica nanomaterials have many advantages over solid materials including large surface area and pore volume, stability,a nd the option to functionalize their outer or inner surfaces.[12] Av ariety of mesoporous silica nanomaterials have been successfully synthesized, including SBA-15t ype nanoparticles, [12a] MCM-41 type nanoparticles, [13] core-shell [12c] or yolk-shell [14] structured mesoporouss ilica nanospheres, and periodic mesoporous organosilica (PMO)n anoparticles.[15] However,t he traditional synthesis methods form esoporous silica nanomaterials often rely on one-pot sol-gelp rocesses or template methods, [12b, 15] and most products of these methods are analogous sphereso r single-component materials. The organic and inorganic hybrid nanomaterials based on mesoporouss ilica have many advantages over the traditional single-component nanomaterials, including good stability,t ailoreds urfacep olarities, and even good biocompatibility for different applications.[16] Thus, it remains ag reat challenge to develop af acile and scalable approach for preparing Janus mesoporouss ilica nanostructures with organic-inorganic hybrid components.Herein, we developasimpl...

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Facile synthesis of asymmetric Ag–organosilica hybrid nanoparticles with tunable morphologies and optical properties

Abstract: This study reports a simple and novel wet-chemical method for synthesizing asymmetric Ag-organosilica hybrid nanoparticles with finely-tuned morphologies and optical properties.

Cited by 16 publications

References 37 publications

A novel self-seeding polyol synthesis of Ag nanowires using mPEG-b-PVP diblock copolymer

A novel self-seeding polyol synthesis of Ag nanowires using mPEG-b-PVP diblock copolymer

Synthesis and Comparative Biological Properties of Ag-PEG Nanoparticles with Tunable Morphologies from Janus to Multi-Core Shell Structure

Synthesis of Janus Mesoporous Silica Nanostructures with Organic–Inorganic Hybrid Components through a Sprout‐Like Growth Method

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