Facile one-pot synthesis of yolk–shell superparamagnetic nanocomposites via ternary phase separations

Wang, Yilong; Wang, Fangyingkai; Chen, Bingdi; Xu, Hong; Shi, Donglu

doi:10.1039/c1cc13463a

Cited by 23 publications

(17 citation statements)

References 28 publications

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“…The average size of the Fe 3 O 4 nanoparticles was about 11 nm. After one-pot synthesis process on the basis of the Fe 3 O 4 nanoparticles reported in our previous work [26], a ternary magnetic composite spheres with yolk-shell structure composed of iron oxide/silica hybrid shell and polystyrene core were prepared (as shown in Fig. 2b).…”

Section: Preparation Of Magnetic Hollow Mesoporous Silica Microspheresmentioning

confidence: 99%

“…OAIOs were further purified with ethanol and DI water three times each. With the synthesized OAIOs, the yolk-shell magnetic silica templates nanoparticles were prepared through a one-pot synthesis process combined with a miniemulsion polymerization and solgel reaction according to our previous work [26]. Typically, the water phase, consisting of 40 g of DI water and 0.092 g of SDS, and the oil phase, containing 9 g of St, 0.4 g of Hexadecane, 55 mg of OAIOs and 1 g of TEOS, were prepared under 200 W sonication (KQ-400KDV, Kun Shan Ultrasonic Instruments Co. Ltd.).…”

Section: Preparation Of the Yolk-shell Superparamagnetic Composite Tementioning

confidence: 99%

“…(3) Polymer core of the templates could be simultaneously removed during the calcination to fabricate the mesoporous structure. The yolk-shell composites templates were prepared according to our previous work [26]. A mixture including Styrene monomer, HD, TEOS precursor, OAIOs, and the water phase was miniemulsified to form the miniemulsion droplet systems, in which the monomer polymerization was carried out and phase separations were started.…”

Section: Preparation Of Magnetic Hollow Mesoporous Silica Microspheresmentioning

confidence: 99%

See 2 more Smart Citations

Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

Wang

Tang

Zhang

et al. 2012

Journal of Colloid and Interface Science

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Section: Preparation Of Magnetic Hollow Mesoporous Silica Microspheresmentioning

confidence: 99%

Section: Preparation Of the Yolk-shell Superparamagnetic Composite Tementioning

confidence: 99%

Section: Preparation Of Magnetic Hollow Mesoporous Silica Microspheresmentioning

confidence: 99%

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Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

Wang

Tang

Zhang

et al. 2012

Journal of Colloid and Interface Science

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“…Using the above-mentioned combining process of miniemulsion polymerization and sol-gel reaction, Wang et al 36 prepared yolk-shell magnetic composite structures (YSMCs) containing an Fe 3 O 4 /silica hybrid shell and a polystyrene. It is worth noting that such yolk-shell structure can be obtained via one-pot ternary phase separation of the inorganic and organic components during the reaction for preparation of Janus magnetic composites in the absence of MPS as the coupling agent.…”

Section: Yolk-shell-like Fe 3 O 4 @Silica/polystyrene Composites Via mentioning

confidence: 99%

Janus Nanostructures and Their Bio-medical Applications

Wang¹,

Wang²

2014

Bio-Inspired Nanomaterials and Applications

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Nanotechnology has great potential in bio-medicine, leading to tremendous efforts in gene transfection, drug delivery, cell targeting and hyperthermia. As researchers gain familiarity with homogeneous nanomaterials, more attention is drawn to Janus nanostructure, an emerging new material with two or more distinct properties. With the uniqueness in asymmetry, Janus nanomaterials offer more possibilities for assembling multifunctional carriers. In this chapter, the synthesis of ternary Janus system of silica, Fe 3 O 4 and polystyrene is introduced. A relatively easy method of combining miniemulsion and sol-gel is employed. The reaction mechanism is discussed with controllable morphology obtained. Dual surface functionalities are explored by selectively conjugating targeting group and anti-cancer drug. In vitro drug release profi les indicate a pH-responsive fashion. Cell study proves that the Janus nanocomposites successfully combine targeting and controlled drug release, achieving higher drug effi cacy. Future endeavors will focus on structure novelty as well as fabrication simplifi cation and scaling up. With its potential for higher integration, Janus nanostructures can well-serve as a versatile platform for biomedical applications.Bio-Inspired Nanomaterials and Applications Downloaded from www.worldscientific.com by KAINAN UNIVERSITY on 02/03/15. For personal use only.

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“…[16][17][18][19][20] Although various yolkshell structures with different types of cores and different particle sizes have been successfully prepared, the control of shell thickness of yolk-shell type particles has been less well studies. [21][22][23] Therefore, the investigation of the control of thickness and crystalline structure of yolk-shell type particles is valuable. Here we report the control of shell thickness in yolk-shell particles.…”

Section: -15mentioning

confidence: 99%

Control of the Shell Thickness of TiO₂@SiO₂Particles and Its Surface Functionalization

Ahn¹,

Jung²,

Lee³

et al. 2013

Bulletin of the Korean Chemical Society

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The fabrication of functional hollow particles is of great scientific and technological interest for purposes of applications ranging from drug delivery, coatings, photonic devices, and nanoscale reaction vessels.1-3 Various methods, including approaches such as spray drying, emulsion templating techniques, and self-assembly processes, have been described for the preparation of hollow spheres out of latex, metal, and inorganic materials. 4-11Among the various structures of these particles, the coreshell structure is a powerful platform for controlled release, confined nanocatalysis and optical and electronic applications.12 A hybrid of the core-shell structure, termed the yolk-shell or rattle-type structure, is a special class of coreshell structures with a distinctive core@void@shell configuration which has attracted great interest in recent years. 13-15With the unique properties of movable cores, interstitial hollow spaces, and the functionalization of the shells, yolkshell structures have great potential for application in various fields, including nanoreactors, biomedicine, lithium-ion batteries, and photocatalysis. [16][17][18][19][20] Although various yolkshell structures with different types of cores and different particle sizes have been successfully prepared, the control of shell thickness of yolk-shell type particles has been less well studies.21-23 Therefore, the investigation of the control of thickness and crystalline structure of yolk-shell type particles is valuable. Here we report the control of shell thickness in yolk-shell particles. The crystalline structure of the yolkshell particle has also been characterized by annealing at different temperatures.The route for the preparation of yolk-shell (TiO 2 @SiO 2 ) titanium-silica particles is given in Scheme 1. After being dried in an oven at 50 °C for 2 h, titanium particles can be coated with silica under Stöber conditions. Silica coating of the dried titanium results in TiO 2 @SiO 2 particles. Upon calcination at 600-625 °C for 15-60 min, the greater porosity of the titanium cores of TiO 2 @SiO 2 particles causes them to shrink more than the silica component and gives rise to TiO 2 @SiO 2 particles.A TEM micrograph of the bare titanium particles is given in Figure 1(a) and the TiO 2 @SiO 2 particles, which display the shrinkage that occurred after calcination, are shown in Figure 1(b). We found the size of the particles to be 650-680 nm (5% polydispersity) and the shell thickness to be 100-120 nm, with an inner core of 340-360 nm. The void between the shrunken core and the silica shell was 70-130 nm depending on the particle size and the calcination time.To corroborate that the synthesized particles have SiO 2 layers, an elemental analysis was conducted to identify the presence of Si and SiO 2 in the particles.24 The EDX analysis showed that the TiO2@SiO2 core/shell particles consisted of Ti:Si in the ratio of 41:11% ( Figure S1). Furthermore, FTIR studies were also conducted to determine the presence of specific functional groups and intra and/o...

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Facile one-pot synthesis of yolk–shell superparamagnetic nanocomposites via ternary phase separations

Abstract: Yolk-shell composites with an Fe(3)O(4)/silica hybrid shell and a polymer core are prepared via a facile one-pot and self-template process. Thicknesses of the inorganic shell and interior space of the composites are well controlled by tuning the ternary phase separations.

Cited by 23 publications

References 28 publications

Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

Janus Nanostructures and Their Bio-medical Applications

Control of the Shell Thickness of TiO₂@SiO₂Particles and Its Surface Functionalization

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Facile one-pot synthesis of yolk–shell superparamagnetic nanocomposites via ternary phase separations

Abstract: Yolk-shell composites with an Fe(3)O(4)/silica hybrid shell and a polymer core are prepared via a facile one-pot and self-template process. Thicknesses of the inorganic shell and interior space of the composites are well controlled by tuning the ternary phase separations.

Cited by 23 publications

References 28 publications

Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

Janus Nanostructures and Their Bio-medical Applications

Control of the Shell Thickness of TiO2@SiO2Particles and Its Surface Functionalization

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Product

Resources

About

Control of the Shell Thickness of TiO₂@SiO₂Particles and Its Surface Functionalization