Sonochemical Synthesis of Magnetic Janus Nanoparticles

Teo, Boon Mian; Suh, Su Kyung; Hatton, T. Alan; Ashokkumar, Muthupandian; Grieser, Franz

doi:10.1021/la104284v

Cited by 68 publications

(65 citation statements)

References 28 publications

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“…As shown in the EDX spectra obtained from isolated area of composite, there is no signal from the Fe or Si element in the neat region of the composite but relatively strong peaks from Si and Fe elements from the darker counterpart (inset of Figure 4). This is different from the results from Hatton and co-workers 35 regarding sonochemical synthesis, possibly because of different phase-separation behaviors. In this study, it was found that phase separation could be controlled by the addition of NH 4 OH to trigger the hydrolysis and polycondensation of TEOS with MPS molecules leading to the formation of a silica chain.…”

Section: Janus Fe 3 O 4 @Silica/polystyrene Composites Via Phase Sepacontrasting

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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Section: Janus Fe 3 O 4 @Silica/polystyrene Composites Via Phase Sepacontrasting

confidence: 99%

Janus Nanostructures and Their Bio-medical Applications

Wang¹,

Wang²

2014

Bio-Inspired Nanomaterials and Applications

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“…The most complex latex products made by ultrasound-induced-emulsion polymerization are nano-sized "Janus" particles, i.e., particles that are one-half hydrophilic and the other half hydrophobic [22]. Teo et al developed a sonochemical method whereby a silica particle and a polymer particle were conjoined.…”

Section: Polymer Latexmentioning

confidence: 99%

Ultrasound in Heterogeneous Systems and Applications in Food Processing

Grieser

2015

Sonochemistry and the Acoustic Bubble

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“…20,21 A number of reviews have been focused on these fabrication methods, their characteristic selfassembly and applications. 8,20,[28][29][30][31][32][33][34][35][36][37] Particularly, magnetic Janus particles have received remarkable attentions due to several advantages over other types of interaction; [28][29][30][31][32][33][34][35][36][37][38][39] the magnetic interaction is generally not influenced by surface chemistry of particles and characteristics of solvent such as pH, ionic concentration and its dielectric constant as in electric interaction. For example, not only orientation and motion of a single particle can be controlled but also field-induced suprastructures can be assembled in a reversible way.…”

Section: Introductionmentioning

confidence: 99%

One-step preparation of magnetic Janus particles using controlled phase separation of polymer blends and nanoparticles

Jeong

Park

et al. 2013

RSC Adv.

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We present a simple method with the aid of a microfluidic droplet-generation technique to fabricate magnetic Janus particles by utilizing a solvent evaporation-induced phase separation and preferential partitioning of magnetic nanoparticles in the polymer blends. Non-aqueous emulsion droplets of the polymer blends and nanoparticles solution are produced to become Janus particles after the evaporation of the solvent. The stabilizing polymer of the nanoparticles, which is compatible only with one of the polymer blends to be phase-separated, plays a key role in the anisotropic positioning of the nanoparticles in the Janus particles. Using this phase separation-based method and microfluidics, excellent control over the size, size distribution, and morphology of the particles is achieved. Especially, we could control the morphology of the Janus particles easily by varying the volume ratio of the polymers. However, with an analysis of the shapes of resulting Janus particles, we found that non-equilibrium aspects of the evaporation-induced phase separation play a major role in determining the particle morphology. We expect that the versatility of this method in the choice of polymer blends and functional nanoparticles will enable the fabrication of colloids with various functionality and desired morphology.3 Electronic supplementary information (ESI) available: Analysis of particle shapes based on thermal equilibrium assumption, including Fig. S1 and S2. See

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Sonochemical Synthesis of Magnetic Janus Nanoparticles

Cited by 68 publications

References 28 publications

Janus Nanostructures and Their Bio-medical Applications

Janus Nanostructures and Their Bio-medical Applications

Ultrasound in Heterogeneous Systems and Applications in Food Processing

One-step preparation of magnetic Janus particles using controlled phase separation of polymer blends and nanoparticles

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