A Research of Stereo-Selective Synthesis of Silica-based Amphiphilic Janus Particles

Abstract Because Janus particles with specific asymmetric nanostructures can be fixed in the oil phase or water respectively, they are more suitable for Pickering emulsion stability. Furthermore, the complete separation of hydrophobic and hydrophobic regions makes adjusting the hydrophobic/hydrophobic region ratio possible by changing the volume ratio. In this study, the preparations of three asymmetric silicon-based amphiphilic Janus nanoparticles are introduced. The methods used are consecutive immobilization, seed emulsion polymerization, and selective encapsulation, respectively. Complete compartmentalization of hydrophilic and hydrophobic domains was realized by anchoring silica with nucleation site, seed emulsion polymerization, or surface charge repulsion. In addition, these nanoparticles can be easily functionalized, bringing new research opportunities to applications in catalysis, adsorption, separation and biomedicine.

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Fluorescent-magnetic Janus particles prepared via seed emulsion polymerization

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2014.03.011 ◽

2014 ◽

Vol 424 ◽

pp. 98-103 ◽

Cited By ~ 20

Author(s):

Chariya Kaewsaneha ◽

Ahmad Bitar ◽

Pramuan Tangboriboonrat ◽

Duangporn Polpanich ◽

Abdelhamid Elaissari

Keyword(s):

Emulsion Polymerization ◽

Janus Particles ◽

Seed Emulsion Polymerization

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Facile fabrication of snowman-like Janus particles with asymmetric fluorescent properties via seeded emulsion polymerization

Colloid & Polymer Science ◽

10.1007/s00396-013-3051-5 ◽

2013 ◽

Vol 291 (12) ◽

pp. 2993-3003 ◽

Cited By ~ 13

Author(s):

Yang Zhang ◽

Hua-Rong Liu ◽

Feng-Wei Wang

Keyword(s):

Emulsion Polymerization ◽

Janus Particles ◽

Seeded Emulsion Polymerization ◽

Fluorescent Properties ◽

Facile Fabrication

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Study on the morphology in composite emulsion particles produced by seed emulsion polymerization

Macromolecular Chemistry and Physics ◽

10.1002/macp.1996.021970808 ◽

1996 ◽

Vol 197 (8) ◽

pp. 2447-2453 ◽

Cited By ~ 1

Author(s):

Zhengping Liu ◽

Fengqi Liu ◽

Zhiqiang Liu ◽

Xinyi Tang

Keyword(s):

Emulsion Polymerization ◽

Seed Emulsion Polymerization

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Synthesis and characterization of porous poly(methacrylic acid-co-triethylene glycol dimethacrylate) by seed emulsion polymerization

Journal of Applied Polymer Science ◽

10.1002/1097-4628(20001107)78:6<1209::aid-app50>3.0.co;2-9 ◽

2000 ◽

Vol 78 (6) ◽

pp. 1209-1215 ◽

Cited By ~ 1

Author(s):

A. B. Moustafa ◽

A. Faizalla

Keyword(s):

Emulsion Polymerization ◽

Methacrylic Acid ◽

Triethylene Glycol ◽

Synthesis And Characterization ◽

Glycol Dimethacrylate ◽

Triethylene Glycol Dimethacrylate ◽

Seed Emulsion Polymerization ◽

Porous Poly

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Novel Core–Shell of Polymethyl Methacrylate/butyl Acrylate/vinyl Silica Nanocomposite Particles through Seed Emulsion Polymerization

Polymer-Plastics Technology and Engineering ◽

10.1080/03602559.2016.1227842 ◽

2016 ◽

Vol 56 (4) ◽

pp. 411-420 ◽

Cited By ~ 2

Author(s):

H. Y. Mostafa ◽

Ahmed I. Hussain ◽

Ahmed M. EL-Masry ◽

Ahmed Maher

Keyword(s):

Emulsion Polymerization ◽

Polymethyl Methacrylate ◽

Butyl Acrylate ◽

Core Shell ◽

Nanocomposite Particles ◽

Silica Nanocomposite ◽

Seed Emulsion Polymerization

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CNT as a Sensor Platform

Handbook of Research on Nanoelectronic Sensor Modeling and Applications - Advances in Computer and Electrical Engineering ◽

10.4018/978-1-5225-0736-9.ch001 ◽

2017 ◽

pp. 1-18

Author(s):

Amir Fathi ◽

Mina Hassanzadazar

Keyword(s):

Carbon Nanotube ◽

Mechanical Strength ◽

Schottky Contact ◽

Volume Ratio ◽

The Other ◽

High Mechanical Strength ◽

Sensing Material ◽

Sensor Platform ◽

Alternative Materials ◽

Silicon Based

One of the most important drawbacks which caused the Silicon based technologies to their technical limitations is the instability of their products at nano-level. On the other side, carbon based materials such as carbon nanotube (CNT) as alternative materials have been involved in scientific efforts. Some of the important advantages of CNTs over silicon components are high mechanical strength, high sensing capability and large surface-to-volume ratio. Many researches have been presented using CNT as a sensing material in various applications to improve the sensor characteristics. In this chapter, the platform of CNT sensors such as transistor-based sensors, chemiresistors, chemicapacitance and resonator sensors are discussed in detail. Using CNT as a sensor platform although has great advantages; it does not have sufficient sensor reliability. Some of these technical challenges of CNT-based sensors including Schottky contact formation and non-selective synthesization have also been pointed out in the chapter.

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Multicolor-Effects of Luminescing, Nanostructured Silicon After Spark-Processing in Pure and Composite Gases

MRS Proceedings ◽

10.1557/proc-452-153 ◽

1996 ◽

Vol 452 ◽

Cited By ~ 1

Author(s):

M. H. Ludwig ◽

A. Augustin ◽

R. E. Hummel

Keyword(s):

Laser Light ◽

Blue Emission ◽

Volume Ratio ◽

Green Emission ◽

Radiative Properties ◽

Pure Oxygen ◽

Processing Conditions ◽

Pure Nitrogen ◽

Silicon Based ◽

Gas Pressures

AbstractSpark-processing has been shown recently to generate a silicon-based substance which intensely photoluminesces in the UV/blue or green spectral range, depending on whether the preparation was performed in flowing or stagnant air, respectively. This study reports about significant differences for the radiative properties of spark-processed silicon after preparations in oxygen, nitrogen, and mixtures of both gases. Whereas there is essentially no photoluminescence (PL) after processing in pure nitrogen, an orange PL band at 1.89 eV occurs after preparation in pure oxygen. The orange PL degrades with time and when exposed to laser light. Furthermore, it switches immediately to a more intense blue emission centered at 2.61 eV when the sample is subjected to lower gas pressures. A similar 2.6 eV PL is observed after heat treatments up to 350°C. If, however, spark-processing of Si is carried out in nitrogen and oxygen is added, a green PL arises, centered at 2.35 eV. Moreover, for a volume ratio of about 1:1 N2/O2 a PL band at 3.22 eV emerges, superimposing the green emission. Both bands are about two orders of magnitude more intense than the orange PL, when prepared under otherwise identical processing conditions.

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