Gold nanoparticle cluster–plasmon-enhanced fluorescent silica core–shell nanoparticles for X-ray computed tomography–fluorescence dual-mode imaging of tumors

Enzyme immobilization techniques are widely researched due to their wide range of applications. Polymer–protein core–shell nanoparticles (CSNPs) have emerged as a promising technique for enzyme/protein immobilization via a self-assembly process. Based on the desired application, different sizes and distribution of the polymer–protein CSNPs may be required. This work systematically studies the assembly process of poly(4-vinyl pyridine) and bovine serum albumin CSNPs. Average particle size was controlled by varying the concentrations of each reagent. Particle size and size distributions were monitored by dynamic light scattering, ultra-small-angle X-ray scattering, small-angle X-ray scattering and transmission electron microscopy. Results showed a wide range of CSNPs could be assembled ranging from an average radius as small as 52.3 nm, to particles above 1 µm by adjusting reagent concentrations. In situ X-ray scattering techniques monitored particle assembly as a function of time showing the initial particle growth followed by a decrease in particle size as they reach equilibrium. The results outline a general strategy that can be applied to other CSNP systems to better control particle size and distribution for various applications.

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Plasmon-enhanced photocurrent in quasi-solid-state dye-sensitized solar cells by the inclusion of gold/silica core–shell nanoparticles in a TiO2 photoanode

Journal of Materials Chemistry A ◽

10.1039/c3ta11712j ◽

2013 ◽

Vol 1 (40) ◽

pp. 12627 ◽

Cited By ~ 22

Author(s):

Sanghyuk Wooh ◽

Yong-Gun Lee ◽

Muhammad Nawaz Tahir ◽

Donghoon Song ◽

Michael Meister ◽

...

Keyword(s):

Solar Cells ◽

Solid State ◽

Dye Sensitized Solar Cells ◽

Core Shell ◽

Shell Nanoparticles ◽

Dye Sensitized ◽

Silica Core ◽

Core Shell Nanoparticles ◽

Sensitized Solar Cells ◽

Tio2 Photoanode

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Monodisperse Fe3O4/Fe Core/Shell Nanoparticles with Enhanced Magnetic Property

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.306-307.410 ◽

2011 ◽

Vol 306-307 ◽

pp. 410-415

Author(s):

Li Sun ◽

Fu Tian Liu ◽

Qi Hui Jiang ◽

Xiu Xiu Chen ◽

Ping Yang

Keyword(s):

Average Diameter ◽

Chemical Precipitation ◽

Precipitation Method ◽

Core Shell ◽

X Ray Diffraction ◽

Shell Nanoparticles ◽

X Ray ◽

Transmission Electron ◽

Shell Particles ◽

Core Shell Nanoparticles

Core/shell type nanoparticles with an average diameter of 20nm were synthesized by chemical precipitation method. Firstly, Monodisperse Fe3O4 nanoparticles were synthesized by solvethermal method. FeSO47H2O and NaBH4 were respectively dissolved in distilled water, then moderated Fe3O4 particles and surfactant(PVP) were ultrasonic dispersed into the FeSO47H2O solution. The resulting solution was stirred 2 h at room temperature. Fe could be deposited on the surface of monodispersed Fe3O4 nanoparticles to form core-shell particles. The particles were characterized by using various experimental techniques, such as transmission electron microscopy (TEM), X-ray diffraction (XRD), AGM and DTA. The results suggest that the saturation magnetization of the nanocomposites is 100 emu/g. The composition of the samples show monodisperse and the sides of the core/shell nanoparticles are 20-30nm. It is noted that the formation of Fe3O4/Fe nanocomposites magnetite nanoparticles possess superparamagnetic property.

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