Silica-Polypyrrole Core–Shell Nanocomposites as Active Materials for Dielectrophoretic Displays

2008 ◽  
Vol 8 (9) ◽  
pp. 4353-4359 ◽  
Author(s):  
F. Miomandre ◽  
P. Audebert ◽  
J. P. Bonnet ◽  
A. Brosseau ◽  
P. Perriat ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Light Transmission ◽  
Silica Shell ◽  
Core Shell ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
Active Materials ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Electrorheological Properties

A direct route to silica-polypyrrole core–shell nanoparticles has been used to design new nanocomposites, in which the conducting part is then wrapped by an external silica shell in order to have finally neutral nanoparticles. The nanocomposites are characterized by TEM, spectroscopy, electrochemistry and thermal gravimetric analysis, demonstrating that the external silica shell actually insulates the conjugated polymer from the outer medium. Finally the electrorheological properties of these nanocomposites are checked in a dielectrophoretic device in which the motion of the particles induced by an external electric field can be used to monitor a switch of the light transmission properties.

General synthesis of high-performing magneto-conjugated polymer core–shell nanoparticles for multifunctional theranostics

Nano Research ◽  
2016 ◽  
Vol 10 (2) ◽  
pp. 704-717 ◽  
Author(s):  
Hao Yan ◽  
Lingyun Zhao ◽  
Wenting Shang ◽  
Zhongqun Liu ◽  
Wensheng Xie ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
High Performing ◽  
Core Shell Nanoparticles ◽  
General Synthesis

Preparation of TiO2-g-Polystyrene Nanosphere and its Application in Toughening PS Matrix

2010 ◽  
Vol 97-101 ◽  
pp. 1677-1680 ◽  
Author(s):  
Xiao Ming Sang ◽  
Peng Wu ◽  
Gui Xiang Hou ◽  
Shou Wu Yu
Keyword(s):  
Impact Strength ◽  
Core Shell ◽  
Gravimetric Analysis ◽  
Nano Tio2 ◽  
Shell Nanoparticles ◽  
Maximum Value ◽  
Transmission Electron ◽  
Electron Microscopes ◽  
Core Shell Nanoparticles ◽  
The Impact

TiO2-g-Polystyrene(PS) nano-microspheres were prepared by grafted styrene monomer on the surface of nano-TiO2 particles via emulsion polymerization, and its surface and morphology were studied by Transmission electron microscopes(TEM), Fourier transform infrared spectroscopy(FTIR) and thermal gravimetric analysis(TGA). The results showed that the TiO2-g-PS nano-microsphere had a structure of sphericity composed of TiO2 and PS as core and shell respectively. The core-shell nanoparticles were subsequently used as filler in a PS matrix, and the impact strength of the TiO2-g-PS/PS composites were studied. The results showed that the impact strength of the composite material could be improved obviously, the maximum value of impacted strength of the TiO2-g-PS/PS was 1.75kJ/m2, which was 180% higher than that of pure PS. Drawing from the results, it could be confirmed that these core-shell TiO2-g-PS nanosphere fillers could toughen the PS matrix.

scholarly journals Upconversion luminescence and temperature sensing properties of NaGd(WO4)2:Yb3+/Er3+@SiO2 core–shell nanoparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 3981-3989
Author(s):  
Lu Zheng ◽  
Xinyi Huang ◽  
Jiuping Zhong ◽  
Zijun Wang ◽  
Xiaoning Cheng
Keyword(s):  
Upconversion Luminescence ◽  
Silica Shell ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Sensing Properties ◽  
The Core ◽  
Thermal Sensing ◽  
Core Shell Nanoparticles

A shell of SiO2 with tunable thickness was uniformly coated on NaGd(WO4)2:Yb3+/Er3+ core upconversion nanoparticles (UCNPs). The effects of the silica shell on UC luminescence and thermal sensing properties of the core–shell UCNPs were investigated.

Quinazolinone Derivatives Loaded Polypyrrole/Chitosan Core–Shell Nanoparticles with Different Morphologies: Antibacterial and Anticancer Activities

NANO ◽  
2017 ◽  
Vol 12 (01) ◽  
pp. 1750002 ◽  
Author(s):  
Nehal Salahuddin ◽  
Ahmed A. Elbarbary ◽  
Hend A. Alkabes
Keyword(s):  
Oxidative Polymerization ◽  
Cancer Cell Line ◽  
Ehrlich Ascites Carcinoma ◽  
Core Shell ◽  
Gravimetric Analysis ◽  
Anticancer Activities ◽  
Shell Nanoparticles ◽  
Ehrlich Ascites ◽  
Core Shell Nanoparticles ◽  
Quinazolinone Derivatives

Polypyrrole/chitosan (PPC) spherical dark nanoparticles surrounded by shadow spheres were fabricated through in situ oxidative polymerization of pyrrole in presence of chitosan (CS) using ferric chloride (FeCl3) as oxidant and evaluated as a carrier for some amino-quinazolinone derivatives (I–IV). The loading of amino-quinazolinone derivatives (I–IV) into the core–shell nanoparticles were investigated by thermal gravimetric analysis (TGA). Quinazolinone derivatives (I–IV) loaded nanoparticles showed inter-connected sphere in necklace-like morphology, rods or filaments depending on the functional groups in quinazolinone derivatives. The release of quinazolinone derivatives from PPC nanoparticles was pH sensitive. The antimicrobial activity of loaded PPC nanoparticles against gram positive and gram negative bacteria was higher than CS and PPC nanoparticles. The results revealed that new generation of nanoparticles loaded with quinazolinone represent a potential platform to target breast cancer cell line (MCF7), Ehrlich ascites carcinoma (EAC) cells and liver cancer cells (HEPG2) in comparison with PPC and quinazolinone derivatives.

Conjugated polymer mediated synthesis of nanoparticle clusters and core/shell nanoparticles

Polymer ◽  
2013 ◽  
Vol 54 (2) ◽  
pp. 485-489 ◽  
Author(s):  
Ping Xu ◽  
Kuan Chang ◽  
Young Il Park ◽  
Bin Zhang ◽  
Leilei Kang ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Nanoparticle Clusters ◽  
Core Shell Nanoparticles

Facile core–shell nanoparticles with controllable antibacterial activity assembled by chemical and biological molecules

2019 ◽  
Vol 7 (12) ◽  
pp. 5528-5534 ◽  
Author(s):  
Lixia Guo ◽  
Haoping Wang ◽  
Yunxia Wang ◽  
Liheng Feng
Keyword(s):  
Self Assembly ◽  
Conjugated Polymer ◽  
Polymer Nanoparticles ◽  
Biological Molecules ◽  
Core Shell ◽  
Hoechst 33258 ◽  
Shell Nanoparticles ◽  
Deoxyribonuclease I ◽  
Conjugated Polymer Nanoparticles ◽  
Core Shell Nanoparticles

A newly switchable antibacterial self-assembly was developed by conjugated polymer nanoparticles, DNA, Hoechst 33258 and deoxyribonuclease I.

Multifunctional Fe3O4@nSiO2@mSiO2/Pr-Imi-NH2·Ag core–shell microspheres as highly efficient catalysts in the aqueous reduction of nitroarenes: improved catalytic activity and facile catalyst recovery

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 41871-41877 ◽  
Author(s):  
Mina Jafari Nasab ◽  
Ali Reza Kiasat
Keyword(s):  
Catalytic Activity ◽  
Iron Oxide ◽  
Mesoporous Silica ◽  
Superparamagnetic Iron Oxide ◽  
Silica Shell ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Functionalized Mesoporous Silica ◽  
Iron Oxide Core ◽  
Core Shell Nanoparticles

Core@shell nanoparticles with a superparamagnetic iron oxide core, a middle nonporous silica shell, and an outer organo functionalized mesoporous silica shell were synthesized and evaluated for immobilizing Ag nanoparticles.

Preparation of fluorescent Au–SiO2 core–shell nanoparticles and nanorods with tunable silica shell thickness and surface modification for immunotargeting

2016 ◽  
Vol 4 (32) ◽  
pp. 5418-5428 ◽  
Author(s):  
Prakash D. Nallathamby ◽  
Juliane Hopf ◽  
Lisa E. Irimata ◽  
Tracie L. McGinnity ◽  
Ryan K. Roeder
Keyword(s):  
Biomedical Applications ◽  
Shell Thickness ◽  
Silica Shell ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Size Dependent ◽  
Scalable Methods ◽  
Core Shell Nanoparticles ◽  
Multifunctional Properties

Scalable methods for preparing and modifying Au–SiO2 core–shell nanoparticles provide a platform for engineering size-dependent multifunctional properties for in vivo biomedical applications.

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