نتایج جستجو برای: silica shell

تعداد نتایج: 88287  

Journal: :Langmuir : the ACS journal of surfaces and colloids 2007
Huijuan Zhang Jun Wu Longping Zhou Dayong Zhang Limin Qi

Mesoporous silica materials with a variety of morphologies, such as monodisperse microspheres, gigantic hollow structures comprising a thin shell with a hole, and gigantic hollow structures consisting of an outer thin shell and an inner layer composed of many small spheres, have been readily synthesized in mixed water-ethanol solvents at room temperature using cetyltrimethylammonium bromide (CT...

Journal: :Chemical communications 2011
Jianping Yang Fan Zhang Yiran Chen Sheng Qian Pan Hu Wei Li Yonghui Deng Yin Fang Lu Han Mohammad Luqman Dongyuan Zhao

A novel mesoporous nanocarrier consisting of a silver core, a silica spacer with controlled thickness and a fluorophores-loaded mesoporous silica shell was fabricated for the metal-enhanced fluorescence (MEF) and Förster resonance energy transfer (FRET) effects.

Journal: :Chemical communications 2008
Dechao Niu Yongsheng Li Xiaoli Qiao Liang Li Wenru Zhao Hangrong Chen Qiaoling Zhao Zhi Ma Jianlin Shi

Novel amino- or thiol-functionalized superparamagnetic copolymer-silica nanospheres (NH2-SMCSNs/SH-SMCSNs), which consist of a magnetic core and a silica cross-linked block copolymer shell, have been fabricated.

Journal: :Molecules 2016
Xiaoli Zhang Litao Wang Shuqing Dong Xia Zhang Qi Wu Liang Zhao Yanping Shi

Core-shell silica microspheres with a nanocellulose derivative in the hybrid shell were successfully prepared as a chiral stationary phase by a layer-by-layer self-assembly method. The hybrid shell assembled on the silica core was formed using a surfactant as template by the copolymerization reaction of tetraethyl orthosilicate and the nanocellulose derivative bearing triethoxysilyl and 3,5-dim...

Journal: :Chemical communications 2006
Jyongsik Jang Jungseok Ha Byungkwon Lim

Monodisperse silica-polyaniline core-shell nanoparticles with an average diameter of 26 nm were synthesized by in-situ polymerisation of aniline monomers adsorbed on the silica surface through electrostatic interactions.

2011
Sonalika Vaidya Pallavi Thaplyal Ashok Kumar Ganguli

Core-shell nanostructures of Mn2O3@SiO2, Mn2O3@amino-functionalized silica, Mn2O3@vinyl-functionalized silica, and Mn2O3@allyl-functionalized silica were synthesized using the hydrolysis of the respective organosilane precursor over Mn2O3 nanoparticles dispersed using colloidal solutions of Tergitol and cyclohexane. The synthetic methodology used is an improvement over the commonly used post-gr...

2018
Syed A. Haque Socrates Jose P. Cañete

Background An HPLC method employing a post-column derivatization strategy using the cupric reducing antioxidant capacity reagent (CUPRAC reagent) for the determining antioxidants in plant-based materials leverages the separation capability of regular HPLC approaches while allowing for detection specificity for antioxidants. Methods Three different column types, namely core-shell and porous si...

Journal: :Chemical communications 2010
Myungje Cho Kipil Lim Kyoungja Woo

We present colloidal silica microspheres encapsulating a homogeneous quantum dot layer at radial equidistance from the centre by utilizing electrostatic interaction between surface-engineered silica microspheres and QDs. The microspheres show dramatically enhanced optical absorption and emission with an appropriate silica shell thickness.

Journal: :Chemical communications 2002
Bryce Sadtler Alexander Wei

Core-shell ensembles of citrate-stabilized gold nanoparticles (20-80 nm) on submicron silica cores (330-550 nm) have been prepared by electrostatic self-assembly with shell packing densities as high as phi = 0.55.

Journal: :Chemical communications 2009
Fuke Wang Chuanbin Mao

Hybrid micro-/nano-silica architectures made of bacterial-body-templated silica shell attached with fimbriae-templated silica nanotubes were prepared by using living fimbriaed bacteria E. Coli TG1 as templates, which can function as individual bioreactors to catalyze the hydrolysis of 4-nitrophenyl-beta-d-galactopyranoside to form p-nitrophenol due to the presence of an intracellular enzyme.

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