نتایج جستجو برای: shell microspheres

تعداد نتایج: 63322  

2014
Mao Shen Wenping Jia Caiping Lin Guodong Fan Yangmin Jin Xiaoying Chen Guang Chen

In this paper, we investigated the functional imaging properties of magnetic microspheres composed of magnetic core and CdTe quantum dots in the silica shell functionalized with folic acid (FA). The preparation procedure included the preparation of chitosan-coated Fe3O4 nanoparticles (CS-coated Fe3O4 NPs) prepared by a one-pot solvothermal method, the reaction between carboxylic and amino group...

Journal: :Journal of Polymer Engineering 2022

Abstract The aim of the research was to identify influence different microencapsulated reaction time on morphology, size, infrared spectral, thermal and micromechanical properties melamine formaldehyde microspheres, synthesised with modified in situ polymerisation. Microspheres are particles a blurred boundary core shell due their same composition. synthesis microspheres paused after 1, 3, 9 15...

Journal: :Chemical communications 2003
Chang-Wen Guo Yong Cao Song-Hai Xie Wei-Lin Dai Kang-Nian Fan

Thermally stable mesoporous core-shell structured titania microspheres with well-defined hollow interiors were directly prepared by a novel hydrothermal precipitation of TiCl4 in the presence of urea and ammonium sulfate.

Journal: :Nanoscale 2015
Zhilong Su Xiaokang Li Xuesong Jiang Shaoliang Lin Jie Yin

We herein demonstrated an approach to control the spatial distribution of components in hybrid microspheres. Hybrid core-shell structured microspheres (CSMs) prepared through co-assembly were used as starting materials, which are comprised of anthracene-ended hyperbranched poly(ether amine) (AN-hPEA) in the shell and crystallized anthracene containing polyhedral oligomer silsesquioxane (AN-POSS...

2003
ZHAN Peng

We report a feasible approach to the preparation of monodispersed metal-shell composite microspheres based on a combination of surface reaction and surface seeding techniques. The method was implemented for coating polystyrene (PS) spheres with silver shell having a variable thickness by controlling the amount of reagents in the reaction procedure. These composite spherical particles in dimensi...

Journal: :Journal of the American Chemical Society 2005
Qunhui Sun Yulin Deng

In this communication, a novel one-pot synthetic strategy for preparing hollow PNIPAM microspheres via an interfacial polymerization approach at the interface of an inverse W/O emulsion has been proposed and demonstrated. The results show that the prepared PNIPAM microspheres have real empty core and polymer shell structure, with a size range of 1-3 mum. The hollow microspheres experienced a re...

Journal: :Journal of nanoscience and nanotechnology 2014
Huei-Shian Lin James R Carey

Nanoparticle coated microspheres are composed of two or more materials with a core/shell structure and exhibit unique abilities that allow amplification of trace targets in immunoassays. The preparation of nanoparticle coated microspheres can be accomplished using three main strategies: (1) in-situ, (2) ex-situ, and (3) hollow sphere methods. Antibodies or biomolecules can be immobilized on the...

Journal: :Journal of the American Chemical Society 2006
Farah Jean-Jacques Toublan Stephen Boppart Kenneth S Suslick

Protein microspheres have been used in the fields of biomedical imaging and drug delivery, but surface modification for cell targeting has been problematic. We have for the first time used an electrostatic adhesion approach to adhere arginine-glutamic acid-aspartic acid (RGD) containing peptides to the surface of protein microspheres for the purpose of targeting these vesicles to tumor cells. R...

Journal: :Biophysical journal 1994
K J Liu M W Grinstaff J Jiang K S Suslick H M Swartz W Wang

Proteinaceous microspheres filled with nitroxides dissolved in an organic liquid have been synthesized for the first time using high intensity ultrasound; these were used to measure oxygen concentrations in living biological systems. The microspheres have an average size of 2.5 microns, and the proteinaceous shell is permeable to oxygen. Encapsulation of the nitroxides into the microsphere grea...

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