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Monodisperse ultra-large-pore silica coated polystyrene core-shell microbeads via layer-by-layer assembly for nano-micro composite

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Monodisperse ultra-large-pore silica coated polystyrene core-shell microbeads via layer-by-layer assembly for nano-micro composite

Content Provider	Springer Nature Link
Author	Xie, Chuang Liu, Yiqing Li, Hongda Hao, Hongxun Wang, Yongli Yin, Qiuxiang Wang, Jingkang
Copyright Year	2015
Abstract	Polystyrene(PS)@SiO$_{2}$ core-shell microbeads with large pore and large particle size were prepared via layer-by-layer(LBL)assembly technique for potential applications in nano-micro composites. Negative silica nanoparticles synthesized via modified Stöber method and cationic poly(diallyldimethylammonium chloride)were alternately adsorbed on the surface of microbeads. Zeta potential, size, and morphology of the microbeads were monitored during LBL assembly process to ensure the successful deposition of silica nanoparticles. The porous shell was characterized using nitrogen adsorption and desorption analyses, and the surface area, volume and diameter of the pores were derived. It is found that the porous shell thickness and the pore size can be tuned by changing the coating times of silica nanoparticles. Finally, PS@SiO$_{2}$ core-shell microbeads with 5,μm PS solid core and 350,nm mesoporous shell(mean BJH pore diameter is ~27,nm)were used to load CdSe/ZnS quantum dots(QDs). The fluorescence microscopic image and the optical amplification of the QDs-embedded microbeads (QDBs)indicate that the as-prepared core-shell microbeads can provide adequate space for QDs and may be useful for further application of nano-micro composites.
Starting Page	420
Ending Page	426
Page Count	7
File Format	PDF
ISSN	10064982
Journal	Transactions of Tianjin University
Volume Number	21
Issue Number	5
e-ISSN	19958196
Language	English
Publisher	Tianjin University
Publisher Date	2015-10-18
Publisher Place	Tianjin
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	large pore mesoporous silica core-shell structure microbeads layer-by-layer assembly nano-micro composite amplified spontaneous emission Mechanical Engineering Science
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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