Direct Fabrication of Monodisperse Silica Nanorings from Hollow Spheres – A Template for Core–Shell Nanorings

2016 ◽  
Vol 8 (16) ◽  
pp. 10451-10458 ◽  
Author(s):  
Kuo Zhong ◽  
Jiaqi Li ◽  
Liwang Liu ◽  
Ward Brullot ◽  
Maarten Bloemen ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Core Shell ◽  
Direct Fabrication ◽  
Monodisperse Silica

Fabrication of sub-micrometer-sized jingle bell-shaped hollow spheres from multilayered core–shell particles

2004 ◽  
Vol 279 (1) ◽  
pp. 281-283 ◽  
Author(s):  
Shunchao Gu ◽  
Tomohiro Kondo ◽  
Eiichi Mine ◽  
Daisuke Nagao ◽  
Yoshio Kobayashi ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Core Shell ◽  
Shell Particles

scholarly journals Synthesis and Control of the Shell Thickness of Polyaniline and Polypyrrole Half Hollow Spheres Using the Polystyrene Cores

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Su-Ryeon Yun ◽  
Gyeong-Ok Kim ◽  
Chan Woo Lee ◽  
Nam-Ju Jo ◽  
Yongku Kang ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Hollow Spheres ◽  
Core Shell ◽  
Chemical Structures ◽  
The Core ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Core Shell Structure ◽  
And Control ◽  
Ft Ir Spectroscopy

Polyaniline (Pani) and polypyrrole (Ppy) half hollow spheres with different shell thicknesses were successfully synthesized by three steps process using polystyrene (PS) as the core. The PS core was synthesized by emulsion polymerization. Aniline and pyrrole monomers were polymerized on the surface of the PS core. The shells of Pani and Ppy were fabricated by adding different amounts of aniline and pyrrole monomers. PS cores were dissolved and removed from the core shell structure by solvent extraction. The thicknesses of the Pani and Ppy half hollow spheres were observed by FE-SEM and FE-TEM. The chemical structures of the Pani and Ppy half hollow spheres were characterized by FT-IR spectroscopy and UV-Vis spectroscopy. The shell thicknesses of the Pani half hollow spheres were 30.2, 38.0, 42.2, 48.2, and 52.4 nm, while the shell thicknesses of the Ppy half hollow spheres were 16.0, 22.0, 27.0, and 34.0 nm. The shell thicknesses of Pani and Ppy half hollow spheres linearly increased as the amount of the monomer increased. Therefore, the shell thickness of the Pani and Ppy half hollow spheres can be controlled in these ranges.

scholarly journals An electroless-plating-like solution approach for the preparation of PS@TiO2@Ag core–shell spheres

RSC Advances ◽  
2020 ◽  
Vol 10 (16) ◽  
pp. 9341-9346 ◽  
Author(s):  
Chao Wang ◽  
Daichuan Ma ◽  
Xinsheng Li ◽  
Daibing Luo ◽  
Liangzhuan Wu
Keyword(s):  
Electroless Plating ◽  
Hollow Spheres ◽  
Core Shell ◽  
Solution Deposition ◽  
Solution Approach

PS@TiO2@Ag spheres with a core–shell nanostructure were prepared by electroless-plating-like solution deposition (EPLSD) method, which can be alternatively extended to prepare PS@metal(1) oxide@metal(2) composite spheres and their relative hollow spheres.

Preparation of PS@SiO2, PS@TiO2，PS@TiO2/SiO2 Core-Shell Composites by a Spray Drying Process and Their Hollow Spheres after Removing PS Cores by Calcinations

2011 ◽  
Vol 194-196 ◽  
pp. 389-392
Author(s):  
Ling Li ◽  
Hong Liang Li ◽  
Ying Chun Zhu ◽  
Ai Ping Fu ◽  
Yong Wan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Spray Drying ◽  
Hollow Spheres ◽  
Nitrogen Adsorption ◽  
Core Shell ◽  
Drying Process ◽  
The Core ◽  
Adsorption Desorption ◽  
Drying Chamber ◽  
Scanning Electron

Polystyrene (PS) spheres encapsulated core-shell composites of SiO2or TiO2nanoparticles were prepared by the spray drying technique and hollow spheres of SiO2or TiO2nanoparticles were then derived by removing the PS cores with calcinations. The PS spheres were dispersed into the SiO2or TiO2colloids, forming a suspension and then the suspensions were sprayed to form micrometer-sized droplets, as the droplets rush through the drying chamber, the PS spheres were encapsulated into the core of SiO2or TiO2particles due to the high temperatures and the instant evaporation, obtaining PS@SiO2, PS@TiO2or PS@SiO2/TiO2core-shell composites. After removing the PS core by calcination at 550°C, SiO2or TiO2hollow spheres were then derived. The influence of drying temperature, the concentration of the SiO2or TiO2particles and the ratio of PS sphere to the particles on the structures and specific surface area of the hollow spheres were studied with scanning electron microscopy (SEM) and nitrogen adsorption-desorption measurements.

scholarly journals Scalable synthesis of smooth PS@TiO2 core-shell and TiO2 hollow spheres in the (sub) micron size range: understanding synthesis and calcination parameters

2020 ◽  
Vol 298 (7) ◽  
pp. 867-878
Author(s):  
Anna M. Lechner ◽  
Tanja Feller ◽  
Qimeng Song ◽  
Bernd A. F. Kopera ◽  
Lukas Heindl ◽  
...  
Keyword(s):  
Size Range ◽  
Hollow Spheres ◽  
Core Shell ◽  
Micron Size ◽  
Scalable Synthesis ◽  
Tio2 Hollow Spheres
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