Fabrication of sub-micrometer-sized jingle bell-shaped hollow spheres from multilayered core-shell particles.
Fabrication of sub-micrometer-sized jingle bell-shaped hollow spheres from multilayered core-shell particles.
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DOI：
10.1016/j.jcis.2004.06.037
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发表时间：
2004-11
影响因子：
9.9
通讯作者：
Shunchao Gu;Tomohiro Kondo;E. Mine;D. Nagao;Yoshio Kobayashi;M. Konno
中科院分区：
文献类型：
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作者：
Shunchao Gu;Tomohiro Kondo;E. Mine;D. Nagao;Yoshio Kobayashi;M. Konno
叮当响钟形空心球是从由二氧化硅核、聚苯乙烯内壳和二氧化钛外壳组成的多层颗粒开始制造的。二氧化硅核-聚苯乙烯壳的复合颗粒，通过在乳液聚合中用厚度为238 nm的聚苯乙烯壳涂覆339 nm尺寸的二氧化硅核而合成，被用作随后的二氧化钛涂层的核颗粒。采用溶胶-凝胶法形成厚度为37 nm的二氧化钛外壳。通过将多层颗粒浸入四氢呋喃中除去多层颗粒中的聚苯乙烯内壳。这些连续的过程可以产生叮当作响的钟形空心球，其中包含在二氧化钛外壳中的二氧化硅核心。
Jingle bell-shaped hollow spheres were fabricated starting from multilayered particles composed of a silica core, a polystyrene inner shell, and a titania outer shell. Composite particles of silica core–polystyrene shell, synthesized by coating a 339-nm-sized silica core with a polystyrene shell of thickness 238 nm in emulsion polymerization, were used as core particles for a succeeding titania-coating. A sol–gel method was employed to form the titania outer shell with a thickness of 37 nm. The inner polystyrene shell in the multilayered particles was removed by immersing them in tetrahydrofuran. These successive procedures could produce jingle bell-shaped hollow spheres that contained a silica core in the titania shell.