TY - JOUR
T1 - Dual soft-template system based on colloidal chemistry for the synthesis of hollow mesoporous silica nanoparticles
AU - Li, Yunqi
AU - Bastakoti, Bishnu Prasad
AU - Imura, Masataka
AU - Tang, Jing
AU - Aldalbahi, Ali
AU - Torad, Nagy L.
AU - Yamauchi, Yusuke
PY - 2015/4/20
Y1 - 2015/4/20
N2 - A new dual soft-template system comprising the asymmetric triblock copolymer poly(styrene-b-2-vinyl pyridine-b-ethylene oxide) (PS-b-P2VP-b-PEO) and the cationic surfactant cetyltrimethylammonium bromide (CTAB) is used to synthesize hollow mesoporous silica (HMS) nanoparticles with a center void of around 17 nm. The stable PS-b-P2VP-b-PEO polymeric micelle serves as a template to form the hollow interior, while the CTAB surfactant serves as a template to form mesopores in the shells. The P2VP blocks on the polymeric micelles can interact with positively charged CTA+ ions via negatively charged hydrolyzed silica species. Thus, dual soft-templates clearly have different roles for the preparation of the HMS nanoparticles. Interestingly, the thicknesses of the mesoporous shell are tunable by varying the amounts of TEOS and CTAB. This study provides new insight on the preparation of mesoporous materials based on colloidal chemistry. The right mix: A new dual soft-template system comprising the asymmetric triblock copolymer poly(styrene-b-2-vinyl pyridine-b-ethylene oxide) (PS-b-P2VP-b-PEO) and the cationic surfactant cetyltrimethylammonium bromide (CTAB) is used to synthesize hollow mesoporous silica (HMS) nanoparticles. The thicknesses of the mesoporous shell are tunable by varying the amounts of TEOS and CTAB.
AB - A new dual soft-template system comprising the asymmetric triblock copolymer poly(styrene-b-2-vinyl pyridine-b-ethylene oxide) (PS-b-P2VP-b-PEO) and the cationic surfactant cetyltrimethylammonium bromide (CTAB) is used to synthesize hollow mesoporous silica (HMS) nanoparticles with a center void of around 17 nm. The stable PS-b-P2VP-b-PEO polymeric micelle serves as a template to form the hollow interior, while the CTAB surfactant serves as a template to form mesopores in the shells. The P2VP blocks on the polymeric micelles can interact with positively charged CTA+ ions via negatively charged hydrolyzed silica species. Thus, dual soft-templates clearly have different roles for the preparation of the HMS nanoparticles. Interestingly, the thicknesses of the mesoporous shell are tunable by varying the amounts of TEOS and CTAB. This study provides new insight on the preparation of mesoporous materials based on colloidal chemistry. The right mix: A new dual soft-template system comprising the asymmetric triblock copolymer poly(styrene-b-2-vinyl pyridine-b-ethylene oxide) (PS-b-P2VP-b-PEO) and the cationic surfactant cetyltrimethylammonium bromide (CTAB) is used to synthesize hollow mesoporous silica (HMS) nanoparticles. The thicknesses of the mesoporous shell are tunable by varying the amounts of TEOS and CTAB.
KW - dual soft-template
KW - hollow particles
KW - mesoporous materials
KW - nanoparticles
KW - polymeric micelles
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U2 - 10.1002/chem.201406137
DO - 10.1002/chem.201406137
M3 - Article
SN - 0947-6539
VL - 21
SP - 6375
EP - 6380
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 17
ER -