TY - JOUR
T1 - Polyethylenimine-assisted synthesis of hollow silica spheres without shape deformation
AU - Watanabe, Kanako
AU - Kuroda, Kotaro
AU - Nagao, Daisuke
N1 - Funding Information:
The authors thank technical support staff in the department of Engineering, Tohoku University for TEM images. This research was supported by the Ministry of Education, Culture, Sports, Science and Technology (JSPS KAKENHI Grant Numbers 16J03375 , 17H02744 , 20K21097 and Materials Processing Science project (“Materealize”) of MEXT , Grant Number JPMXP0219192801 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/4/1
Y1 - 2021/4/1
N2 - A self-templating method has been employed to explore both the concentration and size of template silica particles suitable for synthesis of rigid hollow spheres. Herein, polyethylenimine (PEI) was used as a surface protecting layer for the silica particles whose interiors were selectively dissolved in water to form the hollow particle structure. The morphology of hollow silica particles formed by the silica dissolution strongly depended on total surface area of the PEI-modified particles in aqueous solution. Spherical hollow particles were obtained in the range of low total surface area. In the range of high total surface area, however, hollow particle structures were deformed during the synthetic processes including the silica dissolution, centrifugation, and drying processes. The deformation phenomenon of hollow particles was explained using relative dimension of shell thickness to particle diameter. According to the total surface area of template silica particles studied above, the concentration of silica-coated gold nanorod in water was adjusted to selectively dissolve the particle interior, succeeding in hollow spherical particles containing a gold nanorod.
AB - A self-templating method has been employed to explore both the concentration and size of template silica particles suitable for synthesis of rigid hollow spheres. Herein, polyethylenimine (PEI) was used as a surface protecting layer for the silica particles whose interiors were selectively dissolved in water to form the hollow particle structure. The morphology of hollow silica particles formed by the silica dissolution strongly depended on total surface area of the PEI-modified particles in aqueous solution. Spherical hollow particles were obtained in the range of low total surface area. In the range of high total surface area, however, hollow particle structures were deformed during the synthetic processes including the silica dissolution, centrifugation, and drying processes. The deformation phenomenon of hollow particles was explained using relative dimension of shell thickness to particle diameter. According to the total surface area of template silica particles studied above, the concentration of silica-coated gold nanorod in water was adjusted to selectively dissolve the particle interior, succeeding in hollow spherical particles containing a gold nanorod.
KW - Gold nanorod
KW - Hollow particle
KW - Polyethylenimine
KW - Self-templating method
KW - Silica dissolution
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U2 - 10.1016/j.matchemphys.2021.124267
DO - 10.1016/j.matchemphys.2021.124267
M3 - Article
AN - SCOPUS:85099341579
SN - 0254-0584
VL - 262
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 124267
ER -