Dendritic silica nanoparticles synthesized by a block copolymer-directed seed-regrowth approach

Junzheng Wang; Ayae Sugawara-Narutaki; Atsushi Shimojima; Minoru Osada; Renzhi Ma; Tatsuya Okubo

doi:10.1021/la504955b

Dendritic silica nanoparticles synthesized by a block copolymer-directed seed-regrowth approach

Junzheng Wang, Ayae Sugawara-Narutaki, Atsushi Shimojima, Minoru Osada, Renzhi Ma, Tatsuya Okubo^*

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

A facile seed regrowth method is presented for the preparation of a new type of colloidal dendritic silica nanoparticles (DSNPs) with unique Konpeito-like morphology and high surface area (â4400 m² g^-1). Growth of silica nanoprotrusions on the surfaces of colloidal silica nanoparticles proceeds by hydrolysis and polycondensation of tetraethoxysilane (TEOS) in the presence of a PEO-PPO-PEO-type block copolymer (Pluronic F127) under controlled pH conditions. The polymers adsorbed on the seed surface play a crucial role in the formation of DSNPs. DSNPs with controllable size (28-85 nm) and narrow size distributions can be obtained by using monodisperse silica nanoparticles with various sizes as seeds. The surface morphology of DSNPs is tunable by changing the concentration of TEOS. Additionally, novel dendritic silica nanochains are prepared using one-dimensionally assembled silica nanoparticles as the seeds.

Original language	English
Pages (from-to)	1610-1614
Number of pages	5
Journal	Langmuir
Volume	31
Issue number	5
DOIs	https://doi.org/10.1021/la504955b
Publication status	Published - 2015 Feb 10

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la504955b

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title = "Dendritic silica nanoparticles synthesized by a block copolymer-directed seed-regrowth approach",

abstract = "A facile seed regrowth method is presented for the preparation of a new type of colloidal dendritic silica nanoparticles (DSNPs) with unique Konpeito-like morphology and high surface area ({\^a}4400 m2 g-1). Growth of silica nanoprotrusions on the surfaces of colloidal silica nanoparticles proceeds by hydrolysis and polycondensation of tetraethoxysilane (TEOS) in the presence of a PEO-PPO-PEO-type block copolymer (Pluronic F127) under controlled pH conditions. The polymers adsorbed on the seed surface play a crucial role in the formation of DSNPs. DSNPs with controllable size (28-85 nm) and narrow size distributions can be obtained by using monodisperse silica nanoparticles with various sizes as seeds. The surface morphology of DSNPs is tunable by changing the concentration of TEOS. Additionally, novel dendritic silica nanochains are prepared using one-dimensionally assembled silica nanoparticles as the seeds.",

author = "Junzheng Wang and Ayae Sugawara-Narutaki and Atsushi Shimojima and Minoru Osada and Renzhi Ma and Tatsuya Okubo",

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T1 - Dendritic silica nanoparticles synthesized by a block copolymer-directed seed-regrowth approach

AU - Wang, Junzheng

AU - Sugawara-Narutaki, Ayae

AU - Shimojima, Atsushi

AU - Osada, Minoru

AU - Ma, Renzhi

AU - Okubo, Tatsuya

PY - 2015/2/10

Y1 - 2015/2/10

N2 - A facile seed regrowth method is presented for the preparation of a new type of colloidal dendritic silica nanoparticles (DSNPs) with unique Konpeito-like morphology and high surface area (â4400 m2 g-1). Growth of silica nanoprotrusions on the surfaces of colloidal silica nanoparticles proceeds by hydrolysis and polycondensation of tetraethoxysilane (TEOS) in the presence of a PEO-PPO-PEO-type block copolymer (Pluronic F127) under controlled pH conditions. The polymers adsorbed on the seed surface play a crucial role in the formation of DSNPs. DSNPs with controllable size (28-85 nm) and narrow size distributions can be obtained by using monodisperse silica nanoparticles with various sizes as seeds. The surface morphology of DSNPs is tunable by changing the concentration of TEOS. Additionally, novel dendritic silica nanochains are prepared using one-dimensionally assembled silica nanoparticles as the seeds.

AB - A facile seed regrowth method is presented for the preparation of a new type of colloidal dendritic silica nanoparticles (DSNPs) with unique Konpeito-like morphology and high surface area (â4400 m2 g-1). Growth of silica nanoprotrusions on the surfaces of colloidal silica nanoparticles proceeds by hydrolysis and polycondensation of tetraethoxysilane (TEOS) in the presence of a PEO-PPO-PEO-type block copolymer (Pluronic F127) under controlled pH conditions. The polymers adsorbed on the seed surface play a crucial role in the formation of DSNPs. DSNPs with controllable size (28-85 nm) and narrow size distributions can be obtained by using monodisperse silica nanoparticles with various sizes as seeds. The surface morphology of DSNPs is tunable by changing the concentration of TEOS. Additionally, novel dendritic silica nanochains are prepared using one-dimensionally assembled silica nanoparticles as the seeds.

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Dendritic silica nanoparticles synthesized by a block copolymer-directed seed-regrowth approach

Abstract

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