Synthesis of Mono-Dispersed Mesoporous Silica Spheres with Hexagonal Symmetry

Yano, Koichiro; Suzuki, Noritomo; Akimoto, Yuusuke; Fukushima, Yoshiaki

doi:10.1246/bcsj.75.1977

Cited by 46 publications

(31 citation statements)

References 21 publications

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“…On the other hand, primary particles aggregated at low surfactant/Si ratios because of the hydrophobic interactions between the surfactants that were not involved in the mesostructure formation but were adsorbed onto the nanoparticles without the formation of micelles. In addition, the use of a large amount of organic solvents that increase the critical micelle concentration may also cause the aggregation of mesostructured silica nanoparticles, as considered from the preparative conditions reported by Yano et al 21,42,79 Therefore, it should be important to use a high surfactant/Si ratio in the preparation of colloidal mesostructured silica nanoparticles.…”

Section: Major Factors For Preparation Ofmentioning

confidence: 99%

“…Yano et al succeeded in preparing pore-expanded MSNs through a post-treatment method ( Figure 34). 347349 Surfactants of mesostructured silica nanoparticles were exchanged with 21 In addition, Mou et al have prepared colloidal MSNs with a highly ordered structure. 29 Suteewong et al have reported preparing MSNs possessing a cubic structure by using very high molar ratios of 3-aminopropyltriethoxysilane.…”

Section: Soft Template;mentioning

confidence: 99%

“…17,21,29,3235,3739,4250 Different from aggregated MSNs, colloidal MSNs have very important properties, such as high uptake capability in vivo, mobility owing to Brownian motion, and good processability, and are promising as advanced materials for drug delivery systems (DDS) and optics. To the best of our knowledge, Mou began the first studies on DDS using colloidal MSNs, 29 and related studies have since been developed worldwide.…”

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confidence: 99%

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Colloidal Mesoporous Silica Nanoparticles

Yamamoto

Kuroda

2016

Bulletin of the Chemical Society of Japan

197

100

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IMMA. His current research interests include mesostructured materials, and several fields of inorganic materials chemistry. Some examples are intercalation chemistry, silicate chemistry, inorganic polymers, sol-gel chemistry, inorganic-organic hybrids, and self-organized materials. AbstractMesoporous silica nanoparticles (MSNs) with colloidal stability have attracted increasing interest because of their important properties, such as high transparency and cell uptake. Colloidal MSNs are comprehensively reviewed from the viewpoints of their preparation, characterization, and applications which include biomedical, catalytic, and optical materials. The following two points have been emphasized. The first point is that this review covers the widest range of introduction and discussion of the preparation and applications of both colloidal and noncolloidal MSNs. The second point is that this account contains a discussion from the viewpoints of both inorganic and colloid chemistries. After the introduction of the historical background of preparation of MSNs, preparative methods of colloidal MSNs and the major factors for the preparation of nanosized and colloidal MSNs are discussed. The methods to control the size, composition, morphology, and pore size of MSNs are also presented. Appropriate methods to obtain MSNs with high colloidal dispersibility are also discussed. Applications of colloidal MSNs are introduced with an emphasis on the colloidal stability. Issues to be addressed for further developments of colloidal MSNs are finally described.

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Section: Major Factors For Preparation Ofmentioning

confidence: 99%

Section: Soft Template;mentioning

confidence: 99%

mentioning

confidence: 99%

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Colloidal Mesoporous Silica Nanoparticles

Yamamoto

Kuroda

2016

Bulletin of the Chemical Society of Japan

197

100

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“…100 nm in diameter are expected to be useful for applications in DDS and transparent media such as low-refractive index materials, thermal insulation films, and low dielectric materials [6][7][8][9][10][11][12][13][14]. However, it has been difficult to synthesize monodisperse porous silica particles of 100 nm in diameter on an industrial scale, because the synthesis should take place in highly diluted solutions [10,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. We recently reported the large-scale synthesis of monodisperse microporous silica particles of 100 nm in diameter [31], based on the modified Stöber method [32].…”

Section: Introductionmentioning

confidence: 99%

Morphology control of microporous silica particles obtained by gradual injection of reactants

Shimogaki

Tokoro

Tabuchi

et al. 2015

J Sol-Gel Sci Technol

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Industrial-scale synthesis of fine-tuned monodisperse microporous silica is a central concern on fillers and optical applications. We recently reported that the efficient synthesis of monodisperse microporous silica particles can be achieved by the gradual injection of reactants. In the present study, we investigated the influence of the injection kinetics, the template, and catalyst contents on the morphology of the resulting silica particles. Their specific surface area (SSA) could be tuned from 100 to 500 m 2 /g by the amount of templating molecule, ndodecylamine, without changing the particle size and dispersibility. The most important parameters for controlling the particle size were found to be the amounts of catalyst. The resultant microporous and monodisperse silica particles exhibit diameter ranging from 20 to 200 nm and SSA from 50 to 1000 m 2 /g. These results show that the gradual injection of the reactants in a controlled manner is effective to the industrial-scale synthesis of the silica nanoparticles with expected morphologies. Graphical Abstract

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“…In later studies, hydrolysis was run in the presence of different surfactants in order to control the granule size [40]. The effect of surfactants on the size and properties of SiO 2 granules was studied in detail by Yono et al [41]. Varying the surfactant (cetyltrimethylammonium chloride) : NH 4 OH ratio, one can tune not only the size of the resulting SiO 2 granules but also their porosity, reducing the pore size down to 2-3 nm [42].…”

Section: Introductionmentioning

confidence: 99%

Microgranules and Nanoparticles on Their Surfaces

2005

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This review considers advances in the fabrication of metallic, oxide, sulfide, carbon, BN, and other microgranules-the building blocks of porous materials for various applications. It is shown that attaching nanoparticles to the surface of microgranules alters some of the most important properties of the matrix and offers the possibility of creating composite materials with unique physical properties and reactivity.

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Synthesis of Mono-Dispersed Mesoporous Silica Spheres with Hexagonal Symmetry

Cited by 46 publications

References 21 publications

Colloidal Mesoporous Silica Nanoparticles

Colloidal Mesoporous Silica Nanoparticles

Morphology control of microporous silica particles obtained by gradual injection of reactants

Microgranules and Nanoparticles on Their Surfaces

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