Synthesis of Artificial Opals with Uniform Mesoporous Silica Spheres

Chen, Chau Nan; Lin, Hong-Ping; Tsai, Chih Pin; Tang, Chin Yuan

doi:10.1246/cl.2004.838

Cited by 12 publications

(6 citation statements)

References 15 publications

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“…Although many studies of mesoporous silica nanoparticles have been reported, − the hexagonal arrangement of mesopores was disordered in nanoscale particles. Nanoparticles of MCM-41 ranging from 23 to 100 nm in size were prepared by neutralization .…”

Section: Introductionmentioning

confidence: 99%

Structural Control of Mesoporous Silica Nanoparticles in a Binary Surfactant System

2005

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The grain size and regularity of the hexagonal array of mesoporous silica nanoparticles were investigated in a binary surfactant system composed of cetyltrimethylammonium chloride and triblock copolymer EO106PO60EO106. Structural control was achieved by varying the parameters for the prior hydrolysis of silicon alkoxide under an acidic condition and the subsequent assembly of silicates and surfactants under a basic condition. The formation of the mesoscale architectures was based on the balance between the ordered assembly of anionic silicates and the cationic surfactant through electrostatic interaction and the inhibition of grain growth with a nonionic amphiphilic agent through hydrogen bonds.

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Section: Introductionmentioning

confidence: 99%

Structural Control of Mesoporous Silica Nanoparticles in a Binary Surfactant System

2005

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“…Rocha and co-workers synthesized benzene-bridged PMOs using C14 to C18 alkyltrimethylammonium bromide as surfactants; the resulting materials exhibited molecular-scale periodicity and pore diameters tunable from 32 to 39 Å. In addition to controlling the pore size of PMOs, surfactants with varying chain length can modify the hydrophobicity/hydrophilicity of the synthesis gel, and therefore, they significantly influence the morphology of the materials.…”

Section: Introductionmentioning

confidence: 99%

Surfactant Mediated Control of Pore Size and Morphology for Molecularly Ordered Ethylene-Bridged Periodic Mesoporous Organosilica

Xia

Mokaya

2006

J. Phys. Chem. B

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A series of ethylene-containing mesoporous organosilica materials were fabricated via surfactant-mediated assembly of 1,2-bis(triethoxysilyl)ethylene (BTEE) organosilica precursor using alkyltrimethylammonium bromide (CnTAB) surfactants with different alkyl chain length (n=12, 14, 16, 18) as supramolecular templates. The presence of molecularly ordered ethylene groups in the resulting periodic mesoporous organosilica (PMO) materials was confirmed by XRD data along with 29Si and 13C MAS NMR analysis. Additional characterization techniques, namely nitrogen sorption, TEM, and TGA, confirmed the structural ordering and thermal stability of the molecularly ordered ethylene-bridged PMOs. The PMOs exhibit molecular-scale ordering (with a periodicity of 5.6 A) within the organosilica framework and tunable pore size, which depending on the alkyl chain length of the surfactant templates, varied in the range 23-41 A. Furthermore, depending on the alkyl chain length of the templates, the particle morphology of the PMOs gradually changed from monodisperse spheres (for C12TAB) to rod or cakelike particles (for C14TAB) and elongated ropelike particles for longer chain surfactants. Variations in the surfactant chain length therefore allowed control of both the pore size and particle morphology without compromising molecular-scale or structural ordering. The reactivity of ethylene groups was probed by bromination, which demonstrated the potential for further functionalization of the PMOs.

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“…For example, Tang et al prepared mono-dispersed MSN though the assembly of those particles were disordered. 23 Yano et al reported the preparation of monodispersed colloidal MSNs with large size through the one-pot method, and fabricated colloidal crystals. 42,119 The diameter of these particles can be easily controlled by tuning the preparative conditions while maintaining their monodispersity.…”

Section: Preparation Of Monodispersed Colloidal Msnsmentioning

confidence: 99%

Colloidal Mesoporous Silica Nanoparticles

Yamamoto

Kuroda

2016

Bulletin of the Chemical Society of Japan

187

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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Synthesis of Artificial Opals with Uniform Mesoporous Silica Spheres

Cited by 12 publications

References 15 publications

Structural Control of Mesoporous Silica Nanoparticles in a Binary Surfactant System

Structural Control of Mesoporous Silica Nanoparticles in a Binary Surfactant System

Surfactant Mediated Control of Pore Size and Morphology for Molecularly Ordered Ethylene-Bridged Periodic Mesoporous Organosilica

Colloidal Mesoporous Silica Nanoparticles

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