Monodisperse mesoporous silica nanoparticles of distinct topology

Luo, Leilei; Liang, Yucang; Erichsen, Egil S.; Anwander, Reiner

doi:10.1016/j.jcis.2017.01.107

Cited by 30 publications

(16 citation statements)

References 101 publications

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“…Thirty-nine other papers on metal oxide nanoparticles that cite the 1950 model have been analyzed as summarized in Table S4 in the ESI † for the interested reader. In addition to the papers that have been discussed (vide supra), the following are included in Table S4 (ESI †): cobalt oxide, 233 copper oxide, 234,235 zirconia, 236 silica and titania, 104,[237][238][239][240][241][242][243] iron oxide, [244][245][246][247][248][249] indium oxide, 250 and a mathematical model. 251 In all of these reports save three exceptions, 233,237,238 the 1950 model is used to rationalize the observations, albeit in a ''words-only'' fashion.…”

Section: Formation Of Other Metal-oxide Nanoparticlesmentioning

confidence: 99%

LaMer's 1950 model of particle formation: a review and critical analysis of its classical nucleation and fluctuation theory basis, of competing models and mechanisms for phase-changes and particle formation, and then of its application to silver halide, semiconductor, metal, and metal-oxide nanoparticles

2021

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Section: Formation Of Other Metal-oxide Nanoparticlesmentioning

confidence: 99%

LaMer's 1950 model of particle formation: a review and critical analysis of its classical nucleation and fluctuation theory basis, of competing models and mechanisms for phase-changes and particle formation, and then of its application to silver halide, semiconductor, metal, and metal-oxide nanoparticles

2021

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“…Moreover, the broadness of the DLS peak characterized by PDI still maintains smaller stability values (Table S2), implying a good monodispersity. However, the particle sizes of DLS analysis of series M-MSMs are much larger than those of SEM images analysis, which is presumably due to an intense solvent effect . Hence, all of the evidence show that the monodisperse property of M-MSMs hardly changes by varying the CLDs of the S-CLPS templates.…”

Section: Resultsmentioning

confidence: 92%

Controllable Preparation of Monodisperse Mesoporous Silica from Microspheres to Microcapsules and Catalytic Loading of Au Nanoparticles

et al. 2020

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A unique structural transition from pomegranate-like monodisperse mesoporous silica microspheres (M-MSMs) with tunable mesopores to mesoporous silica microcapsules has been reported. The unique evolution occurred together with varying the cross-linking degrees (CLDs) of templates. Herein, using monodisperse sulfonated cross-linked polystyrene (S-CLPS) as templates, S-CLPS/ SiO 2 composite microspheres were synthesized by the sol−gel method. Subsequently, the templates were removed by calcination to obtain the M-MSMs or microcapsules. The pore sizes of M-MSMs could be tailored from 3.2 to 7.4 nm by facilely varying the CLDs from 0.5 to 20%. Interestingly, mesoporous silica microcapsules were gradually formed when the CLDs were beyond 20%. Meanwhile, the specific surface area also could be adjusted by this strategy without hardly affecting the monodispersity, and the specific surface area increased to 391.9 m 2 /g. Significantly, Au@M-MSM was prepared by supporting Au nanoparticles (NPs) on M-MSM and used as nanocatalysts to reduce 4-nitrophenol (4-NP). The ultrathin shell and interconnected three-dimensional (3D) porous structure of M-MSMs can increase the mass transfer and protect the Au NPs from leakage, which reveals high recyclability and high conversion (>95%) after 10 regeneration−catalysis cycles. This approach provides a nanotechnology platform for the preparation of mesoporous silica materials with different microstructures, which will have enormous potential in practical applications involving different molecular sizes.

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“…MSN5.4 and MSN4.8 presented a type IV adsorption-desorption isotherm of N 2 with an imminent type of HI hysteresis loop which are characteristic of mesopores in the form of independent thin cylindrical channels with a wide size distribution [ 28 , 49 ]. On the other hand, the increase in the amount of DMHA accompanied by the decrease in TEOS in the synthesis of MSN0.9 and MSN0.9’ led to a considerable decrease in pore diameter, pore volume and surface area, therefore both materials presented a characteristic behavior of microporous materials like a type I isotherm (<2 nm); this could be attributed to the fact that the TEOS in less quantity entered directly into the hydrophobic area of the CTAB micelles, preventing the DMHA from fulfilling its role as a mediator of the pore size, in addition, the excess DMHA is not transferred to the CTAB micelles if not to those of F127 resulting in obtaining microporous materials [ 35 , 50 ].…”

Section: Discussionmentioning

confidence: 99%

Adsorption of Recombinant Human β-Defensin 2 and Two Mutants on Mesoporous Silica Nanoparticles and Its Effect against Clavibacter michiganensis subsp. michiganensis

et al. 2021

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Solanum lycopersicum L. is affected among other pests and diseases, by the actinomycete Clavibacter michiganensis subsp. michiganensis (Cmm), causing important economic losses worldwide. Antimicrobial peptides (AMPs) are amphipathic cationic oligopeptides with which the development of pathogenic microorganisms has been inhibited. Therefore, in this study, we evaluate antimicrobial activity of mesoporous silica nanoparticles (MSN5.4) loaded with human β-defensin-2 (hβD2) and two mutants (TRX-hβD2-M and hβD2-M) against Cmm. hβD2, TRX-hβD2-M and hβD2-M presented a half-maximum inhibitory concentration (IC50) of 3.64, 1.56 and 6.17 μg/mL, respectively. MSNs had average particle sizes of 140 nm (SEM) and a tunable pore diameter of 4.8 up to 5.4 nm (BJH). AMPs were adsorbed more than 99% into MSN and a first release after 24 h was observed. The MSN loaded with the AMPs inhibited the growth of Cmm in solid and liquid media. It was also determined that MSNs protect AMPs from enzymatic degradation when the MSN/AMPs complexes were exposed to a pepsin treatment. An improved AMP performance was registered when it was adsorbed in the mesoporous matrix. The present study could expand the applications of MSNs loaded with AMPs as a biological control and provide new tools for the management of phytopathogenic microorganisms.

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Monodisperse mesoporous silica nanoparticles of distinct topology

Cited by 30 publications

References 101 publications

Controllable Preparation of Monodisperse Mesoporous Silica from Microspheres to Microcapsules and Catalytic Loading of Au Nanoparticles

Adsorption of Recombinant Human β-Defensin 2 and Two Mutants on Mesoporous Silica Nanoparticles and Its Effect against Clavibacter michiganensis subsp. michiganensis

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