Characteristic Aspects of Formation of New Particles during the Growth of Monosize Silica Seeds

Chen, Shengli; Dong, Peng; Yang, Guanghua; Yang, Jiujin

doi:10.1006/jcis.1996.0295

Cited by 116 publications

(92 citation statements)

References 4 publications

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“…The synthesis of seeds other experiment was carried out, without the formation of new than Ludox AS-40 was done using the procedure described particles, under the conditions presented in Table 1. The in the literature (8) with time.…”

Section: Resultsmentioning

confidence: 97%

“…The Ludox AS-40 was purchased from Du Pont, with SiO 2 conIn seeded growth experiments, if the number density (or tent 41.8%, average diameter of SiO 2 33.2 nm, and relative total external surface area) of seeds exceeds some value, standard deviation of diameter 15%. TEOS and dehydrated new particles will not be formed, otherwise, new particles ethanol were distilled before use; other chemicals were used will be formed (8). Using Ludox AS-40 and monosize silica as received.…”

Section: Resultsmentioning

confidence: 99%

“…In seeding growth experiments, however, it was tetraethylorthosilicate (TEOS) in a mixture of alcohol, wa-found that the characteristic features of formation of new ter, and ammonia, many studies have been made on this particles during the growth of monosize silica seed were reaction system (2-4). Some mechanisms have been pro-consistent with the diffusion-limited growth mechanism (8), posed to account for the process, but no mechanism is able so the size dependence of growth rate was further investito explain all experimental findings. The mechanism of the gated in this paper to clarify the growth mechanism.…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

The Size Dependence of Growth Rate of Monodisperse Silica Particles from Tetraalkoxysilane

Chen

Dong

Yang

1997

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

The Size Dependence of Growth Rate of Monodisperse Silica Particles from Tetraalkoxysilane

Chen

Dong

Yang

1997

Journal of Colloid and Interface Science

Self Cite

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“…8. As can be observed, the three main absorption peaks appear at 466.25, 801.39, and 1095.90 cm -1 , which are related to rocking vibrations of the O-Si-O band [27], bending vibrations of the Si-O band, and antisymmetric stretching vibrations of the Si-O-Si band, respectively [29]. Also, the absorption peak at 3460.20 cm -1 is due to the absorption of water and the peak at 1629.78 cm -1 belongs to the OH bending vibration.…”

Section: Characterization Of Silica Nanoparticlesmentioning

confidence: 91%

Synthesis of Silica Nanoparticles by Ultrasound‐Assisted Sol‐Gel Method: Optimized by Taguchi Robust Design

Edrissi¹,

Soleymani²,

Adinehnia³

2011

Chem Eng & Technol

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Silica nanoparticles were prepared by ultrasound-assisted and conventional solgel method. The synthesis procedures were designed and optimized by the Taguchi experimental design method. Molar concentrations of TEOS, H 2 O, NH 4 OH, and reaction temperature were chosen as main factors. The results showed that the molar concentration of ammonia is the main factor which affects the particle size of the silica nanoparticles. The chemical structure, size, and morphology of the product were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, laser light scattering, and scanning electron microscopy. By the optimum conditions of the ultrasound-assisted sol-gel method, silica nanoparticles with an average particle size of 13 nm were prepared.

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“…17,18) In our study, smart control of particle size was carried out by varying the active silicic acid volume added to the seed sol, with the other experimental parameters fixed. Table 3 showed the impact of different active silicic acid volume on the particle growth progress, with the rest of conditions identical: the concentration of seed sol B-3 with 6.0 mg/ml, agitation rate of 800 rpm, addition rate of 0.17 ml/min, reactive time and refluxing.…”

Section: Smart Size Control Of Monodisperse Sio 2 Nanoparticlesmentioning

confidence: 99%

Study on Controllable Preparation of Silica Nanoparticles with Multi-sizes and Their Size-dependent Cytotoxicity in Pheochromocytoma Cells and Human Embryonic Kidney Cells

Yuan¹,

Gao

Zhang³

et al. 2010

JOURNAL OF HEALTH SCIENCE

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High-tech products made by nano-materials are tightly connected to people's life. However environmental impacts and health effects of nanoparticles are widely getting attention. In this paper, we focused on the potential size-dependent cytotoxicity of nanomaterials. Silica (SiO 2 ) nanoparticles were used as model material. The ion exchange method and modified StÖber method were used to controllably prepare monodisperse uniform silica nanoparticles with six types of size (20, 50, 80, 140, 280 and 760 nm). And the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and cellular morphology were introduced to evaluate the effect of the six sizes SiO 2 nanoparticles on pheochromocytoma (PC12) and human embryonic kidney (HEK293) cells viability. The results indicated that nanosized-SiO 2 (20, 50 and 80 nm) caused more cell damage when compared with microsized-SiO 2 (140, 280 and 800 nm). IC 50 of 24 hr exposure in PC12 cells were 118.2 ± 7.3, 320.4 ± 9.8, and 380.7 ± 10.5 µg/ml, and in HEK293 cells were 80.2 ± 6.4, 140.3 ± 9.6 and 309.2 ± 11.3 µg/ml for 20, 50-and 80-nm SiO 2 particles, respectively. Additionally, the SiO 2 particles of the other three sizes over 80-nm had little influence on the cell viability at the concentrations below 2000 µg/ml for two cultured cells. The results suggested that the exposure of SiO 2 nanoparticles with different sizes leaded to cellular morphological modifications and apoptosis in a size-dependent manner. Further studies on the molecular mechanisms of apoptosis and the toxicity in vivo are necessary.

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Characteristic Aspects of Formation of New Particles during the Growth of Monosize Silica Seeds

Cited by 116 publications

References 4 publications

The Size Dependence of Growth Rate of Monodisperse Silica Particles from Tetraalkoxysilane

The Size Dependence of Growth Rate of Monodisperse Silica Particles from Tetraalkoxysilane

Synthesis of Silica Nanoparticles by Ultrasound‐Assisted Sol‐Gel Method: Optimized by Taguchi Robust Design

Study on Controllable Preparation of Silica Nanoparticles with Multi-sizes and Their Size-dependent Cytotoxicity in Pheochromocytoma Cells and Human Embryonic Kidney Cells

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