Surface modification of oxidic nanoparticles using 3-methacryloxypropyltrimethoxysilane

Posthumus, Willem; Magusin, Pieter C. M. M.; Brokken-Zijp, Jcm José; Tinnemans, A.H.A.; Linde, van der R Rob

doi:10.1016/j.jcis.2003.07.008

Cited by 142 publications

(97 citation statements)

References 15 publications

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“…Without this surface modification the particles in the acrylate monomer agglomerate before, during, and after processing [2,12,15,22] and this agglomeration becomes visible by the naked eye during irradiation in our experiments. This agglomeration influences the surface area of the particles in contact with the liquid monomer, and quantitatively reproducible data were not obtained by us for the C=C bond disappearance rates when Sb : SnO 2 particles without MPS grafting were used in our experiments.…”

Section: Influence Of Mps Grafting and Mps Oligomersmentioning

confidence: 64%

“…In general, an S-shaped plot was found when the change in C=C bond concentration was plotted against t and always the R [15] were recorded with a Shimadzu UV 3102 PC Scanning Spectrophotometer, using a rectangular quartz cuvette with a diameter of 1 cm. X-ray photoelectron spectroscopy spectra (XPS) were measured as described before [13].…”

Section: Measurement Of the Polymerization Ratementioning

confidence: 99%

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Photocatalytic Properties of Tin Oxide and Antimony-Doped Tin Oxide Nanoparticles

Brokken-Zijp

Asselen

Kleinjan

et al. 2011

Journal of Nanotechnology

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For the first time it is shown that N-doped SnO 2 nanoparticles photocatalyze directly the polymerization of the C=C bonds of (meth)acrylates under visible light illumination. These radical polymerizations also occur when these particles are doped with Sb and when the surfaces of these particles are grafted with methacrylate (MPS) groups. During irradiation with visible or UV light the position and/or intensity of the plasmon band absorption of these nanoparticles are always changed, suggesting that the polymerization starts by the transfer of an electron from the conduction band of the particle to the (meth)acrylate C=C bond. By using illumination wavelengths with a very narrow band width we determined the influence of the incident wavelength of light, the Sb-and N-doping, and the methacrylate (MPS) surface grafting on the quantum efficiencies for the initiating radical formation (Φ) and on the polymer and particle network formation. The results are explained by describing the effects of Sb-doping, Ndoping, and/or methacrylate surface grafting on the band gaps, energy level distributions, and surface group reactivities of these nanoparticles. N-doped (MPS grafted) SnO 2 (Sb ≥ 0%) nanoparticles are new attractive photocatalysts under visible as well as UV illumination.

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Section: Influence Of Mps Grafting and Mps Oligomersmentioning

confidence: 64%

Section: Measurement Of the Polymerization Ratementioning

confidence: 99%

Photocatalytic Properties of Tin Oxide and Antimony-Doped Tin Oxide Nanoparticles

Brokken-Zijp

Asselen

Kleinjan

et al. 2011

Journal of Nanotechnology

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“…This peak was assigned to the Si-O-Si bonds that are present in MPS-IONP conjugates, but not in oleic acid IONPs. 21 In addition, carbon in the acrylate group (=CH 2 ) was also observed in the spectra …”

Section: Preparation Of Mps-ionpsmentioning

confidence: 95%

The effect of neutral-surface iron oxide nanoparticles on cellular uptake and signaling pathways

Kim¹,

Kim²,

Kim³

et al. 2016

IJN

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In recent years, iron oxide nanoparticles (IONPs) have been applied widely to biomedical fields. However, the relationship between the physicochemical properties of IONPs and their biological behavior is not fully understood yet. We prepared 3-methacryloxypropyltrimethoxysilane (MPS)-coated IONPs, which have a neutral hydrophobic surface, and compared their biological behavior to that of Resovist (ferucarbotran), a commercialized IONP formulation modified with carboxymethyl dextran. The rate of MPS-IONP uptake by human aortic endothelial cells (HAoECs) was higher than ferucarbotran uptake, indicating that the neutral hydrophobic nature of MPS-IONPs allowed them to be absorbed more readily through the plasma membrane. However, the signaling pathways activated by MPS-IONPs and ferucarbotran were comparable, suggesting that surface charge is not a key factor for inducing changes in HAoECs. In vivo fate analysis showed that MPS-IONPs accumulated for longer periods in tissues than hydrophilic ferucarbotran. These findings could enlarge our understanding of NP behavior for advanced applications in the biomedical field.

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“…The absorption band at 943 cm -1 belongs to -CH out-of-plane bending vibration of PEG (Zhang et al, 2002 (Yamaura et al, 2004). The vibration of the carbonyle bond is shifted from 1715 to 1695 cm -1 after grafting, since this bond is weakened by hydrogen bonds that are formed between carbonyl and surface hydroxy groups (Posthumus et al, 2004). The disappearance of the characteristic peaks for the ethoxy groups at 961 and 839 cm -1 shown in the spectrum of silanated m-PEG, indicates that hydrolysis …”

Section: Chemical Bonds In the Nanohybridsmentioning

confidence: 99%

Microwave synthesis of core-shell structured biocompatible magnetic nanohybrids in aqueous medium

Hu¹,

Percheron²,

Chaumont³

et al. 2011

Microwave Heating

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Surface modification of oxidic nanoparticles using 3-methacryloxypropyltrimethoxysilane

Cited by 142 publications

References 15 publications

Photocatalytic Properties of Tin Oxide and Antimony-Doped Tin Oxide Nanoparticles

Photocatalytic Properties of Tin Oxide and Antimony-Doped Tin Oxide Nanoparticles

The effect of neutral-surface iron oxide nanoparticles on cellular uptake and signaling pathways

Microwave synthesis of core-shell structured biocompatible magnetic nanohybrids in aqueous medium

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