Zwitterionic betaine-cholesterol system: Effects of sonication duration and aging on vesicles stability

Alenaizi, R.; Radiman, Shahidan; Rahman, Irman Abdul; Mohamed, Faizal K.P. Kunchi

doi:10.1016/j.colsurfa.2015.07.009

Cited by 4 publications

(4 citation statements)

References 37 publications

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“…For consistency, 5 min of sonication time was used throughout. A similar peak narrowing phenomena was observed in vesicle assemblies formed by cholesterol and zwitterionic surfactants. , Over time, the distribution narrows as the quatsomes return to a thermodynamically stable size range, as expected for stable vesicular assemblies …”

Section: Resultssupporting

confidence: 66%

“…A similar peak narrowing phenomena was observed in vesicle assemblies formed by cholesterol and zwitterionic surfactants. 32,33 Over time the distribution narrows as the quatsomes return to a thermodynamically stable size range, as expected for stable vesicular assemblies. 34 The stability of the quatsome-Si nanocrystal assemblies was also tested after dilution.…”

Section: Gold Nanocrystal Synthesismentioning

confidence: 77%

“…Gold nanocrystals were synthesized using the procedures described in Rasch, et al 14 33 mg of gold (III) chloride trihydrate was dissolved in 20 mL of deionized water. A separate solution of 6 g of TOAB dissolved in 80 mL toluene was prepared.…”

Section: Gold Nanocrystal Synthesismentioning

confidence: 99%

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Highly Fluorescent Silicon Nanocrystals Stabilized in Water Using Quatsomes

et al. 2017

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Fluorescent silicon (Si) nanocrystals (2.8 nm diameter) were incorporated into surfactant assemblies of cetyltrimethylammonium bromide (CTAB) and cholesterol, called quatsomes. In water, the quatsome-Si nanocrystal assemblies remain fluorescent and well-dispersed for weeks. In contrast to Si nanocrystals, alkanethiol-capped gold (Au) nanocrystals do not form stable dispersions in water with quatsomes. Cryogenic transmission electron microscopy (cryo-TEM) confirmed that the Si nanocrystal-quatsome structures do not change over the course of several weeks. The long-term stability of the Si nanocrystal-quatsome assemblies, their fluorescence, and biocompatibility makes them attractive candidates for medical applications.

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Section: Resultssupporting

confidence: 66%

Section: Gold Nanocrystal Synthesismentioning

confidence: 77%

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Highly Fluorescent Silicon Nanocrystals Stabilized in Water Using Quatsomes

et al. 2017

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“…Moreover, the particle size and the size distribution of the specimens were measured utilizing a Zetasizer Nano ZS instrument (Malvern Instruments, Malvern, UK) which was equipped with a 4 mW He-Ne laser [ 59 ]. The intensity-averaged particle diameters and the polydispersity index (PDI) values (an estimate of the distribution width) were calculated from the cumulate analysis, as defined in the ISO 13321 (International Organization for Standardization) [ 60 ].…”

Section: Methodsmentioning

confidence: 99%

Simulation and Synthesis of Cobalt (Co) Nanoparticles by Gamma Radiation Technique

et al. 2023

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Cobalt nanoparticles were synthesized using the gamma radiolytic technique, and the particle size was found to be reduced from 12±1 to 7±1 nm by increasing the dose from 10 to 60 kGy. The UV-visible absorption spectra were measured and exhibited a steady absorption maxima at 517 nm in the UV region, which blue-shifted toward a lower wavelength with a decrease in particle size. By taking the conduction electrons of an isolated particle that are not entirely free but are instead bound to their respective quantum levels, the optical absorption of the cobalt nanoparticles can be calculated and simulated via intra-band quantum excitation for particle sizes comparable to the measured ones. We found that the simulated absorption maxima of electronic excitations corresponded to the measured absorption maxima. Moreover, the structural characterizations were performed utilizing dynamic light scattering (DLS), transmission electron microscopy (TEM), and X-ray diffraction (XRD).

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