One-pot synthesis of water-soluble and biocompatible superparamagnetic gadolinium-doped iron oxide nanoclusters

Abstract

The synthesis of superparamagnetic nanoclusters is critical for ultra-sensitive magnetic resonance imaging (MRI).

Dimpled SiO2@γ-Fe2O3 nanocomposites – fabrication and use for arsenic adsorption in aqueous medium

“…† According to previous research, 21 the modication of gold NPs with succinic anhydride would lead to the appearance of peaks at about 1650 and 1730 cm À1 , demonstrating the presence of carboxylic acid. 16 In our case, peaks with somewhat shied positions from the expected ones were noticed, at 1676 and 1767 cm À1 , respectively. These peaks can be assigned to the C]O amide stretching and C]O stretching of the carboxylic acid.…”

“… 17 Furthermore, since the pH level can affect the ζ -potential value, its measurement in a range of different pH is typically used to identify the isoelectric point of the NPs. 16 In our NPs, the isoelectric point was at around pH 6.5. From the Fig.…”

“…The latter peak is assigned to the –OH stretching of citrate. 16 The ζ -potential of the particles was also measured, in order to evaluate the degree of the colloidal dispersion stability. Normally, for a highly stable dispersion, the ζ -potential should be around ± 30 mV or over.…”

“…S4b †), with peaks at 805, 1090, 1265 and 2923 cm À1 for the modied NPs. In particular, the peak at 2923 cm À1 can be assigned to the bending vibrations of C-H. 16 Table S1 † contains a list of the standard APS peaks. Moreover, by comparing the FTIR spectra of Fig.…”

Facile synthesis of superparamagnetic nickel-doped iron oxide nanoparticles as high-performance T1 contrast agents for magnetic resonance imaging

“…Magnetic resonance imaging (MRI) has become one of the routinely used diagnostic tools in clinics due to its deep tissue penetration and high spatial resolution. 1–8 However, it faces the disadvantage of low sensitivity, and about 60% of patients need to use MRI contrast agents (CAs) to improve the contrast of the lesion area and surrounding tissues. CAs can be divided into T 1 and T 2 CAs according to the imaging principle.…”