Substitutional effect of Mg2+ on structural and magnetic properties of cobalt nanoferrite

Preparation and structural investigation of Polyethylene glycol (PEG) / nano-ferrite composites

“…the grain boundary), whereas the TEM records the size of the whole particle ( i.e. grain and grain boundary) [19] Also, the X-ray density D x is seen to be directly proportional to the molecular weight in the same table, in spite of the existence of (a) 3 in the denominator of the mathematical formula of D x according to:   which means that the effect of the molecular weight (in the numerator) on the theoretical density value is greater than the effect of the lattice parameter. The observed X-ray density (D x ) have quite reasonable values in agreement with literature [12,20].…”

“…The lattice constant a (Å), average particle size from XRD R (nm) and from TEM images R TEM (nm), Porosity , measured density D (g/cm 3 ) and X-ray density D x (g/cm 3 ).…”

“…Ferrites are well known ferrimagnetic complex metal oxides characterized by high magnetic susceptibility and high electrical resistivity at the same time, but their properties may vary largely depending on the chemical formula, the method of synthesis, the amount of doping and/or the type of the substituted cations, and also very strongly on the particle size [1][2][3][4][5] Pure ferrites are heavy brittle ceramics and may not be suitable for some applications requiring light weight, malleability and flexibility. Therefore, more suitable candidates for such applications may be polymer composites containing ferrite particles instead of pure ferrites in order to decrease the weight of the materials and to increase their malleability and/or flexibility.…”

Study of the Synthesis and Application of a Fluorescence‐Enhanced Mg2+ Probe

“…In 2019, Zhi‐Gang Wang et al. synthesized a new colorimetric and switching fluorescent probe that can be used to detect Mg 2+ and Co 2+ in a phosphate buffer system [14–17] . However, there are relatively few types of existing magnesium ion probes, and the existing magnesium ion probes are basically of the fluorescence quenching type, which is less selective and less sensitive than the fluorescence‐enhanced magnesium ion probe.…”

“…In 2019, Zhi-Gang Wang et al synthesized a new colorimetric and switching fluorescent probe that can be used to detect Mg 2 + and Co 2 + in a phosphate buffer system. [14][15][16][17] However, there are relatively few types of existing magnesium ion probes, and the existing magnesium ion probes are basically of the fluorescence quenching type, which is less selective and less sensitive than the fluorescence-enhanced magnesium ion probe. Therefore, it is of great significance to develop a new type of high-selectivity, high-sensitivity, fluorescence-enhanced fluorescent probe molecule that can be used for the detection of magnesium ions in the environment.…”