A study on the electrical, magnetic and optical limiting behaviour of Pure and Cd-Fe co-doped CuO NPs

Green hydrothermally synthesized ultrathin Mg-doped CuO nanoflakes: a structural, electrical and dielectric study

“…The semiconducting behavior of CuO has been studied by Sauda et al where the enhancement in the electrical conductivity was attributed to the increase in the hole concentration. The s-T plots of our samples fit the following relation (Arrhenius equation) well: 29 s dc = s 0 exp (ÀE dc /K B T) (7) where s 0 is the pre-exponential factor, (E dc ) represents the activation energy (which corresponds to the energy difference between the impurity level and the conduction level), and K B is the Boltzmann constant. The linearity of the ln(s dc ) vs. 1000/T plots (Fig.…”

“…At higher frequencies, the electrical conductivity increases with frequency (the dispersion region) where AC conductivity s ac dominates. 16,29 The plateau region expands with increasing T, indicating that the contribution of DC conduction becomes more dominant at the expense of the Ac conduction contribution with elevating the temperature, which can be attributed to the increase in the concentration of the free charge carriers. [69][70][71] Fig.…”

“…70 It is worth noting that the small activation energy values are evidence that the conduction is caused by the hopping process. 29 However, the existence of different activation energies E acl and E ach suggests that the hopping process occurs between two types of impurity levels in the band gap of the Cu 1Àx Mg x O NFs as the temperature varies.…”

“…CuO NSs with optimized structural, optical, and electronic properties have been used to construct a variety of devices, including electronic, optoelectronic, and magnetic devices, 6,7 photoelectrodes, 8 antibacterial, 9,10 gas sensors, 11,12 memory devices, 13 solar water-splitting, 14 photocatalysts, 15,16 solar cells, 17,18 water treatment, 19 supercapacitors, 20 and Li-ion batteries. [21][22][23] Many methods such as sol-gel, 10,[24][25][26] hydrothermal, 15,22,27,28 and precipitation methods, 7,16,29,30 exploding wire technique (EWT), 31 and solid-state reaction 32 have been used to synthesize CuO nanostructures with different morphologies. The hydrothermal technique is a commonly used method for nanomaterial preparation.…”

Influence of yttrium doping on the nonlinear optical limiting properties of cadmium molybdate nanostructures

“…An ideal optical limiter should possess high linear transmittance, high stability, and a low limiting threshold. [48][49][50][51] Fig. 8 shows optical limiting traces for the pure and yttrium doped CdMoO 4 .…”