Crystallographical characterization of nanocrystals PbS doped with Ni Javier Martínez-Juárez,a Oscar Portillo-Moreno,b Melissa ChávezPortillo,a Joel Díaz-Reyes,c Rosendo Lozada-Morales,d and Gabriel Juárez-Díaz,a aPosgrado en Dispositivos Semiconductores, Instituto de Ciencias, BUAP, Puebla, 14 Sur Esquina San Claudio, Ciudad Universitaria Edif. 103 C, C. P. 72570, (Mex). bFCQ, BUAP(Mex), cCIBA...

ABSTRACT The main objective of this work is to investigate the adsorption of Pyrrole 2-carboxylic acid (PCA) from O, N and C sites on the surface of pristine and Ni doped B12N12 nano cage by using density functional theory (DFT). The results of adsorption energy indicate that the adsorption of PCA on the surface of B12N12 and NiB11N12 is exoth...

A new class of dual metal and N doped carbon catalysts with well-defined porous structure derived from metal-organic frameworks (MOFs) has been developed as a high-performance electrocatalyst for oxygen reduction reaction (ORR). Furthermore, the microbial fuel cell (MFC) device based on the as-prepared Ni/Co and N codoped carbon as air cathode catalyst achieves a maximum power density of 4335.6...

Abstract Using first-principles calculations, we investigate the magnetic order in two-dimensional (2D) transition-metal-dichalcogenide (TMD) monolayers: MoS 2 , MoSe MoTe WSe and WS substitutionally doped with period four transition-metals (Ti, V, Cr, Mn, Fe, Co, Ni). We uncover five distinct magnetically ordered states among 35 TMD-dopant pairs: non-magnetic (NM), ferromagnetic out-of-plane s...

We investigate the electronic structure of nickelate superconductor NdNiO2 upon hole doping, by means density-functional theory and dynamical mean-field theory. demonstrate strong intrinsic hybridization between strongly correlated states formed Ni-3dx2-y2 orbital itinerant electrons due to Nd-5d Ni-3dz2 orbitals, producing a valence-fluctuating metal as normal state hole-doped NdNiO2. The Hund...

Ž . The ab-plane optical reflectance of single crystal of Bi Sr Ca Cu Ni O , for xs0.0215, has been measured 2 2 1yx x 2 8qd y1 Ž . from 80 to 40 000 cm 10 meV–5 eV and at temperatures between 20 and 300 K. Through Ni substitution, the optical conductivity shows a broad peak at about 400 cm, which grows in intensity and shifts to lower frequency as the temperature is reduced. We suggest that th...

A series of Sn1-xNixO2 films were fabricated by sol-gel method. All samples have pure rutile structure and exhibit room temperature ferromagnetism (RTFM). Magnetic moment per Ni ion decreases with the increase of Ni doping because antiferromagnetic super-exchange interaction takes place in the nearest neighbour Ni ions for the samples with high x. The results of the annealing at oxidizing and r...

The polycrystalline Sn added Ni-Zn ferrites were prepared using the conventional sintering method. The monophasic nature of the samples was characterized using X-rays. The elastic behavior has been measured in the temperature range 80-410oC using the composite oscillator method. The values of Young’s and shear modulus are corrected to theoretical density using the method of Mackenzie method. Th...

We have studied the magnetic excitations in impurity doped La1.85Sr0.15Cu1−yAyO4 (A=Ni or Zn) by neutron scattering. The dispersion for Zn:y = 0.017 is similar to that for the impurity free sample: incommensurate peaks with the incommensurability δ = 0.12 ± 0.01 (rlu) do not change their positions up to 21 meV. On the other hand, for Ni:y = 0.029, two incommensurate peaks observed at low energi...

Inelastic neutron scattering measurements on Ba(Fe0.963Ni0.037)2As2 manifest a neutron spin resonance in the superconducting state with anisotropic dispersion within the Fe layer. Whereas the resonance is sharply peaked at the antiferromagnetic (AFM) wave vector Q(AFM) along the orthorhombic a axis, the resonance disperses upwards away from Q(AFM) along the b axis. In contrast to the downward d...