in the present study, carbon species including organic carbon (oc), elemental carbon (ec), and water-soluble organic carbon (wsoc) concentration in pm2.5 were assessed at an urban site of tehran, iran during march to june 2014. the pm2.5 samples were collected using an frmomnitm ambient air sampler. thermal gravimetric analysis (tga) was used to analyze oc and ec. the results showed that pm2.5 ...

Issues concerning powder consolidation methods compatible with the colloidal approach and issues associated with other powder processing steps, viz., den-sification and microstructural control, are presented with regard to research directions leading to more reliable ceramics. 1. Introduction With their multiplicity of elemental combinations and crystal structures, ceramics exhibit unique prope...

In the first part of the talk, I will present our recent findings for the spin transport in 2D membranes including monolayer transition-metal dichalogonides and graphene [1]. I will focus on spin flips induced by flexural phonons (Fig. 1), and show that the spin relaxation is ultrafast for electrons in freestanding membranes while being mitigated in supported membranes. This behavior is univers...

In this manuscript, we extend on our prior work to show that under certain conditions cross-slip nucleation is athermal and spontaneous with zero activation energy in FCC elemental metals such as Ni and Cu, and L12 intermetallic compounds such as Ni3Al. Using atomistic simulations (molecular statics), we show that spontaneous cross-slip occurs at mildly repulsive intersections. Further, the loc...

Cr(III), Mn(II), Fe(III), Co(II) and Ni(II) complexes of N-(2-nitro)-benzilidene-3-hydrazino benzoxazine-2-one (NBHBO) have been synthesized and characterized by elemental analysis, conductance, thermal, spectral and magnetic data. NBHBO acts as a bidentate NN donor towards trivalent and NO donor towards divalent metal ions. Octahedral geometries have been proposed for all the Complexes. The li...