A randomly distributed gold nano-net is studied numerically via FDTD simulations. The dispersion of gold is implemented through a generalized dispersive material (GDM) model built on Padé approximants. The simulation of the dispersive random nano-net structure demands both fine nanoscale geometry and large span area in order to cover the complexity of interactions at the scattering surface. Alo...

We elucidate the crucial role of cetyl trimethylammonium bromide (CTAB) surfactant in anisotropic growth mechanism gold nano-bipyramids, nano-objects with remarkable optical properties and high tunability.

Abstract This paper aims to study a passivation technology and process of iron nanopowder, provides basic theory experimental data for promoting the practical application nanopowder as high-efficiency catalyst in production ammonia. There are two specific objectives. The first one is provide nanometal powder device prevent nano metal from being oxidized deactivated. second method using passivat...

diopside  has  been  successfully  prepared  by  a  modified  sol-gel method.optimization  in calcination temperature and mechanical ball milling  resulted  in  a  pure  and  nano-sized  powder  which characterized by means of scanning electron microscopy (sem), x-ray diffraction (xrd), transmission electron microscopy (tem) and fourier  transform  infrared  spectroscopy  (ft–ir). we  hypothesi...

Arrays of planar symmetric gold quadrumers consisting of a central nano-disc surrounded by three similar nano-discs belonging to the D(3h) point group were designed and fabricated. Since the geometrical configuration of quadrumers is the same as planar trigonal molecules, nano-discs can play the roles of artificial atoms to study the coupling trends among them. The plasmonic properties of the n...

Gold exhibits catalytic activity when it is in the form of fine particles having a size of less than 10 nm and is tightly supported on specific metal oxides such as TiO2, etc [1]. To reveal its mechanism, dynamic observation of the sample structures during the reaction by the transmission electron microscope (TEM) is quite essential. “Environmental-cell (E-cell) TEM” technique [2], which enable...

silica exists in rice husk, an agriculture waste, as a naturally occurring phase. in first step, acidic pre-treatment and calcination of the rice husk were performed to obtain nano-silica, in which various sizes of the nano-silica, totally with sizes under 80 nm, were achieved. second, to reduce nano-silica to elemental si and subsequently formation of the composite, mg used as the reducing age...

Two new neutral nano flower polymeric lead(II) coordination compounds, [Pb(tmph)(μ-SCN)₂]n (1) and [Pb(tmph)(μ-NO₃)₂]n (2), [tmph=3,4,7,8-tetramethyl-1,10-phenanthroline], have been synthesized by a sonochemical process and characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), FT-IR spectroscopy and elemental analyses. SEM image shows the nano flower morphology f...