نتایج جستجو برای: nickel nanocrystals

تعداد نتایج: 44239  

2010
J. Y. Hwang

Nanocrystals of hexagonal nickel carbide have been synthesized via physical vapor deposition of elemental nickel onto the surface of vertically aligned carbon nanotubes. Combining highresolution transmission electron microscopy (HRTEM) with three-dimensional atom probe tomography (3DAP) confirmed that these nanocrystals have a hexagonal structure, are enriched in carbon, and have a composition ...

Journal: :Nanoscale 2011
Weimo Zhu Lei Wang Rui Zhao Jiawen Ren Guanzhong Lu Yanqin Wang

The electromagnetic and microwave absorbing properties of nickel ferrite nanocrystals were investigated for the first time. There were two frequencies corresponding to the maximum reflection loss in a wide thickness range from 3.0 to 5.0 mm, which may be bought by the nanosize effect and the good crystallization of the nanocrystals.

Journal: :international journal of nano dimension 0
r. m. a. tehrani department of chemistry, shahre rey branch, islamic azad university, 18155-144, tehran, iran. m.r. allahgholi ghasri department of chemistry, shahre rey branch, islamic azad university, 18155-144, tehran, iran. f. bakhtiarzadeh department of chemistry, shahre rey branch, islamic azad university, 18155-144, tehran, iran. n. tafreshi department of chemistry, shahre rey branch, islamic azad university, 18155-144, tehran, iran. s. ab ghani pusat pengajian sains kimia, universiti sains malaysia, 11800 usm, pulau pinang, malaysia.

for the first time this study reported the success of using nanocrystalline hexagonal close-packed (hcp) nickel (ni) modified composite graphite (cg) electrode (hcp-nano ni/cg) for the electrocatalytic oxidation of glycerol in alkaline medium (0.1 m koh). the hcp-nano ni/cg electrode had an improve response and specificity on the electrocatalytic oxidation of glycerol over the bare cg. the elec...

Journal: :Chemical communications 2011
Magali Bonne Djamila Sellam Jean-Philippe Dacquin Adam Fraser Lee Karen Wilson Luca Olivi Andrea Cognigni Patrice Marécot Sébastien Royer Daniel Duprez

A simple and efficient route to prepare supported nanocrystalline oxides is presented. The synthesis procedure, i.e. in situ autocombustion of a glycine complex, allows the production of nanocrystals in a porous matrix presenting larger pore size. An example of successful formation of 2-5 nm nanocrystals is given for a single oxide (Fe(2)O(3)), a mixed-oxide structure (LaCoO(3) perovskite-type)...

Journal: :Nano letters 2013
Hyungsuk K D Kim Laura T Schelhas Scott Keller Joshua L Hockel Sarah H Tolbert Gregory P Carman

Here we demonstrate electric-field induced magnetic anisotropy in a multiferroic composite containing nickel nanocrystals strain coupled to a piezoelectric substrate. This system can be switched between a superparamagnetic state and a single-domain ferromagnetic state at room temperature. The nanocrystals show a shift in the blocking temperature of 40 K upon electric poling. We believe this is ...

Journal: :Nanoscale 2014
Qingsheng Liu Agustín Díaz Andrey Prosvirin Zhiping Luo James D Batteas

Two different nickel precursors (NiCl2 or Ni(CH3COCH2COCH3)2) in the presence of 1-dodecanethiol and a mixture of oleylamine and oleic acid were used for a one-pot colloidal synthesis to produce high purity Ni3S4 nanoparticles with controlled shapes in high yields and narrow size distributions. By simply changing the nickel precursors, the shape of Ni3S4 nanocrystals can be readily tuned from t...

Journal: :Physical chemistry chemical physics : PCCP 2017
Danilo Loche Claudia Marras Daniela Carta Maria Francesca Casula Gavin Mountjoy Anna Corrias

Samples of nickel cobaltite, a mixed oxide occurring in the spinel structure which is currently extensively investigated because of its prospective application as ferromagnetic, electrocatalytic, and cost-effective energy storage material were prepared in the form of nanocrystals stabilized in a highly porous silica aerogel and as unsupported nanoparticles. Nickel cobaltite nanocrystals with av...

2016
Heng Guo Bingxue Pu Haiyuan Chen Jin Yang Yajun Zhou Jian Yang Boateng Bismark Handong Li Xiaobin Niu

Pure metallic nickel submicron spheres (Ni-SSs), flower-like nickel nanoflakes, and hollow micrometer-sized nickel spheres/tubes were controllably synthesized by a facile and efficient one-step solvothermal method with no reducing agent. The characteristics of these nickel nanostructures include morphology, structure, and purification. Possible synthesis mechanisms were discussed in detail. The...

2011
Ning Zhan Mario Olmedo Guoping Wang Jianlin Liu

Graphene based flash memory was demonstrated by using nickel nanocrystals as storage nodes. As-grown graphene films were characterized by transmission electron microscopy and Raman spectroscopy to show good film quality. On/off operation of the transistor memory was acquired by static pulse response measurement. The memory window of the device was found up to be 23.1 V by back gate sweep. This ...

Journal: : 2023

It has been shown that hydrogen and oxygen atoms cannot be present in the open pores of crystal lattices base metals casting alloys. The solubility gases liquid alloys is a nanostructured process. Hydrogen melts are adsorbed by basic metal elemental nanocrystals. Nitrogen dissolves iron, nickel chromium not atomic form, but composition elementary nanocrystals nitride molecules. After deoxidatio...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید