نتایج جستجو برای: co doped

تعداد نتایج: 376975  

2016
Jianguo Zhang Xia Ji Jinsong Bao Xiaohu Zheng Maria Miritello

Silicon-doped (Si-doped) diamond films were deposited on a Co-cemented tungsten carbide (WC-Co) substrate using the hot filament chemical vapor deposition (HFCVD) method with a mixture of acetone, tetraethoxysilane (TEOS), and hydrogen as the recant source. The as-deposited doped diamond films were characterized with field emission scanning electron microscopy (FE-SEM), Raman spectrum, and X-ra...

2013
Min Zhang Xinluan Yu Dandan Lu Jianjun Yang

Zr/N co-doped TiO2 nanostructures were successfully synthesized using nanotubular titanic acid (NTA) as precursors by a facile wet chemical route and subsequent calcination. These Zr/N-doped TiO2 nanostructures made by NTA precursors show significantly enhanced visible light absorption and much higher photocatalytic performance than the Zr/N-doped P25 TiO2 nanoparticles. Impacts of Zr/N co-dopi...

2017
Sourov Chandra Yoshitake Masuda Naoto Shirahata Françoise M Winnik

Impurity-doping in nanocrystals significantly affects their electronic properties and diversifies their applications. Herein, we report the synthesis of transition metal (Mn, Ni, Co, Cu)-doped oleophilic silicon nanocrystals (SiNCs) through hydrolysis/polymerization of triethoxysilane with acidic aqueous metal salt solutions, followed by thermal disproportionation of the resulting gel into a do...

Journal: :Nanoscale research letters 2016
Xiao-Li Fan Yu-Rong An Wen-Jun Guo

Manipulating electronic and magnetic properties of two-dimensional (2D) transitional-metal dichalcogenides (TMDs) MX2 by doping has raised a lot of attention recently. By performing the first-principles calculations, we have investigated the structural, electronic, and magnetic properties of transitional metal (TM)-doped MoS2 at low and high impurity concentrations. Our calculation result indic...

سعیدی, علی, قاسمی, علی, گردانی, غلامرضا,

Nanoparticles of Mg–Co–Ti substituted strontium hexaferrite with nominal composition of SrFe12-2x(Mg,Co)0.5x TixO19 (x=0-2.5) were synthesized by a co-precipitation method. The structural, magnetic and electromagnetic properties of samples were studied as a function of x by thermal gravimetric (TG), X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample ma...

Co2+ & Er3+ co-doped ZnO nanocrystals were synthesized by the hydrothermal method at 180°C and pH= 12 for 48 h. Powder XRD patterns indicate that the Zn1-2xErxCoxO crystals (0.00<x≤0.035) are isostructural with ZnO. The cell parameters increase for Er3+ and Co2+ upon increasing the dopant content (x). SEM images show that doping of Er3+ and Co2+ into the sites of Zn2+ does not change the morpho...

Journal: :Chemical communications 2011
Zhen Li Ai Jun Du Qiao Sun Muhsen Aljada Li Na Cheng Mark J Riley Zhong Hua Zhu Zhen Xiang Cheng Xiao Lin Wang Jeremy Hall Elmars Krausz Shi Zhang Qiao Sean C Smith Gao Qing Max Lu

Co(2+)-doped CdSe colloidal nanowires with tunable size and dopant concentration have been prepared by a solution-liquid-solid (SLS) approach for the first time. These doped nanowires exhibit anomalous photoluminescence temperature dependence in comparison with undoped nanowires.

Journal: :Chemical communications 2015
Y Wang Y Nie W Ding S G Chen K Xiong X Q Qi Y Zhang J Wang Z D Wei

The Co nanoparticles encapsulated inside Co and nitrogen co-doped carbon catalysts with small particle size and homogenous distribution of Co NPs were elaborately synthesized, which exhibit evidently outstanding activity and stability toward ORR/HER.

2018
Pingyi Guo Yongbiao Lai Yong Shao Yu Zhang Hang Sun Yuxin Wang

To prevent Cr poisoning of the cathode and to retain high conductivity during solid oxide fuel cell (SOFC) operation, Cu or La doped Co-Mn coatings on a metallic interconnect is deposited and followed by oxidation at 750 ◦C. Microstructure and composition of coatings after preparation and oxidation is analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). High energy micro ...

2013
T. M. Libish George M Joseph

In this paper, the effects of temperature on the spectral profiles of long period grating (LPG) fabricated in BGe co doped photosensitive fiber is investigated. The results obtained show that LPG in a B–Ge co doped fiber has negative temperature response or opposite sign of the temperature dependence compared with LPG written in standard telecommunication fiber . Keywords— Fiber grating, Long P...

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