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Doping Content (doping + content)

Distribution by Scientific Domains
Polymers and Materials Science75%

Selected Abstracts

Tunable Emission from Binary Organic One-Dimensional Nanomaterials: An Alternative Approach to White-Light Emission,

ADVANCED MATERIALS, Issue 1 2008
S. Zhao
Uniformly doped crystalline organic nanorods and nanowires are prepared by adsorbent-assisted physical vapor deposition. The emission color of the binary 1D nanomaterials can be controlled , and made to approach white light (see figure) , by changing the doping content, which is ascribed to intermolecular fluorescence resonance energy transfer between the two nanocrystalline components. [source]

Large Piezoelectric Coefficient in Tb-Doped BiFeO3 Films

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 4 2010
Xuemei Chen
Polycrystalline BiFeO3 and Bi1,xTbxFeO3 (BTFO) (x=0.05,0.16) thin films were deposited on indium tin oxide/glass substrates via a metal organic deposition method. The influence of Tb doping content on the structure and multiferroic properties was investigated. X-ray diffraction results reveal that there may exist a structure transition around x=0.11 in the BTFO system. Well-saturated and rectangular P,E hysteresis loops can be observed in all BTFO films. The BTFOx=0.11 film exhibits the maximum values of the remanent out-of-plane piezoelectric coefficient (d33=140 pm/V) and saturated magnetization (Ms=22.2 emu/cm3). [source]

Effect of La Doping on the Phase Conversion, Microstructure Change, and Electrical Properties of Bi2Fe4O9 Ceramics

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 11 2009
Ju Hong Miao
Undoped and La-doped Bi2Fe4O9 ceramics were synthesized using a soft chemical method. It is observed that in calcining La-doped Bi2Fe4O9, Bi(La)FeO3 phase rather than Bi2,xLaxFe4O9 gradually increases with increasing La doping content. The phase conversion from mullite-type structure of Bi2Fe4O9 to rhombohedrally distorted perovskite one of Bi(La)FeO3 with increasing La doping content indicates that La doping can stabilize the structure of BiFeO3. This is further evidenced that Bi2Fe4O9 can be directly converted to Bi(La)FeO3 by heating the mixtures of nominal composition of Bi2Fe4O9/xLa2O3. Furthermore, the microstructure changes and the room temperature hysteresis loops and leakage current for Bi2,xLaxFe4O9 with x=0 and 0.02 were characterized. [source]

Synthesis of III-nitride microcrystals using metal-EDTA complexes

PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 7 2007
Y. H. Liu
Abstract A novel method, using metal ethylenediamine tetraacetic acid (EDTA) complexes as starting materials, is proposed to synthesize III-nitride microcrystals. Ga (Zn, Ga)-EDTA·NH4 and In-EDTA·NH4 complexes were reacted with NH3 in the temperature range of 1020,1150 °C and 300,620 °C, respectively. SEM observation and X-ray diffraction patterns show that pure phase hexagonal GaN and InN are obtained. The CL peak intensity of GaN increases as the synthesis temperature increases up to 1100 °C. The dependence of CL peak intensity on Zn doping content indicates good doping control. For InN synthesis, the temperature window is very narrow and the reaction evolves from In2O3 to InN. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]