ニオブ酸、(化合物)オブ酸塩

English Journal

Utilizing dynamic annealing during ion implantation: synthesis of silver nanoparticles in crystalline lithium niobate.

Wolf S1, Rensberg J, Stöcker H, Abendroth B, Wesch W, Ronning C.Author information 1Institute of Solid State Physics, Friedrich Schiller University Jena, Max-Wien-Platz 1, D-07743 Jena, Germany.AbstractSilver nanoparticles (NPs) embedded in lithium niobate were fabricated via ion beam synthesis and are suitable for various plasmonic applications, e.g. enhancement of optical nonlinear effects. After room temperature silver implantation, annealing in the temperature range of 400-600 °C was performed in order to recrystallize the damaged lithium niobate surface layer. The shape of the silver NPs, their optical properties as well as the structural properties of their surrounding matrix have been analyzed for various annealing steps. TEM investigations show that annealing at 400 °C does not lead to recrystallization of the damaged lithium niobate. A recrystallization occurs upon increasing the annealing temperature to 500 or 600 °C, but simultaneously a second phase consisting of lithium triniobate forms. This is additionally supported by XRD measurements. By utilizing dynamic annealing, i.e. implanting silver at elevated temperatures of 400 °C, it is shown that the LiNbO3 matrix stays single crystalline during ion implantation and no LiNb3O8 is formed. This is additionally verified by comparing the positions of the surface plasmon resonances with calculations based on Mie's scattering theory.
Nanotechnology.Nanotechnology.2014 Apr 4;25(13):135611. doi: 10.1088/0957-4484/25/13/135611. Epub 2014 Mar 5.
Silver nanoparticles (NPs) embedded in lithium niobate were fabricated via ion beam synthesis and are suitable for various plasmonic applications, e.g. enhancement of optical nonlinear effects. After room temperature silver implantation, annealing in the temperature range of 400-600 °C was perfor
PMID 24598310

Ferroelectricity in antiferroelectric NaNbO3 crystal.

Tyunina M1, Dejneka A, Rytz D, Gregora I, Borodavka F, Vondracek M, Honolka J.Author information 1Microelectronics and Materials Physics Laboratories, University of Oulu, PO Box 4500, FI-90014 Oulun yliopisto, Finland. Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech Republic.AbstractSodium niobate (NaNbO3, or NNO) is known to be antiferroelectric at temperatures between 45 and 753 K. Here we show experimentally the presence of the ferroelectric phase at temperatures between 100 and 830 K in the NNO crystals obtained by top-seeded solution growth. The ferroelectric phase and new phase transitions are evidenced using a combination of thermo-optical studies by variable angle spectroscopic ellipsometry, Raman spectroscopy analysis, and photoelectron emission microscopy. The possibility for strain-induced ferroelectricity in NNO is suggested.
Journal of physics. Condensed matter : an Institute of Physics journal.J Phys Condens Matter.2014 Mar 26;26(12):125901. doi: 10.1088/0953-8984/26/12/125901. Epub 2014 Mar 4.
Sodium niobate (NaNbO3, or NNO) is known to be antiferroelectric at temperatures between 45 and 753 K. Here we show experimentally the presence of the ferroelectric phase at temperatures between 100 and 830 K in the NNO crystals obtained by top-seeded solution growth. The ferroelectric phase and n
PMID 24594846

Unprecedented catalytic performance in disordered nickel niobate through photo-synergistic promotion.

Su Y1, Xin X, Wang Y, Wang T, Wang X.Author information 1College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P. R. China. wang_xiao_jing@hotmail.com.AbstractA novel catalyst was successfully prepared, which shows superior catalytic activity and stability toward reduction of 4-nitrophenol due to a unique photo-synergistic catalytic mechanism that relies on a synergy between thermal active sites and photogenerated electrons in NiNb2O6 nanoparticles.
Chemical communications (Cambridge, England).Chem Commun (Camb).2014 Mar 13. [Epub ahead of print]
A novel catalyst was successfully prepared, which shows superior catalytic activity and stability toward reduction of 4-nitrophenol due to a unique photo-synergistic catalytic mechanism that relies on a synergy between thermal active sites and photogenerated electrons in NiNb2O6 nanoparticles.
PMID 24626389

Japanese Journal

Hydrothermal formation of luminescent nanoparticles based on zirconia and europium niobate (Feature : Ceramics Processing through Energy Consumption Reduction (Green Processing))

HIRANO Masanori,DOZONO Hayato
Journal of the Ceramic Society of Japan = 日本セラミックス協会学術論文誌 121(1409), 113-115, 2013-01
NAID 40019536415

レーザーディスプレイ用分極反転波長変換レーザー (特集新展開を見せる分極反転光デバイス研究)

柳澤隆行
オプトロニクス 31(11), 135-138, 2012-11
NAID 40019485546

Room-Temperature Magnetocapacitance in Fe-Doped K0.5Na0.5Nb0.95Ta0.05O3 Ceramics

Li Huan,Yang Wenlong,Li Yu,Meng Qingxin,Zhou Zhongxiang
Applied Physics Express 5(10), 101501-101501-3, 2012-10-25
… Ferroelectric and magnetic properties of Fe-doped potassium--sodium tantalate niobate (K0.5Na0.5(Nb0.95Ta0.05)1-xFexO3-x; …
NAID 150000106038