Exploitation of Eu3+ red luminescence through order–disorder structural transitions in lanthanide stannate pyrochlores for warm white LED applications

2018 ◽  
Vol 20 (37) ◽  
pp. 24287-24299 ◽  
Author(s):  
T. S. Sreena ◽  
P. Prabhakar Rao ◽  
Athira K. V. Raj ◽  
T. R. Aju Thara
Keyword(s):  
Structural Transition ◽  
Type Structure ◽  
White Led ◽  
Structural Transitions ◽  
Fluorite Type ◽  
Red Luminescence

The structural transition from an ordered pyrochlore to a fluorite-type structure in Ln2.85YSnNbO10.5:0.15Eu3+ (Ln = La, Gd, Y, and Lu) provides a gateway for exploiting Eu3+ red luminescence for warm white LED applications.

Prediction of a novel 10-fold gold coordinated structure in AuIn2 above 10 GPa

2017 ◽  
Vol 19 (5) ◽  
pp. 3532-3537 ◽  
Author(s):  
P. Modak ◽  
Ashok K. Verma
Keyword(s):  
Structural Transition ◽  
Type Structure

AuIn2 undergoes a structural transition from the CaF2-type to Fe2B-type structure near 10 GPa.

Photoacids as a new fluorescence tool for tracking structural transitions of proteins: following the concentration-induced transition of bovine serum albumin

2015 ◽  
Vol 17 (47) ◽  
pp. 32023-32032 ◽  
Author(s):  
Nadav Amdursky
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Structural Transition ◽  
Low Ph ◽  
Special Focus ◽  
Structural Transitions

The concentration-induced structural transition of BSA at low pH was studied with photoacids. A special focus is also given to the discussion about the validity of other techniques to observe this transition.

Preparation and Properties of ferroelectric Bi2SrTa2O9 thin films for FeRAM using Flash-MOCVD

1995 ◽  
Vol 415 ◽  
Author(s):  
T. Ami ◽  
K. Hironaka ◽  
C. Isobel ◽  
N. Nagel ◽  
M. Sugiyama ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Coercive Field ◽  
Remanent Polarization ◽  
Ferroelectric Properties ◽  
Type Structure ◽  
Structural And Electrical Properties ◽  
Fluorite Type ◽  
Deposited Films ◽  
Flowing Oxygen

ABSTRACTFerroelectric Bi2 SrTa2 O9 thin films were successfully prepared by liquid delivery MOCVD, and structural and electrical properties were investigated. As-deposited films showed sharp distinct peaks, which were indexed assuming a fluorite-type structure. These precursors were transformed to bismuth-layered structures by annealing at 800 °C in flowing oxygen. Reasonable ferroelectric properties were observed in a film with 170 nm-thickness. Remanent polarization and coercive field were estimated to be 5.2 μC/cm2 and 52 kV/cm, respectively, at 5V.

Fluorite-related phases in the Bi-rich part of the Bi,Mo/O system

1997 ◽  
Vol 12 (1) ◽  
pp. 16-19 ◽  
Author(s):  
G. Spinolo ◽  
C. Tomasi
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Type Structure ◽  
Molar Ratio ◽  
Lattice Constants ◽  
Fluorite Type

Two compounds with compositions around n=14 and n∼5.4 (n=Bi/Mo molar ratio) have been prepared by solid-state reaction with five heating/grinding cycles at 800 °C. The lattice constants of both compounds can be related to the fluorite-type structure of δ-Bi2O3. Bi14MoO24 has been indexed as an orthorhombic pseudotetragonal (√2×√2×1) superstructure: a=7.812 (±0.005) Å, b=7.762 (±0.005) Å, c=5.7716 (±0.0007) Å (but a+b=15.5750±0.0020). For orthorhombic (3×5×3) Bi38Mo7O78: a=16.8236 (±0.0027) Å, b=28.6182 (±0.0045) Å, c=16.9082 (±0.0027) Å.

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