Phase transition, size control and color tuning of NaREF4:Yb3+, Er3+ (RE = Y, Lu) nanocrystals

Nanoscale ◽  
2013 ◽  
Vol 5 (8) ◽  
pp. 3412 ◽  
Author(s):  
Jing Wang ◽  
Hongwei Song ◽  
Wen Xu ◽  
Biao Dong ◽  
Sai Xu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Size Control ◽  
Color Tuning

scholarly journals PREPARATION AND PARTICLE-SIZE CONTROL OF AMMONIUM POLYPHOSPHATE FORM II BY THE PHASE TRANSITION OF AMMONIUM POLYPHOSPHATE FORM I-I

1999 ◽  
Vol 9 (0) ◽  
pp. 91-96 ◽  
Author(s):  
MAKOTO WATANABE ◽  
YOSHINORI YAMAGUCHI ◽  
MAKOTO SAKURAI ◽  
HIROKAZU SUZUKI ◽  
MIOKO MAEDA
Keyword(s):  
Phase Transition ◽  
Particle Size ◽  
Size Control ◽  
Ammonium Polyphosphate ◽  
Particle Size Control

scholarly journals Effects of gel-liquid crystalline phase transition and cholesterol on size control of liposomes.

1987 ◽  
pp. 2194-2198 ◽  
Author(s):  
Tetsurou HANDA ◽  
Hirofumi TAKEUCHI ◽  
Hirokazu TAKAGI ◽  
Yuichi OHKUBO ◽  
Yoshiaki KAWASHIMA ◽  
...  
Keyword(s):  
Phase Transition ◽  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Size Control ◽  
Liquid Crystalline Phase ◽  
Crystalline Phase Transition

Temperature probing and emission color tuning by morphology and size control of upconvertingβ-NaYb0.67Gd0.30F4:Tm0.015:Ho0.015nanoparticles

2017 ◽  
Vol 5 (2) ◽  
pp. 024012 ◽  
Author(s):  
Emille M Rodrigues ◽  
Diogo A Gálico ◽  
Italo O Mazali ◽  
Fernando A Sigoli
Keyword(s):  
Size Control ◽  
Color Tuning ◽  
Emission Color

PREPARATION AND PARTICLE-SIZE CONTROL OF AMMONIUM POLYPHOSPHATE FORM II BY THE PHASE TRANSITION OF AMMONIUM POLYPHOSPHATE FORM I-II

1999 ◽  
Vol 9 (0) ◽  
pp. 97-102
Author(s):  
MAKOTO WATANABE ◽  
YOSHINORI YAMAGUCHI ◽  
MAKOTO SAKURAI ◽  
HIROKAZU SUZUKI ◽  
MIOKO MAEDA
Keyword(s):  
Phase Transition ◽  
Particle Size ◽  
Size Control ◽  
Ammonium Polyphosphate ◽  
Particle Size Control

scholarly journals Correction: Controlled size and morphology, and phase transition of YF3:Yb3+,Er3+ and YOF:Yb3+,Er3+ nanocrystals for fine color tuning

2016 ◽  
Vol 4 (3) ◽  
pp. 638-638 ◽  
Author(s):  
Yongsheng Zhu ◽  
Wen Xu ◽  
Shaobo Cui ◽  
Mao Liu ◽  
Cheng Lu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Color Tuning ◽  
Size And Morphology

Correction for ‘Controlled size and morphology, and phase transition of YF3:Yb3+,Er3+ and YOF:Yb3+,Er3+ nanocrystals for fine color tuning’ by Yongsheng Zhu et al., J. Mater. Chem. C, 2016, DOI: 10.1039/c5tc03473f.

Controlled size and morphology, and phase transition of YF3:Yb3+,Er3+ and YOF:Yb3+,Er3+ nanocrystals for fine color tuning

2016 ◽  
Vol 4 (2) ◽  
pp. 331-339 ◽  
Author(s):  
Yongsheng Zhu ◽  
Wen Xu ◽  
Shaobo Cui ◽  
Mao Liu ◽  
Cheng Lu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Rare Earth ◽  
Near Infrared ◽  
Visible Emission ◽  
Color Tuning ◽  
Wide Range ◽  
Upconversion Nanocrystals ◽  
Infrared Excitation ◽  
Size And Morphology

Rare-earth (RE) based fluoride and oxyfluoride upconversion nanocrystals (UCNCs) have the ability to generate multicolor visible emission as well as a wide range of applications under near-infrared excitation.

Interfacial studies in Nb3Sn superconductors

1991 ◽  
Vol 49 ◽  
pp. 590-591
Author(s):  
Ernest L. Hall ◽  
Lee E. Rumaner ◽  
Mark G. Benz
Keyword(s):  
Grain Size ◽  
Grain Boundaries ◽  
Flux Pinning ◽  
Size Control ◽  
High Magnetic Fields ◽  
Type Ii ◽  
Reaction Interface ◽  
Liquid Diffusion ◽  
Type Ii Superconductor ◽  
Grain Size Control

The intermetallic compound Nb3Sn is a type-II superconductor of interest because it has high values of critical current density Jc in high magnetic fields. One method of forming this compound involves diffusion of Sn into Nb foil containing small amounts of Zr and O. In order to maintain high values of Jc, it is important to keep the grain size in the Nb3Sn as small as possible, since the grain boundaries act as flux-pinning sites. It has been known for many years that Zr and O were essential to grain size control in this process. In previous work, we have shown that (a) the Sn is transported to the Nb3Sn/Nb interface by liquid diffusion along grain boundaries; (b) the Zr and O form small ZrO2 particles in the Nb3Sn grains; and (c) many very small Nb3Sn grains nucleate from a single Nb grain at the reaction interface. In this paper we report the results of detailed studies of the Nb3Sn/Nb3Sn, Nb3Sn/Nb, and Nb3Sn/ZrO2 interfaces.

Microstructure of laser-irradiated, conducting Kapton polyimide

1995 ◽  
Vol 53 ◽  
pp. 502-503
Author(s):  
D. L. Callahan ◽  
Z. Ball ◽  
H. M. Phillips ◽  
R. Sauerbrey
Keyword(s):  
Electron Microscopy ◽  
Phase Transition ◽  
Transmission Electron Microscopy ◽  
Cross Section ◽  
Film Surface ◽  
Cross Sectional ◽  
General Utility ◽  
Transmission Electron ◽  
Considerable Debate ◽  
Potential Applications

Ultraviolet laser-irradiation can be used to induce an insulator-to-conductor phase transition on the surface of Kapton polyimide. Such structures have potential applications as resistors or conductors for VLSI applications as well as general utility electrodes. Although the percolative nature of the phase transformation has been well-established, there has been little definitive work on the mechanism or extent of transformation. In particular, there has been considerable debate about whether or not the transition is primarily photothermal in nature, as we propose, or photochemical. In this study, cross-sectional optical microscopy and transmission electron microscopy are utilized to characterize the nature of microstructural changes associated with the laser-induced pyrolysis of polyimide.Laser-modified polyimide samples initially 12 μm thick were prepared in cross-section by standard ultramicrotomy. Resulting contraction in parallel to the film surface has led to distortions in apparent magnification. The scale bars shown are calibrated for the direction normal to the film surface only.

The structure of membranes and membrane proteins embedded in amorphous ice

1992 ◽  
Vol 50 (1) ◽  
pp. 432-433
Author(s):  
Uwe Lücken ◽  
Joachim Jäger
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Membrane Proteins ◽  
Phase Transition Temperature ◽  
Lipid Vesicles ◽  
Freezing Stress ◽  
Amorphous Ice ◽  
Different Temperatures ◽  
Band Pass ◽  
Lipid Polymorphism

TEM imaging of frozen-hydrated lipid vesicles has been done by several groups Thermotrophic and lyotrophic polymorphism has been reported. By using image processing, computer simulation and tilt experiments, we tried to learn about the influence of freezing-stress and defocus artifacts on the lipid polymorphism and fine structure of the bilayer profile. We show integrated membrane proteins do modulate the bilayer structure and the morphology of the vesicles.Phase transitions of DMPC vesicles were visualized after freezing under equilibrium conditions at different temperatures in a controlled-environment vitrification system. Below the main phase transition temperature of 24°C (Fig. 1), vesicles show a facetted appearance due to the quasicrystalline areas. A gradual increase in temperature leads to melting processes with different morphology in the bilayer profile. Far above the phase transition temperature the bilayer profile is still present. In the band-pass-filtered images (Fig. 2) no significant change in the width of the bilayer profile is visible.

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