scholarly journals High Quality Photoactive Cubic-Phase Copper Selenide Nanodiscs Show Promise for Photovoltaics

MRS Bulletin ◽  
2010 ◽  
Vol 35 (8) ◽  
pp. 564-565 ◽  
Author(s):  
Alia P. Schoen
Keyword(s):  
Copper Selenide ◽  
Cubic Phase ◽  
High Quality

scholarly journals Cubic InGaN Grown by MOCVD

1999 ◽  
Vol 4 (S1) ◽  
pp. 239-243
Author(s):  
J.B. Li ◽  
Hui Yang ◽  
L.X. Zheng ◽  
D.P. Xu ◽  
Y.T. Wang
Keyword(s):  
Room Temperature ◽  
Emission Peak ◽  
Buffer Layers ◽  
Cubic Phase ◽  
Yellow Luminescence ◽  
X Ray Diffraction ◽  
High Quality ◽  
X Ray ◽  
Cubic Gan ◽  
Pl Emission

We report on the growth of high-quality cubic phase InGaN on GaAs by MOCVD. The cubic InGaN layers are grown on cubic GaN buffer layers on GaAs (001) substrates. The surface morphology of the films are mirror-like. The cubic nature of the InGaN films is obtained by X-ray diffraction (XRD) measurements. The InGaN layers show strong photoluminescence (PL) at room temperature. Neither emission peak from wurtzite GaN nor yellow luminescence is observed in our films. The highest In content as determined by XRD is about 17% with an PL emission wavelength of 450 nm. The FWHM of the cubic InGaN PL peak are 153 meV and 216 meV for 427 nm and 450 nm emissions, respectively. It is found that the In compositions determined from XRD are not in agreement with those estimated from PL measurements. The reasons for this disagreement are discussed.

How to exploit ion-induced stress relaxation to grow thick c-BN films

2002 ◽  
Vol 74 (3) ◽  
pp. 489-492 ◽  
Author(s):  
P. Ziemann ◽  
H.-G. Boyen ◽  
N. Deyneka ◽  
P. Widmayer ◽  
F. Banhart
Keyword(s):  
Stress Relaxation ◽  
Compressive Stress ◽  
Ion Irradiation ◽  
Cubic Phase ◽  
Medium Energy ◽  
High Quality ◽  
Induced Stress

A recently developed procedure is reviewed allowing thick (>1 mm), high-quality c-BN films (>80 % c-BN) to be grown. It is based on the observation that compressive stress inevitably present in such films can be released by medium-energy (some hundred keV) ion irradiation without destroying the cubic phase.

Colloidal Synthesis of Cubic-Phase Copper Selenide Nanodiscs and Their Optoelectronic Properties

2010 ◽  
Vol 22 (12) ◽  
pp. 3586-3588 ◽  
Author(s):  
Jaewon Choi ◽  
Narae Kang ◽  
Hye Yun Yang ◽  
Hae Jin Kim ◽  
Seung Uk Son
Keyword(s):  
Copper Selenide ◽  
Optoelectronic Properties ◽  
Colloidal Synthesis ◽  
Cubic Phase

High-quality hybrid imaging with a cubic phase mask

2019 ◽  
Author(s):  
Jingsong Li ◽  
Ming Liu ◽  
Yuejin Zhao ◽  
Liquan Dong ◽  
Lingqin Kong ◽  
...  
Keyword(s):  
Hybrid Imaging ◽  
Phase Mask ◽  
Cubic Phase ◽  
High Quality

Generation of high quality Airy beams with blazed micro-optical cubic phase plates

2011 ◽  
Vol 50 (36) ◽  
pp. 6627 ◽  
Author(s):  
Jingang Wang ◽  
Jing Bu ◽  
Mingwei Wang ◽  
Yong Yang ◽  
Xiaocong Yuan
Keyword(s):  
Cubic Phase ◽  
High Quality ◽  
Phase Plates ◽  
Airy Beams

scholarly journals Rastering strategy for screening and centring of microcrystal samples of human membrane proteins with a sub-10 µm size X-ray synchrotron beam

2009 ◽  
Vol 6 (suppl_5) ◽  
Author(s):  
Vadim Cherezov ◽  
Michael A. Hanson ◽  
Mark T. Griffith ◽  
Mark C. Hilgart ◽  
Ruslan Sanishvili ◽  
...  
Keyword(s):  
Membrane Proteins ◽  
G Protein Coupled Receptors ◽  
Cubic Phase ◽  
High Quality ◽  
Crystal Sample ◽  
X Ray ◽  
Synchrotron Beam ◽  
Lipidic Cubic Phase ◽  
Diffraction Patterns ◽  
G Protein Coupled

Crystallization of human membrane proteins in lipidic cubic phase often results in very small but highly ordered crystals. Advent of the sub-10 µm minibeam at the APS GM/CA CAT has enabled the collection of high quality diffraction data from such microcrystals. Herein we describe the challenges and solutions related to growing, manipulating and collecting data from optically invisible microcrystals embedded in an opaque frozen in meso material. Of critical importance is the use of the intense and small synchrotron beam to raster through and locate the crystal sample in an efficient and reliable manner. The resulting diffraction patterns have a significant reduction in background, with strong intensity and improvement in diffraction resolution compared with larger beam sizes. Three high-resolution structures of human G protein-coupled receptors serve as evidence of the utility of these techniques that will likely be useful for future structural determination efforts. We anticipate that further innovations of the technologies applied to microcrystallography will enable the solving of structures of ever more challenging targets.

scholarly journals PIN–PMN–PT piezoelectric crystals with increased rhombohedral-to-tetragonal phase transition temperature

2014 ◽  
Vol 04 (01) ◽  
pp. 1450001 ◽  
Author(s):  
Jun Luo ◽  
Shujun Zhang ◽  
Wesley Hackenberger ◽  
Thomas R. Shrout
Keyword(s):  
Phase Transition ◽  
Tetragonal Phase ◽  
The Self ◽  
Cubic Phase ◽  
High Quality ◽  
Piezoelectric Crystals ◽  
Phase Transition Temperatures ◽  
Tetragonal Phase Transition

In this work, crystal growth and characterization of PIN–PMN–PT (29–59% PIN and 28–35% PT) were conducted to understand how PIN ratio in the PIN–PMN–PT system impacts its phase stability during crystallization. High-quality PIN–PMN–PT crystals with 36% PIN were obtained using the self-seeded Bridgman process, even though the cubic phase In 2 O 3 formed at the very beginning of solidification. The melt became more unstable when the PIN ratio in the PIN–PMN–PT system increased to 49% and above, which affected the composition and quality of the as-grown crystals significantly. By increasing the PIN to 36% in PIN–PMN–PT crystal, the rhombohedral-to-tetragonal phase transition temperatures and the coercive field reached 115–135°C and 4.5~5.6 kV/cm, respectively, that greatly expanded the operation domains compared to PMN–PT crystals.

Continuous cubic phase microplates for generating high-quality Airy beams with strong deflection

2017 ◽  
Vol 42 (13) ◽  
pp. 2483 ◽  
Author(s):  
Ze Cai ◽  
Ya Liu ◽  
Chenchu Zhang ◽  
Jiangchuan Xu ◽  
Shengyun Ji ◽  
...  
Keyword(s):  
Cubic Phase ◽  
High Quality ◽  
Airy Beams

Garnet-type Li7La3Zr2O12 Electrolyte Prepared by a Solution-Based Technique for Lithium ion battery

2012 ◽  
Vol 1440 ◽  
Author(s):  
Jiajia Tan ◽  
Ashutosh Tiwari
Keyword(s):  
Ionic Conductivity ◽  
Tetragonal Phase ◽  
Lithium Ion ◽  
Superior Performance ◽  
Cubic Phase ◽  
Lithium Metal ◽  
High Quality ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
The One

ABSTRACTHigh quality garnet-type Li7La3Zr2O12 solid electrolyte was synthesized using a solution-based technique. The electrolyte pellets were sintered at 900 oC, resulting in tetragonal phase, which then transformed to cubic phase after annealing at 1230 oC. The ionic conductivity of both phases was studied and revealed to be 3.67x10-7 S/cm and 1.67×10-4 S/cm, respectively. A proto-type cell comprising of Li7La3Zr2O12 electrolyte, LiCoO2 cathode and lithium metal anode was assembled. The cell made with the cubic phase electrolyte exhibited superior performance than the one made with the tetragonal phase electrolyte. The former cell possessed a very promising gravimetric discharge capacity of 3.4 mAh/g, which is the highest value obtained among similar setups.

scholarly journals Structure determination from lipidic cubic phase embedded microcrystals by MicroED

2019 ◽  
Author(s):  
Lan Zhu ◽  
Guanhong Bu ◽  
Liang Jing ◽  
Dan Shi ◽  
Tamir Gonen ◽  
...  
Keyword(s):  
High Resolution ◽  
Electron Diffraction ◽  
Structure Determination ◽  
Model System ◽  
Proteinase K ◽  
Electron Diffraction Data ◽  
Cubic Phase ◽  
High Quality ◽  
Small Crystals ◽  
Lipidic Cubic Phase

AbstractThe lipidic cubic phase (LCP) technique has proved to facilitate the growth of high-quality crystals that are otherwise difficult to grow by other methods. Because crystals grown in LCP can be limited in size, improved techniques for structure determination from these small crystals are important. Microcrystal electron diffraction (MicroED) is a technique that uses a cryo-TEM to collect electron diffraction data and determine high-resolution structures from very thin micro and nanocrystals. In this work, we have used modified LCP and MicroED protocols to analyze crystals embedded in LCP. Proteinase K in LCP was used as a model system, and several LCP sample preparation strategies were tested. Among these, treatment with 2-Methyl-2,4-pentanediol (MPD) and lipase were both able to reduce the viscosity of the LCP and produce quality cryo-EM grids with well-diffracting crystals. These results set the stage for the use of MicroED to analyze other microcrystalline samples grown in LCP.

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