scholarly journals Selective Effects of the Host Matrix in Hydrogenated InGaAsN Alloys: Toward an Integrated Matrix/Defect Engineering Paradigm

2021 ◽  
pp. 2108862
Author(s):  
Francesco Filippone ◽  
Saeed Younis ◽  
Giuseppe Mattioli ◽  
Marco Felici ◽  
Elena Blundo ◽  
...  
Keyword(s):  
Defect Engineering ◽  
Host Matrix ◽  
Selective Effects

Improved Sol-Gel Materials for Efficient Solid State Dye Lasers

1993 ◽  
Vol 329 ◽  
Author(s):  
Michael Canva ◽  
Patrick Georges ◽  
Jean-Fran^ois Perelgritz ◽  
Alain Brun ◽  
Fréddric Chaput ◽  
...  
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Room Temperature ◽  
Sol Gel ◽  
Tunable Lasers ◽  
Optical Quality ◽  
Dye Lasers ◽  
Laser Dyes ◽  
Host Matrix ◽  
Host Matrices

AbstractPhotoresistant laser dyes were trapped in silica based xerogel host matrices to obtain solid state tunable lasers. For this purpose very dense xerogel samples with improved chemical and physical properties were prepared at room temperature by the sol-gel technology. The as-prepared materials were polished to obtain optical quality surfaces and were used as new lasing media.Lasing action of such different dyes as rhodamine, perylene and pyrromethene doping dense sol-gel matrices was demonstrated. Efficiencies of 30 % or lifetimes of more than 100,000 shots were achieved with different new ≤dye dopant/host matrix≥ couples. Their different performances are reviewed and discussed.

Engineering Porosity Through Defects in a Giant Pore Metal–Organic Framework

2020 ◽  
Author(s):  
Adam Sapnik ◽  
Duncan Johnstone ◽  
Sean M. Collins ◽  
Giorgio Divitini ◽  
Alice Bumstead ◽  
...  
Keyword(s):  
Distribution Function ◽  
Ball Milling ◽  
Local Structure ◽  
Pair Distribution Function ◽  
Function Analysis ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Defect Engineering ◽  
Metal Organic ◽  
Unsaturated Metal Sites

<p>Defect engineering is a powerful tool that can be used to tailor the properties of metal–organic frameworks (MOFs). Here, we incorporate defects through ball milling to systematically vary the porosity of the giant pore MOF, MIL-100 (Fe). We show that milling leads to the breaking of metal–linker bonds, generating more coordinatively unsaturated metal sites, and ultimately causes amorphisation. Pair distribution function analysis shows the hierarchical local structure is partially</p><p>retained, even in the amorphised material. We find that the solvent toluene stabilises the MIL-100 (Fe) framework against collapse and leads to a substantial rentention of porosity over the non-stabilised material.</p>

Defect engineering in SiC technology for high-voltage power devices

2020 ◽  
Vol 13 (12) ◽  
pp. 120101
Author(s):  
Tsunenobu Kimoto ◽  
Heiji Watanabe
Keyword(s):  
High Voltage ◽  
Defect Engineering ◽  
Power Devices

Universal Approach toward Hysteresis-Free Perovskite Solar Cell via Defect Engineering

2018 ◽  
Vol 140 (4) ◽  
pp. 1358-1364 ◽  
Author(s):  
Dae-Yong Son ◽  
Seul-Gi Kim ◽  
Ja-Young Seo ◽  
Seon-Hee Lee ◽  
Hyunjung Shin ◽  
...  
Keyword(s):  
Solar Cell ◽  
Perovskite Solar Cell ◽  
Defect Engineering ◽  
Universal Approach

scholarly journals Selective effects of small barriers on river‐resident fish

2021 ◽  
Author(s):  
P.E. Jones ◽  
T. Champneys ◽  
J. Vevers ◽  
L. Börger ◽  
J.C. Svendsen ◽  
...  
Keyword(s):  
Resident Fish ◽  
Selective Effects

Defect engineering and characterization of active sites for efficient electrocatalysis

Nanoscale ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 3327-3345
Author(s):  
Xuecheng Yan ◽  
Linzhou Zhuang ◽  
Zhonghua Zhu ◽  
Xiangdong Yao
Keyword(s):  
Transition Metal ◽  
Active Sites ◽  
Defect Engineering ◽  
Metal Free

This review highlights recent advancements in defect engineering and characterization of both metal-free carbons and transition metal-based electrocatalysts.

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