Reply to ‘Comment on “Zero-thermal-quenching and photoluminescence tuning with the assistance of carriers from defect cluster traps”’

2020 ◽  
Vol 8 (3) ◽  
pp. 1153-1156
Author(s):  
Yali Chen ◽  
Binxun Yu ◽  
Jing Gou ◽  
Shengzhong Frank Liu
Keyword(s):  
Thermal Quenching ◽  
Vital Role ◽  
Defect Cluster ◽  
Zinc Vacancy ◽  
Vacancy Defects ◽  
Photoluminescence Behavior

In this response to the comments on our article, a series of Sr8Zn1−xSc(PO4)7:12%Tb3+ (SZ1−xSPO:12%Tb3+) phosphors were synthesized, and their photoluminescence behavior confirmed that zinc vacancy defects play a vital role in the SZ1−xSPO:12%Tb3+ phosphor.

Anti‐Thermal‐Quenching Bi 3+ Luminescence in a Cyan‐Emitting Ba 2 ZnGe 2 O 7 :Bi Phosphor Based on Zinc Vacancy

2020 ◽  
pp. 2000048
Author(s):  
Yi Wei ◽  
Hang Yang ◽  
Zhiyu Gao ◽  
Xiaohan Yun ◽  
Gongcheng Xing ◽  
...  
Keyword(s):  
Thermal Quenching ◽  
Zinc Vacancy

scholarly journals Compressive Behavior of Carbon Nanotube Reinforced Polypropylene Composites Under High Strain Rate: Insights From Molecular Dynamics

2021 ◽  
Author(s):  
Brijesh Mishra ◽  
Sumit Sharma
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Strain Rate ◽  
Compressive Strain ◽  
Md Simulations ◽  
Vital Role ◽  
Key Factors ◽  
Single Walled Carbon Nanotube ◽  
Vacancy Defects ◽  
Polypropylene Composites

Abstract Since the discovery of carbon nanotubes (CNTs), these have received a lot of attention because of their unusual mechanical electrical properties. Strain rate is one of the key factors that play a vital role in enhancing the mechanical properties of nanocomposites. In this study, (4, 4) armchair single-walled carbon nanotube (SWCNT) was employed with the polymer matrix as polypropylene (PP). The influence of compressive strain rate on SWCNT/PP nanocomposites was evaluated using MD simulations, and mechanical properties have been predicted. Stone-Wales (SW) and vacancy defects, were integrated on the SWCNT. The maximum Young’s modulus (E) of 81.501 GPa was found for the pristine SWCNT/PP composite for a strain rate of 1010 s-1. The least value of E was 45.073GPa for 6% SW defective/PP composite for a strain rate of 108 s-1. While the 6% vacancy defective CNT/PP composite showed the lowest value of E as 39.57GPa for strain rate 108 s-1. It was found that the mechanical properties of SWCNT/PP nanocomposites decrease with the increase in percent defect. It was also seen that the mechanical properties were enhanced with the increment in the applied strain rate. The results obtained from this study could be useful for the researchers designing PP-based materials for compression loading to be used for biomedical applications.

scholarly journals Correction: Zero-thermal-quenching and photoluminescence tuning with the assistance of carriers from defect cluster traps

2019 ◽  
Vol 7 (35) ◽  
pp. 11040-11040 ◽  
Author(s):  
Yali Chen ◽  
Binxun Yu ◽  
Jing Gou ◽  
Shengzhong Frank Liu
Keyword(s):  
Thermal Quenching ◽  
Defect Cluster

Correction for ‘Zero-thermal-quenching and photoluminescence tuning with the assistance of carriers from defect cluster traps’ by Yali Chen et al., J. Mater. Chem. C, 2018, 6, 10687–10692.

Comment on “Zero-thermal-quenching and photoluminescence tuning with assistance of carriers from defect cluster traps” by Chen et al., J. Mater. Chem. C, 2018, 6, 10687–10692

2020 ◽  
Vol 8 (3) ◽  
pp. 1151-1152
Author(s):  
Yu Xiao ◽  
Zhendong Hao
Keyword(s):  
Thermal Quenching ◽  
Intrinsic Property ◽  
Defect Cluster

Chen et al. (J. Mater. Chem. C, 2018, 6, 10687–10692) reported that the zero-thermal-quenching behavior of Tb3+ was the compensation of different trap depths. In this comment, we argue that this unique behavior is just an intrinsic property of Tb3+.

scholarly journals Role of Defects on Electronic Properties in Various Mono Layer Transition Metal Dichalcogenides

2021 ◽  
Author(s):  
Ravinder Pawar
Keyword(s):  
Transition Metal ◽  
Band Gap ◽  
Density Functional ◽  
Transition Metal Dichalcogenides ◽  
Impurity Band ◽  
Vital Role ◽  
Layer Transition ◽  
Vacancy Defects ◽  
Metal Dichalcogenides ◽  
Indirect Band Gap

The chalcogen vacancy defects in various transition metal dichalcogenides (TMDCs) have been studied using density functional theory (DFT) calculation. Results reveal that (i) the dissociation energy value depends on both nature of chalcogen and transition metal, (ii) the work function depends marginally on the single or double vacancies, (iii) the defect transforms direct band gap to indirect band gap materials (i.e. the pristine materials show KVKC transition whereas defective materials show ΓVKC) and (iii) the d-orbital of the transition metal plays a vital role in the formation of impurity band.

Zero-thermal-quenching and photoluminescence tuning with the assistance of carriers from defect cluster traps

2018 ◽  
Vol 6 (40) ◽  
pp. 10687-10692 ◽  
Author(s):  
Yali Chen ◽  
Binxun Yu ◽  
Jing Gou ◽  
Shengzhong Frank Liu
Keyword(s):  
High Temperature ◽  
Thermal Quenching ◽  
Defect Cluster

The zero-thermal-quenching behavior at high temperature up to 225 °C was benefited from the carriers captured by deeper traps, which can be verified by thermoluminescence spectra.

Ultrastructure of Lymphatic Capillaries in the Transport of Colloidal Particles

1967 ◽  
Vol 25 ◽  
pp. 186-187
Author(s):  
L. V. Leak ◽  
J. F. Burke
Keyword(s):  
Connective Tissue ◽  
Colloidal Particles ◽  
Ultrastructural Level ◽  
Vital Role ◽  
Time Intervals ◽  
Thorium Dioxide ◽  
Lymphatic Capillary ◽  
Tissue Area ◽  
Rapid Removal ◽  
Tissue Fluids

The vital role played by the lymphatic capillaries in the transfer of tissue fluids and particulate materials from the connective tissue area can be demonstrated by the rapid removal of injected vital dyes into the tissue areas. In order to ascertain the mechanisms involved in the transfer of substances from the connective tissue area at the ultrastructural level, we have injected colloidal particles of varying sizes which range from 80 A up to 900-mμ. These colloidal particles (colloidal ferritin 80-100A, thorium dioxide 100-200 A, biological carbon 200-300 and latex spheres 900-mμ) are injected directly into the interstitial spaces of the connective tissue with glass micro-needles mounted in a modified Chambers micromanipulator. The progress of the particles from the interstitial space into the lymphatic capillary lumen is followed by observing tissues from animals (skin of the guinea pig ear) that were injected at various time intervals ranging from 5 minutes up to 6 months.

Three-Dimensional reconstruction of isolated centrosomes by automated electron tomography

1994 ◽  
Vol 52 ◽  
pp. 310-311
Author(s):  
M.B. Braunfeld ◽  
M. Moritz ◽  
B.M. Alberts ◽  
J.W. Sedat ◽  
D.A. Agard
Keyword(s):  
Electron Tomography ◽  
Three Dimensional ◽  
Vital Role ◽  
Complex Nature ◽  
Animal Cells ◽  
Microtubule Organizing Center ◽  
Nucleation Sites ◽  
Dimensional Reconstruction ◽  
Organizing Center ◽  
Resolution Model

In animal cells, the centrosome functions as the primary microtubule organizing center (MTOC). As such the centrosome plays a vital role in determining a cell's shape, migration, and perhaps most importantly, its division. Despite the obvious importance of this organelle little is known about centrosomal regulation, duplication, or how it nucleates microtubules. Furthermore, no high resolution model for centrosomal structure exists.We have used automated electron tomography, and reconstruction techniques in an attempt to better understand the complex nature of the centrosome. Additionally we hope to identify nucleation sites for microtubule growth.Centrosomes were isolated from early Drosophila embryos. Briefly, after large organelles and debris from homogenized embryos were pelleted, the resulting supernatant was separated on a sucrose velocity gradient. Fractions were collected and assayed for centrosome-mediated microtubule -nucleating activity by incubating with fluorescently-labeled tubulin subunits. The resulting microtubule asters were then spun onto coverslips and viewed by fluorescence microscopy.

Asiana Airlines Flight 214

2014 ◽  
Vol 4 (2) ◽  
pp. 113-121 ◽  
Author(s):  
Stephanie Chow ◽  
Stephen Yortsos ◽  
Najmedin Meshkati
Keyword(s):  
Human Factors ◽  
Aviation Safety ◽  
Cultural Factors ◽  
Vital Role ◽  
Cultural Issues ◽  
Flight Crew ◽  
Pilot Performance ◽  
Engineering Designs ◽  
Flight Deck

This article focuses on a major human factors–related issue that includes the undeniable role of cultural factors and cockpit automation and their serious impact on flight crew performance, communication, and aviation safety. The report concentrates on the flight crew performance of the Boeing 777–Asiana Airlines Flight 214 accident, by exploring issues concerning mode confusion and autothrottle systems. It also further reviews the vital role of cultural factors in aviation safety and provides a brief overview of past, related accidents. Automation progressions have been created in an attempt to design an error-free flight deck. However, to do that, the pilot must still thoroughly understand every component of the flight deck – most importantly, the automation. Otherwise, if pilots are not completely competent in terms of their automation, the slightest errors can lead to fatal accidents. As seen in the case of Asiana Flight 214, even though engineering designs and pilot training have greatly evolved over the years, there are many cultural, design, and communication factors that affect pilot performance. It is concluded that aviation systems designers, in cooperation with pilots and regulatory bodies, should lead the strategic effort of systematically addressing the serious issues of cockpit automation, human factors, and cultural issues, including their interactions, which will certainly lead to better solutions for safer flights.

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