Negative thermal quenching of photoluminescence in annealed ZnO–Al2O3 core–shell nanorods

2015 ◽  
Vol 17 (7) ◽  
pp. 5360-5365 ◽  
Author(s):  
Yukun Wu ◽  
Junwen Li ◽  
Huaiyi Ding ◽  
Zhiwei Gao ◽  
Yiming Wu ◽  
...  
Keyword(s):  
Thermal Quenching ◽  
Annealing Process ◽  
Core Shell

Negative thermal quenching behavior of photoluminescence is observed in the annealed ZnO–Al2O3 core–shell nanorods, which is originated from the Al donor in ZnO induced through an annealing process.

Core–shell-structured nickel ferrite/onion-like carbon nanocapsules: an anode material with enhanced electrochemical performance for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (53) ◽  
pp. 42875-42880 ◽  
Author(s):  
Dandan Han ◽  
Gengxin Song ◽  
Bao Liu ◽  
He Yan
Keyword(s):  
Electrochemical Performance ◽  
Nickel Ferrite ◽  
Arc Discharge ◽  
Lithium Ion ◽  
Annealing Process ◽  
Core Shell ◽  
Carbon Nanocapsules ◽  
Discharge Method ◽  
Enhanced Electrochemical Performance ◽  
Nanoparticle Core

Core–shell-structured nanocapsules consisting of a nickel ferrite (NiFe2O4) nanoparticle core encapsulated in an onion-like carbon (C) shell are prepared by a modified arc-discharge method followed by an air-annealing process.

Enhancing negative thermal quenching effect via low-valence doping in two-dimensional confined core–shell upconversion nanocrystals

2018 ◽  
Vol 6 (43) ◽  
pp. 11587-11592 ◽  
Author(s):  
Lei Lei ◽  
Jienan Xia ◽  
Yao Cheng ◽  
Yuansheng Wang ◽  
Gongxun Bai ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Thermal Quenching ◽  
Core Shell ◽  
Two Dimensional ◽  
Quenching Effect ◽  
Upconversion Nanocrystals

Doping low-valence ions in core–shell NC is applied to improve negative thermal quenching effect. With the increase in temperature from 293 to 413 K, the UC emission intensity of 20Yb/2Er : NaGdF4 (12 nm) increases by 2.2 times, whereas that of NaGdF4@20Ca/20Yb/2Er: NaGdF4 (11 nm) increases by 10.9 times.

Core–shell structured CaS:Eu2+@CaZnOS via inward erosion growth to realize a super stable chalcogenide red phosphor

2019 ◽  
Vol 7 (20) ◽  
pp. 5931-5936 ◽  
Author(s):  
Xiaofang Wang ◽  
Zhongxian Qiu ◽  
Yanmei Li ◽  
Qinghua Mi ◽  
Wenli Zhou ◽  
...  
Keyword(s):  
Thermal Quenching ◽  
Core Shell ◽  
Red Phosphor

The fabrication of a CaZnOS shell prevents hydrolysis towards water and acid, and thermal quenching from heat of the red-emitting CaS:Eu2+ core.

scholarly journals Chemical heterogeneity and approaches to its control in BiFeO3–BaTiO3 lead-free ferroelectrics

2018 ◽  
Vol 6 (1) ◽  
pp. 134-146 ◽  
Author(s):  
Ilkan Calisir ◽  
David A. Hall
Keyword(s):  
Thermal Quenching ◽  
Lead Free ◽  
Chemical Heterogeneity ◽  
Core Shell ◽  
Dopant Incorporation ◽  
Switching Behaviour ◽  
Ferroelectric Switching

The formation of core–shell microstructures and ferroelectric switching behaviour in BiFeO3–BaTiO3 ceramics are controlled via dopant incorporation strategies and thermal quenching procedures.

Preparation and Magnetic Properties of FeSi/SiO2 Nanocomposites with Core-Shell Structure

2013 ◽  
Vol 834-836 ◽  
pp. 50-55
Author(s):  
Zhong Rong Geng ◽  
Yu Li ◽  
Ren Jie Yan ◽  
Cheng Bing Wang ◽  
Xiao Ming Ling
Keyword(s):  
Room Temperature ◽  
Arc Discharge ◽  
Annealing Process ◽  
Thermodynamic Theory ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Structure ◽  
Core Shell Nanoparticles ◽  
20 Nm ◽  
Dc Arc

FeSi/SiO2 Core-shell nanoparticles were synthesized by DC arc-discharge approach and annealing process. The products were characterized by SEM, TEM, EDX, XRD and VSM. As-prepared FeSi/SiO2 Core-shell nanoparticles have the diameter of 40-100 nm and the thickness of the SiO2 shell is about 20 nm. The growth mechanism based on the crystallographic and thermodynamic theory was explained. Magnetic characterization was carried out and the results showed that the FeSi/SiO2 Core-shell nanoparticles exhibited superparamagnetism characteristic at room temperature.

A crystalline–amorphous Ni–Ni(OH)2 core–shell catalyst for the alkaline hydrogen evolution reaction

2020 ◽  
Vol 8 (44) ◽  
pp. 23323-23329
Author(s):  
Jing Hu ◽  
Siwei Li ◽  
Yuzhi Li ◽  
Jing Wang ◽  
Yunchen Du ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Core Shell ◽  
Alkaline Conditions

Crystalline–amorphous Ni–Ni(OH)2 core–shell assembled nanosheets exhibit outstanding electrocatalytic activity and stability for hydrogen evolution under alkaline conditions.

Electrical Conductivity of Ni-YSZ Anode for SOFCs According to the Ni Powder Size Variations in Core-shell Structure

2015 ◽  
Vol 53 (4) ◽  
pp. 287-293
Author(s):  
Byung-Hyun Choi ◽  
Young Jin Kang ◽  
Sung-Hun Jung ◽  
Yong-Tae An ◽  
Mi-Jung Ji
Keyword(s):  
Electrical Conductivity ◽  
Shell Structure ◽  
Core Shell ◽  
Powder Size ◽  
Ni Powder ◽  
Core Shell Structure
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