scholarly journals Resistive hysteresis in flexible nanocomposites and colloidal suspensions: interfacial coupling mechanism unveiled

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 56661-56667 ◽  
Author(s):  
A. Chiolerio ◽  
I. Roppolo ◽  
K. Bejtka ◽  
A. Asvarov ◽  
C. F. Pirri
Keyword(s):  
Zno Nanoparticles ◽  
Oxygen Vacancies ◽  
Colloidal Suspensions ◽  
Coupling Mechanism ◽  
Interfacial Phenomenon ◽  
Interfacial Coupling ◽  
Acrylate Polymers

The interaction between ethoxyl groups of acrylate polymers and oxygen vacancies on the surface of ZnO nanoparticles is shown to produce resistive hysteresis according to a new interfacial phenomenon called interfacial coupling mechanism.

Influence of oxygen vacancies on the performance of ZnO nanoparticles towards CO2 photoreduction in different aqueous solutions

2020 ◽  
Vol 8 (4) ◽  
pp. 103887
Author(s):  
I.M. Hegazy ◽  
R.A. Geioushy ◽  
S.M. El-Sheikh ◽  
Ahmed Shawky ◽  
S. El-Sherbiny ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Zno Nanoparticles ◽  
Oxygen Vacancies ◽  
Co2 Photoreduction

scholarly journals Precise Control of Surface Oxygen Vacancies in ZnO Nanoparticles for Extremely High Acetone Sensing Response

2021 ◽  
Author(s):  
Jihyun Lee ◽  
Youngmoon Choi ◽  
Byoung Joon Park ◽  
Jeong Woo Han ◽  
Hyun-Sook Lee ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Oxygen Vacancies ◽  
Surface Defects ◽  
High Sensitivity ◽  
Fast Response ◽  
Oxide Semiconductor ◽  
Surface Oxygen ◽  
Zno Nps ◽  
Precise Control ◽  
Optimal Surface

Abstract ZnO has been studied intensely for chemical sensors due to its high sensitivity and fast response. Here, we present a simple approach to precisely control oxygen vacancy contents to provide significantly enhanced acetone sensing performance of commercial ZnO nanopowders. A combination of H2O2 treatment and thermal annealing produces optimal surface defects with oxygen vacancies on the ZnO nanoparticles (NPs). The highest response of ~27,562 was achieved for 10 ppm acetone in 0.125 M H2O2 treated/annealed ZnO NPs at the optimal working temperature of 400 ℃, which is significantly higher than that of reported so far in various acetone sensors based on metal-oxide-semiconductor (MOS). Furthermore, first-principles calculations indicate that pre-adsorbed O formed on the surface of H2O2-treated ZnO NPs can provide a favorable adsorption energy, especially for acetone detection, due to strong bidentate bonding between carbonyl C atom of acetone molecules and pre-adsorbed O on the ZnO surface. Our study demonstrates that controlling surface oxygen vacancies by H2O2 treatment and re-annealing at optimal temperature is an effective method to improve the sensing properties of commercial MOS materials.

scholarly journals Effects of addition of engineered ZnO nanoparticles on the stability of colloidal suspensions containing TiO2 interacting with sandy soil

2020 ◽  
Vol 73 (2) ◽  
pp. 205-212
Author(s):  
Elizabeth Mendes de Oliveira ◽  
Jonni Guiller Ferreira Madeira ◽  
Cintia de Faria Ferreira Carraro ◽  
Mara Carolina do Carmo Paresque ◽  
Jose Adilson de Castro
Keyword(s):  
Sandy Soil ◽  
Zno Nanoparticles ◽  
Colloidal Suspensions ◽  
The Stability

Oxygen vacancies enhanced photoresponsive performance of ZnO nanoparticles thin film/Si heterojunctions for ultraviolet/infrared photodetector

2019 ◽  
Vol 797 ◽  
pp. 1224-1231 ◽  
Author(s):  
Cuicui Ling ◽  
Tianchao Guo ◽  
Meixia Shan ◽  
Lin Zhao ◽  
Hongguang Sui ◽  
...  
Keyword(s):  
Thin Film ◽  
Zno Nanoparticles ◽  
Oxygen Vacancies ◽  
Infrared Photodetector

Relationships of surface oxygen vacancies with photoluminescence and photocatalytic performance of ZnO nanoparticles

2005 ◽  
Vol 48 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Liqiang Jing ◽  
Fulong Yuan ◽  
Haige Hou ◽  
Baifu Xin ◽  
Weimin Cai ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Surface Oxygen
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