Article
Engineering, Environmental
Qiong Chen, Yongheng Zhang, Shuyi Ma, Yuhua Wang, Peiyu Wang, Guoheng Zhang, Duojie Gengzang, Haiyan Jiao, Mingxiao Wang, Wanjun Chen
Summary: The study focused on synthesizing multishelled NiO/NiCo2O4 hollow microspheres using bimetal-organic frameworks of Ni-Co-BTC as a template, which exhibited high sensitivity and rapid response/recovery time to acetone gas at low working temperature. The enhanced performance was attributed to the efficient diffusion path, nanoscale p-p heterojunctions, and the combination of chemical and electrical catalytic effects.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Zhicheng Cai, Jiho Park, Sunghoon Park
Summary: Pd and Fe2O3 nanoparticles-embedded porous NiO nanofibers with high specific surface area were prepared using electrospinning. Adjusting the amount of Fe2O3 nanoparticles in the precursor solution regulated the morphological evolution and crystallization of oxide heterostructures, leading to enhanced gas sensing performance for hydrogen gas. The sensors exhibited excellent response towards 1000 ppm H-2 gas, with a response time of 11 seconds and good selectivity and stability.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Zhengyang Chen, Fubin Fu, Jing Cao, Ling An, Kaihua Zhang, Quan Chen
Summary: We designed and prepared a functional carbon material AHC (acetylenic acid-hexamethylene diamine-carbon) using alkynyl acid and cyclohexadiene as raw materials, which was loaded on ZnO@NiO to prepare an acetone gas sensor. The optimal amount of AHC on ZnO@NiO was found to be 0.12% and the best working temperature was 200 degrees C. Compared to the ZnO@NiO sensor, the ZnO@NiO@AHC sensor for 100 ppm acetone gas showed a maximum response value of 49.08, which was twice as high. The minimum detection limit was 1 ppm and there was an approximate linear relationship between concentration and sensitivity in the range of 1-300 ppm.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
Chao Gu, Ziyu Lyu, Qin Hu, Yanping Bao
Summary: In this study, the structural and mechanical properties of Ca-SiO2 compounds in liquid steels were investigated using first-principles density functional theory. Eight different phases were identified and their stability and properties were determined. The results provide valuable insights into the Ca-SiO2 compound particles in steels and contribute to the development of a corresponding property database.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
S. W. Fan, L. Yang, Yu Chen, Baoying Dou
Summary: In this study, the performance of Cu and Ag-doped NiO was evaluated using the density functional theory method. It was found that CuNi and AgNi serve as deep acceptors with high ionization energy. The p-type conductivity of Cu and Ag-doped NiO mainly originates from coexistent Ni vacancies.
MATERIALS TODAY COMMUNICATIONS
(2022)
Review
Chemistry, Physical
Jia-Jin Lian, Wen-Tao Guo, Qi-Jun Sun
Summary: In recent years, extensive research has been conducted on the development of high-performance flexible tactile sensors. The materials that show promise in this field are functional polymer composites (FPCs), due to their exceptional mechanical and electrical properties. This review provides a comprehensive overview of recent advances in FPCs-based tactile sensors, including their fundamental principle, necessary property parameter, unique device structure, fabrication process, and various applications.
Article
Chemistry, Multidisciplinary
Jiaqi Yang, Wenjiang Han, Bin Jiang, Xi Wang, Yanfeng Sun, Wenyang Wang, Ruilin Lou, Hedi Ci, Hong Zhang, Geyu Lu
Summary: Designing high-performance triethylamine gas sensors with stable gas response and low resistance variation in air under a wide relative humidity range is important for human health and environmental surveillance. In this study, a novel porous NiO/NiFe2O4 fiber-in-tube nanostructure is prepared and evaluated for its gas sensing performance. The results show that introducing NiO as the second component improves the sensor's baseline resistance and gas sensing performance. The sensor with a Ni/Fe molar ratio of 1.5 exhibits the best performance, with a significantly higher gas response and excellent humidity resistance.
Article
Chemistry, Analytical
Andreas Voss, Rico Schroeder, Steffen Schulz, Jens Haueisen, Stefanie Vogler, Paul Horn, Andreas Stallmach, Philipp Reuken
Summary: The purpose of this exploratory study was to determine whether liver dysfunction can be generally classified using a wearable electronic nose based on semiconductor metal oxide (MOx) gas sensors, and whether the extent of this dysfunction can be quantified. The study found that the wearable, non-invasive system could detect liver dysfunctions and accurately distinguish different degrees of cirrhosis patients and healthy controls.
Article
Chemistry, Analytical
Jana Shepa, Ivana Sisolakova, Marek Vojtko, Libuse Trnkova, Geza Nagy, Iveta Maskal'ova, Andrej Orinak, Renata Orinakova
Summary: The study successfully prepared a sensor for insulin determination using a carbon electrode and NiO nanoparticles, showing a wide linear range and high sensitivity, and stable detection of insulin even in bovine blood serum.
Article
Chemistry, Multidisciplinary
Amarjyoti Das, R. K. Yadav
Summary: The study shows that by doping boron and phosphorus, the electronic and optical properties of silicon-germanium nanosheets can be controlled, resulting in Fermi energy shifts and charge transfers. Doping with boron and phosphorus leads to a redshift in the maximum absorption wavelength of the nanosheet from visible to infrared region.
STRUCTURAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Pinak Chakraborty, Nitumoni Deka, Dulal Chandra Patra, Kamalesh Debnath, Suvra Prakash Mondal
Summary: The study focuses on the development of porous NiO nanostructures based electrodes for non-invasive glucose sensing from saliva samples. The optimized electrode showed excellent glucose sensitivity and fast response time, making it a potential low-cost, portable, and efficient biosensor for disease monitoring.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
K. GangaReddy, M. V. Ramana Reddy
Summary: Highly sensitive and selective ammonia sensors were developed based on Zn2+ doped NiO thin films with controlled morphology through a substrate temperature variation using the electron beam evaporation method. The prepared films were systematically characterized and confirmed to have good structural and elemental attributes. The Zn: NiO sensors exhibited excellent selectivity towards ammonia at room temperature, with higher sensitivity observed for films deposited at higher temperatures. The incorporation of Zn into NiO enhanced the sensor's response through increased adsorption of oxygen on the surface.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Kaijian Zhu, Guido Mul, Annemarie Huijser
Summary: Delafossite CuBO2 has been experimentally validated as a promising p-type semiconductor for photocathodes, showing higher hole mobility and slower charge recombination compared to traditional NiO.
Article
Spectroscopy
Yi-Wei Fan, Huai-Qian Wang, Hui-Fang Li
Summary: The study on hydrated clusters Co(H2O)(n)(-) in gas phase using DFT coupled with stochastic kicking method reveals that the global minimum structure of Co(H2O)(n)(-) exhibits a low-symmetry pattern. The Co- ion tends to be located at the vertex site of the water molecular clusters to reduce repulsion with O atom. These results demonstrate that the formation of these low-lying isomers is determined by the delicate balance between ion-water and water-water interactions.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Materials Science, Multidisciplinary
Xuzhao Zhang, Shujing Gao, Yingjie Qu, Haiting Wang
Summary: In this study, a flexible wearable electronic skin is used to sense non-touch objects and investigate the sensing properties of charged objects. The results demonstrate that the sensing response of the organic device depends on the charge quantity of the stimuli, rather than the applied pressure.
ORGANIC ELECTRONICS
(2022)
