Article
Chemistry, Analytical
Shimrith Paul Shylendra, Wade Lonsdale, Magdalena Wajrak, Mohammad Nur-E-Alam, Kamal Alameh
Summary: A solid-state potentiometric pH sensor was designed with high linearity, low hysteresis, and drift values. Results showed better redox interference performance for TiN electrodes compared to IrO2 electrodes, paving the way for the development of pH sensors for difficult matrices.
Article
Materials Science, Multidisciplinary
Hyungmin Kim, Kyunghwan Kim, Jeongsoo Hong
Summary: In this study, NiO films were fabricated through radio frequency sputtering and processed via rapid thermal annealing to improve their properties. The results showed that the electrical, optical, and crystallographic properties of the NiO films were influenced by their oxygen content. Rapid thermal annealing can improve the crystallinity and mobility of the films, but it also reduces the oxygen content.
Article
Chemistry, Multidisciplinary
Joselito Puzon Labis, Hamad A. Albrithen, Mahmoud Hezam, Muhammad Ali Shar, Ahmad Algarni, Abdulaziz N. Alhazaa, Ahmed Mohamed El-Toni, Mohammad Abdulaziz Alduraibi
Summary: In this paper, a hybrid approach combining pulsed laser deposition (PLD) and RF magnetron sputtering (RFMS) is used to design and synthesize 2D/3D Al2O3-ZnO nanostructures. The optimized parameters of PLD and RFMS are explored to grow ZnO and Al2O3-ZnO nanostructures simultaneously. The grown nanostructures show exceptional properties and have potential applications in optoelectronics and bio/gas sensors.
Article
Engineering, Electrical & Electronic
Kuan-Hsiang Chen, Jing-Shiuan Niu, Wen-Chau Liu
Summary: A new hydrogen gas sensor with palladium nanoparticles and cerium oxide thin film was synthesized and characterized. The sensor demonstrated high sensing response, short response time, wide operating ranges of temperature and hydrogen concentration, and advantages of a simple structure, easy fabrication process, and relatively low cost.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Engineering, Electrical & Electronic
Yu-Chung Yang, Jing-Shiuan Niu, Wen-Chau Liu
Summary: An interesting hydrogen gas sensor utilizing palladium nanoparticles to enhance surface area/volume ratio and catalytic reactivity was studied. The sensor showed high sensing response and low detecting content for hydrogen gas at optimal operating temperature, with excellent selectivity and advantages of simple structure, low cost, and easy fabrication process.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Nanoscience & Nanotechnology
C. M. Samba Vall, M. Chaik, A. Tchenka, S. Hnawi, A. Mellalou, A. El Kissani, M. Aggour, A. Outzourhit
Summary: Zinc sulfide (ZnS) and chromium-doped zinc sulfide (ZnS:Cr) thin films were grown on glass and Si substrates by cathodic radio-frequency (RF) sputtering. The effect of Cr percentage on the structural, morphological, and optical properties of the deposited thin films were studied. The research found that the crystallite size increased, strain decreased, and optical and electrical properties changed with the addition of chromium in the films.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Engineering, Electrical & Electronic
Anoop Kumar Singh, Chao-Chun Yen, Chun-Fan Wen, Ray-Hua Horng, Dong-Sing Wuu
Summary: Researchers have developed a NO gas sensor with high sensing response for measuring NO gas levels. The sensor is made of ZnO:ZnGa2O4 dual-phase films and exhibits high selectivity and quick response time.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
J. M. Kalita, M. P. Sarma, G. Wary
Summary: X-ray sensing properties of chromium-doped titanium dioxide thin films synthesized by a chemical bath deposition method were studied. The doping of Cr led to an increase in crystallite size, a decrease in optical band gap, and enhanced electrical conductivity of the films. Furthermore, the doping influenced the rise time and decay time of radiation-induced current, as well as the detection sensitivity of the films.
Article
Chemistry, Physical
Sevda Saritas
Summary: Fe2-xSnxO3 structures were grown using RF-DC magnetron co-sputtering. The band gap, morphology, and structural features of the film were studied, revealing their influence on the gas sensor response.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Electrical & Electronic
Rashmi Ranjan Kumar, Raghvendra Shukla, Saurabh Kumar Pandey
Summary: This article presents the impact of different radio frequency (RF) power during deposition on the properties of ZnO thin films. The experiments reveal that RF power variation during the deposition process significantly affects the structural, morphological, electrical, and optical properties of the films.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Physical
Yerulan Sagidolda, Saule Yergaliyeva, Zhandos Tolepov, Guzal Ismailova, Bakytzhan Orynbay, Renata Nemkayeva, Oleg Prikhodko, Svetlana Peshaya, Suyumbika Maksimova, Nazim Guseinov, Yerzhan Mukhametkarimov
Summary: This study explores the structural properties of composite thin films consisting of oxide matrices and gold nanoparticles and their exhibit of localized surface plasmon resonance (LSPR) effects. Spectroscopic study, particularly Raman spectroscopy, reveals the unique features of these composite systems.
Article
Materials Science, Multidisciplinary
Zhenjie Lv, Congchun Zhang, Yusen Wang, Zhipeng Kang, Xiangxiang Gao, Yixue Guo
Summary: This paper studies the application of indium tin oxide (ITO) and indium oxide (In2O3) films in high-temperature thermocouples and strain gauges. ITO-In2O3 thermocouples were fabricated by magnetron sputtering. The electrical properties of air-annealed and two-step nitrogen-annealed thermocouples were compared.
Article
Materials Science, Multidisciplinary
G. V. Umoh, J. T. Holguin-Momaca, R. P. Talamantes, G. Rojas-George, G. Herrera-Perez, R. Lopez Anton, Francisco Servando Aguirre-Tostado, O. Auciello, S. F. Olive-Mendez, A. Hurtado-Macias
Summary: This study investigates the growth conditions and the role of ex-situ thermal treatments on BiMnO3-6 thin films using radiofrequency magnetron sputtering. The optimized thin films exhibit both ferroelectricity and ferromagnetism, making them suitable for device applications.
Article
Chemistry, Physical
Milad Laghaei, Mohsen Ghasemian, Mahmoud Reza Ghandehari Ferdowsi, Juerg A. Schuetz, Lingxue Kong
Summary: This study investigates the fabrication of nanoporous composites of titanium-vanadium oxide using magnetron sputtering, electrochemical anodization, and annealing processes. The effect of varying vanadium sputtering power on the composite semiconductors and their photodegradation performance was studied. The results showed that the composite with the lowest vanadium content exhibited the highest degradation efficiency under solar-simulated irradiation due to its homogeneous vanadium dispersion and lower recombination possibility.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Juan Angel Tomas-Egea, Pedro J. Fito, Ricardo J. Colom, Marta Castro-Giraldez
Summary: In recent years, there has been a growing interest in nutrition and digestion, but there is still much work to be done in developing sensors and techniques to identify chemical species. Iron deficiency is a common nutritional disorder that affects the health of children and women. This paper focuses on developing a sensor to measure the release of active compounds for improved prediction and measurement potential.
Article
Chemistry, Applied
Xianfa Zhang, Liancai Xun, Shan Gao, Yingming Xu, Xiaoli Cheng, Hui Zhao, Lihua Huo
Summary: The novel hierarchically structured V2O3@N-doped carbon nanosheet arrays on nickel foam exhibit superior electrochemical performance as a free-standing anode for lithium-ion batteries, with a high reversible capacity and long cycling life. The hierarchical structure and uniform N-doped carbon coated network contribute to the enhanced conductivity and reduced volume expansion of the electrode, leading to improved overall electrochemical performance.
Article
Chemistry, Physical
Zhao Shijie, Li Na, Sun Liping, Li Qiang, Huo Lihua, Zhao Hui
Summary: This paper investigates the synthesis of Pr2CuO4-Pr6O11 composites using a one-pot method and characterizes their phase evolution and oxygen reduction reaction properties. The decoration of Pr6O11 effectively enhances the oxygen adsorption capability of the composite cathode. The composite exhibits promising performance as a cathode material for solid oxide fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Max Gaessler, Jakob Stahl, Marco Schowalter, Suman Pokhrel, Andreas Rosenauer, Lutz Maedler, Robert Guettel
Summary: This study investigates the impact of catalyst support on the dynamics of methanation and reveals that the support material plays a major role in activity, selectivity, and deactivation behavior. The adsorption of H2O strongly depends on the support material and influences the CH4 formation rate. Changes in selectivity and deactivation are observed in CO2 methanation.
Article
Chemistry, Multidisciplinary
J. Y. Wang, L. P. Sun, Q. Li, L. H. Huo, H. Zhao
Summary: Replacing the sluggish oxygen evolution reaction with methanol oxidation reaction is an effective strategy to improve the efficiency of hydrogen evolution reaction while obtaining valuable by-products.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Suman Pokhrel, Jakob Stahl, Jan Derk Groeneveld, Marco Schowalter, Andreas Rosenauer, Johannes Birkenstock, Lutz Maedler
Summary: The development of a novel reactive spray technology based on the gas-phase metal oxide synthesis route opens up opportunities for producing non-oxide nanoparticles. Metal sulfides, including MnS, CoS, Cu2S, ZnS, Ag2S, In2S3, SnS, and Bi2S3, are successfully synthesized in a sulfur-rich environment. The combined approach of flame sprays and single-droplet combustion provides insights into the gas-phase formation of metal sulfides, paving the way for scalable synthesis of functional metal sulfides.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Ceramics
Guihua Zou, Liping Sun, Lihua Huo, Hui Zhao
Summary: Cu-SnO2 is evaluated as a dual mode-sensing material for fast and accurate detection of H2O2. The material shows peroxidase-like behavior consistent with the Michaelis-Menten equation. An electrochemical sensor based on this material exhibits wide working range, low detection limit, and promising sensitivity for H2O2 detection. It can successfully detect H2O2 released from human liver cancer cells.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Sainan Zhang, Yingming Xu, Xiaoli Cheng, Shan Gao, Xianfa Zhang, Hui Zhao, Lihua Huo
Summary: In this work, flower-like Mn-based coordination polymers constructed by nanosheets were designed and synthesized, and hierarchical structured MnO/NC composites were successfully obtained through calcination. The composites exhibited a unique yolk-shell structure composed of micro-flowers assembled from nitrogen-doped carbon nanosheets uniformly loaded with MnO nanoparticles as the outer shell and MnO/NC nanoparticle aggregates as the inner core. The composites demonstrated high specific capacity and excellent long cycle stability, attributed to the synergistic effect of the yolk-shell structure and continuous nitrogen-doped carbon coating.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Tingqiang Yang, Anne Hemeryck, Suman Pokhrel, Wen Chen, Lutz Maedler, Udo Weimar, Nicolae Barsan
Summary: The combination of operando DRIFTS measurement and DFT calculation reveals the counterintuitive HCHO sensing mechanism of In4Sn3O12. At the optimum temperature of 200 degrees C, HCHO undergoes partial oxidation to formate (or HCOOH) with medium activation energy (0.43-0.68 eV) and sufficient electron donation effect, resulting in the generation of sensor signal. The Sn(3a)-connected O acts as the active site, playing crucial roles in both HCHO adsorption and partial oxidation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Biotechnology & Applied Microbiology
Evelien Hesemans, Neshat Saffarzadeh, Christy Maksoudian, Mukaddes Izci, Tianjiao Chu, Carla Rios Luci, Yuqing Wang, Hendrik Naatz, Sebastian Thieme, Cornelia Richter, Bella B. Manshian, Suman Pokhrel, Lutz Madler, Stefaan J. Soenen
Summary: Nanoparticle-mediated cancer immunotherapy holds great promise, but more efforts are needed to obtain nanoformulations that result in a full scale activation of innate and adaptive immune components that specifically target the tumors. Fine-tuning nanoparticle properties resulted in a formulation of 33% Cu-doped TiO2 which enabled short-lived hyperactivation of dendritic cells and hereby promoted immunotherapy. These nanoparticles result in highly efficient activation of dendritic cells ex vivo, which upon transplantation in tumor-bearing mice, exceeded the therapeutic outcomes obtained with classically stimulated dendritic cells.
JOURNAL OF NANOBIOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Lina Sun, Liping Sun, Lihua Huo, Hui Zhao
Summary: A study has successfully synthesized porous carbon catalysts co-doped with nitrogen and oxygen by pyrolysis and oxidation. The catalyst exhibits high selectivity and generation rate for 2e(-) ORR, and the introduction of -COOH functional group enhances its performance. The study provides new insights for the production of H2O2 using MOF-derived carbon catalysts via electrocatalytic oxygen reduction.
Article
Environmental Sciences
Susana I. L. Gomes, Carlos P. Roca, Suman Pokhrel, Lutz Maedler, Janeck J. Scott-Fordsmand, Monica J. B. Amorim
Summary: The risks of nanomaterials/nanoparticles (NMs/NPs) in the environment were evaluated using a wide range of different NMs. The study found that exposure to NPs led to various biological mechanisms, including impaired RNA processing and deregulated apoptosis.
Article
Chemistry, Physical
Wenzhuo Yu, Lihua Huo, Liping Sun, Hui Zhao
Summary: The study demonstrates the successful construction of a heterogeneous structure Cu3P@CoFe-LDH/CF, which shows promising electrocatalytic activity for overall water splitting. The p-n heterojunction between Cu3P and CoFe-LDH contributes to the enhanced charge-transfer reaction. This work provides a facile method to improve electrocatalytic activity and holds significant promise for renewable energy technology.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yue Xin, Liping Sun, Lihua Huo, Hui Zhao
Summary: In this study, a self-supported cobalt nickel bimetallic phosphide nanoneedle array (Co-Ni-P/NF) is designed to achieve excellent bifunctional activity for the hydrogen evolution reaction (HER) and methanol electro-oxidation reaction (MOR). The p-n heterogeneous junctions formed between nickel phosphide and cobalt phosphide promote electron accumulation on CoP, enhancing HER activity, while the increased MOR activity is attributed to in situ generated holes in Ni2P. Benefiting from optimized interface/surface electronic structures, Co-Ni-P/NF exhibits a high current density of 100 mAcm(-2) at a low voltage of 1.45 V in a two-electrode electrolyzer. The faradic efficiency for both HER and MOR reaches 100%, demonstrating the excellent bifunctional catalytic activity of Co-Ni-P/NF nanoneedle arrays. This work provides insights into the development of novel bifunctional electrocatalysts for value-added chemical production and highly efficient hydrogen evolution.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Chunjiao Liu, Liping Sun, Qiang Li, Lihua Huo, Hui Zhao
Summary: The phase structure, direct current conductivity, oxygen mobility characteristics, and electrochemical properties of cobalt-based high-entropy perovskite oxides with different alkaline earth metal contents were studied in this paper. It was found that by continuously substituting rare earth elements with alkaline earth elements in high-entropy materials, the content of oxygen vacancies increased and the electrochemical performance was enhanced. The high-entropy oxide La0.2Pr0.2Ba0.2Sr0.2Ca0.2CoO3 exhibited a chemical oxygen diffusion coefficient (Dchem) of 2.8 x 10-6 cm2 s-1 and a surface exchange coefficient (Kchem) of 9.1 x 10-3 cm s-1 at 700 degrees C. The anode-supported fuel cell using this high-entropy oxide achieved a peak power density of 792 mW cm-2 at 700 degrees C, showing excellent long-term stability and CO2 resistance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Xu Yang, Sun Liping, Li Qiang, Huo Lihua, Zhao Hui
Summary: A high entropy spinel oxide was synthesized via the solvothermal method and its electrocatalytic properties for the oxygen evolution reaction (OER) were evaluated. The results showed that the multi-metallic element doping strategy in high entropy spinel oxide can enhance the adsorption ability of the catalyst, increase the covalency of the metal-oxygen bond, and improve the catalytic activity for OER.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
