Article
Chemistry, Analytical
X. Zhang, H. Kohler, M. Schwotzer, U. Guth
Summary: The electrochemical characteristics of a layered Au,Pt-YSZ mixed-potential (APE) gas sensing electrode were studied, showing a drastic reduction in mixed-potential response to CO after 100 days of operation in ambient air, which can be almost fully restored by applying cathodic polarization treatment. Additionally, polarization treatment at elevated temperatures enhanced the regeneration effect on electrochemical behaviors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Qi Lu, Lingchu Huang, Xidong Hao, Weijia Li, Bin Wang, Tong Wang, Xishuang Liang, Fangmeng Liu, Chenguang Wang, Geyu Lu
Summary: The YSZ-based mixed potential type NH3 sensor has a promising application in on-board SCR systems due to its good thermal and chemical stability. By developing high-performance sensing electrode materials, the NH3 sensing performance of this sensor was significantly improved. The sensor modified with 20 mol.% NiO exhibited the highest response to 100 ppm NH3, with a low detection limit of 5 ppm, showing potential for in-situ ammonia monitoring in industrial and automotive applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Jihyun Lee, Hyegi Min, Yong-Sahm Choe, Yun Gyu Lee, Kichul Kim, Hyun-Sook Lee, Wooyoung Lee
Summary: This study reports the high performance of Au-coated SnO2 nanorod gas sensors for detecting hazardous indoor volatile organic compounds. By optimizing the Au thickness and integrating the sensor into a miniaturized gas chromatography system, various gases can be selectively detected with ppb-level concentration measurements. The results demonstrate the potential of Au-coated SnO2 nanorod gas sensors integrated with GC as a facile indoor pollutant monitoring system.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Review
Chemistry, Analytical
Thomas Ritter, Jens Zosel, Ulrich Guth
Summary: The development of kinetically controlled potentiometric solid electrolyte gas sensors, known as mixed potential sensors (MPS), started with the discovery of kinetic limitations of equilibrium establishment on poisoned oxygen sensors. Decades of development generated knowledge on signal establishment, influencing processes, and materials for improved sensitivity, selectivity, and stability. The knowledge enabled a wide range of applications in automotive, food, medical, electric, and chemical industries. This review provides an overview of the historical development, theory of operation, analytes, materials, and applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Yihang Dong, Zhaoyang Liu, Guoxing Qiu, Lipeng Pang, Ye Han, Shuyu Yao, Jianxu Ding, Xiangnan Wang
Summary: A series of (8YSZ)(1-x)(CeO2)(x) (0 <= x <= 0.3) materials were synthesized by co-precipitation, with the highest electrical conductivity found in (8YSZ)0.9(CeO2)0.1. This composition was selected for the preparation of an oxygen sensor with a dense diffusion barrier. The sensor exhibited stable limiting current characteristics under various conditions, including temperature, oxygen concentration, and environmental gases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Nivedita Priyadarshni, Soumen Mandal, Supradeepa Panual Ganesan, Saurav Haider, Debolina Roy, Nripen Chanda
Summary: A new method for fabricating solid electrolyte-based printed potentiometric oxygen sensors using 3D printing technology and Cu-DTDTPA, with wide measurement output range, high selectivity, suitable for medical ventilator applications.
Article
Polymer Science
Petr Sedlak, Pavel Kaspar, Dinara Sobola, Adam Gajdos, Jiri Majzner, Vlasta Sedlakova, Petr Kubersky
Summary: Solid polymer electrolytes have the potential to replace conventional electrolytes in electrochemical devices. This study evaluates the impact of solvent evaporation on the preparation process and performance of solid polymer electrolytes. The results show that a higher solvent evaporation rate leads to a lower sensor sensitivity and has little effect on other properties.
Article
Chemistry, Physical
Tatiana L. Simonenko, Nikolay P. Simonenko, Philipp Yu Gorobtsov, Ivan S. Vlasov, Valentin R. Solovey, Artem Shelaev, Elizaveta P. Simonenko, Oleg Glumov, Natalia A. Melnikova, Maxim G. Kozodaev, Andrey M. Markeev, Anna A. Lizunova, Ivan A. Volkov, Vladimir G. Sevastyanov, Nikolay T. Kuznetsov
Summary: The formation process of planar solid electrolytes in the CeO2-Y2O3 system was studied using advanced printing technology with functional ink based on nanopowders. The microstructure and crystal structure of oxide nanoparticles were found to depend on yttrium concentration. The local electrophysical characteristics of the coatings were analyzed, and the technology shows promise for the production of modern solid oxide fuel cells.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Takuma Ema, Pil Gyu Choi, Seiichi Takami, Yoshitake Masuda
Summary: CeO2 nanocubes and nanooctahedrons with different facets were fabricated by controlling the morphology of CeO2 nanoparticles. The gas sensors based on these CeO2 nanoparticles exhibited enhanced sensing performance to various chemical species and show potential for disease diagnosis.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Gita Nematbakhsh Abkenar, Mathilde Rieu, Philippe Breuil, Jean-Paul Viricelle
Summary: In this study, Au-V2O5 sensing material was tested as a sensing electrode for developing mixed-potential ammonia gas sensors. By adjusting the V2O5 content, selective ammonia sensors could be achieved at high temperatures. The selectivity of the sensor to NH3 and other gases varied under different conditions.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Wei Yang, Baijun Fang, Yuanhui Zhang, Hu Meng, Jianwang He, Shantang Liu
Summary: In this study, Mo-doped stacked Co3O4 nanosheets were prepared and showed high sensitivity and selectivity towards toluene gas, providing a viable solution for detecting low reactive gases.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Peng Zhang, Le-Xi Zhang, Heng Xu, Yue Xing, Jing-Jing Chen, Li-Jian Bie
Summary: In this study, ultrathin CeO2 nanosheets were synthesized through a facile low-temperature hydrothermal method, showing potential as bifunctional sensing materials for humidity and formaldehyde vapor. The CeO2 nanosheets exhibited excellent sensing characteristics and fast response/recovery speed towards humidity and formaldehyde vapor, respectively. The sensing mechanisms for humidity and formaldehyde were also discussed.
Article
Electrochemistry
Mingming Li, Jie Hou, Yun Fan, Xiuan Xi, Xian-Zhu Fu, Jing-Li Luo
Summary: A novel electrolysis cell with SDC/YSZ bilayer electrolyte structure and Ru-CeO2 co-infiltrated SFM-SDC electrode has been fabricated. The results show that the cell exhibits good chemical adsorption and electrochemical performance in direct CO2 electrolysis.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Qingyue Wang, Yuxin Li, Ana Serrano-Lotina, Wei Han, Raquel Portela, Ruixuan Wang, Miguel A. Banares, King Lun Yeung
Summary: A unique 1D nanostructure of Pt@CeO2-BDC was prepared for toluene oxidation, facilitating the stepwise oxidation of toluene to CO2 and H2O. The presence of Pt clusters on the catalyst surface promoted the adsorption of toluene and reaction activation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
Yongjiao Sun, Bingliang Wang, Zhiyuan Lu, Wenlei Zhang, Wendong Zhang, Koichi Suematsu, Jie Hu
Summary: In this study, we fabricated Pd-loaded Co3O4/In2O3 hollow microtubes heterostructures, which show promising potential for detecting trace toluene gas in humid atmosphere. Through characterization and analysis, we confirmed the morphology of the hollow microtubes, structure of the heterojunctions, and the influence of components and Pd NPs loading on gas sensing performance. The Pd@Co3O4/In2O3 (PdCoIn-2) sensor exhibited high responses, low limit of detections, fast response and recovery times, excellent selectivity, repeatability, and long-term stability, making it an efficient sensor for toluene detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Nobumitsu Oide, Taro Ueda, Kai Kamada, Takeo Hyodo, Yasuhiro Shimizu
ANALYTICAL SCIENCES
(2020)
Review
Chemistry, Analytical
Takeo Hyodo, Yasuhiro Shimizu
ANALYTICAL SCIENCES
(2020)
Article
Chemistry, Analytical
Taro Ueda, Thomas Defferriere, Takeo Hyodo, Yasuhiro Shimizu, Harry L. Tuller
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Nanoscience & Nanotechnology
Nantikan Tammanoon, Takumi Iwamoto, Taro Ueda, Takeo Hyodo, Anurat Wisitsoraat, Chaikarn Liewhiran, Yasuhiro Shimizu
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Analytical
Taro Ueda, Inci Boehme, Takeo Hyodo, Yasuhiro Shimizu, Udo Weimar, Nicolae Barsan
Article
Materials Science, Ceramics
Takeo Hyodo, Takeru Hiura, Kazunori Nagae, Taro Ueda, Yasuhiro Shimizu
Summary: Adsorption/combustion-type gas sensors show large dynamic responses to volatile organic compounds under pulsed temperature heating. The co-loading of Pt with CeO2 onto gamma-Al2O3 was found to be the most effective in enhancing the dynamic response by efficiently oxidizing various compounds adsorbed at 150 degrees Celsius to form CO2.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2021)
Article
Electrochemistry
Satoko Takase, Ayumi Kimoto, Masaki Kusunoki, Youichi Shimizu
Summary: The study demonstrated that hydrophilicity affects the oxygen reduction current differently in the reaction rate-determining range and the diffusion rate-determining range. Increasing hydrophilicity extends the three-phase interface in the reaction rate-determining range, while in the diffusion rate-determining range, high hydrophilicity suppresses oxygen diffusion.
Article
Chemistry, Multidisciplinary
Taro Ueda, Inci Boehme, Takeo Hyodo, Yasuhiro Shimizu, Udo Weimar, Nicolae Barsan
Summary: The study found that the resistance of the sensor loaded with gold in dry air was lower than that of the sensor without gold. Additionally, the characteristic spectral band of oxygen adsorbates increased significantly, leading to an improvement in the adsorption of NO2.
Article
Electrochemistry
Shotaro Nomoto, Hiroki Kitamura, Satoko Takase, Youichi Shimizu
Summary: Transition metal-tungsten nitrides were synthesized and their electrocatalytic properties on oxygen reduction and evolution reactions were studied. Co3W3N showed high oxygen electrocatalytic performance, while Ni-doped (Co1-xNix)(3)W3N exhibited the best bifunctional electrocatalytic properties.
Article
Chemistry, Analytical
Mehrdad Asgari, Fahimeh Hooriabad Saboor, Seyed Parsa Amouzesh, Martin Watt Coull, Abbas Ali Khodadadi, Yadollah Mortazavi, Takeo Hyodo, Yasuhiro Shimizu
Summary: SiO2/ZnO core/shell sensors were synthesized using ultrasonic-assisted deposition-precipitation method. The addition of silica as the core material enhanced the selectivity, stability, and reversibility of the sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Takeo Hyodo, Toshiro Okusa, Wataru Sakata, Taro Ueda, Yasuhiro Shimizu
Summary: This study discusses the effects of surface modification of Pt sensing electrodes with Au on the H2-sensing properties and mechanism of gas sensors based on anodized titania. The results show that the addition of Au significantly enhances the H2 response of the Pt/TiO2 sensor, and the presence of moisture further increases the H2 response.
Article
Chemistry, Analytical
Soichiro Torai, Taro Ueda, Kai Kamada, Takeo Hyodo, Yasuhiro Shimizu
Summary: Porous (pr-)SnO2-based powders were synthesized using ultrasonic spray pyrolysis with home-made polymethylmethacrylate (PMMA) microspheres as templates. The addition of CuxO to the pr-SnO2 powder improved its sensing properties for acetone and toluene. The 0.8 wt% Cu-added pr-SnO2 sensor showed the highest acetone response at 350 degrees C. The addition of CuxO decreased the concentration of carrier electrons and the acetone-oxidation activity, leading to the improvement of the acetone-sensing properties of the pr-SnO2 sensor.
Article
Chemistry, Physical
Yuma Tano, Muhammad Sohail Ahmad, Yuya Watase, Tatsuki Tsugawa, Satoko Takase, Yusuke Inomata, Kazuto Hatakeyama, Shintaro Ida, Quitain Armando, Youichi Shimizu, Tetsuya Kida
Summary: This study investigates the impact of oxygen functional groups on the graphene support material in Sn/graphene composites. It reveals that Sn nanoparticles anchored on epoxy-functionalized graphene oxide facilitate the efficient generation of formic acid. The study emphasizes the crucial role of support materials in electrocatalytic performance and offers insights into optimizing the support material for the conversion of CO2 into renewable fuels.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Materials Science, Ceramics
Takeo Hyodo
Summary: This article reviews the compositional and microstructural design techniques of various promising materials for advanced gas-sensing devices. Strict control over mesopores and macropores is achieved through self-assembly and chemical modification, respectively, resulting in improved gas reactivity and diffusivity. Temperature-modulation and light-driven operations are also effective in enhancing gas sensitivity and selectivity. These novel approaches are instrumental for further growth and development of gas sensors.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Materials Science, Ceramics
Takeo Hyodo, Azusa Iwanaga, Keijiro Ishida, Kai Kamada, Taro Ueda, Yasuhiro Shimizu
Summary: The study focused on the impact of noble metals on the gas-sensing properties of indium oxide (In2O3) powders under UV-light irradiation for NO2, H2, and ethanol. Gold (Au) loading significantly enhanced the response of the In2O3 sensor to NO2, particularly under weak UV-light, while palladium (Pd) loading efficiently increased the conductance difference between NO2 and air for the sensor under UV-light irradiation.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2021)
Article
Chemistry, Analytical
Mengmeng Guo, Na Luo, Yueling Bai, Zhenggang Xue, Qingmin Hu, Jiaqiang Xu
Summary: A porous heterostructure WO3-C/In2O3 was designed and prepared for a miniature H2 sensor, which showed higher response value, lower operating temperature, fast response-recovery speed, and low limit of detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Feng Hu, Hui Hu, Yuting Li, Xiaohui Wang, Xiaowen Shi
Summary: Arsenic contamination in water bodies is a significant health risk. This study developed a chitosan-catechol modified electrode for rapid and accurate detection of trace amounts of arsenic. The modified electrode demonstrated good detection capability and resistance to ionic interference, making it suitable for in situ detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Yantao Zhang, Qian Liu, Tao Tian, Chunhua Xu, Pengli Yang, Lianju Ma, Yi Hou, Hui Zhou, Yongjun Gan
Summary: In this study, a lysosome-targeting buffering fluorogenic probe (Lyso-BFP) was designed and synthesized, demonstrating excellent photostability, pH specificity, and responsiveness to lysosomal acidification in living cells. The performance of Lyso-BFP in pH sensing was attributed to the inhibition of the photo-induced electron transfer process. Lyso-BFP allowed for wash-free imaging and long-term real-time monitoring of lysosome pH changes based on its off-on fluorescence behavior and buffer strategy.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Wei Cai, Wenbo Sun, Jiayue Wang, Xiaokui Huo, Xudong Cao, Xiangge Tian, Xiaochi Ma, Lei Feng
Summary: In this study, a near-infrared fluorescent probe HCBG was developed for imaging of alpha-GLC. HCBG exhibited excellent selectivity and sensitivity towards alpha-GLC in complex bio-samples, and showed good cell permeability for in situ real-time imaging. Through the high-throughput screening system established by HCBG, a natural alpha-GLC inhibitor was successfully isolated and identified. This study provides a novel fluorescence visualization tool for discovering and exploring the biological functions of diabetes-related gut microbiota, and a high-throughput screening approach for alpha-GLC inhibitor.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Trey W. Pittman, Xi Zhang, Chamindie Punyadeera, Charles S. Henry
Summary: Heart failure is a growing epidemic and a significant clinical and public health problem. Researchers have developed a portable and affordable diagnostic device for heart failure that can be used at the point-of-care, providing a valid alternative to current diagnostics approaches.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Anders O. Tjell, Barbara Jud, Roland Schaller-Ammann, Torsten Mayr
Summary: An optical hydrogen peroxide sensor based on catalytic degradation and the detection of produced oxygen is presented. The sensor offers higher resolution and better sensitivity at lower H2O2 concentrations. By removing O2 from the sample solution, a more sensitive O2 sensor can be used for measurement. The sensor has been successfully applied in a flow-through cell to measure H2O2 concentration in different flow rates.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Seong Jae Kim, Ji-hun Jeong, Gaabhin Ryu, Yoon Sick Eom, Sanha Kim
Summary: Surface-enhanced Raman spectroscopy (SERS) is a high-sensitivity, label-free detection method with various analytical applications. Researchers have developed a hydrophobic SERS substrate based on engineered carbon nanotube arrays (CNT-SERS) and studied the role of structural design at both micro and nanoscales. The substrate demonstrated controlled self-enrichment capability and enhanced sensitivity, with a significant increase in the SERS signal. The study also proposed a theoretical model and a concentration strategy inspired by plants for analyte deposition on microarrays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Dan Zhao, Renjun Jiang, Xiaoqiang Liu, Subbiah Alwarappan
Summary: In this study, a novel ternary composite material was constructed by assembling cerium vanadate nanorods on reduced graphene oxide-microcrystalline cellulose nanosheets, and it was used for real-time monitoring of the concentration of superoxide anions in vivo. The ternary composite showed excellent conductivity, large surface area, and abundant active sites, leading to a wider linear range, high sensitivity, low detection limit, and fast response time for superoxide anion detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Tengfei Wang, Liwen Wang, Guang Wu, Dating Tian
Summary: In this study, a covalent organic framework material TaTp-COF with porous and uniform spheres was successfully prepared via hydrothermal reaction, and it was found to significantly enhance the aggregation-induced emission (AIE) of berberine. The unique emission properties of berberine on TaTp-COF were studied and utilized for the sensitive detection of berberine.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Lin Li, Yilei Ding, Lei Xu, Shuoran Chen, Guoliang Dai, Pengju Han, Lixin Lu, Changqing Ye, Yanlin Song
Summary: In this study, a novel TTI based on a ratiometric fluorescent nanosensor is designed, which has the advantages of high accuracy and low cost. Experimental and theoretical investigations confirm its pH responsiveness and demonstrate its good sensitivity and reliability. By monitoring the total volatile basic nitrogen, this TTI can accurately predict food spoilage and can be adaptively modified for different types of food. The TTI based on this nanosensor enables visual monitoring of food quality.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Fangju Chen, Xueting Wang, Wei Chen, Chenwen Shao, Yong Qian
Summary: Lung cancer is the second most common malignant tumor worldwide. Drug resistance in lung cancer leads to treatment failure and recurrence in majority of patients. This study developed a fluorescent prodrug that can be activated in cancer cells to release drugs, and its signal can be tracked by imaging. It shows a unique autophagy-driven ferroptosis effect, indicating its potential for targeting drug-resistant cancer cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Weichao Li, Qiming Yuan, Zhangcheng Xia, Xiaoxue Ma, Lifang He, Ling Jin, Xiangfeng Chu, Kui Zhang
Summary: This study developed a high-performance gas sensor for formaldehyde detection by modifying ZnSnO3 with ZnO QDs and SnO2 QDs. The modified sensor showed improved sensing response and lower working temperature. The presence of ZnO QDs formed rich heterojunctions, increased surface area, and provided oxygen deficiency for formaldehyde sensing reaction, thus enhancing the sensor performance. This research provides an alternative method to enhance the sensing properties of MOS by QDs modification.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Joung-Il Moon, Eun Jung Choi, Younju Joung, Jin-Woo Oh, Sang-Woo Joo, Jaebum Choo
Summary: A novel nanoplasmonic substrate was developed for biomedical applications, which showed strong hot spots for detecting biomarkers at low concentrations. The substrate, called AuNPs@M13, was made by immobilizing 60 nm gold nanoparticles onto the surface of an M13 bacteriophage scaffold. It demonstrated higher sensitivity and lower limit of detection compared to commercially available assays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Ning Li, Ya Zhang, Ying Xu, Xiaofang Liu, Jian Chen, Mei Yang, Changjun Hou, Danqun Huo
Summary: The molecular subtype of breast cancer guides treatment and drug selection. Invasive tests can promote cancer cell metastasis, so the development of high-performance, low-cost diagnostic tools for cancer prognosis is crucial. Liquid biopsy techniques enable noninvasive, real-time, dynamic, multicomponent, quantitative, and long-term observations at the cellular, genetic, and molecular levels. A Cu-Zr metal-organic framework (MOF) nanoenzyme with monatomic Cu attachment has been synthesized and proven to have high catalytic performance. The sensor constructed using this nanoenzyme shows potential for accurate classification of breast cancer serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Jeongmin Kim, Hyemin Kim, Seunghyun Park, Hyeonaug Hong, Yong Jae Kim, Jiyong Lee, Jaeho Kim, Seung-Woo Cho, Wonhyoung Ryu
Summary: This study presents a method to fabricate independently functioning microneedle (MN) electrodes with narrow intervals for high precision electrochemical sensing. The optimized mixture of photocurable polymer and single-wall carbon nanotubes was used to mold single composite MNs, which were then attached to pre-patterned electrodes. Plasma etching and electropolymerization were performed to enhance the electrochemical activity, and Prussian blue and glucose oxidase were electrodeposited on the MNs for glucose detection. The MN electrodes showed good sensitivity and linearity, and the feasibility of glucose detection was demonstrated in an in vivo mouse study.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)