Article
Metallurgy & Metallurgical Engineering
Ming Jiang, Zhan Cheng, Dan Zhao, Lei Zhang, Dong Xu
Summary: In this study, Mg-doped CCTO thin films were prepared by a modified sol-gel method, and a comparative study on their microstructure and electrical properties was carried out. The results showed that Mg doping could reduce the grain size of CCTO films and improve the dielectric constant and frequency stability.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Engineering, Electrical & Electronic
Anamitra Chattopadhyay, Jhasaketan Nayak
Summary: The dielectric response of CCTO ceramics has been improved by adjusting the pH value of precursor solution and shortening the sintering time. The pH-adjusted CCTO powder shows significantly enhanced dielectric response and can be used as a multifunctional material for humidity sensors and energy storage devices at room temperature.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Physics, Applied
Zhen Zhang, Shengwen Shu, Zhiguo Wang, Zhengqiu Xie, Huizhong Wang, Chunchun Li, Shanming Ke, Longlong Shu
Summary: In this study, the interplay of flexoelectricity and permittivity in CCTO ceramic was systematically studied. An abnormal flexoelectric transition was observed at 95℃. It was found that below this critical temperature, the barrier layer mechanism dominates the flexoelectricity in CCTO ceramic, while above this critical temperature, the flexoelectric response mainly originates from the contributions of semiconducting grains and insulating grain boundaries.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Jakkree Boonlakhorn, Narong Chanlek, Sriprajak Krongsuk, Prasit Thongbai, Pornjuk Srepusharawoot
Summary: In this study, CaCu3-xMgxTi4O12 ceramics were successfully prepared via a chemical combustion method. Mg-doped CaCu3Ti4O12 ceramics exhibited high dielectric permittivities and low loss tangents. The enhanced dielectric properties in the doped ceramics were attributed to an enhanced grain boundary response. First-principles calculations revealed the interaction between Mg atoms and the suppression of oxygen loss during the sintering process in CaCu2.90Mg0.10Ti4O12 ceramics, resulting in an increased grain boundary resistance. The internal barrier layer capacitor (IBLC) model was found to be the primary origin of the colossal dielectric response in all CaCu3-xMgxTi4O12 ceramics studied.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Ceramics
Jutapol Jumpatam, Jirata Prachamon, Jakkree Boonlakhorn, Nutthakritta Phromviyo, Narong Chanlek, Prasit Thongbai
Summary: A solid-state reaction method was used to prepare CaCu3-xMgxTi4O12-2xF2x ceramics with different Mg and F co-doping ratios. The effect of doping ratio on the structure and properties of the ceramics was studied.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2022)
Article
Materials Science, Ceramics
Bhoomika Yadav, Kamal K. Kar, Manas K. Ghorai, Devendra Kumar
Summary: AC electrical measurements were conducted on iodine-doped CaCu3Ti4O12-xIx ceramic specimens. The crystalline structure, microstructure, and oxidation state of various ions were analyzed using XRD, SEM, and XPS. Dielectric relaxations in different compositions were investigated and similar charge carriers were found in conduction and relaxation processes. The XPS study revealed a reduction in [ VO center dot center dot ] concentration and an increase in [ V '' M] with increasing iodine concentration. Metal ions were found to segregate at grain boundaries, leading to increased resistivity and minimized dielectric losses. A high concentration of iodine doping promoted the formation of a barrier layer capacitor.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Jakkree Boonlakhorn, Narong Chanlek, Jedsada Manyam, Pornjuk Srepusharawoot, Sriprajak Krongsuk, Prasit Thongbai
Summary: In this study, greatly enhanced breakdown electric field and nonlinear coefficient with reduced tan delta were achieved by simultaneous partial substitution of CCTO with acceptor-donor (Al3+, Ta5+) dopants to produce (Al3+, Ta5+)-CCTO ceramics. The improved electrical properties were attributed to the synergistic effects of the co-dopants in the doped CCTO structure, leading to enhanced grain boundary resistance. These results provide useful guidelines for developing new giant dielectric ceramics with excellent dielectric properties.
JOURNAL OF ADVANCED CERAMICS
(2021)
Article
Materials Science, Ceramics
A. Balamurugan, R. Shunmuga Priya, Priyanka Chaudhary, E. Ranjith Kumar, T. Indumathi, Ch Srinivas, B. C. Yadav, D. L. Sastry
Summary: The effects of lemon juice and annealing treatment on the phase composition, vibrational modes, microstructural and dielectric behavior of Mg doped copper ferrite nanoparticles were studied in detail. The results showed that annealing treatment improved the crystallite size and dielectric properties of the samples, and also affected their magnetic behavior.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Yong Guo, Junlang Tan, Jingchang Zhao
Summary: NaF was composited into CCTO with excess Ti to prepare NaF/CCTO composite ceramics, and its physical and chemical properties were characterized. HRTEM revealed particle deposition on CCTO surface. FESEM showed the presence of nanocrystalline structures inside the grains in NaF/CCTO composite ceramics. Dielectric spectroscopy confirmed the significant improvement of CCTO's dielectric properties by NaF and excessive Ti. The dielectric constant of NaF-0.1 sample reached 2.7 x 106 and 5.1 x 105 at 20 Hz and 1 kHz, respectively.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Composites
Dongguang Zhang, Yaqi Zhong, Yali Wu, Xingfang Zhang, Michael D. Dickey, Jiayi Yang
Summary: Flexible and soft capacitive stress sensors are commonly used in various applications due to their desirable properties, and by increasing the dielectric constant and mimicking the Venus flytrap's trigger hair structure, the sensitivity and potential applications of the sensors are improved.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Chayma Abed, Amira Ben Gouider Trabelsi, Fatemah H. Alkallas, Susana Fernandez, Habib Elhouichet
Summary: Magnesium-doped zinc oxide nanocrystals were fabricated through a sol gel method. The impact of magnesium concentration on the structure, electrical, and dielectric characteristics of the nanocrystals was investigated. The results showed that the magnesium content affected the conductivity, impedance spectra, dielectric constant, and Debye-like relaxation behavior. The nanocrystals with 3% magnesium doping exhibited a large dielectric constant. These findings highlight the importance of magnesium-doped zinc oxide nanocrystals for device applications and energy storage.
Article
Engineering, Electrical & Electronic
Keenan Zhihong Yap, Wei Yin Lim, Ashish Kalkal, P. Gopinath, Narayanan Ramakrishnan
Summary: In this study, a capacitive sensor coated with graphene oxide (GO) was developed for humidity sensing. The GO was directly deposited on gold interdigital electrodes (IDE) using electrophoretic deposition (EPD) technique, and functionalized with magnesium ions. The sensor exhibited ultrahigh sensitivity and stability at different humidity levels.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Chih Chin Yang, Chih Cheng Wu, Yu Liang Hsiao, Zong Hsien Wu, Shun Hsyung Chang, Hung Yu Wang, Chih Lung Shen
Summary: In this research, a capacitance humidity sensor with a nitrogen-doped zinc oxide (N-doped ZnO) sensing film has been developed. The sensing film acts as a semiconductor with p-type hole carriers. The addition of a polymer buffer layer on the sensing film affects the carrier concentration and carrier mobility. The measurements demonstrate the capacitance effect and sensitivity of the sensor.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2022)
Article
Materials Science, Ceramics
Pu Mao, Gang Lu, Qingsong Yan, Anil Annadi, Yongguang Guo, Zepeng Wang, Zhiyong Liu, Bing Xie, Lixue Zhang
Summary: In this study, the effects of different metal electrodes (Ag, Au and Pt) on the electrical properties of CCTO ceramics were systematically investigated. The results showed that the metal electrode had minimal effect on the dielectric constant, but significant effect on the dielectric loss. The Ag electrode was found to be more suitable for characterizing the electrical performances of CCTO ceramics.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Sukhanidhan Singh, Abhinav Yadav, Manisha Kumari, P. M. Sarun
Summary: The preparation and properties of CCTO ceramics prepared by SSR technique were studied, showing that the ceramics have a giant dielectric constant and low porosity, making them suitable for capacitor applications. The results were confirmed through XRD and FE-SEM analyses, as well as dielectric and electrical property investigations in various temperature and frequency ranges.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
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)