Article
Electrochemistry
A. M. Oje, A. A. Ogwu, Alex Oje
Summary: The deposition parameters during the sputtering process play a critical role in determining the properties of thin film coatings. This study investigated chromium oxide thin films prepared under different RF powers and characterized their work function and corrosion stability. The findings showed that films prepared at a deposition power of 300 W and an oxygen flow rate of 10 sccm exhibited better corrosion resistance and higher work function values, suggesting a correlation between corrosion, work function, and defect density.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Yong Feng, Yupeng Li, Xuetong Zhao, Xia Zhao, Men Guo, Lijun Yang, Ruijin Liao
Summary: The electrical performance and power loss issues in the accelerated direct current (DC) aging of NiO-doped ZnO varistor ceramics are studied. The results show that the addition of NiO improves the breakdown field and nonlinearity of the material. After accelerated aging test, it is found that the decrease in breakdown field and nonlinearity is more significant in the reverse direction, while the increase in leakage current density is also more pronounced in the reverse direction. The analysis of the electric modulus spectra indicates that the accelerated aging test mainly affects the relaxation associated with grain boundary defects. Therefore, appropriate doping of NiO can improve the electrical stability of the material during DC aging.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Alessio Mezzi, Eleonora Bolli, Saulius Kaciulis, Alessandro Bellucci, Barbara Paci, Amanda Generosi, Matteo Mastellone, Valerio Serpente, Daniele Maria Trucchi
Summary: Thin films of scandium oxide (Sc2O3) were deposited on silicon substrates to study the effect of thickness on work function reduction. Various measurements, including X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), energy dispersive X-ray reflectivity (EDXR), atomic force microscopy (AFM), and ultraviolet photoelectron spectroscopy (UPS), were performed on the films of different nominal thicknesses (ranging from 2-50 nm) and in multi-layered mixed structures with barium fluoride (BaF2) films. The results showed that non-continuous films were necessary to minimize the work function, even with a stoichiometry far from ideal (Sc/O = 0.38), due to the formation of surface dipole effects between crystalline islands and substrates. Furthermore, the presence of BaF2 in multi-layered films did not contribute to further work function reduction.
Article
Chemistry, Physical
Qi Liu, Yurun Miao, Luis Francisco Villalobos, Shaoxian Li, Heng-Yu Chi, Cailing Chen, Mohammad Tohidi Vahdat, Shuqing Song, Deepu J. Babu, Jian Hao, Yu Han, Michael Tsapatsis, Kumar Varoon Agrawal
Summary: This study reports a crystallization method that allows for the synthesis of ZIF thin films with a thickness as thin as a single structural unit. The thin films exhibited high H2 separation performance and could potentially accelerate the development of metal-organic framework films for efficient membrane separation.
Article
Materials Science, Ceramics
Chengcai Ye, Yunxia Zhao, Yanrui Li, Xing Zhao, Min Li, Jing Shi, Xiao Liu
Summary: This work investigates the influence of the preparation process on the structure and conduction mechanisms of Bi0.5Na0.5TiO3 (BNT)-based complexes. It is found that the ceramics prepared by tape-casting exhibit a rutile titanium dioxide phase, while the ceramics prepared by conventional solid-state reaction show a pure perovskite phase. The ac impedance spectra reveal different conductive behaviors in the two preparation routes. This study highlights the importance of the preparation route in the structure and conduction mechanisms of BNT-based oxide ionic conductive materials.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Linhao Li, Brant Walkley, Ian M. Reaney, Derek C. Sinclair
Summary: Low levels of impurities can significantly impact the electrical properties of metal oxides, influencing defect chemistry and conduction mechanisms. High purity reagents are crucial in studying ferrite-based perovskites to achieve accurate results.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Maxwell T. Robinson, Julie Tung, Meysam Heydari Gharahcheshmeh, Karen K. Gleason
Summary: The humidity-initiated gas (HIG) sensors employ the impedance of water assembled at sensor interfaces when exposed to humidity to sense VOCs at low concentrations. Type II sensors outperform Type I sensors in terms of key performance metrics, achieving <2 min response times and <10 ppb detection limit for VOCs.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Prajna P. Mohapatra, Pamu Dobbidi
Summary: The demand for ferrites in the form of thin films has increased due to the growth in microwave and semiconductor industries. LiDy0.1Fe4.9O8 films and their capacitors with different thicknesses were fabricated using PLD. The properties of the films were influenced by lattice mismatch, grain size, and magnetoelastic energy density. The varying thickness of the film was found to be an effective parameter for tuning its physical properties.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
K. Iben Nassar, N. Rammeh, Silvia Soreto Teixeira, M. P. F. Graca
Summary: In this study, the double perovskite oxide LBAFMO was prepared using the sol-gel-based Pechini method, and its electrical properties were studied through impedance spectroscopy and X-ray diffraction analysis. The results showed that LBAFMO exhibited non-Debye model relaxation, with complex impedance indicating contributions from grain and grain boundaries, and AC conductivity following Jonscher's law.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Rafik Moussi, Amira Bougoffa, Abdessalem Trabelsi, Essebti Dhahri, M. P. F. Graca, M. A. Valente, R. Barille
Summary: This study investigated the impact of substituting barium (Ba) with strontium (Sr) in the BaTiO3 perovskite lattice, synthesized via the conventional solid-state method. Various analyses were conducted, confirming changes in physical properties after Sr substitution.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Nikola Ilic, Guilhermina F. Teixeira, Jelena Bobic, Vojislav Spasojevic, Adis Dzunuzovic, Mirjana Vijatovic Petrovic, Maria A. P. Zaghete, Biljana Stojanovic
Summary: Bismuth ferrite powders were synthesized by auto-combustion method with glycine as a fuel, and doping with ions of different valence was used to study their influence on electrical conductivity and ferroelectric properties. The flexible composite samples, formed by mixing and hot-pressing powders with alpha-PVDF, exhibited improved electrical resistivity and dielectric properties.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Ceramics
J. P. Liu, Z. L. Lv, Y. X. Hou, L. P. Zhang, J. P. Cao, H. W. Wang, W. B. Zhao, C. Zhang, Y. Bai, K. K. Meng, X. G. Xu, Jun Miao
Summary: Multi-element doping is an effective method to suppress leakage in BiFeO3 films. As the number of doping elements increases, the leakage current density of the BFO films decreases, and the conduction mechanism changes.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Bohan Xu, Patrick D. Lomenzo, Alfred Kersch, Thomas Mikolajick, Uwe Schroeder
Summary: Si-doped ZrO2 thin films exhibit ferroelectric behavior and the ferroelectric properties can be modulated by Si dopants. The monoclinic and orthorhombic phases decrease, while the tetragonal phase increases with increasing Si-doping content in ZrO2 films. The ZrO2 films show antiferroelectric characteristics at room temperature and lower temperatures.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Bing Yan, Li Feng, Jiaojiao Zheng, Qian Zhang, Shaohua Jiang, Chunmei Zhang, Yichun Ding, Jingquan Han, Wei Chen, Shuijian He
Summary: In this study, the researchers designed a thick carbon electrode to improve the performance of electrical double-layer supercapacitors under harsh conditions. By utilizing an ultrahigh mass loading from carbonization and activation of basswood, the supercapacitor was able to operate at fast charge/discharge rates, ultralong cycle life, and ultralow temperature. The carbon electrodes inherited the vertical channels of basswood, enhanced ion penetration and mass transport, and possessed rational micro/meso-sized pores and oxygen-containing functional groups induced by H2O2 activation. As a result, the supercapacitor achieved appreciable capacitive performance even with an ultrahigh mass loading and at ultralow temperatures.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Jiao Bai, Weiwei Xie, Weiqi Zhang, Zhipeng Yin, Shengsheng Wei, Dehao Qu, Yue Li, Fuwen Qin, Dayu Zhou, Dejun Wang
Summary: In this study, the conduction mechanism and impedance analysis of TiN/HfOx/Pt resistive-switching memory devices in both the low resistance state (LRS) and high resistance state (HRS) were investigated. It was found that the conduction in LRS was dominated by Ohmic conduction, while in HRS it was controlled by trap-controlled space-charge-limited current conduction. XPS analysis results showed the presence of oxygen vacancies on the surface of the HfOx film. An equivalent physical model related to oxygen vacancies in the HfOx film was established using ac impedance spectroscopy method. The activation energy of dc and ac in HRS was discussed and it was found that the conduction occurred at the grain boundary.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Applied
Benjamin Junker, Marco Favaro, David E. Starr, Michael Havecker, Udo Weimar, Nicolae Barsan
Summary: The development of near ambient pressure x-ray photoelectron spectroscopy (NAP-XPS) has provided a valuable and powerful tool for spectroscopic investigations of solid-gas interfaces. By observing the changes in parameters such as chemical shifts, band bending, and valence band structure, the study on a Pt doped SnO2 sample using NAP-XPS at a synchrotron highlights the potential of this method in gas sensor research. Furthermore, DC resistance measurements have shown that the electronic characteristics and surface composition under NAP-XPS conditions are different from those at atmospheric pressure.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Analytical
S. Braun, A. Kobald, A. Oprea, I Boehme, P. Bonanati, U. Weimar, N. Barsan
Summary: This study introduces a new method for monitoring hand hygiene compliance of healthcare workers using commercial Ethanol gas sensors. Different machine learning algorithms are applied to categorize hand disinfection techniques as correct or incorrect, with the stationary sensor setup showing significantly higher accuracy compared to the portable setup.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Abdulaziz A. Alharbi, A. Sackmann, U. Weimar, N. Barsan
Summary: The research discovered that the nature of electrode materials impacts sensor performance, with platinum electrodes showing good responses to both ethylene and acetylene at 150 degrees Celsius, while gold electrodes only showed a good response to acetylene. Regardless of the electrode material, the surface reaction responsible for sensor signals occurs for acetylene, with platinum required for the reaction to occur in the case of ethylene.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Yang Liu, Ugur Geyik, Arne Kobald, Aijun Yang, Xiaohua Wang, Udo Weimar, Mingzhe Rong, N. Barasan
Summary: This study investigated the sensing performance of various commercial and homemade sensors in dry and humid conditions for monitoring the gas composition around power cables. The sensors showed different responses to gases such as 2-EH, DOTP, and benzene with potential for distinguishing between them using a sensor array and PCA method. However, a more refined pattern recognition method is necessary to accurately differentiate between 2-EH and DOTP.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Nanoscience & Nanotechnology
Muhammad Hamid Raza, Roberto Di Chio, Kaveh Movlaee, Patrick Amsalem, Norbert Koch, Nicolae Barsan, Giovanni Neri, Nicola Pinna
Summary: Heterostructures made from metal oxide semiconductors (MOS) are crucial for high-performance gas sensors. This study explores the transduction mechanism of heterostructured nanomaterials and relates the sensing response to the MOS shell or the p-n heterojunction. The use of carbon nanotubes as conductive substrates enables the devices to operate at low temperature. The findings are important for the development of next generation gas sensing devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Xiao-Xue Wang, Benjamin Junker, Carolin Ewald, Udo Weima, Xin Guo, Nicolae Barsan
Summary: Light-excited gas sensors have potential applications in reducing working temperature and power consumption. However, the mechanistic understanding of these sensors is still lacking. In this study, we demonstrate for the first time the feasibility of performing operando diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy measurements on illuminated sensors, revealing the reason for increased sensor resistance under high humidity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Analytical
Anna Staerz, Udo Weimar, Nicolae Barsan
Summary: This review focuses on the mechanism and surface reactions of metal oxide gas sensors. Recent studies have revealed the complexity of surface reactions and discussed the influence of other adsorbates on sensor response.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Corneliu Ghica, Catalina G. Mihalcea, Cristian E. Simion, Ioana D. Vlaicu, Daniela Ghica, Ion V. Dinu, Ovidiu G. Florea, Adelina Stanoiu
Summary: This paper aims to identify the interaction mechanism between CO2 and chemical sensors based on Gd-doped SnO2, SnO2, and Gd2O3 powders. The presence of humidity can offset the low reactivity of CO2. Gd concentration was varied to determine the limit for Gd integration as a doping ion. The change in electrical resistance is influenced by the density of oxygen vacancies or compensation for opposite behaviors in the SnO2-Gd2O3 nanocomposite structure. CO2 exposure to humidity leads to specific chemical interactions on the surfaces of SnO2 and Gd2O3.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Adelina Stanoiu, Corneliu Ghica, Catalina G. Mihalcea, Daniela Ghica, Simona Somacescu, Ovidiu G. Florea, Cristian E. Simion
Summary: By varying the calcination temperature, the crystallinity and surface chemistry of synthesized NiO materials can be controlled, thus affecting their CO sensing mechanism.
Article
Materials Science, Multidisciplinary
Cristian E. Simion, Ioana D. Vlaicu, Alexandra C. Iacoban, Catalina G. Mihalcea, Corneliu Ghica, Adelina Stanoiu
Summary: This study investigates the influence of synthesis methods on the CO2 sensitivity of Gd2O3. The rare-earth oxide was prepared through wet chemical co-precipitation and hydrothermal methods. The obtained powders were deposited as thick films and compared in terms of crystallographic phase and sensing properties. The study reveals the variation in electrical resistance of Gd2O3 due to CO2 concentrations and relative humidity, suggesting a CO2 interaction mechanism based on induced dipoles.
MATERIALS CHEMISTRY AND PHYSICS
(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
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
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
Yu Yao, Yutong Han, Ming Zhou, Lili Xie, Xueling Zhao, Zifeng Wang, Nicolae Barsan, Zhigang Zhu
Summary: Researchers improved the stability and electrical properties of MXenes by introducing MoO3 with oxygen vacancies and a ternary heterostructure, and successfully developed a gas sensor based on MoO3/TiO2/Ti3C2Tx. This sensor exhibits stability under high oxidation conditions and has a 20-40 times higher response to various volatile organic compounds compared to the pristine sensor, with a unique response to isopropanol vapor.
JOURNAL OF MATERIALS CHEMISTRY A
(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)
