Article
Materials Science, Ceramics
M. Boomashri, P. Perumal, K. V. Gunavathy, Fatemah H. Alkallas, Amira Ben Gouider Trabelsi, Mohd Shkir, S. AlFaify
Summary: This paper investigates the gas-sensing properties of Sb-doped SnO2 thin films prepared through nebulizer-assisted spray pyrolysis. The results show that 0 to 5 wt% Sb doping improves the inherent characteristics of the transparent conducting oxide. The 2-wt%-Sb-doped SnO2 film exhibits a high response rate and suitable characteristics to detect 250 ppm ammonia as a gas sensor.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Zhaohua Wang, Mingfeng Zhi, Manzhang Xu, Chen Guo, Zhenwu Man, Zhiyong Zhang, Qiang Li, Yuanyuan Lv, Wu Zhao, Junfeng Yan, Chunxue Zhai
Summary: Sb-doped SnO2/ZnO nano-heterojunctions were prepared using a microwave hydrothermal method, and the effects of Sb-doping on the morphology and gas sensor performance of SnO2/ZnO NHs were studied in detail. The study found that Sb-doping changed the morphology of SnO2 and enhanced the gas sensor response.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Analytical
Zhifu Feng, Andrea Gaiardo, Matteo Valt, Barbara Fabbri, Davide Casotti, Soufiane Krik, Lia Vanzetti, Michele Della Ciana, Simona Fioravanti, Stefano Caramori, Alberto Rota, Vincenzo Guidi
Summary: Tin dioxide (SnO2) is a commonly used semiconductor for gas sensing applications, but its lack of selectivity and sensitivity to humidity limit its potential usage. This study focused on highly doped SnO2:Sb and found that it exhibits high selectivity to NO2 with good sensitivity and limited influence from humidity.
Article
Chemistry, Multidisciplinary
Xingtai Chen, Tao Liu, Ran Wu, Jingkun Yu, Xitao Yin
Summary: Pd-modified Sb-doped SnO2 nanomaterials were prepared using a hydrothermal reaction and reduction method. The samples exhibited uniform doping of Sb within the SnO2 lattice and successful incorporation of Pd on the surface. Compared to pristine SnO2, the material with 3 mol% Sb doping and 7 wt% Pd decoration showed the highest response to hydrogen gas at high temperature, as well as excellent selectivity and cycling stability. The improved sensing performance was attributed to changes in the energy band structure, lattice distortion-induced oxygen vacancies, and strong metal-support interaction between Pd and SnO2.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Mohini Panday, Gaurav K. Upadhyay, L. P. Purohit
Summary: Antimony-doped SnO2 thin films were prepared and tested as gas and humidity sensors. The results showed that the doping of antimony can significantly affect the optical and electrical properties of the films, leading to excellent sensing response at different temperatures and humidities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Guanyu Yao, Jun Yu, Hao Wu, Zhongzhou Li, Wenjing Zou, Huichao Zhu, Zhengxing Huang, Hui Huang, Zhenan Tang
Summary: Antimony-doped tungsten oxide nanosheet-assembled microspheres were synthesized via hydrothermal method, showing excellent sensitivity, fast response, and low detection limit for ammonia at near room temperature.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Fanli Meng, Zhijia Liao, Chaoyang Xing, Zhenyu Yuan, Renze Zhang, Hongmin Zhu, Jin Li
Summary: SnO2/SiO2 nanocomposites were prepared by the sol-gel method, demonstrating superior gas sensing properties and the ability to detect triethylamine at a minimum concentration of 500 ppb.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Wu Hao, Yu Jun, Li Zhongzhou, Yao Guanyu, Cao Rui, Li Xiaogan, Zhu Huichao, He Aixiang, Tang Zhenan
Summary: The study fabricated high-performance, low-power microhotplate gas sensors through advanced electrohydrodynamic printing, loaded with PdO/PdO2-SnO2:Sb materials for detecting various volatile organic compounds. The gas sensing performance is regulated by different concentrations of PdO/PdO2, and the identification of VOCs is achieved through principal component analysis.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Li Wang, Shuyi Ma, Xiaoli Xu, Jianpeng Li, Tingting Yang, Pengfei Cao, Pengdou Yun, Shengyi Wang, Ting Han
Summary: In this study, terbium-doped SnO2 nanotubes were synthesized and characterized for gas sensing applications. XPS analysis revealed that 7% terbium-doped SnO2 showed the best sensitivity to ethanol at 100 ppm, reaching 53.6 at 200 degrees Celsius. The doping of terbium increased the number of active sites on the surface of SnO2, enhancing gas sensitivity and electrical responsiveness.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Li Wang, Shuyi Ma, Jianpeng Li, Andong Wu, Didi Luo, Tingting Yang, Pengfei Cao, Nina Ma, Yahui Cai
Summary: This work presents a method for synthesizing Mo-doped SnO2 nanotubes with uniform morphology, which enhances gas adsorption by creating new lattice defects. The optimal doping concentration of transition metal elements is essential for achieving the best sensing response in metal-oxide NTs gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Liupeng Zhao, Xueqin Gong, Wei Tao, Tianshuang Wang, Xiaomin Liu, Fangmeng Liu, Xu Yan, Chenguang Wang, Peng Sun, Geyu Lu
Summary: The challenge of low-valence cation doping in SnO2 materials lies in the detrimental effect of sharply elevated baseline resistance on sensor stability and signal acquisition. However, homovalent doping has little impact on resistance but the effective dopant is scarce. It has been found that the non-metallic element Se readily forms cationic SeSn defects in SnO2, improving sensitivity of SnO2-based sensors with a moderate increase in baseline resistance. The sensitivity enhancement is attributed to the higher activity of adsorbed oxygen on the surface of Se-doped SnO2, allowing for sufficient sensing-reactions and charge transfer at high temperatures.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Nanoscience & Nanotechnology
Ramarajan Ramanathan, Selvakumar Nagarajan, Venkataramana Bonu, Priyanka Patel, Shubhangi Jamdar, Harish C. Barshilia, Ramesh Chandra Mallik
Summary: Thin film technology offers possibilities and advancements in gas sensor devices. Sb-doped nanometer thin-SnO2 films were developed for CO/NH3 gas detection. The structural, surface, optical, and resistivity properties were investigated as a function of film thickness. ATO thin films showed enhanced response towards CO/NH3 gas detection with better stability and selectivity for CO gas. The results indicate the potential application of nanometer ATO films for enhanced gas detection.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Ahmet Emre Kasapoglu, Saman Habashyani, Ali Baltakesmez, Demet Iskenderoglu, Emre Gur
Summary: This study successfully grew Sb-doped ZnO nanorods using a simple spray pyrolysis method, with XRD measurements indicating preferential c-axis (002) plane for all films, and no lattice distortion from Sb doping. Raman measurements showed Sb doping related modes, especially defect related, in ZnO nanorods, with excellent hydrogen gas sensor performance demonstrated by a 5.0 wt% Sb-doped ZnO nanorod sample.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Yan-Fang Song, Jia-Man Liu, Fang Ge, Xin Huang, Yi Zhang, Hong-Hua Ge, Xin-Jing Meng, Yu-Zeng Zhao
Summary: Ti/Sb/SnO2 electrodes doped with different proportions of Nd were prepared by thermal decomposition method, and the effect of Nd-doping amount on the electrode performance was studied. The Ti/Sb/SnO2-Nd electrode doped with 1% Nd showed improved crystallinity, higher voltampere charge, increased oxygen evolution potential, extended service life, and higher degradation efficiency compared to the Ti/Sb/SnO2 electrode without Nd-doping. Overall, the Ti/Sb/SnO2-Nd electrode doped with 1% Nd exhibited high electrocatalytic oxidation activity and good stability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Zhilong Song, Zhixiang Hu, Jingyao Liu, Jia Yan, Huaming Li, Jianjun Jiang, Jiang Tang, Huan Liu
Summary: The study introduces a metastable Sb-doping strategy to achieve high sensitivity in SnO2 quantum wires back channels, allowing for rapid and sensitive detection of gases like H2S. Through optimization of doping amounts, structural and morphological properties, fast and sensitive detection of gases is achieved, paving the way for gas sensors with low power consumption and excellent integration compatibility.
ADVANCED ELECTRONIC MATERIALS
(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
Thermodynamics
M. F. B. Stodt, Jan Derk Groeneveld, Lutz Maedler, Johannes Kiefer, Udo Fritsching
Summary: This study investigates the occurrence of in-flight droplet microexplosions (mu-explosions) during flame spray pyrolysis and confirms the findings through single drop experiments. It is found that there are distinct mu-explosions happening at high frequencies during the synthesis of iron oxide nanoparticles. This finding is significant for understanding the role and relevance of mu-explosions in the production and formulation of functional nanoparticles.
COMBUSTION AND FLAME
(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
Ming Zhou, Yu Yao, Yutong Han, Lili Xie, Xueling Zhao, Nicolae Barsan, Zhigang Zhu
Summary: In2O3/CNH nanocomposites with different CNH concentrations were prepared via a facile solvothermal route, and their H2S sensing performance was tested. The optimal composition was found to be In2O3/CNH (2 wt%) with a sensor signal close to 3000 at an operating temperature of 70 degrees C for 2ppm H2S, showing excellent selectivity, low humidity impact, good reproducibility, and stability. The superior sensor performance is attributed to the formation of a p-n junction between CNH and In2O3, resulting in increased surface band bending and sensor response.
SENSORS AND ACTUATORS B-CHEMICAL
(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
Engineering, Chemical
Stefan Christian Endres, Lutz Maedler
Summary: Accurate computation of interface curvature is crucial in simulating surface tension-dominated systems. Prior research has shown that a formulation using discrete differential geometry can find exact equilibrium solutions of surfaces, but fails to provide accurate point-wise estimates for curvatures of particle-particle capillary liquid bridges. This communication elaborates on the use of total curvatures in computing forces of parameterized models and demonstrates the infeasibility of using point-wise estimates on any asymmetric discretization.
CHEMIE INGENIEUR TECHNIK
(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
Chemistry, Physical
Beeke Gerken, Christoph Mahr, Jakob Stahl, Tim Grieb, Marco Schowalter, Florian F. Krause, Thorsten Mehrtens, Lutz Maedler, Andreas Rosenauer
Summary: Hetero-contacts are interfaces between different materials at the nanoscale leading to novel functional properties. In hetero-aggregates, primary particles of at least two different materials are mixed at primary particle or cluster level. Double flame spray pyrolysis (DFSP) is a versatile technique for the controlled synthesis of such materials. Characterization of hetero-aggregates by scanning transmission electron microscopy (STEM) requires acquisition and evaluation of many aggregate images in order to derive statistically significant results. Usually, STEM energy dispersive X-ray spectroscopy (EDXS) is used to acquire elemental maps providing the material distribution of the primary particles within hetero-aggregates. However, the acquisition of a single EDXS map takes up to several minutes. For this reason, determination of material types of primary particles from the intensity in high-angle annular dark field STEM images alone is desirable. These images can be acquired within a couple of seconds. In the present work, a method is suggested which allows for achieving this objective. It can be applied to distinguish materials with a significant difference in their atomic number and hence sufficient material contrast in the STEM images.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2023)
Article
Thermodynamics
Arne Witte, Lutz Maedler
Summary: Flame spray pyrolysis (FSP) is a powerful and versatile technique for synthesizing functional nanoparticles. The study of isolated burning FSP droplets is crucial for understanding and improving this technique. In this study, the burning process of single droplets with different sizes and the effect of solvent composition were investigated. The results provide insights into droplet combustion and the use of low-cost precursor-solvent systems in FSP.
APPLICATIONS IN ENERGY AND COMBUSTION SCIENCE
(2023)
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)
