Sensors and Actuators B: Chemical最新文献_第8页

Recognition and quantification of different VOCs by using impedance-spectroscopy-based gas sensors 基于阻抗光谱的气体传感器对不同VOCs的识别和量化

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-08 DOI: 10.1016/j.snb.2025.138298

Jin-Young Kim, Somalapura Prakasha Bharath, Ali Mirzaei, Sang Sub Kim, Hyoun Woo Kim

{"title":"Recognition and quantification of different VOCs by using impedance-spectroscopy-based gas sensors","authors":"Jin-Young Kim, Somalapura Prakasha Bharath, Ali Mirzaei, Sang Sub Kim, Hyoun Woo Kim","doi":"10.1016/j.snb.2025.138298","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138298","url":null,"abstract":"Pristine SnO2 and WO3 nanostructures decorated with gold and palladium were fabricated to detect volatile organic compounds (VOCs), including acetone, benzene, ethanol, formaldehyde, toluene, and xylene, under dry and humid conditions. Direct and alternating current signals were collected, and multilayer perceptron (MLP), convolutional neural network (CNN), and long short-term memory (LSTM) models were employed to differentiate among the VOCs. The transient variations in resistance was used as a fingerprint to identify VOCs. Normalized resistance signals were used as inputs to train the neural-network-based models to circumvent feature extraction and response calculation. The real and imaginary contributions of AC impedance was analyzed to determine the sensing properties. The relaxation behaviour of SnO2 and WO3 facilitated calculation of tunable responses for different frequencies. Different technique was used to compare multiple instantaneous <math><msup is=\"true\"><mrow is=\"true\"><mi is=\"true\">Z</mi></mrow><mrow is=\"true\"><mo is=\"true\">″</mo></mrow></msup></math> values at different frequencies to quantify the responses. The methods were validated using different sensors and VOCs in dry and humid atmospheres. Impedance spectra from different sensors in various VOC atmospheres were converted to pixelated images and CNN and LSTM models were adopted to discriminate different VOCs. A discrimination efficiency of 100% was achieved in cross-validated training and testing procedures for all collected data.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"21 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping gaseous ethanol in the headspace of wine glasses with an interband cascade laser sensor 用带间级联激光传感器在酒杯顶空间测绘气态乙醇

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-07 DOI: 10.1016/j.snb.2025.138216

Florian Lecasse, Raphaël Vallon, Clément Jacquemin, Vincent Alfonso, Clara Cilindre, Bertrand Parvitte, Virginie Zéninari, Gérard Liger-Belair

引用次数: 0

Elastomeric Deformation-Assisted Nanochannel Fabrication using Electrospun Polymer Fibers for Micro/Nanofluidic System 微/纳米流体系统中电纺聚合物纤维弹性变形辅助纳米通道的制备

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-07 DOI: 10.1016/j.snb.2025.138281

Seungbin Yoon, Hyeonsu Woo, Geon Hwee Kim, Seung Min Kang, Woonjae Choi, Suhyeon Kim, Geunbae Lim

{"title":"Elastomeric Deformation-Assisted Nanochannel Fabrication using Electrospun Polymer Fibers for Micro/Nanofluidic System","authors":"Seungbin Yoon, Hyeonsu Woo, Geon Hwee Kim, Seung Min Kang, Woonjae Choi, Suhyeon Kim, Geunbae Lim","doi":"10.1016/j.snb.2025.138281","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138281","url":null,"abstract":"In this study, we developed a novel, mass-producible, low-cost method for fabricating nanochannels by integrating electrospinning and elastomeric deformation techniques. Heat-treated electrospun polyvinylpyrrolidone (PVP) nanofibers form durable nanostructures that adhere to glass substrates. When this substrate is plasma-bonded to a polydimethylsiloxane (PDMS) block, the sandwiched nanofiber structures deform the PDMS along their edges, thereby creating nanochannels. The formation of these nanochannels was verified through both direct cross-sectional imaging and indirect observation of the nanofluidic phenomenon. The results showed that the nanochannel performance was influenced by the morphology and formation of the nanofibers, which could be easily controlled by adjusting the electrospinning time. Finally, we demonstrated continuous nanoparticle separation based on electrophoretic mobility, highlighting the potential of this technique for biological applications. The proposed method offers a simple and scalable alternative to conventional nanochannel fabrication methods, with enormous potential in micro/nanofluidic devices.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"21 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Screening of small molecules with varying inhibitory effects on islet amyloid peptide aggregation using liquid crystal-based sensors 利用液晶传感器筛选对胰岛淀粉样肽聚集具有不同抑制作用的小分子

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-07 DOI: 10.1016/j.snb.2025.138240

Ting-Hui Li, Jhih-Wei Huang, Chih-Hsin Chen, Ling-Hsien Tu

{"title":"Screening of small molecules with varying inhibitory effects on islet amyloid peptide aggregation using liquid crystal-based sensors","authors":"Ting-Hui Li, Jhih-Wei Huang, Chih-Hsin Chen, Ling-Hsien Tu","doi":"10.1016/j.snb.2025.138240","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138240","url":null,"abstract":"Islet amyloid polypeptide (IAPP) is a hormone co-secreted with insulin from pancreatic β-cells. Under pathological conditions, IAPP aggregates into cytotoxic oligomers and insoluble amyloid fibrils, impairing β-cell function and potentially contributing to type 2 diabetes (T2D). Although various methods have been developed to screen amyloid inhibitors, many are time-consuming and require specialized equipment. Here, we present a label-free liquid crystal (LC)-based sensing platform for monitoring IAPP aggregation in aqueous solutions. At the LC/aqueous interface where the LC adopts a homeotropic orientation, the formation of IAPP aggregates disrupts the LC ordering, resulting in a distinct dark-to-bright optical transition at concentrations as low as 250 nM. We showed that this transition resulted from the formation of peptide oligomers. By using this mechanism, the system effectively differentiates small molecules with varying inhibitory effects on IAPP aggregation, offering a clear visual readout of changes in LC alignment. This platform thus provides a straightforward and efficient tool for real-time monitoring of peptide aggregation and high-throughput screening of potential anti-amyloid and anti-oligomerization compounds, ultimately facilitating the development of therapeutic strategies against T2D and other amyloid-related disorders.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"21 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144569006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning–based six-channel dual-peak photonic nose for identifying real organophosphorus nerve agents and their simulants 基于机器学习的六通道双峰光子鼻识别有机磷神经毒剂及其模拟物

IF 8 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-07 DOI: 10.1016/j.snb.2025.138275

Jianan Wei , Ling Zhang , Junchao Yang , Molin Qin , Binyue Fan , Liu Yang , Shuya Cao

{"title":"Machine learning–based six-channel dual-peak photonic nose for identifying real organophosphorus nerve agents and their simulants","authors":"Jianan Wei , Ling Zhang , Junchao Yang , Molin Qin , Binyue Fan , Liu Yang , Shuya Cao","doi":"10.1016/j.snb.2025.138275","DOIUrl":"10.1016/j.snb.2025.138275","url":null,"abstract":"<div><div>The timely identification and characterization of chemical agents present in battlefield environments are crucial objectives for ensuring national public safety. In this study, we synthesized two polymers with distinct solubility parameters by encapsulating two styrene materials, each featuring different functional groups. The synthesized polymers were utilized as low-refractive-index layers and were alternately combined with three metal–organic frameworks that possessed varying refractive indices to construct multi-species photonic units. Based on the unique interactions of each photonic unit with different types of gases, we developed a six-channel photonic nose with dual-peak and dual-pattern recognition capabilities for distinguishing nine types of organophosphorus chemical agent gases. Moreover, for the first time, the photonic nose has been integrated with a machine learning algorithm to identify nerve agents. The developed photonic nose successfully detected four organophosphorus agents, including sarin, soman, VX and tabun, within 40 s, achieving an impressive accuracy rate of 100 %. Notably, by utilizing the algorithm, the developed photonic nose could effectively distinguish the organophosphorus nerve agents and their five common simulants. Additionally, the photonic nose was quantitatively evaluated using dimethyl methylphosphonate as a representative agent, yielding results that also demonstrated 100 % accuracy. Furthermore, the photonic nose sensor successfully identified mixed agents, highlighting its potential for monitoring public safety concerning organophosphorus nerve agents.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"444 ","pages":"Article 138275"},"PeriodicalIF":8.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microchannel-based portable sensor for p53 gene based on CRISPR/Cas12a using multimeter as readout 基于CRISPR/Cas12a的便携式p53基因微通道传感器，使用万用表作为读数

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-07 DOI: 10.1016/j.snb.2025.138274

Rong Huang, Shaohua Tian, Huabin Cai, Ying Bao, Dinglin Zhang, Qingrong Li, Zhenyu Lin

{"title":"Microchannel-based portable sensor for p53 gene based on CRISPR/Cas12a using multimeter as readout","authors":"Rong Huang, Shaohua Tian, Huabin Cai, Ying Bao, Dinglin Zhang, Qingrong Li, Zhenyu Lin","doi":"10.1016/j.snb.2025.138274","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138274","url":null,"abstract":"The DNA intensity modified on the surface of the inner wall of microchannel can regulate the resistance of the microchannel and which can be used to design biosensors for diverse targets. In this study, a portable biosensor based on the regulation of the charge density in microchannel using multimeter as redout had been designed for disease related DNA sequence detection (p53 gene had been chosen as model target). The inner wall of microchannel was functionalized with ssDNA firstly, where target p53 activated Cas12a via crRNA, whose cleavage activity altered the inner surface charge density, thereby changing resistance of the channel, which can be detected by a simple multimeter easily. Key operational parameters such as KCl concentration, CRISPR/Cas12a cleavage time, the concentration of modified ssDNA, and the amounts of Cas12a/crRNA complex were systematically optimized to enhance detection performance. Under optimized conditions, the changing of the resistance of the channel exhibited a linear relationship with the logarithm of p53 gene concentration ranging from 50 fM to 50 pM, achieving a detection limit of 15 fM (S/N = 3). The sensor demonstrated high sensitivity, specificity, and operational convenience, offering a promising point-of-care testing for disease related DNA detection.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"150 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluidic and Electrical Modular Interfacing: A modular approach to micro total analytical systems and micro gas chromatography 流体和电气模块接口：微全分析系统和微气相色谱的模块化方法

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-07 DOI: 10.1016/j.snb.2025.138273

Nipun Thamatam, Mustahsin Chowdhury, Masoud Agah

{"title":"Fluidic and Electrical Modular Interfacing: A modular approach to micro total analytical systems and micro gas chromatography","authors":"Nipun Thamatam, Mustahsin Chowdhury, Masoud Agah","doi":"10.1016/j.snb.2025.138273","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138273","url":null,"abstract":"Micro total analytical systems (μTAS) or lab-on-chip devices have emerged as powerful, miniaturized platforms for (bio)chemical analysis and engineering. They drastically reduce sample-reagent volume requirements, accelerate processing times, and enable automation, making them ideal for in-situ applications. However, integrating fluidic, electrical, and mechanical components within μTAS remains challenging due to design constraints, manufacturing complexities, diverse functionalities, demanding operating conditions, and incompatible maintenance procedures, ultimately hindering the widespread adoption of μTAS. Here, we present the standardized Fluidic and Electrical Modular Interfacing (FEMI) architecture, a scalable integration approach that combines modularity with the performance of monolithic integration. FEMI facilitates easy-to-remove, gas-tight, heat-resistant, low-dead-volume fluidic connections for microfluidic chips with side ports alongside detachable electrical interfaces by packaging the components as removable cartridges. To demonstrate its potential, we developed FEMI-GC, a micro gas chromatography (μGC) system for detecting trace levels of volatile organic compounds (VOCs). FEMI-GC includes a micro-preconcentrator (μPC) for sample preconcentration, a micro-separation column (μSC) for sample separation, and an off-the-shelf photoionization detector (PID) for compound detection, all within a compact footprint (3.75 L, 2 kg). It also features 3D-printed needle valves for precise flow control and a micro-fluidic routing board (μFRB) to direct flows through various stages. The interfacing could withstand operating temperatures >275 ˚C and pressures > 40 psi, enabling FEMI-GC to detect VOCs with a detection limit of 0.73 ppb and offer a tested detectable dynamic range of >50,000x. This work establishes FEMI as a scalable approach for allowing the rapid development and adoption of robust modular μTAS.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"12 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detection of Total Phosphorus Concentration in Seawater Based on SERS Spectroscopy and Adaptive Locally Weighted Visible Image Combined with Parallel Self Weighted Graph Neural Network 基于SERS光谱和自适应局部加权可见图像结合并行自加权图神经网络的海水总磷浓度检测

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-07 DOI: 10.1016/j.snb.2025.138271

Ying Chen, Chenglong Wang, Tianyu Zhang, Zhixin Sun, Qiguang Zhu, Liyong Niu, Dandan Zhu

{"title":"Detection of Total Phosphorus Concentration in Seawater Based on SERS Spectroscopy and Adaptive Locally Weighted Visible Image Combined with Parallel Self Weighted Graph Neural Network","authors":"Ying Chen, Chenglong Wang, Tianyu Zhang, Zhixin Sun, Qiguang Zhu, Liyong Niu, Dandan Zhu","doi":"10.1016/j.snb.2025.138271","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138271","url":null,"abstract":"Seawater eutrophication is a major global challenge for marine ecosystems, and accurate determination of total phosphorus (TP) concentration is crucial for monitoring and mitigating eutrophication. However, traditional detection methods often suffer from high costs, operational complexity, or limited detection sensitivity. To address these limitations, this study proposes a method for detecting TP in seawater based on surface-enhanced Raman spectroscopy (SERS) and graph neural networks (GNN). First, rhodamine 6 G (R6G)-modified silver nanoparticles (AgNPs) were utilized as the SERS active substrate to indirectly invert the total phosphorus concentration by combining the chemical products of phosphate ions and ammonium molybdate. Then, an Adaptive Local Weighted Visibility Graph (ALWVG) method was applied to transform SERS data, enhancing both local and global spectral features. Furthermore, a Parallel Self-Weighted Graph Neural Network (PSWGNN) was constructed, incorporating spectral chemical feature partitioning to achieve high-precision TP concentration prediction. Experimental results demonstrate that the proposed method achieves excellent detection performance in the 0–100 µg/L concentration range, with the R² of 0.996, the RMSE of 1.652 µg/L, the MAE of 1.138 µg/L, and the recoveries ranged from 97.20%-102.77%. Compared to traditional methods, this approach offers higher sensitivity, broader applicability, and better adaptation to complex aquatic environments. The findings suggest that the TP detection system based on SERS and ALWVG-PSWGNN provides an efficient, low-cost, accurate, and scalable solution for marine eutrophication monitoring.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"12 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differentiated imaging of Hashimoto's thyroiditis against Thyroid carcinoma by endogenous peroxynitrite activated near-infrared fluorescent probe 内源性过氧亚硝酸盐激活近红外荧光探针对桥本甲状腺炎与甲状腺癌鉴别成像的研究

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-07 DOI: 10.1016/j.snb.2025.138268

Wanwei Zhang, Mo Ma, Chen Zhao, Wenping Dong, Pinyi Ma, Daqian Song, Ying Sun

{"title":"Differentiated imaging of Hashimoto's thyroiditis against Thyroid carcinoma by endogenous peroxynitrite activated near-infrared fluorescent probe","authors":"Wanwei Zhang, Mo Ma, Chen Zhao, Wenping Dong, Pinyi Ma, Daqian Song, Ying Sun","doi":"10.1016/j.snb.2025.138268","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138268","url":null,"abstract":"Hashimoto's thyroiditis is one of the most common autoimmune diseases. Due to the similarity of the traits, traditional examination methods may misdiagnose it as thyroid cancer in some cases. Accurate diagnosis of Hashimoto's thyroiditis can avoid organ resection by misdiagnosis of thyroid cancer, preserve organ function for patients and reduce surgical trauma. Here, we designed and synthesized a near-infrared fluorescent probe named HNTC-HT for differentiated imaging of Hashimoto's thyroiditis against thyroid carcinoma. Reactive oxygen species (ROS), such as peroxynitrite (ONOO−), highly accumulated in Hashimoto's thyroiditis. While the content of ROS in thyroid cancer cells was significantly lower than that in Hashimoto's thyroiditis cells. ONOO− removes the trifluoromethanesulfonic acid group by affinity substitution reaction. And then HNTC-HT restores to fluorophore HNTC-OH which produces near-infrared fluorescence due to intramolecular charge transfer (ICT). We successfully perform differentiated imaging of Hashimoto's thyroiditis against thyroid carcinoma with HNTC-HT by the specific detection of intracellular ONOO−. The fluorescence brightness of thyroiditis cells is much higher than thyroid cancer cells, which proves that the probe HNTC-HT can be used to effectively differentiate Hashimoto's thyroiditis against thyroid cancer cells. Satisfactory results were also obtained in subsequent mouse experiments. In this work, the fluorescence probe HNTC-HT activated by ROS has been more appropriately applied, so as to address the limit in the misdiagnosis of Hashimoto's thyroiditis as thyroid cancer, thus expanding potential applications of near-infrared fluorescent probe in the diagnosis of thyroid disease.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"21 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144569007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasensitive NO2 sensor based on In2O3 nanocubes/SnS2 nanoflowers hetero composites 基于In2O3纳米立方/SnS2纳米花复合材料的超灵敏二氧化氮传感器

IF 8 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-07-07 DOI: 10.1016/j.snb.2025.138277

Haiying Du , Xianrong Li , Zhaorui Zhang , Qingyu Li , Long Zhao , Jing Wang

{"title":"Ultrasensitive NO2 sensor based on In2O3 nanocubes/SnS2 nanoflowers hetero composites","authors":"Haiying Du , Xianrong Li , Zhaorui Zhang , Qingyu Li , Long Zhao , Jing Wang","doi":"10.1016/j.snb.2025.138277","DOIUrl":"10.1016/j.snb.2025.138277","url":null,"abstract":"<div><div>The development of highly efficient nitrogen dioxide (NO₂) sensors with excellent performance and low concentration detection capabilities is urgently needed for environmental monitoring and human health protection. In this study, In2O3 nanocubes and SnS2 nanoflower composites were assembled by hydrothermal method, achieving ultrasensitive detection of NO2. The gas sensing test results indicate that the 7 wt% In2O3/SnS2 sensor exhibits significant NO2 gas sensing performance, with a high response value of 15.61 for 5 ppm NO2, which is approximately 5 times that of the SnS2 sensor (3.12). Additionally, the 7 wt% In2O3/SnS2 sensor demonstrates good response and recovery times (34 and 65 s, respectively), along with excellent cross-selectivity, humidity resistance, repeatability, and long-term stability. Moreover, this sensor achieves ppb-level detection of NO2. The excellent gas sensing performance is attributed to the 7 wt% In2O3/SnS2 flower-like hierarchical structure owing to a large surface area and abundant active sites, as well as the n-n heterojunction that improves carrier mobility and enhances the gas sensing performance. The adsorption energy, charge transfer, and density of states of In2O3/SnS2 adsorbed NO2 system were analyzed using density functional theory (DFT) to explore the mechanism of gas sensing enhancement. Thus, the In2O3/SnS2 sensor paves the way for future real-time and rapid detection of NO2 gas.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"444 ","pages":"Article 138277"},"PeriodicalIF":8.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0