Sensors and Actuators B: Chemical最新文献

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Programmable FPGA-based TDLAS-WMS hygrometer (PFTWH) for broad-range water vapour detection: Quantitative assessment of digital lock-in amplifier (DLIA) performance via integrated WMS system (I-WMS) 基于可编程fpga的宽范围水汽检测tlas -WMS湿度计(PFTWH):通过集成WMS系统(I-WMS)定量评估数字锁相放大器(DLIA)性能
IF 3.7 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-15 DOI: 10.1016/j.snb.2025.138930
Minyoung Choi , Gyuwon Cho , Seyeon Hwang , Jinwoo Lee , Yangmo Kim , Jeongmin Kim , Kyunghoon Kim , Hongyun So , Sun Choi
{"title":"Programmable FPGA-based TDLAS-WMS hygrometer (PFTWH) for broad-range water vapour detection: Quantitative assessment of digital lock-in amplifier (DLIA) performance via integrated WMS system (I-WMS)","authors":"Minyoung Choi ,&nbsp;Gyuwon Cho ,&nbsp;Seyeon Hwang ,&nbsp;Jinwoo Lee ,&nbsp;Yangmo Kim ,&nbsp;Jeongmin Kim ,&nbsp;Kyunghoon Kim ,&nbsp;Hongyun So ,&nbsp;Sun Choi","doi":"10.1016/j.snb.2025.138930","DOIUrl":"10.1016/j.snb.2025.138930","url":null,"abstract":"<div><div>This study demonstrates the capability of wavelength modulation spectroscopy (WMS) based on tunable diode laser absorption spectroscopy (TDLAS) using a hand-held field-programmable gate array (FPGA) system. Programmable FPGA-based TDLAS-WMS hygrometer (PFTWH) enables measurement of water vapour concentrations over a broad range (70–5800 ppm) for applications in climate science. This system incorporates a custom-designed digital lock-in amplifier (DLIA), optimized for water vapour detection. For the DLIA, a 100 Hz cut-off frequency and a finite impulse response filter with a windowed-Hamming design and a 200-tap coefficient were used. The PFTWH demonstrated simultaneous processing capability of 1 f and 2 f signals by programming the DLIA on a commercial FPGA board. To quantitatively evaluate DLIA performance, we introduced an integrated WMS system that enables parallel operation of a commercial FPGA-based TDLAS-WMS hygrometer (CFTWH), the PFTWH, and direct TDLAS (dTDLAS). The 1 f and 2 f signals are extracted from both the CFTWH and PFTWH, while the dTDLAS provides reference concentration information for performance assessment. The linearity and accuracy of the designed PFTWH were validated by comparison with the CFTWH. Additionally, long-term measurements of water vapour concentrations across the broad range (70–5800 ppm) were successfully performed with a time resolution of 0.1 s, maintaining stable performance over 1000 s with 30 s averaging. Furthermore, both PFTWH and CFTWH were demonstrated to meet uncertainty, accuracy, and precision requirements for airborne measurement.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138930"},"PeriodicalIF":3.7,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145326839","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
Flexible SERS substrate based on active nanoparticle enrichment for ultra-trace in situ detection 基于活性纳米颗粒富集的柔性SERS衬底用于超痕量原位检测
IF 3.7 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-15 DOI: 10.1016/j.snb.2025.138945
Shaoshuai Han , Yangyang Yu , Di Lian , Xin Yang , Ning Li , Tangcheng Huang , Shaojing Duan , Meijing Du , Jun Ren , Zhenlin Wu
{"title":"Flexible SERS substrate based on active nanoparticle enrichment for ultra-trace in situ detection","authors":"Shaoshuai Han ,&nbsp;Yangyang Yu ,&nbsp;Di Lian ,&nbsp;Xin Yang ,&nbsp;Ning Li ,&nbsp;Tangcheng Huang ,&nbsp;Shaojing Duan ,&nbsp;Meijing Du ,&nbsp;Jun Ren ,&nbsp;Zhenlin Wu","doi":"10.1016/j.snb.2025.138945","DOIUrl":"10.1016/j.snb.2025.138945","url":null,"abstract":"<div><div>Surface-enhanced Raman spectroscopy (SERS) has emerged as a powerful technique for applications in food safety testing, environmental monitoring, disease diagnosis, and molecular characterization. However, conventional SERS substrates frequently suffer from limited sensitivity, poor signal uniformity, and dependence on skilled operators. In this study, a flexible and high-performance SERS sensing strategy is proposed, which is based on surface acoustic wave (SAW)-induced clustering of 50 nm gold nanoparticles (AuNPs). When a <span><math><mrow><mn>5</mn><mspace></mspace><mi>μ</mi></mrow></math></span>L AuNP colloidal droplet is dispensed onto the SAW propagation region, acoustic streaming drives the aggregation of nanoparticles. Upon complete evaporation of the droplet, densely packed SERS-active hotspots are formed, enabling strong Raman signal enhancement. By optimizing the thickness of the PDMS flexible film and the input power, the resulting Raman substrate exhibits minimum detectable concentration reaching 10<sup>−13</sup> <!-->M for rhodamine 6G (R6G), 10<sup>−10</sup> <!-->M for 4-aminothiophenol (4-ATP), and 10<sup>−11</sup> <!-->M for crystal violet (CV)—as well as excellent reproducibility. The relative standard deviation (RSD) for CV detection decreased from 45.32% (SAW-free) to 3.59% under SAW-assisted enrichment, confirming the significant improvement in signal uniformity. Finally, the flexible SAW-SERS sensor demonstrates a sensitivity of up to 10<sup>−8</sup> <!-->M for detecting Thiram residues on apple surfaces. This flexible SAW-assisted SERS substrate offers a promising strategy for portable, efficient, and reliable environmental and food safety monitoring.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138945"},"PeriodicalIF":3.7,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145288774","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
Nanozyme-driven fenton-RAFT polymerization for highly sensitive PEC–CL dual-mode biosensing of caspase-3 纳米酶驱动Fenton-RAFT聚合对Caspase-3高灵敏度的PEC-CL双模生物传感
IF 3.7 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-14 DOI: 10.1016/j.snb.2025.138989
Huan Wang, Wenyue Zhang, Cuicui Du, Xiaohua Zhang, Jinhua Chen
{"title":"Nanozyme-driven fenton-RAFT polymerization for highly sensitive PEC–CL dual-mode biosensing of caspase-3","authors":"Huan Wang,&nbsp;Wenyue Zhang,&nbsp;Cuicui Du,&nbsp;Xiaohua Zhang,&nbsp;Jinhua Chen","doi":"10.1016/j.snb.2025.138989","DOIUrl":"10.1016/j.snb.2025.138989","url":null,"abstract":"<div><div>Reversible addition–fragmentation chain-transfer (RAFT) polymerization offers an effective strategy for signal amplification in sensitive biosensing. Herein, we developed a novel photoelectrochemical–colorimetric (PEC–CL) dual-mode biosensing platform for the highly sensitive detection of caspase-3 activity, based on the RAFT polymerization initiated by nanozyme-driven Fenton reaction. Specifically, a magnetic CuFe<sub>2</sub>O<sub>4</sub> nanozyme was modified with chain transfer agents (CPAD) to form CPAD-CuFe<sub>2</sub>O<sub>4</sub>, which was immobilized on the sensing interface via a caspase-3-cleavable DEVD peptide linkage. Upon the introduction of caspase-3, the functionalized CuFe<sub>2</sub>O<sub>4</sub> nanozyme was released and catalyzed the Fenton reaction to generate hydroxyl radicals (•OH), thereby initiating RAFT polymerization of Hemin-fixed vinyl monomers (Hemin-VM). The resulting poly(Hemin-VM) (pHemin-VM) was in situ grafted onto the surface of nanozyme, forming a pHemin-VM/CuFe<sub>2</sub>O<sub>4</sub> composite that enhanced •OH generation through a positive feedback mechanism, consequently further amplifying the sensing signals. Finally, caspase-3 was sensitively detected through PEC responses arising from polarity switching at the SnS<sub>2</sub>/MITO electrode and CL signals generated by the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB). The proposed PEC–CL dual-mode sensing platform exhibited a wide linear range (PEC: 10<sup>−16</sup>–10<sup>−8</sup> g mL<sup>−1</sup>, CL: 10<sup>−15</sup>–10<sup>−8</sup> g mL<sup>−1</sup>) and low detection limit (5.0 × 10<sup>−17</sup> g mL<sup>−1</sup> for PEC, and 2.7 × 10<sup>−16</sup> g mL<sup>−1</sup> for CL) for caspase-3 activity assay. This study introduced a nanozyme-driven Fenton chemistry-initiated RAFT polymerization signal amplification strategy, and expanded its application in biosensing, offering a robust platform for dual-mode detection of disease biomarkers and advancing next-generation biosensor development.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138989"},"PeriodicalIF":3.7,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283587","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
Targeted conversion from mitochondria to lipid droplets of nitrostyrylindolium by inserting only a styryl group 通过仅插入一个苯乙烯基团,将线粒体定向转化为亚硝基苯乙烯酰胺的脂滴
IF 3.7 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-14 DOI: 10.1016/j.snb.2025.138984
Zuo-Hu Chai , Fujian Qi , De-Chen Duan , Yu Zhang , Neng Wang , Jian-Jian Kang , Fang Dai , Shengxiang Zhang , Bo Zhou
{"title":"Targeted conversion from mitochondria to lipid droplets of nitrostyrylindolium by inserting only a styryl group","authors":"Zuo-Hu Chai ,&nbsp;Fujian Qi ,&nbsp;De-Chen Duan ,&nbsp;Yu Zhang ,&nbsp;Neng Wang ,&nbsp;Jian-Jian Kang ,&nbsp;Fang Dai ,&nbsp;Shengxiang Zhang ,&nbsp;Bo Zhou","doi":"10.1016/j.snb.2025.138984","DOIUrl":"10.1016/j.snb.2025.138984","url":null,"abstract":"<div><div>As highly dynamic cellular organelles responsible for the storage of neutral lipids, lipid droplets (LDs) assume crucial roles in maintaining lipid and energy metabolism. Hence, developing fluorescent probes for imaging the dynamics of LDs (generation, fusion, growth, and degradation) can offer valuable insights into numerous pathophysiological processes. This study highlights a targeted conversion strategy for promptly fabricating a novel LD fluorescent probe named <strong>NSSI</strong> by simply inserting a styryl group into nitrostyrylindolium (IR-418), a well-known mitochondria-targeted probe. The insertion of a styryl group enables an increase in the lipophilicity of <strong>NSSI</strong> (Clog<em>P</em> = 6.37) compared with the parent IR-418 (Clog<em>P</em> = 4.10), thereby facilitating its embedding into the waterless core of LDs <em>via</em> hydrophobic interaction, along with an interface-targeting through the electrostatic interaction between its indolium moiety and the negatively charged polar shell of LDs, to achieve its specific targeting towards LDs. By utilizing <strong>NSSI</strong>, we have successfully monitored the morphology and dynamic alterations of LDs in diverse cellular models. We have also observed the LD distribution differences between the infarcted and normal regions in the brain tissues of a photothrombosis stroke mouse model, visualized disrupted hepatic cords and severe steatosis within the liver tissues of an acute liver failure (ALF) mouse model, and witnessed the lipid-rich areas in zebrafish embryos. Overall, these findings signify the potential of <strong>NSSI</strong> as a highly versatile tool for dynamic LD imaging, whether in cellular models, tissue samples, or <em>in vivo</em> scenarios.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138984"},"PeriodicalIF":3.7,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145288923","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
Highly responsive detection of triethylamine gas based on Gd-doped MoO3 nanorod sensors: an experimental and first-principles study 基于钆掺杂MoO3纳米棒传感器的高响应检测三乙胺气体:实验和第一性原理研究
IF 8.4 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-14 DOI: 10.1016/j.snb.2025.138938
Yonghui Jia
{"title":"Highly responsive detection of triethylamine gas based on Gd-doped MoO3 nanorod sensors: an experimental and first-principles study","authors":"Yonghui Jia","doi":"10.1016/j.snb.2025.138938","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138938","url":null,"abstract":"Triethylamine (TEA) is widely used in industrial production, but it poses a threat to human health. Therefore, it is crucial to develop highly sensitive sensors for TEA. In this paper, Gd-doped MoO<sub>3</sub> nanorod structures with different molar ratios were prepared via a step hydrothermal route by taking advantage of the excellent properties of rare earth elements. After comprehensively characterize, it was confirmed that Gd was successfully doped into the MoO<sub>3</sub> lattice. The sensor based on 3<!-- --> <!-- -->mol% Gd-doped MoO<sub>3</sub> exhibited a larger specific surface area and a higher amount of surface-adsorbed oxygen compared to sensors with other doping ratios. The sensor with this optimal doping ratio has a gas sensing response of about 65.8 for 10 ppm TEA at 150 ℃, which is six times higher than that of the pure MoO<sub>3</sub> nanorods, with a response time of only 16<!-- --> <!-- -->s. In addition, the sensor exhibits excellent selectivity, good reproducibility, and excellent long-term stability. Finally, density-functional theory (DFT) calculations indicate that the gadolinium-doped MoO<sub>3</sub> material significantly improved the sensing performance for TEA. This study provides a valuable reference for the development of metal-semiconductor (MOS) sensors for the detection of TEA.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"102 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145288919","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
Visual fluorescence discovery of the potent photoswitchable hTYR inhibitor to improve treatment strategy for hyperpigmentation 视觉荧光发现强效光切换hTYR抑制剂以改善色素沉着过度的治疗策略
IF 3.7 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-14 DOI: 10.1016/j.snb.2025.138988
Dingqiang Fu , Xilei Ai , Xiaoyan Li , Yu Huang , Bo Liu
{"title":"Visual fluorescence discovery of the potent photoswitchable hTYR inhibitor to improve treatment strategy for hyperpigmentation","authors":"Dingqiang Fu ,&nbsp;Xilei Ai ,&nbsp;Xiaoyan Li ,&nbsp;Yu Huang ,&nbsp;Bo Liu","doi":"10.1016/j.snb.2025.138988","DOIUrl":"10.1016/j.snb.2025.138988","url":null,"abstract":"<div><div>Hyperpigmentation, which is caused by excess melanin production by melanocytes with human tyrosinase (hTYR) playing a pivotal role, can lead to various dermatological disorders. Therefore, the discovery and utilization of novel human tyrosinase inhibitors represent a promising therapeutic strategy. Herein, a new fluorescent probe <strong>THT-1</strong> was developed for the first time to recognize human tyrosinase instead of mushroom tyrosinase based on the thalidomide fluorescent skeleton. This green probe can not only screen for novel photoswitchable indole-2-ketone-based human tyrosinase inhibitors with better visual sensitivity, but also effectively recognize endogenous tyrosinase at both cellular and zebrafish levels. By meticulously monitoring fluorescence intensity variations, the impact of photoswitchable inhibitors on tyrosinase activity has been tracked, both <em>in vitro</em> and <em>in vivo</em>. These results demonstrate that a multifunctional thalidomide-based probe has been successfully obtained, which facilitates the identification of potent photoswitchable human tyrosinase inhibitors. Moreover, a potent photoswitchable tyrosinase inhibitor <strong>T-1</strong> for reducing melanin levels in A375 cells and zebrafish has been also successfully developed, thus potentially advancing new treatment approaches for hyperpigmentation.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138988"},"PeriodicalIF":3.7,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283586","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
Taguchi optimization of CPTES chemistry for photonic crystal-based biosensors: Detection of anti-SARS-CoV-2 antibodies in human serum 光子晶体生物传感器CPTES化学的田口优化:检测人血清中抗sars - cov -2抗体
IF 3.7 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-14 DOI: 10.1016/j.snb.2025.138979
Agostino Occhicone , Paola Di Matteo , Maryam Heidari , Daniele Chiappetta , Norbert Danz , Peter Munzert , Matteo Allegretti , Chiara Mandoj , Alberto Sinibaldi , Francesco Michelotti
{"title":"Taguchi optimization of CPTES chemistry for photonic crystal-based biosensors: Detection of anti-SARS-CoV-2 antibodies in human serum","authors":"Agostino Occhicone ,&nbsp;Paola Di Matteo ,&nbsp;Maryam Heidari ,&nbsp;Daniele Chiappetta ,&nbsp;Norbert Danz ,&nbsp;Peter Munzert ,&nbsp;Matteo Allegretti ,&nbsp;Chiara Mandoj ,&nbsp;Alberto Sinibaldi ,&nbsp;Francesco Michelotti","doi":"10.1016/j.snb.2025.138979","DOIUrl":"10.1016/j.snb.2025.138979","url":null,"abstract":"<div><div>Surface functionalization is a pivotal step in the development of biosensors, as it directly influences the immobilization efficiency of biological recognition elements and, consequently, the overall performance of the biosensing platforms. In this study, we employed the Taguchi method to systematically optimize the functionalization parameters of a silicon oxide surface using an organosilane compound. The biosensing platform is based on a one-dimensional photonic crystal structure capable of sustaining Bloch surface waves, which enable highly sensitive optical detection. The use of the Taguchi orthogonal array design allowed us to efficiently explore a limited and representative set of parameter combinations, significantly reducing experimental complexity. Once the optimal functionalization conditions were identified, the biosensors were applied to the analysis of human serum samples (diluted 1:50) collected from both COVID-19 patients and healthy individuals. The system demonstrated the ability to specifically detect IgM antibodies related to SARS-CoV-2 virus, which are typically present in trace amounts. This work presents the first Taguchi-based optimization of a surface functionalization strategy via label-free molecular interactions for biosensing. The approach provides a platform for both optimization and sensitive detection of clinically relevant biomarkers, with clear diagnostic potential.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138979"},"PeriodicalIF":3.7,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283585","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
Highly selective room temperature NO2 detection via π-back bonding in CuTPP-functionalized conductive polymer sensors 基于cuppp功能化导电聚合物传感器π-背键的高选择性室温NO2检测
IF 3.7 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-14 DOI: 10.1016/j.snb.2025.138991
Jiyuan Xue , Bingcheng Shen , Juan Wang , Juan Li , Hongran Zhao , Tong Zhang
{"title":"Highly selective room temperature NO2 detection via π-back bonding in CuTPP-functionalized conductive polymer sensors","authors":"Jiyuan Xue ,&nbsp;Bingcheng Shen ,&nbsp;Juan Wang ,&nbsp;Juan Li ,&nbsp;Hongran Zhao ,&nbsp;Tong Zhang","doi":"10.1016/j.snb.2025.138991","DOIUrl":"10.1016/j.snb.2025.138991","url":null,"abstract":"<div><div>Nitrogen dioxide (NO<sub>2</sub>), primarily emitted from transportation and industrial activities, poses significant threats to human health and environmental safety. However, reliable, repeatable, highly selective, and sensitive detection of NO<sub>2</sub> at room temperature remains challenging. In biological systems, metalloporphyrins are well known for their essential roles in gas transport, storage, and as catalytic centers in enzymatic redox reactions, demonstrating highly refined molecular recognition capabilities. Inspired by these unique gas-metal porphyrin interactions, we incorporated copper tetraphenylporphyrin (CuTPP) into a conductive polymer composite consisting of polyaniline (PANI) and Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) to construct a high-performance NO<sub>2</sub> sensor operating at room temperature. Upon exposure to NO<sub>2</sub>, Cu<sup>2</sup>⁺ ions in CuTPP selectively adsorb NO<sub>2</sub> via a non-classical π-back bonding mechanism, which not only ensures high selectivity but also significantly facilitates charge transfer pathways centered around CuTPP, greatly enhancing electron extraction from PANI. For sensor recovery, ultraviolet (UV) was employed to promote the desorption of NO<sub>2</sub>. The developed sensor exhibits excellent linearity (R<sup>2</sup> &gt; 0.97) within an NO<sub>2</sub> concentration range of 0.2–1 ppm, and achieves a theoretical detection limit of approximately 0.4 ppb, suitable for monitoring concentrations of NO<sub>2</sub> in environmental settings. By exploiting the non-classical π-back bonding interaction between CuTPP and NO<sub>2</sub> within a conductive polymer matrix, our approach provides a versatile and low-power strategy for precise NO<sub>2</sub> detection, with potential applications in environmental monitoring and assessment.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138991"},"PeriodicalIF":3.7,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283584","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
Organometallic-derived metal oxide sensors for H₂S detection in an electronic nose for odor abatement assessment 用于电子鼻中h2s检测的有机金属衍生金属氧化物传感器,用于气味消减评估
IF 3.7 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-14 DOI: 10.1016/j.snb.2025.138990
Justyna Jońca , Urszula Miller , Jarosław Szrek , Artur Muraszkowski , Adalbert Arsen , Izabela Sówka , Katia Fajerwerg , Myrtil L. Kahn , Philippe Menini , Pierre Fau
{"title":"Organometallic-derived metal oxide sensors for H₂S detection in an electronic nose for odor abatement assessment","authors":"Justyna Jońca ,&nbsp;Urszula Miller ,&nbsp;Jarosław Szrek ,&nbsp;Artur Muraszkowski ,&nbsp;Adalbert Arsen ,&nbsp;Izabela Sówka ,&nbsp;Katia Fajerwerg ,&nbsp;Myrtil L. Kahn ,&nbsp;Philippe Menini ,&nbsp;Pierre Fau","doi":"10.1016/j.snb.2025.138990","DOIUrl":"10.1016/j.snb.2025.138990","url":null,"abstract":"<div><div>We present the development and application of novel metal oxide gas sensors derived from organometallic and ion-exchange synthesis routes, integrated into an electronic nose platform for the detection of hydrogen sulfide (H₂S) and odorous compounds. The CuO, SnO₂, and WO₃ nanoparticles were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). These nanomaterials were deposited as single and double-layer structures forming engineered p–n and n–n heterojunctions. The sensors were evaluated in a wide H₂S concentration range (5 ppb to 50 ppm) under controlled humidity and temperature conditions. Double-layer configurations exhibited significantly enhanced sensitivity, selectivity, and stability compared to commercial MOS sensors. Selected sensors were integrated into a custom-built gas sensing array and used to construct an e-nose system. The system was trained using dynamic olfactometry and applied for odor quantification in real samples from a Municipal Solid Waste Treatment Plant (MSWTP). The e-nose achieved high accuracy in estimating odor concentrations and deodorization efficiency in two full-scale biofilters, outperforming commercial sensor systems. This study presents a complete sensor-to-application workflow, combining nanomaterial design, sensor engineering, statistical modelling, and real-world environmental monitoring. It highlights the potential of organometallic-derived MOS sensors as key components in advanced gas sensing platforms for reliable odor detection in complex industrial environments.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138990"},"PeriodicalIF":3.7,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145288920","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
Revealing a close link between ferroptosis and drug-induced liver injury with dual-site NIR ratiometric fluorescent probe for mitochondrial peroxynitrite 线粒体过氧亚硝酸盐双位点近红外比例荧光探针揭示铁下垂与药物性肝损伤之间的密切联系
IF 3.7 1区 化学
Sensors and Actuators B: Chemical Pub Date : 2025-10-13 DOI: 10.1016/j.snb.2025.138985
Zhengliang Lu , Xionghao Xu , Bo Zhao , Tao Jiang , Tianxin Liu , Won Jun Jang , Juyoung Yoon , Mei Yan , Chunhua Fan
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