Sensors and Actuators B: Chemical最新文献

英文中文

Photoisomerization-engineered fluorescent probe for innovative detection and bioimaging of salicylic acid during salt stress in plants 植物盐胁迫下水杨酸的光异构化工程荧光探针创新检测和生物成像

IF 8.4 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-31 DOI: 10.1016/j.snb.2026.139579

A-Ling Tang, Shuai Tan, Ya-Ping Wu, Tian-Li Lu, Wei Niu, Fang-Fang Kong, Xiang Zhou, Song Yang

引用次数: 0

A Stable Dumbbell-Shaped DNA Nanostructure Enabling Primer-Free Amplification for Sensitive and Specific Single-Nucleotide Variant Detection 一个稳定的哑铃形DNA纳米结构，使无引物扩增敏感和特异性单核苷酸变异检测

IF 8.4 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-31 DOI: 10.1016/j.snb.2026.139586

Lin Hua, Xiaoling Wei, Jianxin Wu, Xiao Fang, Guoqiang Chen, Mengqi Zhan, Jinshen Chu, Can Wang, Qingxin Jiang, Huo Xu, Guohui Xue

引用次数: 0

Fe3O4@PDA-Ag Enabled Electrochemical/Photothermal Dual-Functional Immunoassay with Signal Cross-Validation for Accurate Detection of Alpha-Fetoprotein Fe3O4@PDA-Ag启用电化学/光热双功能免疫分析与信号交叉验证，以准确检测甲胎蛋白

IF 8.4 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-31 DOI: 10.1016/j.snb.2026.139549

Hongyu Xue, Shuyu Shi, Mingzhe Jiang, Tiantian Ji, Yige Li, Haoyi Ren, Yu Qi, Chenglin Hong

引用次数: 0

Multiplexed immuno-acoustic separation of exosome and lipoprotein from platelet using acoustic radiation force 利用声辐射力对血小板外泌体和脂蛋白进行多路免疫声分离

IF 8.4 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-31 DOI: 10.1016/j.snb.2026.139580

Jeongeun Park, Song Ha Lee, Beomseok Cha, Woohyuk Kim, Jinsoo Park

引用次数: 0

Rapid identification of sulfur defect levels in MoS₂ and MoSe₂ nanomaterials and their reaction with thiol molecules through defect-induced dimerization of 5-thio-2-nitrobenzoic acid 通过缺陷诱导5-硫代-2-硝基苯甲酸二聚体快速鉴定MoS 2和MoSe 2纳米材料中的硫缺陷水平及其与硫醇分子的反应

IF 3.7 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-30 DOI: 10.1016/j.snb.2026.139577

S. Santhoshkumar , Yu-Chan Wu , Liu Bo-Yu , Wei-Lung Tseng

Several spectroscopic and electron microscopic techniques can monitor sulfur defects in molybdenum disulfide (MoS₂)-based nanomaterials, but they often require costly instrumentation. Herein, we introduce a straightforward, fast, colorimetric method to evaluate sulfur vacancy degree in MoS₂ nanoflowers (NFs), MoS₂ nanosheets (NSs), and molybdenum diselenide (MoSe₂) NSs by monitoring the dimerization of 5-thio-2-nitrobenzoic acid (TNB) into 5,5’-dithiobis(2-nitrobenzoic acid) (DTNB). This sulfur-vacancy-mediated reaction results in a decrease in TNB absorbance at 412 nm and the emergence of a new DTNB peak near 325 nm. The dimerization of TNB triggered by MoS₂ NFs, MoS₂ NSs, and MoSe₂ NSs follows pseudo-first-order kinetics. The rate constants of these materials correlate positively with sulfur defect density, but their maximum absorption capability remains similar. Additionally, machine learning simulations (Open Catalyst Project, GemNet-T) show that the adsorption energy of CH₃SH (a model thiol) becomes more negative with increasing sulfur vacancies on the MoS₂ surface. The MoS₂-mediated TNB dimerization system provides a simple platform to distinguish whether a thiol compound undergoes dimerization or attaches to sulfur defect sites in the presence of sulfur-defective MoS₂. For example, cysteine, glutathione, and homocysteine undergo dimerization, whereas 3-sulfanylpropanoic acid, 4-aminothiophenol, and 2-sulfanylbenzoic acid primarily attach to the sulfur defect sites.

几种光谱和电子显微镜技术可以监测二硫化钼（MoS2）基纳米材料中的硫缺陷，但它们通常需要昂贵的仪器。本文介绍了一种简单、快速、比色的方法，通过监测5-硫代-2-硝基苯甲酸（TNB）在5,5′-二硫代obis（2-硝基苯甲酸）（DTNB）中的二聚化反应，来评估MoS2纳米花（NFs）、MoS2纳米片（NSs）和二硒化钼（MoSe2） NSs中的硫空位度。这种硫空位介导的反应导致在412 nm处的TNB吸光度下降，并在325 nm附近出现新的DTNB峰。由MoS2 NFs、MoS2 NSs和MoSe2 NSs引发的TNB二聚化遵循准一级动力学。这些材料的速率常数与硫缺陷密度呈正相关，但它们的最大吸收能力保持相似。此外，机器学习模拟（Open Catalyst Project, GemNet-T）表明，CH₃SH（一种模型硫醇）的吸附能随着MoS₂表面硫空位的增加而变得更加负。MoS2介导的TNB二聚化系统提供了一个简单的平台来区分硫醇化合物在硫缺陷的MoS2存在下是经历二聚化还是附着在硫缺陷位点上。例如，半胱氨酸、谷胱甘肽和同型半胱氨酸发生二聚化，而3-磺胺基丙酸、4-氨基噻吩和2-磺胺基苯甲酸主要附着在硫缺陷位点上。

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引用次数: 0

Electrochemical aptasensor for trimethoprim detection based on Pd@Ir bimetallic nanoparticles coupled with hybrid chain reaction 基于Pd@Ir双金属纳米颗粒耦合杂化链式反应的甲氧苄氨嘧啶电化学感应传感器

IF 3.7 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-30 DOI: 10.1016/j.snb.2026.139575

Man Ding , Hong Xu , Mengxia Duan , Meihua Dong , Kuaile Wu , Shijia Wu , Changqing Zhu , Nuo Duan

Trimethoprim (TMP), a widely used veterinary antibacterial, accumulates in animal-derived foods and poses health risks like bacterial resistance and bone marrow hematopoietic suppression. Herein, an ultrasensitive electrochemical aptasensor was developed by integrating molecular docking-optimized TMP-specific aptamers, Pd@Ir bimetallic nanoparticles (Pd@Ir NPs) for signal enhancement, and hybrid chain reaction (HCR) for signal amplification. First, a high-affinity TMP-specific aptamer TMP-1 was screened via Capture-SELEX. Through molecular docking to identify core binding sites and truncate redundant sequences, TMP-1 was optimized into the 56 nt TMP-1C with enhanced affinity (The Kd was determined to be 41.6 nM by SGI assays). Pd@Ir NPs with excellent conductivity and electrocatalytic activity were coupled to hairpin H2 to form Pd@Ir NPs@H2 probes. For sensor construction, thiol-modified cDNA-TMP-1C duplexes were immobilized on gold electrodes, the binding between TMP and aptamer induced the duplex de-hybridization, and the exposed cDNA opened H1 and triggered HCR, thereby achieving Pd@Ir NPs enrichment and signal amplification. This method exhibits an ultra-low limit of detection (LOD) of 0.02 ng/mL. The spiked recovery experiments on pork samples show that the recovery rate of TMP ranges from 92.00 % to 93.99 % with a relative standard deviation (RSD) of 3.34 %–3.89 %, confirming its accuracy in practical samples. This sensor provides an efficient, high-performance tool for TMP residue detection in food safety monitoring.

甲氧苄啶（TMP）是一种广泛使用的兽用抗菌药物，在动物源性食品中积累，并造成细菌耐药性和骨髓造血抑制等健康风险。本文通过整合分子对接优化的tmp特异性适配体、Pd@Ir双金属纳米粒子（Pd@Ir NPs）用于信号增强和杂化链反应（HCR）用于信号放大，开发了一种超灵敏的电化学适配体传感器。首先，通过Capture-SELEX筛选高亲和力的tmp特异性适配体TMP-1。通过分子对接鉴定核心结合位点，截断冗余序列，将TMP-1优化为56 nt的具有增强亲和力的TMP-1C（经SGI测定Kd为41.6 nM）。将具有优异导电性和电催化活性的Pd@Ir NPs与发夹H2偶联形成Pd@Ir NPs@H2探针。在传感器构建中，将巯基修饰的cDNA-TMP- 1c双链固定在金电极上，TMP与适体结合诱导双链去杂交，暴露的cDNA打开H1并触发HCR，从而实现Pd@Ir NPs富集和信号扩增。该方法的超低检出限为0.02 ng/mL。在猪肉样品中加标回收率为92.00 % ~ 93.99 %，相对标准偏差（RSD）为3.34 % ~ 3.89 %，验证了该方法在实际样品中的准确性。该传感器为食品安全监测中TMP残留检测提供了一种高效、高性能的工具。

{"title":"Electrochemical aptasensor for trimethoprim detection based on Pd@Ir bimetallic nanoparticles coupled with hybrid chain reaction","authors":"Man Ding , Hong Xu , Mengxia Duan , Meihua Dong , Kuaile Wu , Shijia Wu , Changqing Zhu , Nuo Duan","doi":"10.1016/j.snb.2026.139575","DOIUrl":"10.1016/j.snb.2026.139575","url":null,"abstract":"<div><div>Trimethoprim (TMP), a widely used veterinary antibacterial, accumulates in animal-derived foods and poses health risks like bacterial resistance and bone marrow hematopoietic suppression. Herein, an ultrasensitive electrochemical aptasensor was developed by integrating molecular docking-optimized TMP-specific aptamers, Pd@Ir bimetallic nanoparticles (Pd@Ir NPs) for signal enhancement, and hybrid chain reaction (HCR) for signal amplification. First, a high-affinity TMP-specific aptamer TMP-1 was screened via Capture-SELEX. Through molecular docking to identify core binding sites and truncate redundant sequences, TMP-1 was optimized into the 56 nt TMP-1C with enhanced affinity (The Kd was determined to be 41.6 nM by SGI assays). Pd@Ir NPs with excellent conductivity and electrocatalytic activity were coupled to hairpin H2 to form Pd@Ir NPs@H2 probes. For sensor construction, thiol-modified cDNA-TMP-1C duplexes were immobilized on gold electrodes, the binding between TMP and aptamer induced the duplex de-hybridization, and the exposed cDNA opened H1 and triggered HCR, thereby achieving Pd@Ir NPs enrichment and signal amplification. This method exhibits an ultra-low limit of detection (LOD) of 0.02 ng/mL. The spiked recovery experiments on pork samples show that the recovery rate of TMP ranges from 92.00 % to 93.99 % with a relative standard deviation (RSD) of 3.34 %–3.89 %, confirming its accuracy in practical samples. This sensor provides an efficient, high-performance tool for TMP residue detection in food safety monitoring.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"454 ","pages":"Article 139575"},"PeriodicalIF":3.7,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089618","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

Harmonic model-based feature representation for temperature-modulated electronic noses 基于谐波模型的温度调制电子鼻特征表示

IF 8.4 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-30 DOI: 10.1016/j.snb.2026.139566

Lihua Guo, Zhongxin Bai, Mou Wang, Zhengqiao Zhao, Jingdong Chen, Jacob Benesty

引用次数: 0

Compact nested multi-structure resonator photoacoustic cell for multi-component gas detection 用于多组分气体检测的紧凑嵌套多结构谐振腔光声电池

IF 3.7 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-30 DOI: 10.1016/j.snb.2026.139568

Dong Li , Qinduan Zhang , Jiqiang Wang , Tingting Zhang , Guo Sun , Minghe Wu , Hongzhen Yu , Wei Wang , Yefeng Gu , Chunsheng Li

This paper presents a compact nested multi-structure resonator photoacoustic cell (NMSR-PAC) for multi-component gas detection. By designing multiple resonator structures, distinct resonant frequencies are obtained at an identical resonator length, while the photoacoustic (PA) signal in each resonator is simultaneously maximized. The NMSR-PAC employs a semi-ellipsoidal buffer chamber and incorporates cylindrical, semi-ellipsoidal, and exponential resonators. Nesting these resonators into the buffer chamber enables the generation of higher PA signals within a limited structural length, while ensuring fast system response and PAC compactness. The response characteristics of the NMSR-PAC were analyzed using laminar flow and dilute species transport modules in COMSOL. Compared with a non-nested PAC (NN-PAC), the NMSR-PAC exhibits a significantly shorter response time, which can be further reduced by optimizing the gas inlet and outlet positions. The sensing performance and stability of the NMSR-PAC were experimentally validated, demonstrating excellent linearity over a wide concentration range and no observable crosstalk among the resonators. Using an NMSR-PAC-based photoacoustic spectroscopy (PAS) sensor, the minimum detection limits (MDLs) for CO₂, CH₄, and C₂H₂ were determined to be 19.82 ppm, 0.21 ppm, and 0.11 ppm, respectively.

提出了一种用于多组分气体检测的紧凑型嵌套多结构谐振腔光声电池。通过设计多个谐振腔结构，在相同的谐振腔长度下获得不同的谐振频率，同时使每个谐振腔中的光声信号同时最大化。NMSR-PAC采用半椭球缓冲腔，并结合圆柱形、半椭球和指数谐振器。将这些谐振器嵌套到缓冲腔中，可以在有限的结构长度内产生更高的PA信号，同时确保快速的系统响应和PAC紧凑性。利用COMSOL中的层流和稀种输运模块分析了NMSR-PAC的响应特性。与非嵌套式PAC （NN-PAC）相比，NMSR-PAC的响应时间明显缩短，通过优化进风口和出风口位置可以进一步缩短响应时间。实验验证了NMSR-PAC的传感性能和稳定性，在较宽的浓度范围内表现出良好的线性，并且谐振腔之间没有可见的串扰。利用基于nmsr - pac的光声光谱（PAS）传感器，测定了CO2、CH4和C2H2的最低检出限（MDLs）分别为19.82 ppm、0.21 ppm和0.11 ppm。

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引用次数: 0

Zn doped In2O3 microtubes derived from zinc nitrate solution etched MIL-68-In for enhancing NO2 sensing property at room temperature 由硝酸锌溶液蚀刻MIL-68-In制成的锌掺杂In2O3微管提高了室温下NO2的传感性能

IF 3.7 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-30 DOI: 10.1016/j.snb.2026.139561

Yan Jiang , Yuying Xin , Hui Zhao , Xianfa Zhang , Ping Wang , Rui Gao , Yingming Xu , Shan Gao , Xiaoli Cheng , Lihua Huo

The reasonable design and preparation of high-performance sensing materials for detecting NO₂ is of importance to environmental conservation and public health. Herein, porous Zn-doped In₂O₃ microtubes were fabricated by simple Zn(NO₃)₂ solution etching of In-MOF microrods, followed by calcination at 500 ℃ in air. The experiment has confirmed that appropriate amount of Zn introduced into In₂O₃ can optimize electronic structure, increase the number of oxygen vacancy and efficiently improve NO₂ sensing property. In particular, compared with pristine In₂O₃, Zn-In₂O₃ sensor exhibits excellent selectivity, high response, fast recovery speed (32 s) and lower limit of detection (LOD, 20 ppb) at room temperature. Meanwhile, the Zn-In₂O₃ sensor also presents outstanding reproducibility, stability and humidity resistance. The excellent gas sensing property is traced to the construction of the hollow and porous structure and the synergistic optimization of Zn doping. This endeavor yields a simple strategy for the design of high-property gas sensing materials.

合理设计和制备高性能NO2检测传感材料对环境保护和公众健康具有重要意义。本文采用简单的Zn(NO3)2溶液蚀刻in - mof微棒，然后在500℃空气中煅烧的方法制备了多孔掺锌In2O3微管。实验证实，在In2O3中加入适量的Zn，可以优化In2O3的电子结构，增加氧空位的数量，有效改善NO2的传感性能。特别是，与原始In2O3相比，Zn-In2O3传感器在室温下表现出优异的选择性、高响应、快速的恢复速度（32 s）和低检测限（LOD, 20 ppb）。同时，Zn-In2O3传感器还具有出色的再现性、稳定性和耐湿性。优异的气敏性能源于中空多孔结构的构建和锌掺杂的协同优化。这一努力为设计高性能气敏材料提供了一个简单的策略。

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引用次数: 0

A Stretchable Self-Healing Hydrogel Sensor for Wide-Range Monitoring of Biological Oxygen Cycling with Humidity Resistance 一种可伸缩自修复水凝胶传感器，用于大范围监测具有湿度阻力的生物氧循环

IF 8.4 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical

Pub Date : 2026-01-30 DOI: 10.1016/j.snb.2026.139565

Zhipeng Li, Xin Shi, Liupeng Zhao, Tianshuang Wang, Fangmeng Liu, Xu Yan, Peng Sun, Geyu Lu

引用次数: 0

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Sensors and Actuators B: Chemical

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