COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Jianrong Guo,Juan Wu,Junhui He,Yan Xue
As cadmium ions (Cd 2+ ) pose a serious threat to environment and human health, it is significant to develop portable, fast-response and sensitive Cd 2+ sensors for both real-time and on-site collection of such critical information. In this study, nearly monodisperse ZnS nanoparticles (NPs) were prepared and used to recognize, enrich and detect Cd 2+ ions. ZnS NPs demonstrated fast adsorption kinetics towards Cd 2+ ions (removing 99.3 % of Cd 2+ in 12 min), surpassing previously reported multiple Cd 2+ adsorption materials. Upon adsorbing Cu 2+ and Cd 2+ ions via substitution reaction, ZnS NPs gain strong peroxidase activity, and demonstrate the ability to selectively detect Cu 2+ and Cd 2+ ions among common metal ions . By further conjugating with our previous HSnS NFs (Hollow SnS nanoflower) nanosensor to eliminate the interference of Cu 2+ , the ZnS NPs nanosensor could selectively detect Cd 2+ ions with recoveries above 80 %. The ZnS NPs nanosensor can cover a wide range of Cd 2+ concentration from 0.5 to 100 μg L −1 with an extremely low detection limit of 0.38 μg L −1 . When coupling to a portable RGB sensor, as low as 0.5 μg L −1 Cd 2+ ions could be reached on-site for river water, giving an outstanding recovery of 99.4 %. The current results provide a new avenue to the on-site detection of Cd 2+ ions, and would doubtlessly contribute to the future construction of portable and intelligent sensor arrays towards complex environmental samples.
研究领域:
环境科学
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分析化学
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纳米技术
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传感器技术
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Ting Zhao,Xiaochen Liang,Xinjie Guo,Xingjie Yang,Jialiang Guo,Xia Zhou,Xueqin Huang,Wenqian Zhang,Yiqing Wang,Zhaowei Liu,Zhengjin Jiang,Hongke Zhou,Haibo Zhou
A simple, sensitive method for pesticide distinguishment based on a colorimetric sensor array using diverse gold nanoparticles (AuNPs) at room temperature is presented in this study. Acetylcholinesterase (AChE) hydrolysis ability was influenced by different pesticides and produced different concentrations of thiocholine by hydrolyzing acetylthiocholine iodide (ATCh). Thiocholine could be easily linked to the AuNPs through an Au − S covalent bond, and AuNPs underwent aggregation, resulting in a visible color change due to alteration of surface plasmon resonance properties. Based on these results, we successfully distinguished eight pesticides (glyphosate, thiram, imidacloprid, tribenuron methyl, nicosulfuron, thifensulfuron methyl, dichlorprop, and fenoprop) utilizing five different AuNPs by colorimetric assay. The limit of detection (LOD) of this visual method for all pesticides was less than 1.5 × 10 -7 M, which was more sensitive than the U.S. Environmental Protection Agency regulations specify (1.18 ∼ 3.91 × 10 -6 M). This method was further improved by combining a portable smartphone device with a color picking application using (color name AR) and RGB (red, green, blue) values. The method was successfully applied to pesticide residue distinguishment in real samples by linear discriminant analysis (LDA).
研究领域:
分析化学
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环境科学
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纳米技术
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食品安全
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jing Gu,Lu Zhang,Yangrui Si,Shuang Li,Jianzu Shen,Ruohan Xu,Tingxuan Yan,Mingfu Ye,Daojin Li,Qiang Wang,Changfang Zhang,Shuangshou Wang
Herein, an on-screen direct-reading solution was initiated for real-time monitoring of adsorption, degradation and recycle of dyes in water by integrating colorimetry with WeChat applet, in which MCM-41 composites were served as an all-rounder. Thanks to electrostatic interaction and mesoporous structures, MCM-41 showed superb binding performance toward dyes with the maximum extraction capacity up to 1.18 mg/mg (basic blue 26) and fast binding equilibrium within 1 min. Colorimetric cards with colors mapping to the dosage gradients of dyes were prepared by dyes-extracted MCM-41 or dye solutions, then RGB values of colorimetric cards were picked and embedded into a lab-made WeChat applet to build underlying digital colorimetric matrixes. Direct-reading analysis could be realized by automatic alignment of color information with inbuilt database of the applet in both online and offline ways with high sensitivity, in which the signal could still be readout even the dosage variations of dyes as small as 0.1 μg/mL. As proof-of-concept assays, this solution was finally applied to real-timely monitor the adsorption, degradation and recycle of dyes in water environment including industrial wastewater, aquaculture pond water and river water. Fine consistence between direct-reading results and those of colorimetry as well as instrumental technique like spectrometry assured high reliability of this strategy.
研究领域:
环境监测
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水处理
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分析化学
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纳米材料
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传感器
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信息技术
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污染控制
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Siqi Chen,Wei Tang,Huayan Luo,Qingqing Peng,Li Wang,Ruifeng Xie,Zhongmin Su,Fang Chai
Given the profound significance of tracing Fe 3 + in the environment and food, a fluorescent method for monitoring Fe 3+ by gold nanoclusters (MN-AuNCs) as the sensor was proposed in this work. The MN-AuNCs were prepared via a rapid procedure within 15 min utilizing DL-methionine (Met) and N-acetyl-L-cysteine (NAC) as dual ligands. Meanwhile, the introduction of NAC significantly enhanced the fluorescence quantum yield (QY=13.6 %), 1.5 times that of Met-AuNCs. The MN-AuNCs exhibited high sensitivity and selectivity towards Fe 3+ , with a detection limit of 83 nM. The portable intelligent method based on Smartphone RGB recognition was innovatively developed for rapid on-site monitoring of Fe 3+ . Notably, the MN-AuNCs also demonstrated significant antibacterial activity, with inhibition rates of up to 95 % against Escherichia coli and Staphylococcus aureus. This sensor integrates multifunctionality, including rapid preparation, highly sensitive detection and antibacterial action, offering a novel effective tool for serving food safety and human healthcare.
研究领域:
分析化学
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纳米技术
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食品科学
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环境监测
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生物医学工程
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微生物学
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产品关联
DOI
高影响因子
FOOD CONTROL
·
2024
·
IF 5.6
Xianghong Xie,Bangfeng Fu,Mingyu Zhang,Wentao Zhang,Zhenghua Xu,Shuwen Liu,Jianlong Wang
The implementation plan of extending the shelf life of food while ensuring food safety is playing an increasingly important role in promoting global solutions to food waste. Here, we have logically created a new eugenol nanoemulsion to sense spoilage and extend the shelf life. The nano lotion (Eu/SA) was loaded with sodium alginate nanoparticles as carrier, eugenol as antibacterial agent and antioxidant. Fluorescein isothiocyanate (FITC) was utilized concurrently as an indicator by simply mixed with Eu/SA nanoemulsion, then physically deposited on a commercial filter membrane to create smart fluorescent labels. Shrimp with and without the Eu/SA nanoemulsion coating had their freshness monitored using a non-contact tagging technique. And through smartphone integrated with RGB (red/green/blue) analysis for digitization, it was found that the RGB of uncoated shrimp was greater than that of treated shrimp. Additionally, without coating treatment, thiobarbituric acid (TBA), pH and viable bacterial count (TVC) of Shrimp all exceed the established. Eu/SA nanoemulsion offers a more appealing monitoring and preservation integration platform for the food safety industry.
研究领域:
食品科学
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纳米技术
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生物技术
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化学工程
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传感器与执行器
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Qin Chen,Lei Wang,Siyu Li,Weifeng Zhao,Ka Li
Despite significant improvements in acute and chronic wound care, determining optimal timing for individualized dressing changes remains a critical clinical challenge, with a lack of objective and precise evaluation criteria. To meet this need, a multilayer colorimetric dressing is designed that integrates unidirectional exudate drainage, pH, and moisture monitoring. An ice-templated polyurethane sponge featuring aligned microchannel structures is developed to achieve exudate drainage. The pH colorimetric module is fabricated by embedding phenol red indicator into hydrogel via solution diffusion, while the moisture colorimetric module incorporates carbon-encapsulated Fe 3 O 4 (Fe 3 O 4 @C) nanoparticles doped photonic crystal hydrogel. This dressing overcomes the key limitations of traditional electrochemical sensors, which require wired connections and power source, by employing visible light-based colorimetric analysis with RGB quantification. The dressing achieves a unidirectional exudate drainage rate of 2.35 µL s −1 , with a pH monitoring range of 5.0–8.0 and a humidity detection range of 11–100%. Proof-of-concept studies conducted both in vitro and in infected rat models validate the capability of the dressing for real-time monitoring of wound microenvironment pH and humidity levels. This innovative technology offers a clinically viable approach to determine optimal dressing change frequency, thereby enhancing healing outcomes while minimizing infection risks.
研究领域:
生物医学工程
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伤口护理
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智能传感器
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材料科学
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纳米技术
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Qi Pu,Chumeng Wang,Xinyue Yin,Nengsheng Ye,Lu Zhang,Yuhong Xiang
Enrofloxacin (ENR) residues in animal-derived food and water threaten human health. Simple, low-cost and on-site detection methods are urgently needed. Blue emitting carbon quantum dots (CQDs) and orange rhodamine B (RhB) were used as recognition and reference signals, respectively, to construct a ratiometric fluorescence sensor. After the addition of ENR, the color of the sensor changed from orange to blue because hydrogen bonding induced a considerable increase in CQDs fluorescence. Based on this mechanism, a simple and low cost on-site portable sensing platform was constructed, which integrated a stable UV light strip and a smartphone with voice-controlled phototaking function and an RGB app. The t -test results of spiked ENR recoveries for diluted milk, honey and drinking water revealed no significant differences between the ratiometric fluorescent sensor and portable sensing platform. Thus, this portable sensing platform provides a novel strategy for on-site quantification of quinolone antibiotics in foodstuffs and environmental water.
研究领域:
分析化学
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环境科学
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食品科学
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生物技术
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Ying Li,Yuyang Zhang,Rida Javed,Rui Li,Hongbin Zhao,Xing Liu,Chenghui Zhang,Hongmei Cao,Daixin Ye
Recently, nanozymes as an outstanding alternative to natural enzymes has attracted wide attention because of its high stability performance. In this study, P N C nonmetal nanozymes with high oxidase-like activity was synthesized can specifically catalyze colorless 3,3,5,5-tetramethyl-benzidine(TMB) to form blue oxidized TMB (TMBox). In the presence of nitrite, it further oxidizes TMBox to obtain yellow derivative products attributed to nitrite inducing diazotization reaction in TMBox. Based on this principle, a colorimetric and electrochemical sensing system was developed, and the ultra-sensitive multi-mode detection of nitrite was realized by combining RGB mode of smart phone, UV–Vis spectrum and electrochemical method. Compared with single signal detection, the multi-mode sensing system can realize self-validation to achieve more reliable detection results. What's more, the developed multi-mode sensing could quickly and sensitively detect nitrite in real sample, especially RGB mode of smart phone meeting the equipment limited areas, suggesting a broad application prospects in food safety.
研究领域:
分析化学
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材料科学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Ying Huang,Xiangrong Liu,Tiantian Shen,Wang Li,Jiali Ren,Haiyan Zhong
The detection techniques for glyphosate residues have garnered attention due to the potential toxicity associated. Herein, we introduced a fluorescent “turn-on” strategy, leveraging competitive coordination with iron, for glyphosate detection. We synthesized iron-based metal-organic frameworks (Fe-MOFs) at room temperature. Among them, 2,5-dihydroxyterephthalic acid (DOBDC) acted as a ligand to produce strong fluorescence, and iron ions acted as a quencher to quench the fluorescence of DOBDC. Another ligand, 2-nitroterephthalic acid, contained nitro quenching of the fluorescence, giving it a lower background. Glyphosate competed with the ligands for ions, weakening the interaction between ions and the ligands. This disruption restored the fluorescence emission at 535 nm, enabling glyphosate detection. To facilitate field application, Fe-MOFs were encapsulated within agarose to create a functional hydrogel. Glyphosate penetrated the hydrogel and resulting in fluorescence “turn-on”. Remarkably, this method facilitated visual detection through smartphone photography coupled with RGB (red/green/blue) analysis, offering a user-friendly and portable solution.
研究领域:
环境科学
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分析化学
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材料科学
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传感器和检测技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2024
·Vol. 26
·期 11
·1-13
·
IF 2.1
Ye Qianyun,Wang Wenhao,Jiang Mingxin,Sun Xiaohuan,Han Jie
The peroxidase (POD)-like nanozymes are regarded as facile and convenient toolkits for the quantification of ascorbic acid (AA). Nevertheless, their insufficient specificity for AA in comparison to other biological antioxidants, such as glutathione (GSH) and cysteine (Cys), severely hindered the discrimination of AA in complex systems. To attain simultaneous quantification and discrimination of AA from GSH and Cys, a CuS nanoparticles-based sensor array with multichannel output signals is constructed in this study. The CuS nanoparticles exhibit superior POD-like activity and can effectively initiate the oxidation of 3, 3′, 5, 5′-tertamethylbenzidine (TMB) to oxidized TMB (oxTMB), accompanied by a measurable change in UV–Vis absorption, solution color and photothermal performance. However, in the presence of antioxidants, the aforementioned process is inhibited and the oxTMB is reduced back to TMB, resulting in signal (UV–Vis absorption, RGB and photothermal heating temperature) changes corresponding to the identity and concentration of antioxidants. As a consequence, by creating a finger print pattern using the multichannel output signals through linear discriminant analysis (LDA) and principal component analysis (PCA), the CuS nanoparticle-based sensor array enables the simultaneous quantification and discrimination of AA from GSH and Cys both in aqueous solution and human serum. This study presents a novel approach for the precise quantification and differentiation of AA and shows great potential in practical application.
研究领域:
分析化学
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纳米技术
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生物化学
·
传感器
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DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 41
·14938-14945
·
IF 7.393
Lirong Wang,Tailin Xu,Xuecheng He,Xueji Zhang
Recent advances in wearable sweat sensors with noninvasive health monitoring capabilities have provided enormous potential for point-of-care testing (POCT) diagnostics and personalized medicine. In this paper, we present a flexible, self-healable, adhesive and wearable hydrogel patch for on-demand sweat colorimetric detection. Such a user-specific wearable hydrogel patch is simply prepared by the solvent displacement method, and can directly attach to human skin for in situ sweat sampling and colorimetric analysis without any complicated preparation steps. This wearable hydrogel patch shows excellent reliability and stability for measuring pH (4–9), glucose (0–2 mM), Cl− (0–100 mM) and Ca2+ (0–16 mM) in human sweat through integration with smartphones. The analysis and detection of multiple sweat biomarkers of 15 healthy volunteers have been successfully realized by effectively converting the analyte concentration into RGB digital signals through the wearable hydrogel patch. Such a wearable hydrogel patch with flexible, self-healable, adhesive properties can achieve on-demand in situ sweat colorimetric detection, holding great potential in point-of-care devices.
研究领域:
生物材料
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可穿戴技术
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生物医学工程
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即时诊断
·
健康监测
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 14
·147520
·
IF 3.721
Xinyi Wang,Liubing Kong,Shuqi Zhou,Tao Liang,Hao Wan,Ping Wang
Photoluminescence (PL) sensors based on quantum dots (QDs) are difficult to achieve exact detection in sample waters. In this paper, polyvinyl alcohol (PVA) based CdTe/ZnS/CdS QDs and fluorescein isothiocyanate (FITC) fluorophores were used to build a ratiometric PL sensor. Combining with the homemade smartphone-based PL E-eye, the Cd2+ exact detection can be achieved. PVA was used to connect QDs and FITC fluorophores without unnecessary ligand exchange and purification. For QDs fluorophore, ethylenediaminetetraaceticacid (EDTA) was used on the surface to induce the specifically Cd2+ recognition site. For FITC fluorophore, the PL remains unchanged in this experiment. Thus, the ratio of two fluorophores can be used to provide a built-in correction. The PL changes with the increase of Cd2+ concentrations could be displayed as a visual color change on the smartphone. Further quantitative analysis could be carried out by the RGB value of the picture through the App in less than 1 min The ratio of R/G is linear to Cd2+ concentration in the range of 1–2000 μg l−1 with a low LOD of 0.057 μg l−1 (S/N). Compared with traditional analysis methods, the PL ratiometric method with PL E-eye is portable, rapid, visible and highly selective especially in discriminate Cd2+ from Zn2+.
研究领域:
环境科学
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分析化学
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纳米技术
·
光学传感
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DOI
高影响因子
危险品化学品经营许可证（带存储）