SENSORS AND ACTUATORS A-PHYSICAL
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2020
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IF 2.904
Gulgina Mamtmin,Renagul Abdurahman,Yin Yan,Patima Nizamidin,Abliz Yimit
A highly sensitive and selective optical sensor device based on a porphyrin-coated ZnO thin film/K + ion-exchanged glass composite optical waveguide (COWG) layer was developed. The surface of the ZnO film was coated with a thin film of 5,10,15,20-tetrakis-(4-methoxyphenyl) porphyrin by the spin-coating or immersion method. The optical properties of the films were probed by UV–vis and Fourier-transform infrared spectroscopies. The gas sensing performance was also examined in detail. The high sensitivity, room temperature operation, good selectivity, and reproducibility of the sensor render it a promising candidate for industrial use and in environmental monitoring.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Xinghui Liu,Saraschandra Naraginti,Fuchun Zhang,Kuppusamy Sathishkumar,Vadivel Subramaniam,Krishnamoorthy Ramachandran,Ashish Kumar,Xiang Guo
The presence of Co 2+ ions in water streams can pose severe health risks to humans due to their health impacts at high concentrations. As a result of its weak interaction with existing adsorbents, selective detection and removal of Co 2+ are challenging. To meet the global challenge, we engineered a mesoscopic silica monolithic architecture of hexagonal mesopores that can detect and remove Co 2+ ions from a wide range of water resources. The direct impregnation of the PDBDP azo-Schiff probe on MSM's surface resulted in strong selectivity for Co 2+ ions. Based on various characterization techniques, it was validated that the developed sensor material exhibits a high surface area and uniform pore structure, which can provide a high adsorption capacity and ultrafast sensing kinetics. A clear sensing mechanism was demonstrated using Job's plot, B-H method, and DFT calculation, showing strong interactions between Co 2+ ions and PDBDP imprinted MSM sensor. As a result of optimizing several physicochemical parameters, the naked-eye colorimetric sensing is accompanied by a desirable colour transition from pale yellow to dark red, with LOD and LOQ values of 0.09 & 0.31 ppb, and a linear concentration range of 5.0–150.0 ppb, respectively. Overall, this study provides comprehensive insights into mesoporous materials that remove Co 2+ pollutants from water bodies efficiently.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2018
·Vol. 6
·期 36
·9778-9785
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IF 5.976
Qiang Zhang,Yan Xu,Zhuopeng Wang,Xia Zhang,Zhiguo Xia
Dual-emitting hierarchical Bi4(GeO4)3/Zn2GeO4 hybrid microspheres have been prepared by a facile one-pot hydrothermal synthesis of Zn2GeO4 with the addition of pre-synthesized BiOBr nanoplates. The phase composition and morphology evolution of the Bi4(GeO4)3/Zn2GeO4 composites are investigated depending on the amounts of BiOBr precursor used in the hydrothermal process. The photoluminescence peaks at 412 and 532 nm for the as-prepared Bi4(GeO4)3/Zn2GeO4 are ascribed to Bi3+ emission and defect-related centers in the Zn2GeO4 component, respectively, and the features show a quenching response toward a temperature increase. The fluorescence intensity ratio (FIR) of Bi3+: 3P1–1S0 (412 nm) to the defect emission center of Zn2GeO4 (532 nm) can be exploited as a self-calibrated temperature index for potential thermometer applications. The maximum relative sensitivity (Sr) is 3.96% °C−1 in the temperature range of 20 °C to 100 °C. This work expands the rational design strategy for controllable particle morphology and structure modulation, and further explores their synergetic distinctive properties and potential optical sensor applications.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
SENSORS
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2017
·Vol. 17
·期 6
·1316
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IF 2.677
Zike Jiang,Xinsheng Yu,Yingyan Hao
This paper presents a simple, high resolution imaging approach utilizing ratiometric planar optode for simultaneous measurement of dissolved oxygen (DO) and pH. The planar optode comprises a plastic optical film coated with oxygen indicator Platinum(II) octaethylporphyrin (PtOEP) and reference quantum dots (QDs) embedded in polystyrene (PS), pH indicator 5-Hexadecanoylamino-fluorescein (5-Fluorescein) embedded in Hydromed D4 matrix. The indicator and reference dyes are excited by utilizing an LED (Light Emitting Diode) source with a central wavelength of 405 nm, the emission respectively matches the different channels (red, green, and blue) of a 3CCD camera after eliminating the excitation source by utilizing the color filter. The result shows that there is low cross-sensitivity between the two analytes dissolved oxygen and pH, and it shows good performance in the dynamic response ranges of 0–12 mg/L and a dynamic range of pH 6−8. The optode has been tested with regard to the response times, accuracy, photostability and stability. The applied experiment for detecting pH/Oxygen of sea-water under the influence of the rain drops is demonstrated. It is shown that the planar optode measuring system provides a simple method with low cross-talk for pH/Oxygen imaging in aqueous applications.
研究领域:
生物化学
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环境科学
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分析化学
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DOI
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Peng Zhao,Xuhui Xia,Jia Zheng,Zirui Yuan,Yiyao Luo,Huibo Luo,Yi Ma,Danqun Huo,Changjun Hou
The correct classification of strong-flavored crude baijiu affects its quality and overall standard and is crucial for the intelligent development of the baijiu industry. In this work, we developed a novel optical sensing array using lanthanum-doped carbon dots (La-CDs). Using La-CDs with three metal complex dyes—chromium black T, alizarin red, and dimethylphenol orange—we were able to detect organic acids and tannic acid (TA) in crude baijiu in a way that was both colorimetric and fluorescent for the first time. Based on the indicator displacement (IDA) principle, organic acids competitively replace the dyes' binding sites on La 3+ , causing the dye colors to change to varying degrees. TA quenches the fluorescence of quantum dots through an internal filtering effect. We analyzed the data using pattern recognition algorithms such as HCA, PCA, and LDA, successfully classifying and identifying 16 types of strong-flavored crude baijiu, which included 10 types of carboxylic acids and various grades. In blind tests of 32 crude baijiu samples, the colorimetric method achieved a 94 % accuracy rate, while the fluorescence method achieved 100 %. The sensor demonstrates significant advantages in response speed.
研究领域:
食品科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
TALANTA
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2017
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IF 4.162
Yan Xiong,Jiayi Wu,Qing Wang,Jing Xu,Shenwen Fang,Jie Chen,Ming Duan
In this work, a miniaturized optical sensor was developed for fluoride determination in tea samples to evaluate their specific risks of fluorosis for public health based on evanescent-wave interaction. The sensor design was integrated on the optical fiber by utilizing the evanescent wave produced on the fiber surface to react with sensing reagents. According to the absorption change at 575 nm, fluoride could be determined by colorimetric method and evaluated by Beer's law. With improved performances of small detection volume (1.2 μL), fast analysis (0.41 min), wide linear range (0.01–1.4 mg L −1 ), low detection limit (3.5 μg L −1 , 3σ) and excellent repeatability (2.34%), the sensor has been applied to fluoride determination in six different tea samples. Conventional spectrophotometry and ion chromatography were employed to validate the sensor's accuracy and potential application. Furthermore, this sensor fabrication provided a miniaturized colorimetric detection platform for other hazardous species monitoring based on evanescent wave interaction.
研究领域:
分析化学
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环境科学
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公共健康
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2012
·Vol. 41
·期 9
·2620-2625
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IF 3.838
Wei Huang,Dayu Wu,Genhua Wu,Zhuqing Wang
A reversible solid optical sensor (SGIR) for Hg2+ based on silica gel was designed and synthesized. The binding and adsorption abilities of SGIR for metal cations were investigated with fluorophotometry and cold vapor atomic absorption spectrometry, respectively. The SGIR exhibits high selectivity for sensing Hg2+ over other metal cations in aqueous media because the Hg2+ ion selectively induces a ring opening of the rhodamine fluorophores, and the SGIR was also found to adsorb 72% of Hg2+ ion. The determination of Hg2+ in both tap and lake water samples displays satisfactory results, and the SGIR can also be easily recovered by treatment of a solution of TBA+OH−.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
高影响因子
ANALYTICAL LETTERS
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2024
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IF 1.6
Jin-Wen Liu,Tingting Chen,Meiqun Cai,Yingfeng Qin,Mei Li
Accurate, rapid, and quantitative detection of D-penicillamine (D-PA) in pharmaceutical formulations is imperative for drug quality and clinical medication guidance. Various colorimetric and fluorescent assays have been constructed for D-PA based on nanomaterials. However, the reliable and rapid detection of D-PA in pharmaceutical formulations remains a challenge because these methods suffer from shortcomings such as time-consuming procedures, poor uniformity, and complicated nanomaterial preparation. In this work, an effective and facile homogeneous dual-mode optical sensing strategy was established based on the strong complexation between D-PA and Cu2+ and catalyzed the oxidation of O-phenylenediamine. This platform displayed a sensitive response to D-PA from 5 to 100 µmol/L, with a detection limits of 0.54 µmol/L (fluorescence) and 0.76 µmol/L (colorimetry). As expected, the method was successfully applied to the determination of D-PA in pharmaceutical formulations with satisfactory results. Overall, this developed strategy provides a facile and rapid dual-mode optical platform for D-PA and has great potential in D-PA-related pharmaceutical quality control.
研究领域:
分析化学
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药学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2019
·
IF 8.456
Bolang Wu,Ge Zhu,Alain Dufresne,Ning Lin
Generally produced by solvent sublimation via freeze-drying or critical point drying treatment, nanocellulose-based aerogels have attracted considerable interest in offering the features such as sustainability, available surface reactivity, lightweight, high porosity, and specific surface area. This study presents a novel strategy for the preparation of fluorescent aerogels based on covalent linkage between the natural skeleton of a cellulose nanofibril (CNF) and a fluorescent carbon dot (CD). The maximum CD grafting content on the CNF-based aerogel was 113 mg g–1, providing bright blue fluorescence under ultraviolet radiation with a high fluorescence quantum yield of 26.2%. Besides improved mechanical properties with a 360% increase in compression strength, the covalently bonded CD nanoparticle further serves as a structural stabilizer to endow the characteristic of shape recovery in water for the fabricated fluorescent aerogel. Finally, this aerogel displays high sensitivity and selection on the recognition of NOx and aldehyde species, which is studied for the detection of glutaraldehyde at ultralow concentrations (ppm) in water. Using the innovation of an organic solvent-free route and avoiding the toxic crosslinking reagents or fluorescent sources, the CNF/CD-based fluorescent aerogel developed in this study is a promising functional material for potential optical sensing application.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Wei Chen,Zhiyang Guo,Hao Yu,Qingyun Liu,Min Fu
Glycoproteins play vital roles in living organisms and often serve as biomarkers for some disease. However, due to the low content of glycoprotein in biological fluids, selective detection of glycoproteins is still a challenging issue that needs to be addressed. In this study, molecularly imprinted colloidal array with multi-boronic acid sites for glycoprotein detection under physiological pH was proposed. Monodispersed glycoprotein imprinted particles (SiO 2 @PEI/MIPs) was first prepared based on surface imprinting strategy using horseradish peroxidase (HRP) as template, and polyethyleneimine (PEI) was used to increase the number of boronic acid groups. The binding experiment indicated that the SiO 2 @PEI/MIPs hold satisfactory adsorption capacity (1.41 μmol/g), rapid adsorption rate (40 min) and preferable selectivity toward HRP. Then the SiO 2 @PEI/MIPs was assembled into close-packed colloidal array to construct a label free optical sensor (denoted as GICA). Benefiting from the high ordered photonic crystal structure, binding of HRP onto the GICA could be directly readout from the changes in structure color and diffracted wavelength. The structure color of the GICA changed from bright blue to yellow with the diffraction wavelength red shifted 59 nm when the HRP concentration increased from 2.5 to 15 μmol/L. Importantly, the GICA was capable of detecting HRP from human serum samples. All those results indicated the potential of the GICA for naked-eye detection of glycoprotein.
研究领域:
生物化学
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分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
LIQUID CRYSTALS
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2022
·
IF 2.676
Yuxian Zhang,Zhou Yang,Qiong-Hua Wang
We propose an optical sensor based on the inverse opal (IOP) photonic structure infiltrated by a typical liquid crystalline material doped by the reactive compounds. Benefiting from the unique photonic property of the IOP structure, the composite sensor shows not only a typical textural change but also a responsive photonic band gap (PBG) upon the exposure to butylamine (BA) vapour, due to the reorientation of the liquid crystalline molecules induced by the chemical reaction between the dopant and the BA vapour. This approach simplifies the measurement process by capturing the PBG signal instead of the polarised optical texture, which does not require high cost or complex instruments and might be instructive for detecting other volatiles.
研究领域:
材料科学
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化学传感
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产品关联
DOI
高影响因子
Food Chemistry-X
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2024
·
IF 6.5
Jinxin Chen,Cheng Zhang,Lunzhao Yi,Fengmin Duan,Ying Gu,Kun Ge,Xuejing Fan
The improvement of detection accuracy without loss of rapidity and sensitivity by optical sensors in complex food analysis is still full of challenges owing to the matrix interference. Herein, a novel and simple self-calibration colorimetric/fluorescence/surface-enhanced Raman spectroscopy (SERS) tri-modal optical sensor based on aminated Rhodamine 6G (R6G-NH 2 ) was developed for highly rapid, sensitive, and accurate detection of Hg 2+ in food samples. The high recognition specificity of R6G-NH 2 for Hg 2+ can be achieved through the metal chelation interaction between Hg 2+ and -NH 2 , -COOH groups in R6G-NH 2 with formation of R6G-NH 2 -Hg 2+ -R6G-NH 2 complex. The DFT and FDTD simulations were adopted to confirm the theoretical feasibility in Hg 2+ detection by tri-modal optical. Under the optimum conditions, the analytical method based on self-calibration tri-modal optical sensor for Hg 2+ detection was established with promising properties (rapidity, linearity, linear range, LOD, and LOQ), providing a strategy in rapid, selective, sensitive, and accurate detection for food safety.
研究领域:
分析化学
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食品科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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