JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2016
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IF 3.782
Chenxia Hao,Tao Zhou,Shaopu Liu,Linlin Wang,Bowen Huang,Nianxi Kuang,Youqiu He
A dual-channel optical sensing platform which combines the advantages of dual-wavelength overlapping resonance Rayleigh scattering (DWO-RRS) and fluorescence has been designed for the detection of diminazene aceturate (DA). It is based on the use of thioglycolic acid-wrapped CdTe/CdS quantum dots (Q-dots). In the absence of DA, the thioglycolic acid-wrapped CdTe/CdS Q-dots exhibit the high fluorescence spectrum and low RRS spectrum, so are selected to develop an easy-to-get system. In the presence of DA, the thioglycolic acid-wrapped CdTe/CdS Q-dots and DA form a complex through electrostatic interaction, which result in the RRS intensity getting enhanced significantly with new RRS peaks appearing at 317 and 397 nm; the fluorescence is powerfully quenched. Under optimum conditions, the scattering intensities of the two peaks are proportional to the concentration of DA in the range of 0.0061–3.0 μg mL −1 . The detection limits for the two single peaks are 4.1 ng mL −1 and 3.3 ng mL −1 , while that of the DWO-RRS method is 1.8 ng mL −1 , indicating that the DWO-RRS method has high sensitivity. Besides, the fluorescence also exhibits good linear range from 0.0354 to 10.0 μg mL −1 with a detection limit of 10.6 ng mL −1 . In addition, the system has been applied to the detection of DA in milk samples with satisfactory results.
研究领域:
分析化学
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生物医学工程
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DOI
PubMed
高影响因子
RSC Advances
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2018
·Vol. 8
·期 54
·31121-31128
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IF 2.936
Feng-Xia Liang,Lin Liang,Xing-Yuan Zhao,Xiao-Wei Tong,Ji-Gang Hu,Yi Lin,Lin-Bao Luo,Yu-Cheng Wu
In this work, we reported the utilization of mesoporous α-Fe2O3 films as optical sensors for detecting organic vapors. The mesoporous α-Fe2O3 thin films, which exhibited obvious Fabry–Perot interference fringes in the reflectance spectrum, were successfully fabricated through electrochemical anodization of Fe foils. Through monitoring the optical thickness of the interference fringes, three typical organic species with different vapor pressures and polarities (hexane, acetone and isopropanol) were applied as probes to evaluate the sensitivity of the α-Fe2O3 based interferometric sensor. The experiment results showed that the as-synthesized mesoporous α-Fe2O3 interferometer displayed high reversibility and stability for the three organic vapors, and were especially sensitive to isopropanol, with a detection limit of about 65 ppmv. Moreover, the photocatalytic properties of α-Fe2O3 under visible light are beneficial for degradation of dodecane vapor residues in the nano-pores and refreshment of the sensor, demonstrating good self-cleaning properties of the α-Fe2O3-based interferometric sensor.
研究领域:
材料科学
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光学传感
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化学传感器
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纳米技术
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环境监测
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DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2025
·
IF 4.5
Hao Liu,Lingling Li,Hao Ke,Hua Tu,Yuheng Zuo,Yi Zhou,Jiangnan Zhang,Zhao Li,Ai Zhou
A long-period fiber grating (LPFG) sensor functionalized with titanium dioxide-chitosan/poly(acrylic acid) (TiO2-CS/PAA) composite film was proposed for detecting lead ion (Pb2+) concentration. The sensor was fabricated by sequentially coating TiO2-CS/PAA composite functionalized film on the LPFG surface via the Layer-by-Layer self-assembly (LbL) method. The CS/PAA layer acts as a general sensing film, with the abundant amino (-NH2) and hydroxyl (-OH) groups on chitosan providing sufficient chelation sites for Pb2+. Incorporation of PAA significantly improves both adsorption efficiency and mechanical stability. The sensitivity of the sensor is further enhanced by inserting a TiO2 layer with a high refractive index (RI), which can reduce the RI difference between the fiber and the external environment. Experimental results demonstrated that the resonance wavelength of LPFG exhibited a blue shift with the increase of Pb2+ concentration, achieving a maximum sensitivity of 36.5 nm/μM, a limit of detection (LOD) of 9.3 nM (0.00193 mg/L), and a rapid response time of approximately 10 minutes, along with high selectivity toward Pb2+. The proposed sensor features simple fabrication, excellent selectivity, and robust stability, indicating significant potential for Pb2+ monitoring applications.
研究领域:
生物传感
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环境监测
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分析化学
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纳米材料
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光学检测
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DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2025
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IF 4.9
Quanwang Niu,Junwen Yu,Xiyuan Chen,Xiaohong Yan,Xiangfu Wang
Optical approaches for logic operations and sensing, compared with traditional electrical systems, possess advantages of rich tunability and multi-environmental stimulus response. In this study, Eu 3 + /Dy 3+ -doped Y 2 Mo 3 O 12 phosphors are investigated, focusing on their photoluminescence intensity enhancement as the temperature increases. Based on these properties, multiple functional systems were designed and implemented. These include light and thermal input logic circuit system achieved by modulating emission intensities, and a spatially encoded matrix capable of performing six different logic operations. Furthermore, an optical thermometer utilizing fluorescence intensity ratio variations and a dual-modal sensor integrating optical temperature detection with electrical pressure sensing, exhibiting minimal signal crosstalk, were developed. These results suggest that Y 2 Mo 3 O 12 : Eu 3+ , Dy 3+ phosphors hold great potential for advanced optoelectronic logic and sensing applications.
研究领域:
光电材料
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智能传感器
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功能荧光材料
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温度与压力传感
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光学逻辑电路
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DOI
高影响因子
TALANTA
·
2023
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IF 6.1
Xiyun Zhan,Kun-Lin Yang,Dan Luo
Antimony is highly toxic and a key water pollutant , which needs to be monitored closely. To date, however, most analytical methods for antimony detection are quite limited because they are complicated, expensive, and not suitable for real-time monitoring of antimony. In this study, a label-free and rapid method for antimony ions (Sb 3+ ) detection is developed based on liquid crystals and a 10-mer poly-adenine oligonucleotide as a specific recognition probe for the first time. The working principle is based on the binding of the oligonucleotide to Sb 3+ , which weakens the interaction between the oligonucleotide and cationic surfactants . As a result, the event induces a planar-to-homeotropic orientational change of liquid crystals and a bright-to-dark optical change under crossed polars. This liquid crystal-based optical sensor exhibits a rapid response to Sb 3+ in 10 s, a detection range between 20 nM and 5 μM, and a detection limit at 6.7 nM calculated from 10-mins assay time. It also shows good selectivity against other metal ions including Ag + , Cd 2+ , Cu 2+ , Fe 3+ , K + , Mg 2+ , Mn 2+ , Na + , Pb 2+ , and Zn 2+ . Moreover, this system can be used to detect Sb 3+ in aqueous solutions with different pH or ionic strengths . This simple, fast, and low-cost liquid crystal-based sensing approach with high sensitivity and selectivity has a high potential for detecting Sb 3+ in natural environments and industrial wastewater.
研究领域:
分析化学
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环境科学
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材料科学
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光学
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DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Xiaoguang Gao,Lingyu Li,Rong Deng,Wenjuan Zhao,Xiaoliang Zhang,Zhibo Liu
Quantitative detection of disease markers at ultralow concentrations has rigorous requirements on the performance of graphene-based optical sensors (GOSs). In this work, a localized surface plasmon resonance-modulated GOS was developed by uniformly dispersing gold nanorods (AuNRs) on the graphene surface. As an optical sensor based on refractive index sensing, the refractive index resolution and sensitivity of the optical sensor reached 2.34 × 10–9 and 2.14 × 107 mV/RIU, respectively. The sensitivity of the optical sensor toward IgG immunoassay reached 6.5 mV (μg mL–1)−1, a value 7-fold that without the AuNRs. A limit of detection of 1.22 ng/mL toward IgG immunoassay was obtained, a value one-tenth that without the AuNRs. Most critically, it has been demonstrated that the improved performance of the optical sensor was attributed to the enhanced evanescent field on graphene caused by the coupling of the evanescent field and LSRR of AuNRs. The proposed optical sensor in this study has the characteristics of high sensitivity, being label-free, and a simple preparation process. The successful application of the proposed sensor will also greatly promote the development of quantitative detection of disease markers at ultralow concentrations.
研究领域:
光学传感
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纳米技术
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生物传感器
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生物医学工程
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DOI
高影响因子
JOURNAL OF FLUORESCENCE
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2025
·
IF 3.1
Wang Jing,Ren Lu,Liu Yanqi,Wang Ping,Chen Yujia,Zhang Dawei
In this study, a novel imidazole-Schiff base fluorescent probe, EBI, was designed and synthesized. The molecular structure of EBI was systematically characterized by FT-IR, 1 H NMR, 13 C NMR and HR-MS. This study found that this probe could exhibit highly sensitive and selective fluorescence responses to Al 3+ in an EtOH/H 2 O (1:1 v/v) mixed solvent. The optical properties of EBI were systematically investigated using fluorescence spectroscopy and UV-Vis absorption spectroscopy. The results showed that the binding of EBI with Al 3+ could trigger a significant fluorescence enhancement effect, reaching a stable state within approximately 10 min, and that the interference from other common metal ions could be ignored. To further clarify its mechanism of action, various methods, including the Job plot, Benesi-Hildebrand experiment, 1 H NMR titration, and DFT calculation, were employed to thoroughly investigate the coordination behavior of EBI with Al 3+ . The study demonstrated that EBI and Al 3+ formed a complex in a 1:1 molar ratio, with a detection limit (LOD) of 74.75 nM. The fluorescence quenching of EBI–Al 3+ by PO 4 3− was also evident in the selected anion range. These results, based on the fluorescence “OFF-ON” mechanism, enable us to construct various types of molecular logic gates. This sensing system is capable of on-site, trace-level, real-time, and rapid detection of Al 3+ . Graphical
研究领域:
分析化学
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无机化学
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材料科学
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传感器技术
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环境监测
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配位化学
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产品关联
DOI
PubMed
高影响因子
ACS ES&T Water
·
2024
·
IF 4.8
Zhennan Zhou,Haibo Li,Yikang Lin,Jiali Fan,Hua Tong,Jing Yang,Wei Liu,Gangfeng Ouyang
It is necessary and urgent to develop new materials that are sensitive to antibiotics and can detect them in wastewater. Here, we report a zwitterionic copper(I)-iodide hybrid cluster with strong luminescence and excellent stability. We demonstrate for the first time that this compound can be an efficient optical sensor for tetracyclines, a widely used type of antibiotic, in an aqueous system, with the limit of detection reaching as low as 521–851 ppb. Further, possible electron and energy transfer mechanisms are discussed. This study has opened up new applications for this type of material in the field of chemical sensing.
研究领域:
材料科学
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分析化学
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环境科学
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DOI
高影响因子
Biosensors-Basel
·
2024
·Vol. 14
·期 7
·332
·
IF 4.9
Xiaonan Zhang,Lizhong Zhang,Han Li,Yang Xu,Lingqin Meng,Gengyu Liang,Bei Wang,Le Liu,Tian Guan,Cuixia Guo,Yonghong He
The demand for accurate and efficient immunoassays calls for the development of precise, high-throughput analysis methods. This paper introduces a novel approach utilizing a weak measurement interface sensor for immunoassays, offering a solution for high throughput analysis. Weak measurement is a precise quantum measurement method that amplifies the weak value of a system in the weak interaction through appropriate pre- and post-selection states. To facilitate the simultaneous analysis of multiple samples, we have developed a chip with six flow channels capable of conducting six immunoassays concurrently. We can perform real-time immunoassay to determine the binding characteristics of spike protein and antibody through real-time analysis of the flow channel images and calculating the relative intensity. The proposed method boasts a simple structure, eliminating the need for intricate nano processes. The spike protein concentration and relative intensity curve were fitted using the Log-Log fitting regression equation, and R2was 0.91. Utilizing a pre-transformation approach to account for slight variations in detection sensitivity across different flow channels, the present method achieves an impressive limit of detection(LOD) of 0.85 ng/mL for the SARS-CoV-2 the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike protein, with a system standard deviation of 5.61. Furthermore, this method has been successfully verified for monitoring molecular-specific binding processes and differentiating binding capacities.
研究领域:
生物医学工程
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量子物理
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分析化学
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医学诊断
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产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 3
·1393-1403
·
IF 6.123
Liu Siyuan,Shi Zhenxu,Wang Xuhong,Gong Yanbin,Li Xijun,Jia Xin,Gan Lin,Huang Jin
Assembling cellulose nanocrystals (CNCs) can induce solid-state photoluminescence based on Stokes scattering. Such photoluminescent materials are free of photo-quenching and show great potential in optical applications, whereas poor flexibility of assembled CNC arrays limits their applications. Here, a binary co-assembly of 1D nanoparticles and long-chain polymers was explored to produce the uniaxial CNC arrays into transparent poly(vinyl alcohol) (PVA) membranes, which enhanced the mechanical properties, especially ductility. Besides, the CNC assembly was controlled by adjusting the mass ratio between CNCs and PVA. The result indicated that co-assembling with PVA could improve the uniaxial orientation of CNC arrays, which played a crucial role in enhancing the emission quantum efficiency (EQE). Stretching the PVA/CNC membrane could further induce an enhancement in EQE together with a blue shift in excitation wavelength. The mechanism study on stimulation-response suggested that the EQE enhancement and blue shift came from the change in uniaxial orientation degree and periodicity of the CNC assembly, respectively. Since the stimulation-responsive enhancement in EQE (from ca . 40 to 60%) can even be observed by naked eyes, we believe such cellulose-based materials can be widely used in optical sensors.
研究领域:
材料科学
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光学
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纳米技术
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Yu-Han Geng,Yu Xin,Jing Du,Ming-Yi Cui,Yuan-Yuan Liu,Le-Xi Zhang,Bin Ding
Chirality is a ubiquitous phenomenon in nature and has attracted wide attention in the biomedicine, pharmaceutics and biosensing research fields. Enantiomeric recognition of chiral compounds, especially chiral drugs and chiral amino acids, is important for human health and nutrition. In this work, through the encapsulation of L-His&R6G (L-His = L-Histidine; R6G = Rhodamine 6G) into MOF@MOF framework ZIF-67@ZIF-8, composited material L-His&R6G@ZIF-67@ZIF-8 can be obtained. Additionally, through the etching process, a unique yolk-shell ZIF-8 chiral composite optical sensors L-His&R6G@ZIF-8 ( 1 ) can be successfully prepared. Photo-luminescent (PL) experiment also reveals that 1 can highly sensitively detect L-Proline (L-Pro) through the “turn-on” detection strategy (K BH = 1.22 × 10 4 M −1 and detection limit 1.9 μM). Further yolk-shell L-His&R6G@ZIF-8-based fabricate flexible mixed-matrix membranes has been prepared using doctor-blading technique, which show significant fluorescence enhancement effect under ultraviolet lamp. This work also provides the unique example of preparing chiral yolk-shell framework composite sensors, which have broad application in chiral sensing area.
研究领域:
生物医学
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药学
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生物传感
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材料科学
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产品关联
DOI
PubMed
高影响因子
Cyborg and Bionic Systems
·
2025
·
IF 18.1
Ruitong Bie,Xi Chen,Zhe Yang,Dong An,Yifei Yu,Qianyu Zhang,Ce Li,Zirui Zhang,Dingchen Wang,Jichang Yang,Songqi Wang,Binbin Cui,Dongliang Yang,Lin Hu,Zhongrui Wang,Linfeng Sun
Motion recognition, especially the distinction between high-speed and low-speed movements, is a challenging computational task that typically requires substantial resources. The extensive response range required to detect such variations in speed often exceeds the capabilities of traditional CMOS technology. This report introduces a SnS 2 -based in-sensor reservoir that offers an effective solution for detecting a variety of motion types at sensory terminals. By leveraging in-sensor reservoir computing, the device excels at classifying different motions across a wide velocity spectrum, providing a novel and promising method for motion recognition. The conductance of SnS 2 channel under light stimulation is governed by the trapping and recombination of photogenerated carriers at the inherent defect states, which contributes to the flexible optically dynamical sensing function of the device to varying illumination times. These attributes make the device versatile for both optical sensing and synaptic emulation. The findings suggest that such a SnS 2 -based device could be instrumental in advancing motion recognition capabilities for developing next-generation artificial intelligence systems.
研究领域:
神经形态工程
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光电传感
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人工智能
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储层计算
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二维材料
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）