- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Upconversion fluorescent nanoparticles based-sensor array for discrimination of the same variety red grape wines
摘要： In this research, a novel fluorescent sensor array based on upconversion nanomaterials (UCNPs) for the discrimination of the same variety red grape wines from different manufacturers was developed. The sensor array was composed of six elements: one positively charged UCNPs modified with guanidine groups (UCNPs@GDN), two negatively charged UCNPs modified with sulfonic acid groups (UCNPs@SO3H) and phosphonic acid groups (UCNPs@PO(OH)2), respectively, and their mixture 1 (UCNPs@GDN + UCNPs@SO3H), mixture 2 (UCNPs@GDN + UCNPs@PO(OH)2) and mixture 3 {UCNPs@GDN + UCNPs@SO3H + UCNPs@PO(OH)2}. The discrimination mechanism is mainly attributed to the emission of those upconversion fluorescent nanoparticles being quenched by organic ingredients that usually exist in red grape wines. The discrimination of red grape wines was carried out by employing UCNPs@GDN, UCNPs@SO3H and UCNPs@PO(OH)2 in pH = 7.0 HEPES buffer, the mixture 1 and mixture 2 in pH = 9.0 PBS buffer, and mixture 3 in pH = 6.0 Tris–HCl buffer. Principal component analysis (PCA) of the data obtained from our established array showed obvious distinction among the nine red grape wines from different manufacturers. The present work is expected to inspire more marvellous research in the fields of UCNPs and red grape wines identification.
关键词： red grape wines,fluorescence quenching,sensor array,upconversion nanoparticles,discrimination
更新于2025-11-14 15:18:02
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Sensor Localization for Highly-Deformed Partially Calibrated Arrays with Moving Targets
摘要： In this letter, a sensor localization technique for highly-deformed partially calibrated arrays with multiple moving targets is proposed. The deformed array is divided into several subarrays. The first subarray is composed of the pre-calibrated sensors, while the sensors in the other subarrays are uncalibrated. The positions of the sensors are estimated from the phase differences between the pre-calibrated sensors and the uncalibrated sensors. The phase ambiguities caused by the highly-deformed sensor positions can be solved using the subspace orthogonality and the movement of multiple targets. Simulation results evaluate the performance of the proposed method, and the Cramer–Rao bounds are compared.
关键词： highly-deformed sensor array,partially calibrated sensor array,phase ambiguity,Sensor localization
更新于2025-09-23 15:23:52
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Fabrication and characterization of VOC sensor array based on SnO2 and ZnO nanoparticles functionalized by metalloporphyrins
摘要： A volatile organic compound (VOC) sensor array based on metal oxide nanoparticles (MOX NPs) functionalized by metalloporphyrins (MPPs) was demonstrated. The VOC sensor array was composed of four single sensors based on SnO2 NPs/cobalt-porphyrin, SnO2 NPs/zinc-porphyrin, SnO2 NPs/nickel-porphyrin and ZnO NPs/cobalt-porphyrin. The MOX NP/MPP-based sensors were fabricated by drop-casting the MOX NPs dispersion and MPPs solution onto a MEMS platform. The fabricated sensor successfully detected toluene at a concentration as low as 20 ppb, which is below the limit detection concentration of previously reported porphyrin-based VOC sensor arrays. We also confirmed the selectivity between benzene, toluene, ethylbenzene, and xylene (BTEX) by using principal component analysis in contrast to previous studies on MOX/MPP-based sensor. BTEX was classified from 1 to 9 ppm at a resolution of 2 ppm, and the sensor array showed stable performance even after considerable impact.
关键词： Gas sensor array,Porphyrin,Principle component analysis,Metal oxide,Volatile organic compound
更新于2025-09-23 15:22:29
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[IEEE OCEANS 2018 MTS/IEEE Charleston - Charleston, SC, USA (2018.10.22-2018.10.25)] OCEANS 2018 MTS/IEEE Charleston - Optimal design of frequency-invariant beamformers for circular arrays
摘要： This paper proposes a optimal method designing frequency-invariant beamformers for circular arrays. First, the desired beampattern is expressed as a general complex-weighted form. Second, the weighting vectors at each frequency are accurately derived by approximating to the desired beampattern from the minimum mean square error perspective, all of which are found to be close-form functions of the desired complex weighting vectors. Third, a multiple optimization problem is formulated, and its solution gives the optimal desired weighting vector subject to different constraints. Finally, the weighting vectors at other frequencies can be directly computed based on the previously derived analytical functions. The proposed method provides flexible schemes to design different optimal frequency-invariant beamformers for circular sensor arrays. The good performance of the proposed method is demonstrated using simulations and experimental results.
关键词： circular sensor array,Frequency-invariant beamforming,multi-constraint optimization
更新于2025-09-23 15:22:29
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Stereoselective Sensing of <scp>l</scp> - and <scp>d</scp> -Amino Acids: Development of a Fluorescence-Array Based on Readily Available Chiral Phosphoric Acids
摘要： A chiral sensor-array for the identification of amino-acids was developed, using six readily available bis- and tris-phosphoric acids in combination with Ni2 + and Eu3 +, resulting in a fluorescence-based array with twelve sensors. This array was successfully applied for the chemoselective identification of 19 amino-acids, but also for the enantioselective discrimination between the l- and d-enantiomers.
关键词： amino-acids,chiral sensor-array,fluorescence-based array,enantioselective discrimination,chemoselective identification
更新于2025-09-23 15:21:01
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[IEEE 2018 2nd International Conference on Biomedical Engineering (IBIOMED) - Bali, Indonesia (2018.7.24-2018.7.26)] 2018 2nd International Conference on Biomedical Engineering (IBIOMED) - Design of Mass-Sensitive Sensor Array for Biomedical Application: Sensing Lipoproteins
摘要： Herein we report the design of a novel sensor array based on molecularly imprinted polymer (MIP) for low-density lipoprotein (LDL) and high-density lipoprotein (HDL) determination. MIP of each lipoprotein class comprising co-monomer of methacrylic acid (MAA) and vinyl pyrrolidone (NVP) in the ratio of 3:2 and 2:3, were screened onto three-electrode quartz crystal microbalance (QCM) as selective elements toward LDL and HDL, respectively. Sensor array device reveals concentration-dependent sensor responses toward varying amount of each standard LDL and HDL solution with a linear correlation coefficient of R2 = 0.89 and 0.99, respectively. HDL-MIP presents cross-reactivity to LDL at 9-19% compared to the LDL-MIP signal. LDL-MIP also has cross-reactivity to HDL at 0-3% of LDL-MIP responses. All sensor signals are fully reversible and the sensor array can be reused.
关键词： molecularly imprinted polymers,low-density lipoprotein,high-density lipoprotein,QCM sensor array
更新于2025-09-23 15:21:01
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[IEEE 2018 IEEE SENSORS - New Delhi, India (2018.10.28-2018.10.31)] 2018 IEEE SENSORS - Rectangular Array Current Transducer with Integrated Microfluxgate Sensors
摘要： Novel rectangular yokeless current transducer with the range 400 A using 16 microfluxgate sensors around the busbar conductor is presented in this paper. Compared to yokeless transducers utilizing the differential pair of magnetic sensors, our solution has much better suppression of external currents (lower crosstalk). Compared to industrial transducers with yoke, the new transducer has 10-times lower noise, 10-times better temperature stability, and same crosstalk. Sensor design, different methods for calculating the current and temperature dependence are presented in this paper. Crosstalk error is examined in dependence on the number of the operating sensors and external current position.
关键词： Finite element modelling,current sensor,microfluxgate sensors,rectangular sensor array
更新于2025-09-19 17:15:36
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Performance of Arrayed Microring Resonator Sensors with the TriPleX Platform
摘要： Integrated-optical (bio) chemical sensors are more and more commercialized, mainly because of their high intrinsic sensitivity in combination with the possibilities they offer for integration in optofluidic devices. The microring resonator (MRR), for example, is a very feasible structure to be used as microarray sensor element for multiplex biosensing. Fabrication of MRRs has been described in the case of the TriPleX platform employing well-defined stacks of stoichiometric Si3N4 and SiO2 material. This platform allows for a wide variety of applications, due to its intrinsic low loss and its transparency for the VIS/NIR wavelength range. In the present paper, we describe the recent achievements in the characterization of arrays of these MRRs regarding temperature sensitivity, refractive index sensitivity and protein immobilization performance. Furthermore, the use of a reference channel/reference MRR is demonstrated in order to show the advantage of compensation of unintended change in temperature or sample composition. The refractive index sensitivity was determined to be 104 nm/RIU and the limit of detection was about 2 × 10-6 RIU. MRRs appeared to behave very comparable (expressed as the coefficient of (intra-array) variation (CV)) regarding the response to temperature (CV≈0.3%) as well as refractive index (CV<0.1%). Furthermore, it is shown that protein immobilization onto the different MRRs of the same arrays can be realized in a comparable way (CV<3%). A good comparability (i.e., a low variation) in these aspects allows for the use of internal referencing in order to compensate for unintended change in temperature or refractive index and also helps to attain a high assay precision in the ultimate biosensing application. Ongoing research is focused on the integration of more functionality on chip and further miniaturization in order to allow for fabrication of complex, though affordable, sensor devices.
关键词： Refractive index,Biosensor,MRR,Sensor array,Integrated optics,Microring resonator
更新于2025-09-19 17:15:36
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Artificial tailored catalytic activity for identification of 6 kinds of volatile organic compounds via the light-regulated electrochemical reaction
摘要： Light-regulated electrochemical reaction is confirmed to be useful to improve the classification efficiency. However, the use of different photoactive sensing materials results in time-consuming for exploring well-designed materials, besides, the light-regulated electrochemical reaction only improved the classification feature while didn't bring essential difference in the distinguish capability yet. Herein, a zirconia-based electrochemical sensor array comprised of 3 types of ZnO/In2O3 composite sensing materials is fabricated. After illumination, significantly enhancement is witnessed for the response magnitude and detection limit. Additionally, the response signal of the sensor array to part of the examined volatile organic compounds (VOCs) is selectively enhanced and 3 more disparate response patterns are generated. Through inputting all the response patterns into principle component analysis (PCA) software, 6 kinds of concerned VOCs have been fully classified. Conclusively, with utilizing sensing materials with similar composition, the fabrication process of the sensor array can be simplified. Particularly, after exposure to illumination the sensor array consisting of limited photoactive sensing materials (e.g. 3 kinds of materials) can identify even more number of gases (e.g. 6 types of VOCs). We anticipate these promising results shed light on the bright future of designing compact sensing devices for progressively smarter monitoring of concerned gas species.
关键词： Principle component analysis,Light-regulated electrochemical reaction,Volatile organic compounds,Response patterns,Artificial tailored catalytic activity,Zirconia-based sensor array
更新于2025-09-19 17:15:36
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Identification of Bacteria by a Fluorescence Sensor Array based on Three Kinds of Receptors Functionalized Carbon Dots
摘要： The identification of bacteria is a crucial issue in the field of medical diagnosis, environmental monitoring and food safety. Conventional methods need long culturing times, highly skilled operators, or recognition elements specific to each kind of the bacteria. Alternatively, sensor arrays offer a cost-effective and simple approach using multiple cross-reactive receptors. Here, a facilely constructed fluorescence sensing array was developed for the identification of various bacteria. The sensor array consists of three facile synthesized carbon dots functionalized with different receptors (boronic acid, polymixin and vancomycin), which could bind to all the bacteria with different affinity instead of a specific one. A unique molecular fingerprint of each kind of bacteria was obtain from the fluorescence response pattern generated from three kinds of carbon dots. By using linear discrimination analysis (LDA) of the response pattern, the effective discrimination of six bacteria studied was demonstrated. The proposed sensor array approach may pave the way for the development of simple, rapid and effective identification of multiplex bioactive samples.
关键词： bacterial identification,cross-reactive receptors,carbon dots,pattern recognition,sensor array
更新于2025-09-19 17:15:36