科研趋势
历年科研结果应用趋势一目了然
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Tunability of metamaterial compact band-stop filters using YIG substrate
摘要： In this paper, the design of a tunable and compact metamaterial microstrip band-stop filter is proposed. The device is designed to operate in the X band, it is based on a metamaterial pattern (single-turn square planar resonator) implemented on a ferrite substrate. The study focuses on the metamaterial band-stop filter and on the way to tune its frequency properties. For this reason, the magnetic material is a perfect solution, using YIG (Yttrium Iron Garnet) substrates. As a result, the central frequency of the filter can be tuned by varying the magnetic bias applied to the YIG substrate. A tunability up to 10.81% is obtained. The size of the proposed filter is electrically reduced to 3.7 mm2.
关键词： X band,YIG,Band-stop filter,frequency tunability,metamaterial,magnetic materials更新于2026-01-10 06:59:58
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Temperature measurement using infrared thermometry within semi-transparent media
摘要： Infrared thermometry is a widely used technique for contactless temperature measurement, which is often conducted through semi-transparent media. In the present work, influences on the measurement results stemming from semi-transparent media and from the optical characteristics of the measurement setup are discussed. Results of two experimental setups, containing low, medium, and high transmission media are presented and compared to calculated data using a one-dimensional analytical approach and a three-dimensional ray-tracing algorithm. It is shown through modeling and experiments that the surroundings and, in particular, the (semi)transparent materials within the optical path are critical for accurate temperature measurements.
关键词： ray tracing,Infrared thermometry,transmission更新于2026-01-10 06:59:57
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Applications of propagation of long-wave with dissipation and dispersion in nonlinear media via solitary wave solutions of generalized Kadomtsev–Petviashvili modified equal width dynamical equation
摘要： In this research work, we constructed the solitary wave solutions of generalized Kadomtsev–Petviashvili modified equal width (KP-MEW) equation with the help of new technique which is modification form of extended auxiliary equation mapping method. The generalized KP-MEW equation is the nonlinear PDEs which described the propagation of long-wave with dissipation and dispersion in nonlinear media. As a result, families of solitary wave solutions are obtained in different form of solitons, bright–dark solitons and traveling wave solutions. The physical structure of these new solutions is shown graphically in two and three dimensions with the aid of computer software Mathematica. These obtained new solutions show the power and effectiveness of this new method. We can also solve other nonlinear system of PDEs which are involved in mathematical physics and many other branches of physical sciences with the help of this new method.
关键词： Solitary wave solutions,Modified extended auxiliary equation mapping method,Generalized KP-MEW equation,Bright and dark solitons更新于2026-01-10 06:59:55
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On-chip immuno-agglutination assay based on a dynamic magnetic bead clump and a sheath-less flow cytometry
摘要： Immunoagglutination assay is a promising approach for the detection of waterborne analytes like virus, cells, proteins with its advantages such as a smaller amount of reagents and easier operation. This paper presents a microfluidic agglutination assay on which all the assay processes including analyte capture, agglutination, and detection are performed. The chip integrates an on-chip pump for sample loading, a dynamic magnetic bead (MB) clump for analyte capture and agglutination, and a sheath-less flow cytometry for particle detection, sizing, and counting. The chip is tested with streptavidin-coated MBs and biotinylated bovine serum albumin as a model assay, which realizes a limit of detection (LOD) of 1 pM. Then, an antigen/antibody assay using rabbit IgG and goat anti-rabbit IgG coated MBs is tested and a LOD of 5.5 pM is achieved. At last, human ferritin in 10% fetal bovine serum is tested with Ab-functionalized MBs and the detection achieves a LOD of 8.5 pM. The whole procedure takes only 10 min in total.
更新于2026-01-10 06:59:54
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Optical Dyes to Monitor Tension and Growth in Model Membranes
摘要：
更新于2026-01-10 06:59:52
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Short-focus nematic liquid crystal microlens array with a dielectric layer
摘要： A short-focus microlens array using dielectric layer and inhomogeneous electric field over a homogeneous nematic liquid crystal (LC) layer is proposed. The top substrate has a planar indium tin oxide (ITO) electrode which is coated on the inner surface. The bottom substrate has strip ITO electrodes which are embedded in the dielectric layers. The inhomogeneous electric field generates a required gradient refractive index profile within the LC layer which, in turn, causes the focusing effect. Due to the thinner LC layer (15 μm), the spherical aberration should be negligible. Moreover, the fabrication process of the proposed microlens array can be easily carried out because of the layer-by-layer configuration. The simulation results show that the focal length of the LC microlens can be continuously tuned from infinity to 0.988 mm with the change of applied voltage.
关键词： liquid crystal,Short-focus,dielectric layer,microlens array更新于2026-01-10 06:59:52
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Utilising near-infrared hyperspectral imaging to detect low-level peanut powder contamination of whole wheat flour
摘要： Near-infrared hyperspectral imaging (HSI) was used for detecting low levels of peanut powder contamination in whole wheat flour, with concentrations of 0.01e10% (w/w). Two types of whole wheat flours, i.e. spring wheat flour (WFS) and winter wheat flour (WFW), were used. Minimum noise fraction combined with n-Dimensional visualiser tool was applied on light intensity calibrated hyperspectral images for preliminary discrimination. Competitive adaptive reweighted sampling (CARS) was applied for optimal wavelength selection. Partial least squares regression (PLSR) models with standard normal variate followed by SavitzkyeGolay first derivatives had the best performance, with coefficients of determination of prediction (R2 p) of 0.993 and 0.991, and root mean square error of prediction (RMSEP) of 0.251% and 0.285%, respectively for contaminated WFS and WFW samples. Prediction maps based on PLSR models permitted visualising spatial variations in the concentration of peanut contamination. The results indicated that near-infrared HSI has the potential to detect low-level peanut contamination in whole wheat flour.
关键词： Peanut powder,Near-infrared hyperspectral imaging,Visualisation,Whole wheat flour,Low-level contamination更新于2026-01-10 06:59:51
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Large plasmonic field enhancement on hydrogen-absorbing transition metals at lower frequencies: Implications for hydrogen storage, sensing, and nuclear fusion
摘要： The plasmonic enhancement of electromagnetic field energy density around planar surfaces of hydrogen-absorbing transition metals, Pd, Ti, and Ni, has been quantitatively investigated, to explore the use of plasmonics in the forthcoming hydrogen economy. We have observed that a large degree of energy focusing, with the enhancement factor over several hundreds, is available for these transition metals in the microwave region, even surpassing the enhancement for noble metals. This finding could potentially lead to technological progress in various hydrogen-related energy applications including hydrogen storage, sensing, and nuclear fusion.
更新于2026-01-10 06:59:50
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Broadband complex permittivity measurements of nematic liquid crystals based on cavity perturbation method
摘要： Liquid crystals (LCs) have already been widely used in reconfigurable microwave devices as an excellent phase change material for their electric tunable dielectric properties. An accurate value of complex permittivity on a given LCs is the most important parameter on designing microwave devices. In this paper, a novel method is proposed to realise a broadband permittivity measurement. On the basis of the theory of perturbation, it consisted of a double-ridge waveguide cavity and the given vector network analyser. In order to have a broadband measuring range and uniformly distribute operating frequency points, multi-mode double-ridged waveguide cavity is introduced to resonate at 11 operating modes (TE1;0;2n(cid:1)1,n = 1,2, …, 11). Meanwhile, to suppress the undesired-modes effectively, several non-radiating slots are applied to keep the operating modes easily recognisable, so as to complete the broadband complex permittivity measurement in 5–40 GHz using only one cavity. Besides, another feature of this method is that the total-required sample is only about 0.02 mL because the sample loading area in the double-ridged waveguide cavity is perfectly designed very small. Therefore, several NLCs are measured, including a certain commercial mixture MM (Merck), and M1~ M7, as developed LC mixtures with large dielectric anisotropy and low microwave losses.
关键词： Liquid crystals,complex permittivity,perturbation method,broadband,anisotropy,multi-mode更新于2026-01-10 06:59:49
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Application of various optical and electrochemical aptasensors for detection of human prostate specific antigen: A review
摘要： Early stage detection of prostate cancer, one of the main causes of mortality among men, is of great importance for better treatment of the patients. Prostate specific antigen (PSA) is a glycoprotein which has been considered as the most potential serological biomarker for the detection of prostate cancer. Among the various techniques employed for PSA detection, aptamer-based biosensors (aptasensors) have achieved notable attention because of their unique features and great potentials as diagnostic tools. A variety of strategies such as integration of nanomaterials (NMs) into the structure of aptasensors have also been applied for enhancing the sensitivity of PSA detection. This article reviews recent advances in various optical and electrochemical aptasensors used for PSA detection.
关键词： Biosensor,Aptasensor,Cancer biomarker,Aptamer,PSA更新于2026-01-10 06:59:48
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型号：ZEISS LSM 990 Spectral Multiplex
智能分析： ZEISS LSM 990 Spectral Multiplex是一款定位于高端科研机构的光谱成像系统，具有卓越的光谱分辨率和自动化功能，适用于复杂的生物、医学及材料科学实验。其高效的荧光标签分离能力和多功能自动化设计为用户提供了强大的实验支持。然而，高昂的价格和一定的学习曲线可能对中小型实验室构成挑战。总体而言，这是一款性能优越、适应性强的高端实验设备。获取实验方案 -
智能分析： Evolution 300紫外可见分光光度计是一款性能卓越的实验室光谱仪，适用于生命科学、材料科学、制药和光谱分析等多种应用领域。其高精度光学设计和宽广的波长范围使其在精密实验中表现出色，同时快速启动和智能附件提升了使用便利性。然而，其设备重量和技术维护需求可能对使用环境有一定限制。总体而言，这是一款可靠且高效的光谱分析工具，适合高要求的实验室应用。获取实验方案 -
智能分析： Nicolet iS50 FTIR光谱仪是一款高性能的多功能材料分析工作站，适用于材料科学、制药、化学研究等领域。其多种模块化扩展和高光学性能使其在复杂应用中表现出色，但较高的重量和潜在的高成本可能对某些用户造成限制。总体而言，该产品具备强大的性能和灵活性，是高端光谱分析的理想选择。获取实验方案 -
智能分析： Nicolet iS10傅立叶变换红外光谱仪是一款高性能、多功能的红外光谱分析仪，适用于材料验证、质量控制、故障分析等多种应用场景。其高光谱分辨率、优异的信噪比以及广泛的样品兼容性使其成为实验室分析的不二之选。同时，自动化功能和卓越的数据安全性增加了用户的便利性和可靠性。然而，其高成本和一定的学习曲线可能对部分用户产生影响。综合来看，这是一款性能优越且可靠的光谱分析设备，非常适合对精度和效率要求较高的用户。获取实验方案 -
智能分析： Cary 50分光光度计是一款由安捷伦科技公司推出的高性能光谱分析仪器，专注于实验室光谱分析、化学研究、生物领域等多种应用。其高精度检测能力、紧凑设计以及低功耗特性使其成为实验室的理想选择。然而，产品重量较重以及某些接口适配问题可能对运输和安装造成一定挑战。总体来说，Cary 50是一款性能优异、兼容性较强的分光光度计，适合对精确光谱分析有高需求的用户使用。获取实验方案 -
智能分析： Lambda 25紫外可见分光光度计是PerkinElmer公司推出的一款高性能光谱分析仪器，特别适合对精度和稳定性要求较高的实验室应用。其采用双光束光学设计和高品质光学元件，具备良好的波长准确度、光度重复性和光学稳定性，适用于化学、生物医学、环境监测等领域。尽管其重量较大且带宽固定，但这些缺点可被其卓越的性能所弥补。总体而言，Lambda 25 是一款功能强大且可靠的光谱仪器，非常适合需要高精度分析的用户。获取实验方案