Guangyuan Chen

State Key Laboratory of Transducer Technology

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Jiamin Chen

Chinese Academy of Sciences

Zhenhu Jin

Chinese Academy of Sciences

Junjie Zhang

Chinese Academy of Sciences

Tao Duan

Southwest University of Science and Technology

Hao Zhang

Shenzhen University

Lin Zhu

Ningbo University of Technology

Xuanhao Liang

Southwest University of Science and Technology

Ning Xue

Aerospace Information Research Institute

Jiandong Man

Chinese Academy of Sciences

Chuan Seng Tan

Nanyang Technological University

Cooperative Institutions

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Beijing Institute of Technology

Southwest University of Science and Technology

State Key Laboratory of Transducer Technology

Aerospace Information Research Institute

Zhengzhou University

Tsinghua University

Tianjin University

East China University of Science and Technology

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Vector Exceptional Points with Strong Superchiral Fields

Physical Review Letters (2020)

Tong Wu Weixuan Zhang Huizhen Zhang Saisai Hou Guangyuan Chen

Exceptional points (EPs), branch points of complex energy surfaces at which eigenvalues and eigenvectors coalesce, are ubiquitous in non-Hermitian systems. Many novel properties and applications have been proposed around the EPs. One of the important applications is to enhance the detection sensitivity. However, due to the lack of single-handed superchiral fields, all of the proposed EP-based sensing mechanisms are only useful for the nonchiral discrimination. Here, we propose theoretically and demonstrate experimentally a new type of EP, which is called a radiation vector EP, to fulfill the homogeneous superchiral fields for chiral sensing. This type of EP is realized by suitably tuning the coupling strength and radiation losses for a pair of orthogonal polarization modes in the photonic crystal slab. Based on the unique modal-coupling property at the vector EP, we demonstrate that the uniform superchiral fields can be generated with two beams of lights illuminating the photonic crystal slab from opposite directions. Thus, the designed photonic crystal slab, which supports the vector EP, can be used to perform surface-enhanced chiral detection. Our findings provide a new strategy for ultrasensitive characterization and quantification of molecular chirality, a key aspect for various bioscience and biomedicine applications.

Chirality

Slab

10.1103/physrevlett.124.083901

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Citations (42)

Magnetic Skin for Touchless Human–Computer Interaction to Prevent Healthcare‐Associated Infections

Advanced Sensor Research (2022)

Junjie Zhang Guangyuan Chen Jiamin Chen

Abstract Healthcare‐associated infections are a major problem in hospitals, and regular disinfection methods cannot guarantee that all pathogens are eliminated. Non‐contact human–computer interactions can effectively reduce the risk of contamination by preventing direct contact between medical staff and electronic products. In this study, a new type of flexible and highly malleable magnetic skin composed of a mixture of an elastic matrix and permanent magnetic powder is demonstrated. In addition, the relationship between the magnetic skin properties and the elastic matrix, magnetic powder material, and their ratio is studied. In addition, the application of magnetic skin in gesture recognition (representing discrete gesture input) and magnetic positioning (representing continuous input) is explored to easily achieve touchless human–computer interactions. Both perform well and provide a new way for future human–computer interaction.

Human skin

Matrix (chemical analysis)

10.1002/adsr.202200008

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Citations (9)

An ultrathin, rapidly fabricated, flexible giant magnetoresistive electronic skin

Research Square (Research Square) (2024)

Jiamin Chen Junjie Zhang Zhenhu Jin Guangyuan Chen

Abstract In recent years, there has been a significant increase in the prevalence of electronic wearables, among which flexible magneto-electronic skin has emerged as a key component. This technology is part of the rapidly progressing field of flex-ible wearable electronics, which has opened a new avenue in human perceptual development: magnetic sense. However, magneto-electronic skin is limited due to its low sensitivity and substantial field as a wearable electronic device for sens-ing minor magnetic fields. Additionally, achieving efficient and non-destructive delamination in flexible magnetic sensors remains a significant challenge, hindering their development. In this work, we demonstrate a novel magneto-electronic touchless interactive electronic that utilizes a flexible giant magnetoresistive sensor array. The flexible magnetic sensor array has been developed through an electrochemical delamination process, and the resultant ultra-thin flexible elec-tronic system possesses both ultra-thin and non-destructive characteristics. The flexible magnetic sensor is capable of achieving a bending angle of up to 90 degrees, maintaining its performance integrity even after multiple repetitive bend-ing cycles. Our research also encompasses demonstrations of non-contact interaction and pressure sensing. This re-search is anticipated to significantly contribute to the advancement of high-performance flexible magnetic sensors and catalyze the development of more sophisticated magnetic electronic skins.

Delamination

Electronic component

Wearable Technology

Smart material

Flexible Electronics

Electronic Skin

10.21203/rs.3.rs-3966475/v1

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Co-adsorption performance of iodine and NOX in iodine exhaust gas by NH2-MIL-125

Journal of Hazardous Materials (2024)

Xuanhao Liang Guangyuan Chen Hao Zhang Ling Zhang Tao Duan

Radioactive iodine

10.1016/j.jhazmat.2024.134237

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Citations (6)

Lithium Niobate Electro-Optic Modulation Device without an Overlay Layer Based on Bound States in the Continuum

Micromachines (2024)

Guangyuan Chen Ning Xue Zhi‐mei Qi Weichao Ma Wangzhe Li

Electro-optic modulation devices are essential components in the field of integrated optical chips. High-speed, low-loss electro-optic modulation devices represent a key focus for future developments in integrated optical chip technology, and they have seen significant advancements in both commercial and laboratory settings in recent years. Current electro-optic modulation devices typically employ architectures based on thin-film lithium niobate (TFLN), traveling-wave electrodes, and impedance-matching layers, which still suffer from transmission losses and overall design limitations. In this paper, we demonstrate a lithium niobate electro-optic modulation device based on bound states in the continuum, featuring a non-overlay structure. This device exhibits a transmission loss of approximately 1.3 dB/cm, a modulation bandwidth of up to 9.2 GHz, and a minimum half-wave voltage of only 3.3 V.

Modulation (music)

10.3390/mi15040516

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Correction: A tactile and airflow motion sensor based on flexible double-layer magnetic cilia

Microsystems & Nanoengineering (2024)

Jiandong Man Junjie Zhang Guangyuan Chen Ning Xue Jiamin Chen

[This corrects the article DOI: 10.1038/s41378-022-00478-9.].

Motion sensors

Tactile sensor

Double layer (biology)

10.1038/s41378-024-00710-8

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Co-Adsorption Performance of Iodine and Nox In Iodine Exhaust Gas by Hn2-Mil-125

Xuanhao Liang Guangyuan Chen Hao Zhang Ling Zhang Tao Duan

Ti-based MOFs exhibit ultra-high stability in radioactive waste gases containing nitrogen oxides (NOX) and are effective in capturing radioactive iodine. In this study, NH2-MIL-125 was synthesized via a one-pot solvothermal method and its adsorption performance for iodine was investigated using batch adsorption experiments, the stability of materials was tested by simulating post-processing conditions. The results indicated that NH2-MIL-125 had a maximum iodine adsorption capacity of 1.61 g/g and reached adsorption equilibrium within 60 min, and the adsorption capacity of methyl iodine reached 776.9 mg/g. The material also exhibited excellent stability and iodine adsorption performance in the presence of NOX. After soaking in NO2 for 24 h, its structure remained stable and the adsorption capacity for iodine remained at 231.5 mg/g. The excellent co-adsorption performance of NH2-MIL-125 on iodine and NOX was attributed to the synergistic effects of Ti-OH groups and amino functional groups. These findings provide a reference for the capture of radioactive iodine and also demonstrate the potential of NH2-MIL-125 for spent fuel reprocessing.

10.2139/ssrn.4732177

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Determination of Liquid−Liquid equilibria of ethylene glycol + 1,2-Butanediol + 5-Methyl-2-hexanone/Di-isobutyl ketone ternary systems

The Journal of Chemical Thermodynamics (2022)

Guangyuan Chen Yunhai Shi Rongchun Shen Wei Li Jinghong Zhou

UNIQUAC

Methyl isobutyl ketone

Azeotrope

Ternary numeral system

10.1016/j.jct.2022.106739

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MEMS Fluxgate Sensor Based on Liquid Casting

Micromachines (2023)

Ying Yang Wei Xu Guangyuan Chen Zhenhu Jin Dandan Wang

Compared with electroplating, liquid casting enables the rapid formation of a three-dimensional solenoid coil with a narrower line width and greater thickness, which proves advantageous in enhancing the comprehensive performance of the micro-electromechanical system (MEMS) fluxgate sensor. For this reason, a MEMS fluxgate sensor based on liquid casting with a closed-loop Fe-based amorphous alloy core is proposed. Based on the process parameters of liquid casting, the structure of the MEMS fluxgate sensor was designed. Utilizing MagNet to build the simulation model, the optimal excitation conditions and sensitivity were obtained. According to the simulation model, a highly sensitive MEMS fluxgate sensor based on liquid casting was fabricated. The resulting sensor exhibits a sensitivity of 2847 V/T, a noise of 306 pT/√Hz@1 Hz, a bandwidth of DC-10.5 kHz, and a power consumption of 43.9 mW, which shows high sensitivity and low power consumption compared with other MEMS fluxgates in similar size.

Fluxgate compass

Solenoid

10.3390/mi14122159

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Citations (4)

Recent Progress of Biomimetic Tactile Sensing Technology Based on Magnetic Sensors

Biosensors (2022)

Jiandong Man Guangyuan Chen Jiamin Chen

In the past two decades, biomimetic tactile sensing technology has been a hot spot in academia. It has prospective applications in many fields such as medical treatment, health monitoring, robot tactile feedback, and human–machine interaction. With the rapid development of magnetic sensors, biomimetic tactile sensing technology based on magnetic sensors (which are called magnetic tactile sensors below) has been widely studied in recent years. In order to clarify the development status and application characteristics of magnetic tactile sensors, this paper firstly reviews the magnetic tactile sensors from three aspects: the types of magnetic sensors, the sources of magnetic field, and the structures of sensitive bodies used in magnetic tactile sensors. Secondly, the development of magnetic tactile sensors in four applications of robot precision grasping, texture characterization, flow velocity measurement, and medical treatment is introduced in detail. Finally, this paper analyzes technical difficulties and proposes prospective research directions for magnetic tactile sensors.

10.3390/bios12111054

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Citations (34)