Article
Chemistry, Physical
Xin Zhang, Guan Wang, Jia Liu, Shiyi Zuo, Meichen Li, Shuang Yang, Yang Jia, Yachen Gao
Summary: This study proposes a switchable and tunable terahertz metasurface polarization converter based on graphene, which can achieve different polarization conversion effects within a specific frequency range by changing the properties of the graphene layer. It also demonstrates potential applications in biosensing.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Optics
Yu Wang, Yue Wang, Qingyan Li, Yu Zhang, Shiyu Yan, Chunhui Wang
Summary: This paper presents an all-solid-state, electrically tunable, and reflective graphene metasurface array that can generate specific phase or continuous scanning in the terahertz band. By adjusting the Fermi levels, an electrically tunable terahertz phased array can be achieved with high reflectivity and resolution.
Article
Physics, Multidisciplinary
Yafeng Lu, Chen Wang, Shiqiang Zhao, Yongzheng Wen
Summary: Graphene is proposed as a platform for THz devices, and a graphene-based THz metasurface using cut-wire arrays is introduced for magnetic manipulation of THz waves. This structure allows efficient tuning of the metasurface response, making it suitable for applications such as compact THz modulators and magnetic field sensors.
FRONTIERS IN PHYSICS
(2021)
Article
Optics
Yonggang Zhang, Fu Qiu, Lanju Liang, Haiyun Yao, Xin Yan, Wenjia Liu, Chengcheng Huang, Jianquan Yao
Summary: This letter presents a fabricated Dirac point modulator of a graphene-based terahertz electromagnetically induced transparency (EIT)-like metasurface. The modulation is achieved through three stimulus modes: optical pump, bias voltage, and optical pump-bias voltage combination. The position of the Dirac point can be evaluated approximately by analyzing the transmission spectrum fluctuation. The findings demonstrate a method for designing ultrasensitive terahertz modulation devices.
Article
Physics, Condensed Matter
Tao Chen, Weijie Jiang, Xianhua Yin
Summary: This paper proposes a dual-band tunable absorber with a graphene-dielectric-metal structure as a sensor in the terahertz region, which achieves resonance frequency adjustment by tuning the chemical potential of graphene and exhibits polarization and angle insensitivity. Simulation results demonstrate the structure's maximum sensitivity, Q factor, and figure-of-merit, indicating promising applications in biomedical diagnosis and environmental monitoring.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Optics
Shuvajit Roy, Kapil Debnath
Summary: In this paper, a new method of tuning graphene-based terahertz (THz) metasurfaces is proposed using the electromechanical method. By supporting a free-standing graphene layer on an oxide grating on a gold substrate, the resonance wavelength of the metasurface can be shifted by causing a deflection in the free-standing regions of the graphene layer through the potential difference between the graphene layer and the gold substrate. Numerical simulation shows continuous tunability of the resonant frequency over a frequency range of 0.5 THz for an applied external potential of only 20 V. The application of the proposed metasurface in THz modulation is also demonstrated.
OPTICS COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Guibin Li, Guocui Wang, Yan Zhang, Jingling Shen, Bo Zhang
Summary: The combination of graphene and perovskite has attracted a lot of attention due to its excellent photoelectric properties for manipulating light-matter interactions. The integration of graphene and perovskite with a metasurface is proposed to enhance the metasurface device's performance. In this study, a tunable terahertz graphene-perovskite metasurface is demonstrated, showing significant reduction in transmission and manipulation of the Fano resonance mode under 780 nm laser excitation. Experimental results are verified using finite-difference time-domain simulation.
NANOSCALE ADVANCES
(2023)
Article
Optics
Yuyu Li, Roberto Paiella
Summary: Graphene plasmonics is used to extend metasurface technology to the terahertz spectral region, providing active tunability. A comprehensive design platform is introduced for the development of THz metasurfaces capable of complex wavefront manipulation functionalities. This approach is compatible with graphene grown by chemical vapor deposition and shows promise for a wide range of THz technologies.
Article
Physics, Applied
Chenglong Zheng, Jie Li, Silei Wang, Jitao Li, Mengyao Li, Hongliang Zhao, Xuanruo Hao, Huaping Zang, Yating Zhang, Jianquan Yao
Summary: This study presents all-silicon chiral metasurfaces for highly efficient circular polarization differential transmittance in the terahertz band. In addition to characterizing the static chiral properties, dynamic chiral behaviors are also investigated using optical pumping. The application of the chiral metasurface in polarization multiplexed near-field image display is also demonstrated.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Kai Sun, Jining Li, Liang Ge, Kai Zhong, Yuye Wang, Degang Xu, Xiang Yang, Weiling Fu, Jianquan Yao
Summary: Graphene, a two-dimensional material with unique physical and chemical properties, has attracted attention in biosensing and medical detection due to its excellent biocompatibility. This paper proposes and demonstrates a metal-graphene hybrid metasurface for high-sensitive nortriptyline sensing, achieving enhanced sensitivity through modulation of graphene's conductivity. The metasurface sensor offers advantages such as high sensitivity, fast detection speed, label-free, and steady properties.
Article
Multidisciplinary Sciences
Yali Zeng, Qilin Duan, Jinying Xu, Zhilin Yang, Huanyang Chen, Yineng Liu
Summary: This study proposes a single-layer twisted graphene-patterned metasurface with tilted elliptical hole arrays and theoretically reveals its tunable circular conversion dichroism (CCD) in the terahertz (THz) region. The unit cell of the metasurface is achiral, and by changing the in-plane orientation of holes for structural 2D chirality, a tunable CCD can be achieved at normal incidence. The reflection phase can be considered as an intuitive method to show the metasurface's anisotropy, and active CCD can be achieved based on the tunability of graphene.
Article
Materials Science, Multidisciplinary
Yuxin Wang, Rongcao Yang, Yijia Zhao, Zhaohua Li, Wenmei Zhang, Jinping Tian
Summary: A tunable bifunctional metasurface (TBM) incorporating two layers of independently controllable hollow-patterned graphene is proposed for wideband linear polarization conversion and dual-band absorption. The experimental results demonstrate the excellent performance of the TBM in different operating modes, suggesting its potential for designing terahertz devices.
Article
Optics
Pooja Agarwal, Kamal Kishor, Ravindra Kumar Sinha
Summary: In this work, an ultrasensitive dual-band metasurface sensor is reported, which shows dual-band resonance behavior at 1.911 THz and 1.985 THz. The sensor has high sensitivity and excellent parameters, making it potentially useful in the THz region for various applications.
OPTICS COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Hui Xu, Ming Li, Zhiquan Chen, Longhui He, Yulan Dong, Xuelei Li, Xiaojing Wang, Guozheng Nie, Zhihui He, Biao Zeng
Summary: This research focuses on the properties of graphene surface plasmons and their potential applications. It investigates the plasma induced transparency, absorption, and slow light effects. The study designs a graphene-based metamaterial structure that achieves dual plasma induced transparency and explores the physical mechanism behind it. This coupling system has important research significance for optical switches, optical loops, and slow light devices.
Article
Optics
Pei-Jung Wu, Wei-Cheng Tsai, Chan-Shan Yang
Summary: In this study, an electrically tunable multi-band terahertz (THz) metamaterial filter based on graphene and multiple-square-loop structures was designed. The structure consists of multiple metal square loops of different sizes, which correspond to different THz frequencies, achieving the expected efficacy of a multi-band wave filter. By sweeping external voltages, the capability of the high-sensitivity THz filter can be modulated from single-band to multi-band filtering by changing graphene's Fermi levels. This hybrid THz wave filter study shows promise for the development of selecting channels in THz and 6G communications.
Article
Optics
Dong Bao, DengXin Hua, Hao Qi, Jun Wang
Summary: This paper proposes a method for the inversion of salinity using lidar data, utilizing a back propagation neural network. Three neural network models were established, and the one with 5 input parameters achieved the highest inversion precision. The role played by different influencing factors in the salinity inversion was evaluated, with the Raman spectra and the Brillouin frequency shift identified as the main factors. The experimental results validated the accuracy of the established models. The research provides valuable data support for global climates and ecosystems.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Physics, Condensed Matter
Chunpeng Li, Xiaodong Gao, Xiaodan Wang, Xiaoming Dong, Xionghui Zeng, Jiafan Chen, Chuang Wang, Luhua Wang, Jingjing Chen, Sida Wei, Ke Xu
Summary: This study characterizes an AlN film grown on a metal-organic chemical vapor deposition (MOCVD) AlN template via high-temperature hydride vapor phase epitaxy (HVPE). High-resolution X-ray diffraction reveals improved crystal quality and atomic force microscopy shows decreased roughness compared to the template. Cathodoluminescence spectra indicate oxygen atoms as the main impurities in both the epitaxial layer and the template. Raman spectroscopy and geometric phase analysis demonstrate that HVPE AlN samples maintain internal compressive stress, which is crucial in preventing film cracking. Transmission electron microscope characterization reveals that most dislocations at the interface originate from the MOCVD AlN template, incline during subsequent growth, react with each other, and eventually annihilate. The mechanism of dislocation bending and reduction is also elucidated.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Behavioral Sciences
Xiaofei Zhang, Tongxin Li, Conghui Wang, Tian Tian, Haizhu Pang, Jisong Pang, Chen Su, Xiaomei Shi, Jiangong Li, Lina Ren, Jing Wang, Lulu Li, Yanyan Ma, Shen Li, Lili Wang
Summary: This study proposes to use facial images and deep learning algorithm to recognize patients with schizophrenia and investigate objective differences in facial expressions between patients and healthy controls. The trained convolutional neural network achieved an overall accuracy of 95.18% for classification, and statistical analyses demonstrated significant objective differences in facial expressions between the two groups.
BRAIN AND BEHAVIOR
(2023)
Article
Chemistry, Physical
Lijia Xie, Piaopiao Wu, Qiong Lei, Chong Xu, Weiya Huang, Xunjun Chen, Kai Yang, Hua He
Summary: TiO2 nanoparticles were synthesized and combined with Bi2O3 nanosheets to form a series of 0D/2D TiO2 NPs/Bi2O3 nanosheet heterojunctions. The optimized catalyst TB-3 exhibited the best photocatalytic degradation of tetracycline hydrochloride and the highest hydrogen evolution compared to other catalysts.
Article
Neurosciences
Wei Chen, Xiao-Ning Zhang, Yang-Shuai Su, Xiao-Yu Wang, Heng-Cong Li, Yi-Han Liu, Hong-Ye Wan, Zheng-Yang Qu, Xiang-Hong Jing, Wei He
Summary: Recent research has focused on using neuronal stimulation to locally control articular inflammation and avoid systemic side effects. Electroacupuncture (EA) has been proven useful for suppressing inflammation and reducing pain in knee osteoarthritis (KOA) patients, but its mechanism remains unclear.
FRONTIERS IN MOLECULAR NEUROSCIENCE
(2023)
Article
Pharmacology & Pharmacy
Guoliang Deng, Fan Yang, Ning Sun, Danhong Liang, Anfen Cen, Chen Zhang, Suiqin Ni
Summary: This study aimed to determine the plasma exposure to meropenem in patients with chronic kidney disease (CKD) and to investigate optimal dosing regimens. A PBPK model was established and successfully predicted the pharmacokinetics of meropenem in different populations. The dosing regimen of meropenem needs to be adjusted according to the renal function of CKD patients. For patients receiving hemodialysis, pharmacodynamic evaluations were performed for different periods to determine optimal dosing regimens.
FRONTIERS IN PHARMACOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Xiaoyao Mo, Guangxu Xu, Xiaochan Kang, Hang Yin, Xiaochen Cui, Yuling Zhao, Jianmin Zhang, Jie Tang, Fengyun Wang
Summary: In this work, ZnFe2O4/reduced graphene oxide (rGO) nanocomposites were successfully prepared using a facile microwave hydrothermal process. The influence of rGO content on the morphology, structure, and electrochemical performance of the ZnFe2O4/rGO nanocomposites was systematically investigated. The as-prepared ZnFe2O4/rGO electrode with 44.3 wt.% rGO content exhibited a high specific capacitance of 628 F g(-1) and long cycle life of 89% retention over 2500 cycles at 1 A g(-1). This work provides a new process for synthesizing binary transition metal oxide and developing a new strategy for realizing high-performance composites for supercapacitor electrodes.
Review
Nanoscience & Nanotechnology
Haotian Hao, Lingpeng Yan, Mixue Wang, Yanli Cao, Jintao He, Yongzhen Yang
Summary: The explosive growth of digital communication has led to the development of advanced memory and computing devices in the era of Big Data and artificial intelligence. Memristors, particularly those utilizing carbon dots (CDs) as functional layer materials, show great promise for in-memory computing and artificial synapses. CDs provide satisfactory modulation effects on memristance, making them a potential replacement for silicon-based materials. The combination of CDs and matrix materials can enable multimode sensation memristors for interactive intelligent systems. This review highlights the role of CDs in memristors, discusses their modulation effects, and explores potential applications and challenges.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jingshu Meng, Xiao Yang, Jing Huang, Zhan Tuo, Yan Hu, Zhiyun Liao, Yu Tian, Suke Deng, Yue Deng, Zhiyuan Zhou, Jonathan F. Lovell, Honglin Jin, Yang Liu, Kunyu Yang
Summary: This study presents an injectable hydrogel drug delivery system based on chitosan hydrochloride and oxidized dextran (CH-OD) for loading sulfasalazine (SSZ) to effectively treat malignant ascites in advanced hepatocellular carcinoma (HCC). The CH-OD-SSZ hydrogel exhibits enhanced cytotoxicity and immunogenic ferroptosis compared to free SSZ. In preclinical models, the intraperitoneal administration of CH-OD-SSZ hydrogel significantly suppresses tumor progression, repolarizes macrophages, activates dendritic cells, and achieves ascites regression when combined with anti-PD-1 immunotherapy.
Article
Chemistry, Multidisciplinary
Honghong Ma, Zhiying Yang, Shenghai Pu, Xingwang Ma
Summary: Drip irrigation under plastic mulch in Xinjiang, Northwest China leads to periodic drying-rewetting cycles. The effect of different wet and dry alternation types on soil inorganic nitrogen transformation is not clear. Studying these issues is important for fertilization and irrigation systems formulation and reducing non-point source pollution.
APPLIED SCIENCES-BASEL
(2023)
Review
Immunology
Ru-Yue Chen, Yun Zhu, Yun-Yan Shen, Qin-Ying Xu, Han-Yun Tang, Ning-Xun Cui, Lu Jiang, Xiao-Mei Dai, Wei-Qing Chen, Qiang Lin, Xiao-Zhong Li
Summary: Programmed cell death 1 receptor (PD-1) and its ligands play a crucial role in immune tolerance, immune homeostasis, and immunosuppression. The PD-1 pathway has been implicated in various diseases, including cancer and autoimmune diseases, and PD-1 blockades have been approved for cancer treatment. This comprehensive review focuses on the structure and expression of PD-1, PD-L1, and PD-L2, the diverse biological functions of PD-1 signaling in health and immune-related diseases, and the immune-related adverse events associated with PD-1 and PD-L1 inhibitors.
FRONTIERS IN IMMUNOLOGY
(2023)
Review
Immunology
Yinlan Wu, Yanhong Li, Yubin Luo, Yu Zhou, Xiuping Liang, Lu Cheng, Tong Wu, Ji Wen, Chunyu Tan, Yi Liu
Summary: This paper reviews the application of proteomics in different subtypes of connective tissue disease-related interstitial lung disease (CTD-ILD), discussing the role of differentially expressed proteins in the development of pulmonary fibrosis and their potential clinical applications.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Junwen Li, Heping Li, Zhuang Wang, Zhiyao Zhang, Shangjian Zhang, Yong Liu
Summary: The first experimental observation of soliton explosions triggered by vector dissipative soliton collisions in a polarization-multiplexed ultrafast fiber laser is reported. Spectral dynamics and time-domain measurements reveal the characteristics of collision-induced soliton explosions. Numerical simulations provide further insights into the physical mechanism.
RESULTS IN PHYSICS
(2023)
Article
Environmental Sciences
Xinqi Li, Kai Zhong, Xianzhong Zhang, Tong Wu, Yijian Zhang, Yu Wang, Shijie Li, Zhaoai Yan, Degang Xu, Jianquan Yao
Summary: This study evaluated the uncertainty of atmospheric temperature measurement using the Guide to the Expression of Uncertainty in Measurement (GUM) and the Monte Carlo Method (MCM). The results show that the GUM method is reliable when discarding data in the range of 10-15 km below the reference altitude. The GUM method is recommended for evaluating the atmospheric temperature uncertainty of Rayleigh lidar detection in terms of operability, reliability, and calculation efficiency.
Article
Microbiology
Guangping Fu, Guanju Ma, Shujie Dou, Qian Wang, Lihong Fu, Xiaojing Zhang, Chaolong Lu, Bin Cong, Shujin Li
Summary: Based on 16s rRNA V3-V4 region sequencing of 80 saliva samples, the study found that microbial markers have potential value in personal identification of monozygotic twins. Among the 12 identification models, the ASV-Jaccard distance models performed the best for short interval samples.
FRONTIERS IN MICROBIOLOGY
(2023)