Article
Multidisciplinary Sciences
Xianping Li, Guanghong Zheng, Guozhen Zhang, Jun Yang, Minggang Hu, Jian Li, Ying Li, Hongbo Lu, Zhiping Yin
Summary: This paper presents the design and fabrication process of two highly sensitive sensors working in the terahertz band. The experimental results verify the performance of these sensors under different frequency bands and voltages, and their potential applications in biological and chemical liquid sensing.
Article
Engineering, Electrical & Electronic
Aruna Veeraselvam, Gulam Nabi Alsath Mohammed, Kirubaveni Savarimuthu
Summary: This study presents a highly sensitive THz sensor for detecting biological samples, with a small footprint and high sensitivity. The sensor's sensitivity was estimated using absorption characteristics, and it was evaluated for various materials and biomedical samples, showing an average sensitivity of 1936 GHz/RIU.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Abhinav Bhardwaj, Dheeraj Pratap, Kumar Vaibhav Srivastava, S. Anantha Ramakrishna
Summary: Cylindrical waveguides filled with anisotropic metamaterials enable novel wave propagation phenomena, and variations in the reflection coefficient of the inhomogeneously filled waveguide can be used for detecting liquid purity, with potential for ultra-precise monitoring of permittivity variations of inclusion materials. These findings suggest that inhomogeneous metamaterial waveguides are more sensitive compared to homogeneous ones, with potential applications in biomedical and chemical sensing.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
A. H. M. Iftekharul Ferdous, Benjir Newaz Sathi, Md. Shahareaj Islam, Diponkar Kundu, Twana Mohammed Kak Anwer, Shaik Hasane Ahammad, Md. Amzad Hossain, Mahmoud M. A. Eid, Ahmed Nabih Zaki Rashed
Summary: This paper proposes a spider-web-like cladding photonic crystal fiber with a hexagonal hollow core-based ethanol sensor utilizing terahertz (THz) signal. The sensor achieved a high relative sensitivity of 97.09% and a low confinement loss of 3.68 x 10(-12) dB/m at the optimal frequency, outperforming other studies. It has a large effective area of 6.458 x 10(-08) m(2) and a tiny effective material loss of 0.0051 cm(-1). This study simplifies the manufacture process by using a huge hexagonal core and a set of rectangular air holes in spider-shaped cladding. Future applications for identifying ethanol can greatly benefit from its exceptional sensitivity and guiding qualities.
Article
Electrochemistry
Reza Eslami, Nahid Azizi, Seyed Reza Ghaffarian, Mehrab Mehrvar, Hadis Zarrin
Summary: A new system of arraying two different electrochemical sensors has been designed to achieve selective and sensitive detection of glucose in sweat. The fabricated sensors, including controlled electrodeposition of cobalt/copper and functionalized MWCNT/Fe3O4 electrode, effectively minimize interference from other chemicals in sweat. The arrayed sensors demonstrate high sensitivity to glucose and uric acid, respectively, reducing measurement errors and eliminating the need for an alkaline medium.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Manel Hedhly, Yuye Wang, Shuwen Zeng, Faouzi Ouerghi, Jun Zhou, Georges Humbert
Summary: The study presents a highly sensitive plasmonic biosensor based on a symmetric metal cladding plasmonic waveguide structure for the detection of low concentration small molecules. By precise design and tuning of the guiding layer, ultra-high order modes can be excited, leading to steep phase change and large position shift for the detection of biomolecules that are difficult to detect using traditional SPR techniques.
Article
Materials Science, Multidisciplinary
Tianhua Meng, Guozhong Zhao, Hongmei Liu, Wenyu Li, Caixia Feng, Weidong Hu
Summary: A flexible and highly sensitive 3D terahertz displacement sensor using artificial electromagnetic metamaterials is proposed, which allows for high-resolution displacement measurement with a simple structural design.
FRONTIERS IN MATERIALS
(2022)
Article
Optics
Shilin Ma, Pei Zhang, Xianwu Mi, Heping Zhao
Summary: This paper presents a highly sensitive terahertz sensor based on a graphene metamaterial absorber in the THz region, which has no polarization sensitivity and can be useful in biological diagnosis and environmental monitoring.
OPTICS COMMUNICATIONS
(2022)
Article
Optics
Shilin Ma, Pei Zhang, Xianwu Mi, Heping Zhao
Summary: This paper proposes a highly sensitive terahertz sensor based on a graphene metamaterial absorber in the THz region. The numerical analysis of the sensor using the finite element method agrees well with the analytical results of the coupled mode theory. Moreover, the sensor has no polarization sensitivity. Simulation results show that it has maximum sensitivity, quality factor, and figure of merit for refractive index sensing, making it useful in biological diagnosis and environmental monitoring.
OPTICS COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Qiang Liu, Liang Xing, Zhaoxia Wu, Yongqing Fu, Shuguang Li, Pingsheng Xue, Wai Pang Ng, Qiang Wu, Richard Binns
Summary: An experimental strain sensor based on cascaded Sagnac loops using two PMPCFs has been demonstrated, showing higher sensitivity compared to conventional optical fiber. The Vernier effect is utilized to achieve high resolution, with an average sensitivity of 45.15 pm/mu epsilon and resolution of 0.44 mu epsilon. Comparisons with PMF characteristics were made, concluding the sensor's high sensitivity and great reversibility.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Nanoscience & Nanotechnology
Xiangyang Qu, Ruimin Xie, Zhou Zhou, Tao Zhang, Mengyao Guan, Shiyan Chen, Huaping Wang
Summary: Capacitive fiber pressure sensors have been developed to fill the theoretical research gap in the field, providing a reference for the design and development of such sensors. The use of the wet spinning process has allowed for the establishment of a fiber pressure-sensing platform, addressing the specific challenges faced in the design of fiber sensors. The scalability and integration capabilities of 1D electronics have also been leveraged to demonstrate the potential application of multipoint sensors in various fields.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Spectroscopy
Jie Chen, Fangrong Hu, Shangjun Lin, Zihang Song, Zhitao Duan, Longhui Zhang, Mingzhu Jiang
Summary: In this research, a method for highly sensitive detection of miRNA-21 using a THz metamaterial sensor and HCR technology was proposed. By combining a capture hairpin probe with gold nanoparticles and amplifying the signal through HCR technology, low-concentration miRNA detection was successfully achieved. The results showed good specificity and sensitivity of the method, paving the way for low-cost, easy-to-operate, and marker-free miRNA detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Nanoscience & Nanotechnology
Jiaojian Shi, Daehan Yoo, Ferran Vidal-Codina, Chan-Wook Baik, Kyung-Sang Cho, Ngoc-Cuong Nguyen, Hendrik Utzat, Jinchi Han, Aaron M. Lindenberg, Vladimir Bulovic, Moungi G. Bawendi, Jaime Peraire, Sang-Hyun Oh, Keith A. Nelson
Summary: Researchers have developed a room-temperature terahertz camera and polarimeter based on a quantum-dot-enhanced THz-to-visible upconversion mechanism. The camera offers broadband and fast responses and can detect THz pulses with peak fields as low as 10 kV cm(-1).
NATURE NANOTECHNOLOGY
(2022)
Article
Optics
Ming Zhang, Qian Cheng, Baozhu Wang, Lin Yang, Jianchao Wang, Ruihong Wu, Weimin Hou
Summary: In this paper, a polarization-independent and multi-resonances metasurface was designed for high-performance THz sensing. The metasurface exhibited three polarization-independent and strong resonance peaks, all showing high sensitivity to the ambient refractive index. The results of this study lay the theoretical and technical foundation for the design of high-sensitivity terahertz sensing.
OPTICS COMMUNICATIONS
(2022)
Article
Biochemical Research Methods
Yapeng Yuan, Doudou Ma, Xun Liu, Tao Tang, Ming Li, Yang Yang, Yaxiaer Yalikun, Yo Tanaka
Summary: The micro-cantilever-based sensor platform is a promising technique for sensing physical, chemical, and biological detection due to its portability, small size, label-free characteristics, and compatibility with lab-on-a-chip devices. However, traditional micro-cantilever methods have limitations in fabrication, manipulation, detection, and sensitivity. This research proposes an ultrathin glass cantilever integrated with a strain gauge sensor, which is easier to fabricate, has better physical and chemical properties, shows a high sensitivity, and supports real-time observation during measurement.
