Review
Materials Science, Multidisciplinary
Chaoqun Ma, Donghong Peng, Xuanyao Bai, Shuangqiang Liu, Le Luo
Summary: Fiber sensors with features like compact structure, simplicity, electromagnetic interference resistance, and reusability have broad applications in practical engineering. By using thin film technology to create Fabry-Perot (FP) cavities on the fiber, sensitivity to different physical quantities can be achieved, expanding the application range of fiber sensing. This paper provides a systematic introduction to the principle of FP cavity fiber optic sensors based on thin film technology and reviews their applications and development trends in various measurement fields.
Article
Chemistry, Analytical
Hwan Sik Kim, Seung Won Jun, Yeong Hwan Ahn
Summary: We propose a new terahertz Fabry-Perot microcavity biosensor using a porous polytetrafluoroethylene supporting film for improved microorganism detection. The microcavity confines and enhances fields in the middle, where the target microbial film is placed using a PTFE film with a dielectric constant close to unity in the THz range. The resonant frequency shift linearly increases with increasing amount of yeasts, and the sensor's sensitivity is 11.7 GHz/& mu;m when yeast is placed at the cavity's center.
Article
Engineering, Electrical & Electronic
Zhaoxu Zhang, Huaping Gong, Changgui Yu, Kai Ni, Chunliu Zhao
Summary: The humidity characteristics of a fiber optic humidity sensor based on F-P interferometer with HA/PVA composite film were investigated, showing that different mixture ratios of HA/PVA composite affect the humidity sensitive properties of the sensor. The sensor with 1:2 HA/PVA ratio composite film performed the best in relative humidity sensing.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Jie Meng, Jin-Na Ma, Jin Li, Hao Yan, Fanli Meng
Summary: The proposed EFPI fiber humidity probe combines various fiber structure characteristics to achieve high sensitivity and fast response humidity measurement within a specific humidity range. Additionally, it can also simultaneously measure temperature and significantly improve accurate humidity measurement by analyzing and compensating for environmental temperature factors.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Optics
Jian Chen, Yaowu Li, Taoyang Zhang, Xiuling Zha, Xueqing Tang, Xinyang Mu, Peiyan Sun, Ge Song, Shan Cong, Qin Chen, Zhigang Zhao
Summary: This study investigates a reconfigurable photonic structure based on active electrochromic tungsten oxide (WO3), which can switch reversibly between Fano and Fabry-Perot (F-P) resonances by changing the optical indices of the WO3 film through Li+ intercalation/deintercalation.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Xudong Liu, Mingyang Jia, Shuting Fan, Rayko Ivanov Stantchev, Xuequan Chen, Emma Pickwell-Macpherson, Yiwen Sun
Summary: A novel THz modulator combining non-resonant field enhancement and Fabry-Perot resonance structure is proposed and demonstrated, achieving over 95% modulation depth at 14 Fabry-Perot resonant frequencies across 1.4 THz bandwidth. This design outperforms similar THz modulators in terms of modulation depth within the bandwidth.
Article
Materials Science, Ceramics
Gokhan Algun, Namik Akcay, Halim Onur Oztel, Musa Mutlu Can
Summary: This study investigates the effect of strontium (Sr) concentration on the ultrafast humidity sensing performance of Sr doped zinc oxide (SrxZn1-xO) nanostructured thin films. The films were synthesized using the sol gel method with varying Sr concentrations. The results showed that the SrxZn1-xO films had a hexagonal wurtzite structure, and the preferential orientation changed with Sr doping. The films exhibited high sensitivity, stability, and fast response and recovery times, with Sr0.10Zn0.90O being the best sample in terms of humidity sensitivity and response and recovery times. This study highlights the potential of SrxZn1-xO nanostructured thin films for high-performance humidity sensor applications.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Guozhao Wei, Qi Jiang
Summary: A novel approach for fiber optics shape sensing is presented, using a kinematic model based on rotation vector to predict trajectory and reconstruct complex spatial curves for mini-invasive bio-medical devices. The use of compact Fabry-Perot interferometer (FPI) provides high strain sensitivity, low temperature sensitivity, and ultra-low cost for curvature sensing, showing higher sensitivity and lower cross sensitivity compared to fiber Bragg grating.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Kejing Huang, Jiaming Zhang, Wentao Wang, Cong Zhao, Ran Huang, Liping Zhen, Honggang Luo, Jie Liu, Yongliang Zhang, Jinglai Duan
Summary: In this study, high-quality elliptical gold nanowires (NWs) were successfully fabricated using an advanced ion-track template technology with precise control over the geometry engineering. Compared to ordinary NWs, the elliptical NWs exhibited highly polarization-dependent plasmonic responses. Plasmonic Fabry-Perot resonances on finite NWs were measured for the first time.
Article
Optics
Shupeng Yu, Zhiwei Fang, Zhe Wang, Yuan Zhou, Qinfen Huang, Jian Liu, Rongbo Wu, Haisu Zhang, Min Wang, Ya Cheng
Summary: We demonstrate an on-chip single-mode Er3+-doped thin-film lithium niobate (Er:TFLN) laser with a Fabry-Perot resonator based on Sagnac loop reflectors. The fabricated laser has a footprint of 6.5 mm x 1.5 mm, a loaded quality (Q) factor of 1.6 x 10^5, and a free spectral range (FSR) of 63 pm. We achieve single-mode laser operation at 1544 nm wavelength with a maximum output power of 44.7 μW and a slope efficiency of 0.18%.
Article
Materials Science, Multidisciplinary
He Yan, Dandan Sun, Zifan Hou, Guanjun Wang
Summary: A miniature Fabry-Perot fiber-optic sensor with a hydroxyethyl cellulose film coating is developed for high-performance relative humidity detection. The sensor exhibits a testing RH sensitivity of 1.24 nm/%RH in the range of 48%RH to 60%RH, with small hysteresis errors and fast response/recovery times of 1.61 s and 2.1 s, respectively. The sensor's high sensitivity, stability, and simple fabrication process make it promising for practical applications.
Article
Optics
Pei Wang, Chao Jiang, Hailin Chen, Xiping Zhu, Han Zhang, Yuan Wang, Simei Sun, Hong Li
Summary: This study fabricates and verifies a humidity sensor with high sensitivity using humidity sensitive material polyimide (PI) and optical Vernier effect. The sensor consists of two parallel Fabry-Perot interferometers (FPIs), one of which is particularly sensitive to humidity while the other is insensitive. The connection of the two interferometers generates Vernier effect, further amplifying the humidity sensitivity of the sensor.
Article
Engineering, Electrical & Electronic
Xiao Lu, Huaping Gong, Ye Lu, Yiting Liu, Changyu Shen, Chunliu Zhao
Summary: A relative humidity (RH) sensor based on optical fiber Fabry-Perot interferometer (FPI) with open cavity is proposed in this paper. The sensor is manufactured by cutting the fiber capillary (FC) with inclined end and splicing it with the flat end of another FC by overlapping method. Polyvinyl alcohol (PVA) film is coated on the flat end of one FC. Experimental results show that the proposed sensor has a sensitivity of about 0.70 nm/%RH within the range of 35% RH to 85% RH, with a cavity length of 180 μm, hole size of 45 μm, and film thickness of 15 μm. The proposed sensor exhibits high sensitivity, fast response time, and high stability.
OPTICAL FIBER TECHNOLOGY
(2023)
Article
Optics
Chen Zhu, Osamah Alsalman
Summary: Vernier effect-based optical fiber sensors have been used for high-sensitivity measurements of various physical and chemical parameters. This study demonstrates the dynamic sensing capability of a low-cost and intelligent Vernier sensor with the assistance of machine learning-based analysis technique.
Article
Chemistry, Analytical
Joao M. B. Pereira, Paula M. P. Gouvea, Arthur M. B. Braga, Isabel C. S. Carvalho, Antonio C. Bruno
Summary: The optical-mechanical behavior of a Fabry-Perot Interferometer (FPI) composed of a capillary segment and two sections of standard optical fiber was investigated using the finite element method (FEM). The developed FEM model was validated and used to show that the absolute strain on the host substrate is usually smaller than the strain measurement obtained with the sensor. A cavity geometry that can generate the correct absolute strain without requiring previous strain calibration was proposed.
Article
Nanoscience & Nanotechnology
Madhuri Kumari, Boyang Ding, Richard J. Blaikie
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
(2017)
Article
Chemistry, Physical
Jian Qin, Yu-Hui Chen, Boyang Ding, Richard J. Blaikie, Min Qiu
JOURNAL OF PHYSICAL CHEMISTRY C
(2017)
Article
Chemistry, Multidisciplinary
Xingxing Chen, Yu-Hui Chen, Jian Qin, Ding Zhao, Boyang Ding, Richard J. Blaikie, Min Qu
Article
Optics
Levi Bourke, Richard J. Blaikie
Review
Materials Science, Multidisciplinary
Fan Hong, Richard Blaikie
ADVANCED OPTICAL MATERIALS
(2019)
Editorial Material
Multidisciplinary Sciences
Reremoana Theodore, Melinda Webber, Richard Blaikie, Wendy Larner
JOURNAL OF THE ROYAL SOCIETY OF NEW ZEALAND
(2019)
Article
Multidisciplinary Sciences
Yu-Hui Chen, Ronnie R. Tamming, Kai Chen, Zhepeng Zhang, Fengjiang Liu, Yanfeng Zhang, Justin M. Hodgkiss, Richard J. Blaikie, Boyang Ding, Min Qiu
Summary: This study demonstrates a widely tunable bandgap in 2D semiconductors by coherently doping the lattice with plasmonic hot electrons, enabling effective engineering of optical responses for flexibility in photonic and optoelectronic device design and optimization.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Hao Zhang, Fengjiang Liu, Richard J. Blaikie, Boyang Ding, Min Qiu
Summary: This study demonstrates a bifacial absorber that can effectively absorb light in a bifacial and omnidirectional manner across the visible spectrum. The absorber consists of silica-silver core-shell nano-resonator arrays, which take advantage of the hybrid excitation of surface plasmons and whispering gallery modes. The absorption band can be tuned by adjusting the size of the silica core.
APPLIED PHYSICS LETTERS
(2022)
Article
Thermodynamics
Helen Prime, Sam Lowrey, Richard Blaikie, Andrew Sommers, Zhifa Sun, Josselin Juras
Summary: This study experimentally investigates the ice removal effect of topographic micro-structures with gradient-pitch spacing. The findings show that the gradient-pitch surfaces can reduce the adhesion strength of ice to the surface, with the best ice removal effect achieved when force is applied in the direction of the micro-lines.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2022)
Article
Physics, Applied
Conghui Qiu, Hao Zhang, Chengcai Tian, Xuan Jin, Qianglin Song, Liye Xu, Mohsin Ijaz, Richard J. Blaikie, Qingyu Xu
Summary: We report a CsPbBr3-based photodetector engineered from a multilayer Si/Ag islands/CsPbBr3/PMMA system, showing an evidently enhanced photosensitization and breaking the absorption edge of CsPbBr3. The photocurrent contribution from plasmonic hot-electron injection effectively extends the detection limit of the photodetectors, while surface plasmons on nanoscale silver islands improve the light harvesting ability of CsPbBr3 layer. In accordance with their current-voltage (I-V) characteristics, the photodetector with Si/Ag islands/CsPbBr3/PMMA structure exhibits a higher light intensity distribution inside the CsPbBr3 layer than the photodetector with only Ag islands. Ultimately, the plasmonic CsPbBr3-based photodetector presents a >10-fold increase in the photocurrent and a doubling of the operating lifetime.
APPLIED PHYSICS LETTERS
(2023)
Article
Mechanics
Kirill Misiiuk, Richard Blaikie, Andrew Sommers, Sam Lowrey
Summary: Passive gradient motion in nature has been studied in the context of heat exchange and green energy technologies. This work presents a method for examining variable-pitch micro/nanoengineered hierarchical superhydrophobic gradients, which can potentially enhance heat exchanger performance and delay icing on wind turbines. The method combines experimental, numerical, and force analysis approaches and has been validated against numerical calculations.
Article
Mechanics
Kirill Misiiuk, Richard Blaikie, Andrew Sommers, Sam Lowrey
Summary: Passive gradient-driven droplet motion can enhance heat exchanger performance and allow directional transport of microliter size droplets. A theoretical model and its experimental validation for superhydrophobic gradients are discussed in this work. The proposed force balance model provides an analysis of the topography's impact on droplet motion.
Article
Physics, Applied
Mohsin Ijaz, Hao Zhang, Sanutep V. Chan, Robert Holt, Nathaniel J. L. K. Davis, Richard J. Blaikie
Summary: In this work, a plasmonic resonator was coupled with semiconductor quantum dots (QDs) to enhance photoelectrocatalytic water splitting for hydrogen (H-2) production. The plasmonic enhancement in the absorption/emission of QDs was observed using optical spectroscopy. The resonant excitation of QDs has been plasmonically enhanced, contributing to enhanced photoelectrocatalysis. These findings lay the foundation for efficient solar-to-H-2 conversion.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Mohsin Ijaz, Hao Zhang, Liye Xu, Richard J. Blaikie
Summary: In this study, plasmonic resonances on large-area nanoscale silver (Ag) gratings are experimentally investigated using angle-resolved optical absorption spectroscopy and femtosecond transient absorption spectroscopy (TAS). The experimental results measure the plasmon resonances as a function of azimuthal angles and detection angles under different polarizations. TAS reveals the non-radiative decay of plasmon resonances by transferring energy to nearby species, and numerical simulation quantifies the density of plasmonic hot electrons excited in the Ag-gratings.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Levi Bourke, Richard J. Blaikie
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2018)
Article
Chemistry, Analytical
Mengmeng Guo, Na Luo, Yueling Bai, Zhenggang Xue, Qingmin Hu, Jiaqiang Xu
Summary: A porous heterostructure WO3-C/In2O3 was designed and prepared for a miniature H2 sensor, which showed higher response value, lower operating temperature, fast response-recovery speed, and low limit of detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Feng Hu, Hui Hu, Yuting Li, Xiaohui Wang, Xiaowen Shi
Summary: Arsenic contamination in water bodies is a significant health risk. This study developed a chitosan-catechol modified electrode for rapid and accurate detection of trace amounts of arsenic. The modified electrode demonstrated good detection capability and resistance to ionic interference, making it suitable for in situ detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Yantao Zhang, Qian Liu, Tao Tian, Chunhua Xu, Pengli Yang, Lianju Ma, Yi Hou, Hui Zhou, Yongjun Gan
Summary: In this study, a lysosome-targeting buffering fluorogenic probe (Lyso-BFP) was designed and synthesized, demonstrating excellent photostability, pH specificity, and responsiveness to lysosomal acidification in living cells. The performance of Lyso-BFP in pH sensing was attributed to the inhibition of the photo-induced electron transfer process. Lyso-BFP allowed for wash-free imaging and long-term real-time monitoring of lysosome pH changes based on its off-on fluorescence behavior and buffer strategy.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Wei Cai, Wenbo Sun, Jiayue Wang, Xiaokui Huo, Xudong Cao, Xiangge Tian, Xiaochi Ma, Lei Feng
Summary: In this study, a near-infrared fluorescent probe HCBG was developed for imaging of alpha-GLC. HCBG exhibited excellent selectivity and sensitivity towards alpha-GLC in complex bio-samples, and showed good cell permeability for in situ real-time imaging. Through the high-throughput screening system established by HCBG, a natural alpha-GLC inhibitor was successfully isolated and identified. This study provides a novel fluorescence visualization tool for discovering and exploring the biological functions of diabetes-related gut microbiota, and a high-throughput screening approach for alpha-GLC inhibitor.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Trey W. Pittman, Xi Zhang, Chamindie Punyadeera, Charles S. Henry
Summary: Heart failure is a growing epidemic and a significant clinical and public health problem. Researchers have developed a portable and affordable diagnostic device for heart failure that can be used at the point-of-care, providing a valid alternative to current diagnostics approaches.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Anders O. Tjell, Barbara Jud, Roland Schaller-Ammann, Torsten Mayr
Summary: An optical hydrogen peroxide sensor based on catalytic degradation and the detection of produced oxygen is presented. The sensor offers higher resolution and better sensitivity at lower H2O2 concentrations. By removing O2 from the sample solution, a more sensitive O2 sensor can be used for measurement. The sensor has been successfully applied in a flow-through cell to measure H2O2 concentration in different flow rates.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Seong Jae Kim, Ji-hun Jeong, Gaabhin Ryu, Yoon Sick Eom, Sanha Kim
Summary: Surface-enhanced Raman spectroscopy (SERS) is a high-sensitivity, label-free detection method with various analytical applications. Researchers have developed a hydrophobic SERS substrate based on engineered carbon nanotube arrays (CNT-SERS) and studied the role of structural design at both micro and nanoscales. The substrate demonstrated controlled self-enrichment capability and enhanced sensitivity, with a significant increase in the SERS signal. The study also proposed a theoretical model and a concentration strategy inspired by plants for analyte deposition on microarrays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Dan Zhao, Renjun Jiang, Xiaoqiang Liu, Subbiah Alwarappan
Summary: In this study, a novel ternary composite material was constructed by assembling cerium vanadate nanorods on reduced graphene oxide-microcrystalline cellulose nanosheets, and it was used for real-time monitoring of the concentration of superoxide anions in vivo. The ternary composite showed excellent conductivity, large surface area, and abundant active sites, leading to a wider linear range, high sensitivity, low detection limit, and fast response time for superoxide anion detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Tengfei Wang, Liwen Wang, Guang Wu, Dating Tian
Summary: In this study, a covalent organic framework material TaTp-COF with porous and uniform spheres was successfully prepared via hydrothermal reaction, and it was found to significantly enhance the aggregation-induced emission (AIE) of berberine. The unique emission properties of berberine on TaTp-COF were studied and utilized for the sensitive detection of berberine.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Lin Li, Yilei Ding, Lei Xu, Shuoran Chen, Guoliang Dai, Pengju Han, Lixin Lu, Changqing Ye, Yanlin Song
Summary: In this study, a novel TTI based on a ratiometric fluorescent nanosensor is designed, which has the advantages of high accuracy and low cost. Experimental and theoretical investigations confirm its pH responsiveness and demonstrate its good sensitivity and reliability. By monitoring the total volatile basic nitrogen, this TTI can accurately predict food spoilage and can be adaptively modified for different types of food. The TTI based on this nanosensor enables visual monitoring of food quality.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Fangju Chen, Xueting Wang, Wei Chen, Chenwen Shao, Yong Qian
Summary: Lung cancer is the second most common malignant tumor worldwide. Drug resistance in lung cancer leads to treatment failure and recurrence in majority of patients. This study developed a fluorescent prodrug that can be activated in cancer cells to release drugs, and its signal can be tracked by imaging. It shows a unique autophagy-driven ferroptosis effect, indicating its potential for targeting drug-resistant cancer cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Weichao Li, Qiming Yuan, Zhangcheng Xia, Xiaoxue Ma, Lifang He, Ling Jin, Xiangfeng Chu, Kui Zhang
Summary: This study developed a high-performance gas sensor for formaldehyde detection by modifying ZnSnO3 with ZnO QDs and SnO2 QDs. The modified sensor showed improved sensing response and lower working temperature. The presence of ZnO QDs formed rich heterojunctions, increased surface area, and provided oxygen deficiency for formaldehyde sensing reaction, thus enhancing the sensor performance. This research provides an alternative method to enhance the sensing properties of MOS by QDs modification.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Joung-Il Moon, Eun Jung Choi, Younju Joung, Jin-Woo Oh, Sang-Woo Joo, Jaebum Choo
Summary: A novel nanoplasmonic substrate was developed for biomedical applications, which showed strong hot spots for detecting biomarkers at low concentrations. The substrate, called AuNPs@M13, was made by immobilizing 60 nm gold nanoparticles onto the surface of an M13 bacteriophage scaffold. It demonstrated higher sensitivity and lower limit of detection compared to commercially available assays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Ning Li, Ya Zhang, Ying Xu, Xiaofang Liu, Jian Chen, Mei Yang, Changjun Hou, Danqun Huo
Summary: The molecular subtype of breast cancer guides treatment and drug selection. Invasive tests can promote cancer cell metastasis, so the development of high-performance, low-cost diagnostic tools for cancer prognosis is crucial. Liquid biopsy techniques enable noninvasive, real-time, dynamic, multicomponent, quantitative, and long-term observations at the cellular, genetic, and molecular levels. A Cu-Zr metal-organic framework (MOF) nanoenzyme with monatomic Cu attachment has been synthesized and proven to have high catalytic performance. The sensor constructed using this nanoenzyme shows potential for accurate classification of breast cancer serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Jeongmin Kim, Hyemin Kim, Seunghyun Park, Hyeonaug Hong, Yong Jae Kim, Jiyong Lee, Jaeho Kim, Seung-Woo Cho, Wonhyoung Ryu
Summary: This study presents a method to fabricate independently functioning microneedle (MN) electrodes with narrow intervals for high precision electrochemical sensing. The optimized mixture of photocurable polymer and single-wall carbon nanotubes was used to mold single composite MNs, which were then attached to pre-patterned electrodes. Plasma etching and electropolymerization were performed to enhance the electrochemical activity, and Prussian blue and glucose oxidase were electrodeposited on the MNs for glucose detection. The MN electrodes showed good sensitivity and linearity, and the feasibility of glucose detection was demonstrated in an in vivo mouse study.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
