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Guo W, Yu Y, Xin C, Jin G. Comparative study of optical fiber immunosensors based on traditional antibody or nanobody for detecting HER2. Talanta 2024; 277:126317. [PMID: 38810383 DOI: 10.1016/j.talanta.2024.126317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 05/18/2024] [Accepted: 05/23/2024] [Indexed: 05/31/2024]
Abstract
In this study, we present a novel biomarker detection platform employing a modified S-tapered fiber coated with gold nanoparticle/graphene oxide (GNP/GO) for quantifying human epidermal growth factor receptor-2 (HER2) concentrations, using antibodies as sensing elements. The fabrication of this device involves implementing an in-situ layer-by-layer technique coupled with a chemical adsorption step to achieve the self-assembly of GNP, GO, and antibodies on the STF surface. The detection mechanism relies on monitoring the refractive index changes induced by the adsorption of HER2 onto the immobilized antibodies. For comparative analysis, both monoclonal antibody (mAb) and the novel nanobody (Nb) were employed in constructing the STF immunosensor, referred to as the mAb immunosensor and Nb immunosensor, respectively. Spectral analysis results highlight that the Nb immunosensor exhibits twice the sensitivity of the mAb immunosensor. This enhanced sensitivity is attributed to the small size, high antigen affinity, strong specificity, and structural stability of Nb. The Nb immunosensor demonstrated an impressive detection limit of 0.001 nM for HER2, surpassing the detection limit of the mAb immunosensor. These findings underscore the potential of the proposed Nb immunosensor as a promising and sensitive tool for HER2 detection, contributing to the diagnosis and prognosis of breast cancer. Furthermore, the simplicity of production and excellent optical performance position the Nb immunosensor as a prospective real-time biosensor with minimal cytotoxicity.
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Affiliation(s)
- Wanmei Guo
- Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology, Changchun, 130022, China
| | - Yongsen Yu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - Chao Xin
- Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology, Changchun, 130022, China
| | - Guangyong Jin
- Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology, Changchun, 130022, China.
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Anbuselvam B, Gunasekaran BM, Srinivasan S, Ezhilan M, Rajagopal V, Nesakumar N. Wearable biosensors in cardiovascular disease. Clin Chim Acta 2024; 561:119766. [PMID: 38857672 DOI: 10.1016/j.cca.2024.119766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 06/05/2024] [Accepted: 06/05/2024] [Indexed: 06/12/2024]
Abstract
This review provides a comprehensive overview of the latest advancements in wearable biosensors, emphasizing their applications in cardiovascular disease monitoring. Initially, the key sensing signals and biomarkers crucial for cardiovascular health, such as electrocardiogram, phonocardiography, pulse wave velocity, blood pressure, and specific biomarkers, are highlighted. Following this, advanced sensing techniques for cardiovascular disease monitoring are examined, including wearable electrophysiology devices, optical fibers, electrochemical sensors, and implantable cardiac devices. The review also delves into hydrogel-based wearable electrochemical biosensors, which detect biomarkers in sweat, interstitial fluids, saliva, and tears. Further attention is given to flexible electronics-based biosensors, including resistive, capacitive, and piezoelectric force sensors, as well as resistive and pyroelectric temperature sensors, flexible biochemical sensors, and sensor arrays. Moreover, the discussion extends to polymer-based wearable sensors, focusing on innovations in contact lens, textile-type, patch-type, and tattoo-type sensors. Finally, the review addresses the challenges associated with recent wearable biosensing technologies and explores future perspectives, highlighting potential groundbreaking avenues for transforming wearable sensing devices into advanced diagnostic tools with multifunctional capabilities for cardiovascular disease monitoring and other healthcare applications.
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Affiliation(s)
- Bhavadharani Anbuselvam
- School of Chemical & Biotechnology (SCBT), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Balu Mahendran Gunasekaran
- School of Chemical & Biotechnology (SCBT), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India; Center for Nanotechnology & Advanced Biomaterials (CENTAB), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Soorya Srinivasan
- Department of Mechanical Engineering, IIT Madras, Chennai 600036, Tamil Nadu, India
| | - Madeshwari Ezhilan
- Department of Biomedical Engineering, Vel Tech Rangarajan Dr. Sagunthala R & D Institute of Science and Technology, Vel Nagar, Avadi, Chennai 600062, Tamil Nadu, India.
| | - Venkatachalam Rajagopal
- Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - Noel Nesakumar
- School of Chemical & Biotechnology (SCBT), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India; Center for Nanotechnology & Advanced Biomaterials (CENTAB), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India.
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3
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Zhang Y, Xia H, Yang Q, Xu Z, Wang W, Yuan Z, Li Z, Cao S, Guan BO, Qiu L, Ran Y. A capillary-aided microfiber Bragg grating pH sensor for hydrovoltaic technology. Talanta 2024; 274:125958. [PMID: 38574534 DOI: 10.1016/j.talanta.2024.125958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/17/2024] [Accepted: 03/18/2024] [Indexed: 04/06/2024]
Abstract
Hydrovoltaic is an emerging technology that aims to harvest energy from water flow and evaporation, in which the plasmonic hydrogen ions are generated by the interaction between water and hydrovoltaic device. However, the volume of the water sample for the interaction is usually ultra-small due to the compact size of hydrovoltaic device, making the quantification and characterization of the hydrogen ions in such water sample an elusive goal. To address this issue, a miniature fiber-optic pH probe is proposed using a unilaterally tapered-microfiber Bragg grating. The microfiber Bragg grating has an intrinsic Bragg reflection signal with a narrow linewidth. The fiber probe is functionalized by coating the sodium alginate, which can respond to the variation of pH mediated by the alteration of the hydrophilicity. The rigidity and robustness of microfiber Bragg grating facilitates the encapsulation of the sensor into a sampling capillary, allowing for the detection of trace aqueous sample less than 2 μL. The pH sensitivity of the tapered-μFBG-based sensor is 62.8 p.m./pH (R2 = 0.995) with a limit resolution of 0.096 pH. The sensor performed a practical application in the monitoring and characterization of the hydrovoltaic microdevice, which can generate microcurrent as soaked in the water. This work demonstrates a promising technology in the fields of materials, energy, biology and medicine, in which the detection of the microsamples is inevitable.
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Affiliation(s)
- Yongkang Zhang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China; College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China.
| | - Heyi Xia
- Shenzhen Geim Graphene Center, Institute of Materials Research (IMR), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Qiaochu Yang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China; College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China.
| | - Zhiyuan Xu
- The Affiliated Guangdoṇng Second Provincial General Hospital of Jinan University, Guangzhou, 510632, China.
| | - Wenbo Wang
- Shenzhen Geim Graphene Center, Institute of Materials Research (IMR), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Ziyu Yuan
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China; College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China.
| | - Zesen Li
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China; College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China.
| | - Shifang Cao
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China; College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China.
| | - Bai-Ou Guan
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China; College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China.
| | - Ling Qiu
- Shenzhen Geim Graphene Center, Institute of Materials Research (IMR), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Yang Ran
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China; College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China; The Affiliated Guangdoṇng Second Provincial General Hospital of Jinan University, Guangzhou, 510632, China.
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Cao S, Chen R, Yang Q, He X, Chiavaioli F, Ran Y, Guan BO. Point-of-care diagnosis of pre-eclampsia based on microfiber Bragg grating biosensor. Biosens Bioelectron 2024; 249:116014. [PMID: 38219469 DOI: 10.1016/j.bios.2024.116014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/30/2023] [Accepted: 01/07/2024] [Indexed: 01/16/2024]
Abstract
Pre-eclampsia is a serious multi-organ complication that severely threatens the safety of pregnant women and infants. To accurate and timely diagnose pre-eclampsia, point-of-care (POC) biosensing of the specific biomarkers is urgently required. However, one of the key biomarkers of pre-eclampsia, placental growth factor (PlGF), has a reduced level of expression in patients, which challenges the quantification capability and Limit-of-detection (LOD) of biosensors. Herein, we reported a microfiber Bragg grating biosensor for the quantification of PlGF in clinical serum samples. The Bragg grating was inscribed in a unilateral tapered fiber to generate the segmented Fabry-Perot spectrum for improving the capability of detection. Furthermore, a temperature-calibrated Bragg grating was added to enable dual parametric detection of PlGF and temperature simultaneously for removing the crosstalk. Finally, the biosensor was envisaged to be perfectly compatible with microfluidic chips, and thus dramatically reducing the sample consumption to as small as 10 μL. The proposed biosensor can respond to PlGF with concentrations ranging from 5 to 120 pg mL-1, attaining a LOD of 5 pg mL-1 of clinical relevance. More importantly, the biosensor achieved micro volume detection of clinical serum samples from patients, and the ROC curve with an AUC of 0.977 confirmed the viability of the device. Our study paves the way to a new idea for cost-effective and high-precision screening of patients with pre-eclampsia, and hence envisages a promising prospect for point-of-care (POC) diagnosis of patients with pre-eclampsia.
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Affiliation(s)
- Shifang Cao
- Clinical Laboratory Center, The First Clinical Medical College, Jinan University, Guangzhou, 510630, China; Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China
| | - Ruiping Chen
- Department of Obstetrics and Gynecology, The First Clinical Medical College, Jinan University, Guangzhou, 510630, China.
| | - Qiaochu Yang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China
| | - Xin He
- Clinical Laboratory Center, The First Clinical Medical College, Jinan University, Guangzhou, 510630, China.
| | - Francesco Chiavaioli
- National Research Council of Italy (CNR), Institute of Applied Physics "Nello Carrara", Sesto Fiorentino, 50019, Italy
| | - Yang Ran
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China.
| | - Bai-Ou Guan
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 510632, China
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Niu P, Jiang J, Liu K, Zhou X, Wang S, Xu T, Wang T, Li Y, Yang Q, Liu T. Hollow-microsphere-integrated optofluidic immunochip for myocardial infarction biomarker microanalysis. Biosens Bioelectron 2024; 248:115970. [PMID: 38150798 DOI: 10.1016/j.bios.2023.115970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 12/14/2023] [Accepted: 12/22/2023] [Indexed: 12/29/2023]
Abstract
This work developed an optofluidic immunochip that uses whispering gallery mode with fiber laser enhancement, for the rapid detection of a key biomarker cardiac troponin I for acute myocardial infarction (AMI). The immunochip adopted an innovative design, using perforated hollow glass microspheres (HGMS) as carriers, with antibodies immobilized on the inner surface of the HGMS, thereby achieving ultra-low sample consumption. The performance of the immunochip was improved by fiber laser, including spectral width compression to 0.019 nm, optical signal-to-noise ratio amplification to 63.17 dB, and an enhancement in the limit of detection to 5 pg/mL. Moreover, this immunochip can provide results within 15 min, making it highly suitable for early AMI risk management. Compared to the standard electrochemiluminescence detection method, although some differences exist in the results of the immunochip due to the principle of detection and differences in antibody affinity, its positive reference value can be calculated as 0.0754 ng/mL, with a successful recognition rate of 88% for positive patients. The immunosensor is integrated on a polydimethylsiloxane substrate, with a compact size suitable for use in point-of-care devices and AMI self-screening, as well as rapid disease screening and microanalysis of various biomarkers, offering new possibilities for applications in these fields.
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Affiliation(s)
- Panpan Niu
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Junfeng Jiang
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China.
| | - Kun Liu
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China.
| | - Xin Zhou
- Department of Cardiology, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Shuang Wang
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Tianhua Xu
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China; School of Engineering, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Tong Wang
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Yongle Li
- Department of Cardiology, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Qing Yang
- Department of Cardiology, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Tiegen Liu
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
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Lu R, Yue X, Yang Q, Song E, Peng B, Ran Y. Multi-node wearable optical sensor based on microfiber Bragg gratings. OPTICS EXPRESS 2024; 32:8496-8505. [PMID: 38571107 DOI: 10.1364/oe.507101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 01/25/2024] [Indexed: 04/05/2024]
Abstract
Flexibly wearable sensors are widely applied in health monitoring and personalized therapy. Multiple-node sensing is essential for mastering the health condition holistically. In this work, we report a multi-node wearable optical sensor (MNWOS) based on the cascade of microfiber Bragg gratings (µFBG), which features the reflective operation mode and ultra-compact size, facilitating the functional integration in a flexible substrate pad. The MNWOS can realize multipoint monitoring on physical variables, such as temperature and pressure, in both static and dynamic modes. Furthermore, the eccentric package configuration endows the MNWOS with the discernibility of bending direction in addition to the bending angle sensing. The multi-parameter sensing is realized by solving the sensing matrix that represents different sensitivity regarding the bending and temperature between FBGs. The MNWOS offers great prospect for the development of human-machine interfaces and medical and health detection.
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Bekmurzayeva A, Nurlankyzy M, Abdossova A, Myrkhiyeva Z, Tosi D. All-fiber label-free optical fiber biosensors: from modern technologies to current applications [Invited]. BIOMEDICAL OPTICS EXPRESS 2024; 15:1453-1473. [PMID: 38495725 PMCID: PMC10942689 DOI: 10.1364/boe.515563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/16/2024] [Accepted: 01/26/2024] [Indexed: 03/19/2024]
Abstract
Biosensors are established as promising analytical tools for detecting various analytes important in biomedicine and environmental monitoring. Using fiber optic technology as a sensing element in biosensors offers low cost, high sensitivity, chemical inertness, and immunity to electromagnetic interference. Optical fiber sensors can be used in in vivo applications and multiplexed to detect several targets simultaneously. Certain configurations of optical fiber technology allow the detection of analytes in a label-free manner. This review aims to discuss recent advances in label-free optical fiber biosensors from a technological and application standpoint. First, modern technologies used to build label-free optical fiber-based sensors will be discussed. Then, current applications where these technologies are applied are elucidated. Namely, examples of detecting soluble cancer biomarkers, hormones, viruses, bacteria, and cells are presented.
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Affiliation(s)
- Aliya Bekmurzayeva
- National Laboratory Astana, Nazarbayev University, Astana, 010000, Kazakhstan
| | - Marzhan Nurlankyzy
- National Laboratory Astana, Nazarbayev University, Astana, 010000, Kazakhstan
- School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan
| | - Albina Abdossova
- School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan
| | - Zhuldyz Myrkhiyeva
- National Laboratory Astana, Nazarbayev University, Astana, 010000, Kazakhstan
- School of Sciences and Humanities, Nazarbayev University, Astana, 010000, Kazakhstan
| | - Daniele Tosi
- National Laboratory Astana, Nazarbayev University, Astana, 010000, Kazakhstan
- School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan
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Chen T, Jiang H, Xie K, Xia H. A Small Highly Sensitive Glucose Sensor Based on a Glucose Oxidase-Modified U-Shaped Microfiber. SENSORS (BASEL, SWITZERLAND) 2024; 24:684. [PMID: 38276375 PMCID: PMC10820248 DOI: 10.3390/s24020684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/10/2024] [Accepted: 01/14/2024] [Indexed: 01/27/2024]
Abstract
Diabetes patients need to monitor blood glucose all year round. In this article, a novel scheme is proposed for blood glucose detection. The proposed sensor is based on a U-shaped microfiber prepared using hydrogen-oxygen flame-heating technology, and then 3-aminopropyltriethoxysilane (APTES) and glucose oxidase (GOD) are successively coated on the surface of the U-shaped microfiber via a coating technique. The glucose reacts with the GOD of the sensor surface to produce gluconic acid, which changes the effective refractive index and then shifts the interference wavelength. The structure and morphology of the sensor were characterized via scanning electron microscope (SEM) and confocal laser microscopy (CLM). The experimental results show that the sensitivity of the sensor is as high as 5.73 nm/(mg/mL). Compared with the glucose sensor composed of the same material, the sensitivity of the sensor increased by 329%. The proposed sensor has a broad application prospect in blood glucose detection of diabetic patients due to the advantages of miniaturization, high sensitivity, and good stability.
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Affiliation(s)
- Tingkuo Chen
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;
| | - Haiming Jiang
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;
| | - Kang Xie
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;
| | - Hongyan Xia
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
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Rakhimbekova A, Kudaibergenov B, Seitkamal K, Bellone A, Dauletova A, Sypabekova M, Olivero M, Perrone G, Radaelli A, Zanotto C, De Giuli Morghen C, Vangelista L, Tosi D. Rapid detection of vaccinia virus using biofunctionalized fiber-optic ball-tip biosensors. Sci Rep 2023; 13:17470. [PMID: 37838808 PMCID: PMC10576743 DOI: 10.1038/s41598-023-44926-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 10/13/2023] [Indexed: 10/16/2023] Open
Abstract
In this work, we present the development and biofunctionalization of a fiber-optic ball-resonator biosensor for the real-time detection of vaccinia poxvirus. We fabricated several ball-tip resonators, functionalized through a silanization process to immobilize two bioreceptors: the monoclonal anti-L1R antibody targeting the L1R protein, and the polyclonal rabbit serum antibodies targeting the whole vaccinia virus (VV) pathogen. Experimental measurements were carried out to detect VV in concentrations from 103 to 108 plaque-forming units (PFU), with a limit of detection of around 1.7-4.3 × 103 PFU and a log-quadratic pattern, with a response up to 5 × 10-4 RIU (refractive index units). The specificity was assessed against herpes simplex virus, used as a non-specific control, with the best results obtained with anti-L1R monoclonal antibodies, and through the detection of vaccinia virus/herpes simplex-1 combination. The obtained results provide a real-time viral recognition with a label-free sensing platform, having rapid response and ease of manufacturing, and paving the road to the seamless detection of poxviruses affecting different human and animal species using optical fibers.
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Affiliation(s)
- Aida Rakhimbekova
- Department of Electrical and Computer Engineering, School of Engineering and Digital Sciences, Nazarbayev University, 010000, Astana, Kazakhstan
| | - Baizak Kudaibergenov
- Department of Electrical and Computer Engineering, School of Engineering and Digital Sciences, Nazarbayev University, 010000, Astana, Kazakhstan
| | - Kuanysh Seitkamal
- Department of Biomedical Sciences, School of Medicine, Nazarbayev University, 010000, Astana, Kazakhstan
| | - Aurora Bellone
- Department of Electronics and Telecommunications, Politecnico Di Torino, Turin, Italy
| | - Ayazhan Dauletova
- Department of Electrical and Computer Engineering, School of Engineering and Digital Sciences, Nazarbayev University, 010000, Astana, Kazakhstan
| | - Marzhan Sypabekova
- Department of Electrical & Computer Engineering, Baylor University, Waco, TX, USA
| | - Massimo Olivero
- Department of Electronics and Telecommunications, Politecnico Di Torino, Turin, Italy
| | - Guido Perrone
- Department of Electronics and Telecommunications, Politecnico Di Torino, Turin, Italy
| | - Antonia Radaelli
- Department of Medical Biotechnologies and Translational Medicine, Laboratory of Molecular Virology and Recombinant Vaccine Development, University of Milan, Via Vanvitelli 32, Milan, Italy
- Catholic University "Our Lady of Good Counsel", Rr. Dritan Hoxha, Tirana, Albania
| | - Carlo Zanotto
- Department of Medical Biotechnologies and Translational Medicine, Laboratory of Molecular Virology and Recombinant Vaccine Development, University of Milan, Via Vanvitelli 32, Milan, Italy
| | | | - Luca Vangelista
- Department of Biomedical Sciences, School of Medicine, Nazarbayev University, 010000, Astana, Kazakhstan
- Department of Molecular Medicine, University of Pavia, 27100, Pavia, Italy
| | - Daniele Tosi
- Department of Electrical and Computer Engineering, School of Engineering and Digital Sciences, Nazarbayev University, 010000, Astana, Kazakhstan.
- Laboratory of Biosensors and Bioinstruments, National Laboratory Astana, 010000, Astana, Kazakhstan.
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Hu J, Song E, Liu Y, Yang Q, Sun J, Chen J, Meng Y, Jia Y, Yu Z, Ran Y, Shao L, Shum PP. Fiber Laser-Based Lasso-Shaped Biosensor for High Precision Detection of Cancer Biomarker-CEACAM5 in Serum. BIOSENSORS 2023; 13:674. [PMID: 37504073 PMCID: PMC10377356 DOI: 10.3390/bios13070674] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/09/2023] [Accepted: 06/21/2023] [Indexed: 07/29/2023]
Abstract
Detection of trace tumor markers in blood/serum is essential for the early screening and prognosis of cancer diseases, which requires high sensitivity and specificity of the assays and biosensors. A variety of label-free optical fiber-based biosensors has been developed and yielded great opportunities for Point-of-Care Testing (POCT) of cancer biomarkers. The fiber biosensor, however, suffers from a compromise between the responsivity and stability of the sensing signal, which would deteriorate the sensing performance. In addition, the sophistication of sensor preparation hinders the reproduction and scale-up fabrication. To address these issues, in this study, a straightforward lasso-shaped fiber laser biosensor was proposed for the specific determination of carcinoembryonic antigen (CEA)-related cell adhesion molecules 5 (CEACAM5) protein in serum. Due to the ultra-narrow linewidth of the laser, a very small variation of lasing signal caused by biomolecular bonding can be clearly distinguished via high-resolution spectral analysis. The limit of detection (LOD) of the proposed biosensor could reach 9.6 ng/mL according to the buffer test. The sensing capability was further validated by a human serum-based cancer diagnosis trial, enabling great potential for clinical use. The high reproduction of fabrication allowed the mass production of the sensor and extended its utility to a broader biosensing field.
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Affiliation(s)
- Jie Hu
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Enlai Song
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Yuhui Liu
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Qiaochu Yang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Junhui Sun
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jinna Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yue Meng
- Department of Clinical Laboratory, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 511436, China
| | - Yanwei Jia
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, Faculty of Science and Technology-ECE, Faculty of Health Sciences, MoE Frontiers Science Center for Precision Oncology, University of Macau, Macau 999078, China
| | - Zhiguang Yu
- Medcaptain Medical Technology Co., Ltd., Shenzhen 518055, China
| | - Yang Ran
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Liyang Shao
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Perry Ping Shum
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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11
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Polonschii C, Potara M, Iancu M, David S, Banciu RM, Vasilescu A, Astilean S. Progress in the Optical Sensing of Cardiac Biomarkers. BIOSENSORS 2023; 13:632. [PMID: 37366997 PMCID: PMC10296523 DOI: 10.3390/bios13060632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 05/30/2023] [Accepted: 06/02/2023] [Indexed: 06/28/2023]
Abstract
Biomarkers play key roles in the diagnosis, risk assessment, treatment and supervision of cardiovascular diseases (CVD). Optical biosensors and assays are valuable analytical tools answering the need for fast and reliable measurements of biomarker levels. This review presents a survey of recent literature with a focus on the past 5 years. The data indicate continuing trends towards multiplexed, simpler, cheaper, faster and innovative sensing while newer tendencies concern minimizing the sample volume or using alternative sampling matrices such as saliva for less invasive assays. Utilizing the enzyme-mimicking activity of nanomaterials gained ground in comparison to their more traditional roles as signaling probes, immobilization supports for biomolecules and for signal amplification. The growing use of aptamers as replacements for antibodies prompted emerging applications of DNA amplification and editing techniques. Optical biosensors and assays were tested with larger sets of clinical samples and compared with the current standard methods. The ambitious goals on the horizon for CVD testing include the discovery and determination of relevant biomarkers with the help of artificial intelligence, more stable specific recognition elements for biomarkers and fast, cheap readers and disposable tests to facilitate rapid testing at home. As the field is progressing at an impressive pace, the opportunities for biosensors in the optical sensing of CVD biomarkers remain significant.
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Affiliation(s)
- Cristina Polonschii
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania; (C.P.); (S.D.); (R.M.B.)
| | - Monica Potara
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, T. Laurian Str. 42, 400271 Cluj-Napoca, Romania; (M.P.); (S.A.)
| | - Madalina Iancu
- “Professor Dr. Agrippa Ionescu” Clinical Emergency Hospital, 7 Architect Ion Mincu Street, 011356 Bucharest, Romania;
| | - Sorin David
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania; (C.P.); (S.D.); (R.M.B.)
| | - Roberta Maria Banciu
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania; (C.P.); (S.D.); (R.M.B.)
- Faculty of Chemistry, University of Bucharest, 4-12 “Regina Elisabeta” Blvd., 030018 Bucharest, Romania
| | - Alina Vasilescu
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania; (C.P.); (S.D.); (R.M.B.)
| | - Simion Astilean
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, T. Laurian Str. 42, 400271 Cluj-Napoca, Romania; (M.P.); (S.A.)
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12
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Song E, Long X, Yang Q, Jin F, Yue X, Li Z, Liang L, Ran Y, Guan BO. Near-infrared microfiber Bragg grating for sensitive measurement of tension and bending. OPTICS EXPRESS 2023; 31:15674-15681. [PMID: 37157662 DOI: 10.1364/oe.487533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Fiber-optic devices working in the visible and near-infrared windows are attracting attention due to the rapid development of biomedicine that involves optics. In this work, we have successfully realized the fabrication of near-infrared microfiber Bragg grating (NIR-µFBG), which was operated at the wavelength of 785 nm, by harnessing the fourth harmonic order of Bragg resonance. The NIR-µFBG provided the maximum sensitivity of axial tension and bending to 211 nm/N and 0.18 nm/deg, respectively. By conferring the considerably lower cross-sensitivity, such as response to temperature or ambient refractive index, the NIR-µFBG can be potentially implemented as the highly sensitive tensile force and curve sensor.
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13
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Tang L, Yang J, Wang Y, Deng R. Recent Advances in Cardiovascular Disease Biosensors and Monitoring Technologies. ACS Sens 2023; 8:956-973. [PMID: 36892106 DOI: 10.1021/acssensors.2c02311] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2023]
Abstract
Cardiovascular disease (CVD) causes significant mortality and remains the leading cause of death globally. Thus, to reduce mortality, early diagnosis by measurement of cardiac biomarkers and heartbeat signals presents fundamental importance. Traditional CVD examination requires bulky hospital instruments to conduct electrocardiography recording and immunoassay analysis, which are both time-consuming and inconvenient. Recently, development of biosensing technologies for rapid CVD marker screening attracted great attention. Thanks to the advancement in nanotechnology and bioelectronics, novel biosensor platforms are developed to achieve rapid detection, accurate quantification, and continuous monitoring throughout disease progression. A variety of sensing methodologies using chemical, electrochemical, optical, and electromechanical means are explored. This review first discusses the prevalence and common categories of CVD. Then, heartbeat signals and cardiac blood-based biomarkers that are widely employed in clinic, as well as their utilizations for disease prognosis, are summarized. Emerging CVD wearable and implantable biosensors and monitoring bioelectronics, allowing these cardiac markers to be continuously measured are introduced. Finally, comparisons of the pros and cons of these biosensing devices along with perspectives on future CVD biosensor research are presented.
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Affiliation(s)
- Lichao Tang
- Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, 60208, Illinois, United States
| | - Jiyuan Yang
- Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, 47906, Indiana, United States
| | - Yuxi Wang
- Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
- Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Ruijie Deng
- College of Biomass Science and Engineering, Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610064, Sichuan, China
- Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
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14
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Rohan R, Venkadeshwaran K, Ranjan P. Recent advancements of fiber Bragg grating sensors in biomedical application: a review. JOURNAL OF OPTICS 2023. [PMCID: PMC9976692 DOI: 10.1007/s12596-023-01134-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 02/09/2023] [Indexed: 10/20/2023]
Abstract
Due to attractive application in the medical field, fiber Bragg grating sensor has become increasing attractive from past few decades for various strain sensing applications. FBG sensor has been used in many applications such as different surgical devices, vital sign detection devices, invasive surgery, heart rate, dental applications and biosensing application as wearable sensing devices. This paper reviews the 55 recent research articles published on fiber Bragg grating sensor for biomedical application used the qualitative, quantitative and experimental method to identify the recent advancement and challenges. In this study, particular focus is placed on applications for biomechanical devices, temperature monitors, respiratory monitors, and biosensing applications. Critical things, demands, and emerging trends for these sensing devices are also discussed in order to determine what will be needed for the next generation.
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Affiliation(s)
- R. Rohan
- Department of Mechanical, Faculty of Engineering and Technology, JAIN (Deemed to Be-University), Bangalore, India
| | - K. Venkadeshwaran
- Department of Mechanical, Faculty of Engineering and Technology, JAIN (Deemed to Be-University), Bangalore, India
| | - Prakash Ranjan
- Department of Mechanical, Faculty of Engineering and Technology, JAIN (Deemed to Be-University), Bangalore, India
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15
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Zhou C, Lin Z, Huang S, Li B, Gao A. Progress in Probe-Based Sensing Techniques for In Vivo Diagnosis. BIOSENSORS 2022; 12:943. [PMID: 36354452 PMCID: PMC9688418 DOI: 10.3390/bios12110943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/13/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Advancements in robotic surgery help to improve the endoluminal diagnosis and treatment with minimally invasive or non-invasive intervention in a precise and safe manner. Miniaturized probe-based sensors can be used to obtain information about endoluminal anatomy, and they can be integrated with medical robots to augment the convenience of robotic operations. The tremendous benefit of having this physiological information during the intervention has led to the development of a variety of in vivo sensing technologies over the past decades. In this paper, we review the probe-based sensing techniques for the in vivo physical and biochemical sensing in China in recent years, especially on in vivo force sensing, temperature sensing, optical coherence tomography/photoacoustic/ultrasound imaging, chemical sensing, and biomarker sensing.
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Affiliation(s)
- Cheng Zhou
- Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai 200240, China
- Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zecai Lin
- Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai 200240, China
- Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shaoping Huang
- Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai 200240, China
- Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Bing Li
- Institute for Materials Discovery, University College London, London WC1E 7JE, UK
| | - Anzhu Gao
- Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai 200240, China
- Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
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16
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Prefab Hollow Glass Microsphere-Based Immunosensor with Liquid Crystal Sensitization for Acute Myocardial Infarction Biomarker Detection. BIOSENSORS 2022; 12:bios12070439. [PMID: 35884242 PMCID: PMC9312929 DOI: 10.3390/bios12070439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 06/20/2022] [Accepted: 06/21/2022] [Indexed: 11/18/2022]
Abstract
Quantitative detection of cardiac troponin biomarkers in blood is an important method for clinical diagnosis of acute myocardial infarction (AMI). In this work, a whispering gallery mode (WGM) microcavity immunosensor based on a prefab hollow glass microsphere (HGMS) with liquid crystal (LC) sensitization was proposed and experimentally demonstrated for label-free cardiac troponin I-C (cTnI-C) complex detection. The proposed fiber-optic immunosensor has a simple structure; the tiny modified HGMS serves as the key sensing element and the microsample reservoir simultaneously. A sensitive LC layer with cTnI-C recognition ability was deposited on the inner wall of the HGMS microcavity. The arrangement of LC molecules is affected by the cTnI-C antigen—antibody binding in the HGMS, and the small change of the surface refractive index caused by the binding can be amplified owing to the birefringence property of LC. Using the annular waveguide of the HGMS, the WGMs were easily excited by the coupling scanning laser with a microfiber, and an all-fiber cTnI-C immunosensor can be achieved by measuring the resonant wavelength shift of the WGM spectrum. Moreover, the dynamic processes of the cTnI-C antigen—antibody binding and unbinding was revealed by monitoring the wavelength shift continuously. The proposed immunosensor with a spherical microcavity can be a cost-effective tool for AMI diagnosis.
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17
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Yang Q, Hao Y, Long X, Wu Y, Yue X, Cai J, Xu Z, Ran Y, Jin L, Guan BO. Third harmonic phase-shifted Bragg grating sensor. OPTICS LETTERS 2022; 47:1941-1944. [PMID: 35427306 DOI: 10.1364/ol.457540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 03/18/2022] [Indexed: 06/14/2023]
Abstract
Improving sensitivity is critical for the higher-order harmonic fiber Bragg grating sensors. To this aim, in this work, we have successfully introduced the phase-shift into the third harmonic fiber Bragg grating for tailoring a double-dip spectrum with a high finesse notch. The dual dips showed reversed responses for the intensity regarding the change of the temperature or axial strain, enabling a highly sensitive measuring regime using the intensity contrast between the two dips. Deduced from the sinusoidal responding curves, the highest temperature and the axial strain sensitivity could reach 0.964 dB/°C, and 0.0257 dB/μ ε, three-fold times the other intensity-based fiber sensors. This work may promote the higher-order harmonic gratings into applications for enriching wavelength utilization.
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18
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Niu P, Jiang J, Liu K, Wang S, Jing J, Xu T, Wang T, Liu Y, Liu T. Fiber-integrated WGM optofluidic chip enhanced by microwave photonic analyzer for cardiac biomarker detection with ultra-high resolution. Biosens Bioelectron 2022; 208:114238. [PMID: 35390720 DOI: 10.1016/j.bios.2022.114238] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 02/28/2022] [Accepted: 03/29/2022] [Indexed: 12/30/2022]
Abstract
Cardiac troponin I (cTnI) plays an important role in emergency diagnosis of cardiovascular diseases, which exists predominately in the form of cardiac troponin I-C (cTnI-C) complex. We proposed a fiber-integrated optofluidic chip immunosensor with time-delay-dispersion based microwave photonic analyzer (MPA) for cTnI-C detection. The whispering gallery mode (WGM) fiber probe was fabricated by embedding a polydopamine functionalized hollow glass microsphere (HGMS) into the etched capillary-fiber structure, and the WGMs could be excited through the efficient coupling between the thin-wall capillary and the HGMS. The reflective WGM optofluidic chip functioned as a wavelength tuner to construct fiber ring laser cavity, whose laser output wavelength was cTnI-C concentration-dependent. The tiny wavelength variation of sensing laser was converted into a radio-frequency (RF) response, which was retrieved by measuring the change of RF-domain free spectrum range (FSR) in time-delay-dispersion based MPA, and the quantitative detection of cTnI-C complex can be achieved with high resolution. Experimental results show that this immunosensor had a limit of detection (LOD) of 0.59 ng/mL, and a detection resolution of 1.2 fg/mL. The relative resolving power was 102-104-fold higher than that of others optical fiber cTnI biosensors. The proposed fiber-integrated optofluidic chip provides an innovative lab-on-chip diagnostic tool for myocardial damage.
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Affiliation(s)
- Panpan Niu
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Junfeng Jiang
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China.
| | - Kun Liu
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Shuang Wang
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Jianying Jing
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Tianhua Xu
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Tong Wang
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Yize Liu
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
| | - Tiegen Liu
- School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Key Laboratory of Micro Opto-electro Mechanical System Technology (Tianjin University), Ministry of Education, Tianjin, 300072, China; Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin, 300072, China
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19
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Huang Y, Wang Y, Xu G, Rao X, Zhang J, Wu X, Liao C, Wang Y. Compact Surface Plasmon Resonance IgG Sensor Based on H-Shaped Optical Fiber. BIOSENSORS 2022; 12:bios12030141. [PMID: 35323411 PMCID: PMC8946733 DOI: 10.3390/bios12030141] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/21/2022] [Accepted: 02/23/2022] [Indexed: 05/28/2023]
Abstract
A compact surface plasmon resonance sensor based on an H-shaped optical fiber is proposed and demonstrated. The H-shaped optical fiber was fabricated experimentally by using hydrofluoric acid to controllably corrode the polarization-maintaining fiber. A satisfactory distance between the outer surface of the fiber and the core can be achieved, and then the surface plasmon resonance effect can be excited by coating a metal film of appropriate thickness on the surface of the fiber. This technology can realize the preparation of multiple samples at one time, compared to the traditional side-polishing technique. The H-shaped optical fiber obtained from corrosion exhibits a high surface quality and short lengths, down to only a few hundred microns. The effects of the proposed H-shaped optical fiber on spectral properties are induced by process parameters, including fiber remaining thickness, coating thickness and fiber length, and were investigated in detail. The prepared sensor was used for the specific detection of human IgG, and the minimum human IgG concentration that the sensor can distinguish is 3.4 μg/mL. Such a compact surface plasmon resonance fiber sensor has the advantages of an easy fabrication, good consistency and low cost, and is expected to be applied in the specific detection of biomarkers.
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Affiliation(s)
- Yijian Huang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (Y.H.); (X.R.); (J.Z.); (X.W.); (C.L.); (Y.W.)
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China;
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Ying Wang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (Y.H.); (X.R.); (J.Z.); (X.W.); (C.L.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Gaixia Xu
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China;
| | - Xing Rao
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (Y.H.); (X.R.); (J.Z.); (X.W.); (C.L.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Jiaxiong Zhang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (Y.H.); (X.R.); (J.Z.); (X.W.); (C.L.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Xun Wu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (Y.H.); (X.R.); (J.Z.); (X.W.); (C.L.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Changrui Liao
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (Y.H.); (X.R.); (J.Z.); (X.W.); (C.L.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Yiping Wang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (Y.H.); (X.R.); (J.Z.); (X.W.); (C.L.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
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20
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Zhong J, Liu S, Zou T, Yan W, Zhou M, Liu B, Rao X, Wang Y, Sun Z, Wang Y. All Fiber-Optic Immunosensors Based on Elliptical Core Helical Intermediate-Period Fiber Grating with Low-Sensitivity to Environmental Disturbances. BIOSENSORS 2022; 12:99. [PMID: 35200359 PMCID: PMC8869875 DOI: 10.3390/bios12020099] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 01/29/2022] [Accepted: 02/03/2022] [Indexed: 06/14/2023]
Abstract
An all fiber-optic immunosensor based on elliptical core helical intermediate-period fiber grating (E-HIPFG) is proposed for the specific detection of human immunoglobulin G (human IgG). E-HIPFGs are all-fiber transducers that do not include any additional coating materials or fiber architectures, simplifying the fabrication process and promising the stability of the E-HIPFG biosensor. For human IgG recognition, the surface of an E-HIPFG is functionalized by goat anti-human IgG. The functionalized E-HIPFG is tested by human IgG solutions with a concentration range of 10-100 μg/mL and shows a high sensitivity of 0.018 nm/(μg/mL) and a limit of detection (LOD) of 4.7 μg/mL. Notably, the functionalized E-HIPFG biosensor is found to be insensitive to environmental disturbances, with a temperature sensitivity of 2.6 pm/°C, a strain sensitivity of 1.2 pm/με, and a torsion sensitivity of -23.566 nm/(rad/mm). The results demonstrate the considerable properties of the immunosensor, with high resistance to environmental perturbations, indicating significant potential for applications in mobile biosensors and compact devices.
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Affiliation(s)
- Junlan Zhong
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Shen Liu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Tao Zou
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Wenqi Yan
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Min Zhou
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Bonan Liu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Xing Rao
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Ying Wang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Zhongyuan Sun
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Tings, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China
| | - Yiping Wang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (J.Z.); (T.Z.); (W.Y.); (M.Z.); (B.L.); (X.R.); (Y.W.); (Z.S.); (Y.W.)
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Loyez M, DeRosa MC, Caucheteur C, Wattiez R. Overview and emerging trends in optical fiber aptasensing. Biosens Bioelectron 2022; 196:113694. [PMID: 34637994 DOI: 10.1016/j.bios.2021.113694] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 12/16/2022]
Abstract
Optical fiber biosensors have attracted growing interest over the last decade and quickly became a key enabling technology, especially for the detection of biomarkers at extremely low concentrations and in small volumes. Among the many and recent fiber-optic sensing amenities, aptamers-based sensors have shown unequalled performances in terms of ease of production, specificity, and sensitivity. The immobilization of small and highly stable bioreceptors such as DNA has bolstered their use for the most varied applications e.g., medical diagnosis, food safety and environmental monitoring. This review highlights the recent advances in aptamer-based optical fiber biosensors. An in-depth analysis of the literature summarizes different fiber-optic structures and biochemical strategies for molecular detection and immobilization of receptors over diverse surfaces. In this review, we analyze the features offered by those sensors and discuss about the next challenges to be addressed. This overview investigates both biochemical and optical parameters, drawing the guiding lines for forthcoming innovations and prospects in this ever-growing field of research.
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Affiliation(s)
- Médéric Loyez
- Proteomics and Microbiology Department, University of Mons, Avenue du Champ de Mars 6, 7000, Mons, Belgium; Electromagnetism and Telecommunication Department, University of Mons, Bld. Dolez 31, 7000, Mons, Belgium.
| | - Maria C DeRosa
- Department of Chemistry, 203 Steacie Building, Carleton University, 1125, Colonel By Drive, Ottawa, ON K1S 5B6, Canada
| | - Christophe Caucheteur
- Electromagnetism and Telecommunication Department, University of Mons, Bld. Dolez 31, 7000, Mons, Belgium
| | - Ruddy Wattiez
- Proteomics and Microbiology Department, University of Mons, Avenue du Champ de Mars 6, 7000, Mons, Belgium
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22
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Upadhyaya AM, Hasan MK, Abdel-Khalek S, Hassan R, Srivastava MC, Sharan P, Islam S, Saad AME, Vo N. A Comprehensive Review on the Optical Micro-Electromechanical Sensors for the Biomedical Application. Front Public Health 2021; 9:759032. [PMID: 34926383 PMCID: PMC8674308 DOI: 10.3389/fpubh.2021.759032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 09/15/2021] [Indexed: 11/13/2022] Open
Abstract
This study presented an overview of current developments in optical micro-electromechanical systems in biomedical applications. Optical micro-electromechanical system (MEMS) is a particular class of MEMS technology. It combines micro-optics, mechanical elements, and electronics, called the micro-opto electromechanical system (MOEMS). Optical MEMS comprises sensing and influencing optical signals on micron-level by incorporating mechanical, electrical, and optical systems. Optical MEMS devices are widely used in inertial navigation, accelerometers, gyroscope application, and many industrial and biomedical applications. Due to its miniaturised size, insensitivity to electromagnetic interference, affordability, and lightweight characteristic, it can be easily integrated into the human body with a suitable design. This study presented a comprehensive review of 140 research articles published on photonic MEMS in biomedical applications that used the qualitative method to find the recent advancement, challenges, and issues. The paper also identified the critical success factors applied to design the optimum photonic MEMS devices in biomedical applications. With the systematic literature review approach, the results showed that the key design factors could significantly impact design, application, and future scope of work. The literature of this paper suggested that due to the flexibility, accuracy, design factors efficiency of the Fibre Bragg Grating (FBG) sensors, the demand has been increasing for various photonic devices. Except for FBG sensing devices, other sensing systems such as optical ring resonator, Mach-Zehnder interferometer (MZI), and photonic crystals are used, which still show experimental stages in the application of biosensing. Due to the requirement of sophisticated fabrication facilities and integrated systems, it is a tough choice to consider the other photonic system. Miniaturisation of complete FBG device for biomedical applications is the future scope of work. Even though there is a lot of experimental work considered with an FBG sensing system, commercialisation of the final FBG device for a specific application has not been seen noticeable progress in the past.
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Affiliation(s)
- Anup M. Upadhyaya
- Department of Mechanical Engineering, Amity School of Engineering and Technology (ASET), Amity University, Noida, Lucknow, India
- Department of Mechanical Engineering, The Oxford College of Engineering, Bangalore, India
- Department of Electronics and Communication Engineering, The Oxford College of Engineering, Bangalore, India
| | - Mohammad Kamrul Hasan
- Network and Communication Technology Lab, Center for Cyber Security, Faculty of Information Science and Technology, The National University of Malaysia (UKM), Bangi, Malaysia
| | - S. Abdel-Khalek
- Department of Mathematics and Statistics, College of Science, Taif University, Taif, Saudi Arabia
| | - Rosilah Hassan
- Network and Communication Technology Lab, Center for Cyber Security, Faculty of Information Science and Technology, The National University of Malaysia (UKM), Bangi, Malaysia
| | - Maneesh C. Srivastava
- Department of Mechanical Engineering, Amity School of Engineering and Technology (ASET), Amity University, Noida, Lucknow, India
- Department of Mechanical Engineering, The Oxford College of Engineering, Bangalore, India
| | - Preeta Sharan
- Department of Electronics and Communication Engineering, The Oxford College of Engineering, Bangalore, India
| | - Shayla Islam
- Institute of Computer Science and Digital Innovation, University College Sedaya International (UCSI) University, Kuala Lumpur, Malaysia
| | - Asma Mohammed Elbashir Saad
- Department of Physics College of Science and Humanities in AL-Kharj, Prince Sattam Bin Abdulaziz University, AL-Kharj, Saudi Arabia
| | - Nguyen Vo
- Department of Information Technology, Victorian Institute of Technology, Melbourne, VIC, Australia
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23
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Optical Fiber Ball Resonator Sensor Spectral Interrogation through Undersampled KLT: Application to Refractive Index Sensing and Cancer Biomarker Biosensing. SENSORS 2021; 21:s21206721. [PMID: 34695934 PMCID: PMC8537289 DOI: 10.3390/s21206721] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 09/27/2021] [Accepted: 10/01/2021] [Indexed: 12/16/2022]
Abstract
Optical fiber ball resonators based on single-mode fibers in the infrared range are an emerging technology for refractive index sensing and biosensing. These devices are easy and rapid to fabricate using a CO2 laser splicer and yield a very low finesse reflection spectrum with a quasi-random pattern. In addition, they can be functionalized for biosensing by using a thin-film sputtering method. A common problem of this type of device is that the spectral response is substantially unknown, and poorly correlated with the size and shape of the spherical device. In this work, we propose a detection method based on Karhunen−Loeve transform (KLT), applied to the undersampled spectrum measured by an optical backscatter reflectometer. We show that this method correctly detects the response of the ball resonator in any working condition, without prior knowledge of the sensor under interrogation. First, this method for refractive index sensing of a gold-coated resonator is applied, showing 1594 RIU−1 sensitivity; then, this concept is extended to a biofunctionalized ball resonator, detecting CD44 cancer biomarker concentration with a picomolar-level limit of detection (19.7 pM) and high specificity (30–41%).
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Shallow-Tapered Chirped Fiber Bragg Grating Sensors for Dual Refractive Index and Temperature Sensing. SENSORS 2021; 21:s21113635. [PMID: 34073669 PMCID: PMC8197150 DOI: 10.3390/s21113635] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/14/2021] [Accepted: 05/18/2021] [Indexed: 12/20/2022]
Abstract
In this work, we present a gold-coated shallow-tapered chirped fiber Bragg grating (stCFBG) for dual refractive index (RI) and temperature sensing. The stCFBG has been fabricated on a 15-mm long chirped FBG, by tapering a 7.29-mm region with a waist of 39 μm. The spectral analysis shows two distinct regions: a pre-taper region, in which the stCFBG is RI-independent and can be used to detect thermal changes, and a post-taper region, in which the reflectivity increases significantly when the RI increments. We estimate the RI and thermal sensitivities as 382.83 dB/RIU and 9.893 pm/°C, respectively. The cross-talk values are low (−1.54 × 10−3 dB/°C and 568.1 pm/RIU), which allows an almost ideal separation between RI and thermal characteristics. The stCFBG is a compact probe, suitable for long-term and temperature-compensated biosensing and detection of chemical analytes.
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