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Zhu J, Zhao C, Xia B, Wang N, Chen X, Jing X, Chen M, Xu X. An enhanced SPR optical fiber biosensor using Ti 3C 2T x MXene/AuNPs for label-free and sensitive detection of human IgG. NANOSCALE 2024. [PMID: 39264164 DOI: 10.1039/d4nr01883d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2024]
Abstract
Abnormal human immunoglobulin G (IgG) may induce the risk of immune system disorder, infectious diseases, tumors and so on. However, the current detection methods exhibit low sensitivity, which limits their practical application. In this work, an SPR optical fiber sensor (SPR-OFS) with high sensitivity is designed for label-free detection of human IgG. It is fabricated using a heterostructure optical fiber coated with Au film/AuNPs and the Ti3C2Tx MXene biofunctionalized with goat anti-human IgG by polydopamine (PDA). In the experiment, the optimal thickness of the Ti3C2Tx MXene was explored and determined to be about 93 nm by comprehensively considering the refractive index (RI) sensitivity and spectral bandwidth of the SPR sensor. When the largest figure of merit (FOM) is calculated to be 17.8279 RIU-1, its RI sensitivity was ultimately found to be 2804.5 nm per RIU. The SPR-OFS was employed to detect human IgG within the concentration range of 0-30 μg mL-1 and its sensitivity is demonstrated to be 1.7046 nm (μg mL-1)-1. The SPR-OFS was also proved to have excellent linearity, specificity and stability. The proposed sensor offers outstanding performance with simple fabrication, providing a cutting-edge bioanalytical platform with potential applications in clinical diagnosis.
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Affiliation(s)
- Jiayi Zhu
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan, 430070, China.
| | - Chao Zhao
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan, 430070, China.
| | - Binyun Xia
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan, 430070, China.
| | - Ning Wang
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan, 430070, China.
| | - Xi Chen
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430071, China.
| | - Xinyue Jing
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan, 430070, China.
| | - Minxuan Chen
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan, 430070, China.
| | - Xinrui Xu
- National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan, 430070, China.
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Huang Y, Pu X, Qian H, Chuang CJ, Dong S, Wu J, Xue J, Cheng W, Ding S, Li S. Optical fiber surface plasmon resonance sensor using electroless-plated gold film for thrombin detection. Anal Bioanal Chem 2024; 416:1469-1483. [PMID: 38236393 DOI: 10.1007/s00216-024-05150-x] [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: 11/20/2023] [Revised: 12/27/2023] [Accepted: 01/11/2024] [Indexed: 01/19/2024]
Abstract
This paper describes the simple and label-free detection of thrombin using optical fiber surface plasmon resonance (SPR) sensors based on gold films prepared by the cost-effective method of electroless plating. The plating conditions for simultaneously obtaining gold film on cylindrical core and end surfaces of an optical fiber suitable for measurement were optimized. The fabricated sensor exhibited a linear refractive index sensitivity of 2150 nm/RIU and 7.136 (a.u.)/RIU in the refractive index of 1.3329-1.3605 interrogated by resonance wavelength and amplitude methods respectively and a single wavelength monitoring method was proposed to investigate the sensing performance of this sensor. Polyadenine diblock and thiolated thrombin aptamers were immobilized on gold nanoparticles and gold films respectively to implement a sandwich optical fiber assay for thrombin. The developed optical fiber SPR sensors were successfully used in the determination of thrombin down to 0.56 nM over a wide range from 2 to 100 nM and showed good selectivity for thrombin, which indicated their potential clinical applications for biomedical samples.
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Affiliation(s)
- Yu Huang
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China.
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, 400714, China.
| | - Xiaoyin Pu
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, 400714, China
| | - Husun Qian
- Department of Laboratory Medicine, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, Guizhou, China
| | - Chin-Jung Chuang
- Department of Opto-Electronic Engineering, National Dong Hwa University, Hualien, 97401, Taiwan, China
| | - Shanshan Dong
- Department of Clinical Laboratory, Medical Sciences Research Center, University-Town Hospital of Chongqing Medical University, Chongqing, 401331, China
| | - Jiangling Wu
- Department of Clinical Laboratory, Medical Sciences Research Center, University-Town Hospital of Chongqing Medical University, Chongqing, 401331, China.
| | - Jianjiang Xue
- Department of Clinical Laboratory, Medical Sciences Research Center, University-Town Hospital of Chongqing Medical University, Chongqing, 401331, China
| | - Wei Cheng
- The Center for Clinical Molecular Medical Detection, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Shijia Ding
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China
| | - Shengqiang Li
- Clinical Laboratory, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, 300000, China.
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, 300000, China.
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Li X, Wang N, Wang F, Liu J, Shi Y, Jiang J, Liu H, Li M, Zhang L, Zhang W, Zhao Y, Zhang L, Huang C. A parylene-mediated plasmonic-photonic hybrid fiber-optic sensor and its instrumentation for miniaturized and self-referenced biosensing. Analyst 2023; 148:1672-1681. [PMID: 36939193 DOI: 10.1039/d3an00028a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
With the development of advanced nanofabrication techniques over the past decades, different nanostructure-based plasmonic fiber-optic sensors have been developed and have presented a low limit of detection for various biomolecules. However, owing to both the dependence on complex equipment and the trade-off between the fabrication cost and sensing performance, nanostructured plasmonic fiber-optic sensors are rarely used outside laboratories. To facilitate wider application of the plasmonic fiber-optic sensors, a parylene-mediated hybrid plasmonic-photonic cavity-based sensor was developed. Compared with a similar plasmonic sensor which only works in the plasmonic mode, the proposed hybrid sensor shows a higher reproducibility (CV < 2.5%) due to its resistance to fabrication variations. Meanwhile, a self-referenced detection mechanism and a novel miniaturized system were developed to adapt to the hybrid resonance sensor. The entire system only has a weight of 263 g, and a size of 12 cm × 10 cm × 8 cm, and is especially suitable for outdoor applications in a handheld manner. In experiments, a high refractive index sensitivity of 3.148 RIU-1 and real-time biomolecule monitoring at nanomolar concentrations were achieved by the proposed system, further confirming the potential of the miniaturized system as a candidate for point-of-care health diagnostics outside laboratories.
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Affiliation(s)
- Xin Li
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Nanxi Wang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fei Wang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jinlong Liu
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yimin Shi
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiahong Jiang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China.
| | - Hongyao Liu
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China.
| | - Mingxiao Li
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China.
| | - Lina Zhang
- Department of Cellular and Molecular Biology, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing, 101149, China
| | - Wenchang Zhang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China.
| | - Yang Zhao
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China.
| | - Lingqian Zhang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China.
| | - Chengjun Huang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, 100029, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
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Properties of a Novel Salmonella Phage L66 and Its Application Based on Electrochemical Sensor-Combined AuNPs to Detect Salmonella. Foods 2022; 11:foods11182836. [PMID: 36140964 PMCID: PMC9498146 DOI: 10.3390/foods11182836] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/02/2022] [Accepted: 09/07/2022] [Indexed: 12/19/2022] Open
Abstract
Salmonella is widespread in nature and poses a significant threat to human health and safety. Phage is considered as a new tool for the control of food-borne pathogens. In this study, Salmonella phage L66 (phage L66) was isolated from sewage by using Salmonella Typhimurium ATCC 14028 as the host bacterium, and its basic properties were obtained by biological and bioinformatics analysis. Phage L66 had a broad host spectrum, with an optimal infection complex of 0.1 and an optimal adsorption rate of 90.06%. It also exhibited thermal stability between 30 °C~60 °C and pH stability pH from 3 to 12, and the average lysis amount was 46 PFU/cell. The genome sequence analysis showed that the genome length of phage L66 was 157,675 bp and the average GC content was 46.13%. It was predicted to contain 209 genes, 97 of which were annotated with known functions based on the evolutionary analysis, and phage L66 was attributed to the Kuttervirus genus. Subsequently, an electrochemical sensor using phage L66 as a recognition factor was developed and the working electrode GDE-AuNPs-MPA-Phage L66 was prepared by layer-by-layer assembly for the detection of Salmonella. The slope of the impedance was 0.9985 within the scope from 20 to 2 × 107 CFU/mL of bacterial concentration. The minimum detection limit of the method was 13 CFU/mL, and the average spiked recovery rate was 102.3% with a relative standard deviation of 5.16%. The specificity and stability of this sensor were excellent, and it can be applied for the rapid detection of Salmonella in various foods. It provides a phage-based electrochemical biosensor for the detection of pathogenic bacteria.
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