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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 (Basel) 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] [What about the content of this article? (0)] [Affiliation(s)] [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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2
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Hassan S, Schreib CC, Zhao X, Duret G, Roman DS, Nair V, Cohen-Karni T, Veiseh O, Robinson JT. Real-Time In Vivo Sensing of Nitric Oxide Using Photonic Microring Resonators. ACS Sens 2022; 7:2253-2261. [PMID: 35938877 DOI: 10.1021/acssensors.2c00756] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Real-time in vivo detection of biomarkers, particularly nitric oxide (NO), is of utmost importance for critical healthcare monitoring, therapeutic dosing, and fundamental understanding of NO's role in regulating many physiological processes. However, detection of NO in a biological medium is challenging due to its short lifetime and low concentration. Here, we demonstrate for the first time that photonic microring resonators (MRRs) can provide real-time, direct, and in vivo detection of NO in a mouse wound model. The MRR encodes the NO concentration information into its transfer function in the form of a resonance wavelength shift. We show that these functionalized MRRs, fabricated using complementary metal oxide semiconductor (CMOS) compatible processes, can achieve sensitive detection of NO (sub-μM) with excellent specificity and no apparent performance degradation for more than 24 h of operation in biological medium. With alternative functionalizations, this compact lab-on-chip optical sensing platform could support real-time in vivo detection of myriad of biochemical species.
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Affiliation(s)
- Sakib Hassan
- Electrical & Computer Engineering, Rice University, Houston, Texas 77005, United States
| | - Christian C Schreib
- Department of Bioengineering, Rice University, Houston, Texas 77005, United States
| | - Xuan Zhao
- Applied Physics Graduate Program, Smalley-Curl Institute, Rice University, Houston, Texas 77005, United States
| | - Guillaume Duret
- Electrical & Computer Engineering, Rice University, Houston, Texas 77005, United States
| | - Daniel S Roman
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Vishnu Nair
- Rice Neuroengineering Initiative, Rice University, Houston, Texas 77005, United States
| | - Tzahi Cohen-Karni
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Omid Veiseh
- Department of Bioengineering, Rice University, Houston, Texas 77005, United States
| | - Jacob T Robinson
- Electrical & Computer Engineering, Rice University, Houston, Texas 77005, United States.,Department of Bioengineering, Rice University, Houston, Texas 77005, United States.,Rice Neuroengineering Initiative, Rice University, Houston, Texas 77005, United States
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3
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di Biase L, Tinkhauser G, Martin Moraud E, Caminiti ML, Pecoraro PM, Di Lazzaro V. Adaptive, personalized closed-loop therapy for Parkinson's disease: biochemical, neurophysiological, and wearable sensing systems. Expert Rev Neurother 2021; 21:1371-1388. [PMID: 34736368 DOI: 10.1080/14737175.2021.2000392] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
INTRODUCTION Motor complication management is one of the main unmet needs in Parkinson's disease patients. AREAS COVERED Among the most promising emerging approaches for handling motor complications in Parkinson's disease, adaptive deep brain stimulation strategies operating in closed-loop have emerged as pivotal to deliver sustained, near-to-physiological inputs to dysfunctional basal ganglia-cortical circuits over time. Existing sensing systems that can provide feedback signals to close the loop include biochemical-, neurophysiological- or wearable-sensors. Biochemical sensing allows to directly monitor the pharmacokinetic and pharmacodynamic of antiparkinsonian drugs and metabolites. Neurophysiological sensing relies on neurotechnologies to sense cortical or subcortical brain activity and extract real-time correlates of symptom intensity or symptom control during DBS. A more direct representation of the symptom state, particularly the phenomenological differentiation and quantification of motor symptoms, can be realized via wearable sensor technology. EXPERT OPINION Biochemical, neurophysiologic, and wearable-based biomarkers are promising technological tools that either individually or in combination could guide adaptive therapy for Parkinson's disease motor symptoms in the future.
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Affiliation(s)
- Lazzaro di Biase
- Unit of Neurology, Neurophysiology, Neurobiology, Department of Medicine, Università Campus Bio-Medico Di Roma, Rome, Italy.,Brain Innovations Lab, Università Campus Bio-Medico Di Roma, Rome, Italy
| | - Gerd Tinkhauser
- Department of Neurology, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Eduardo Martin Moraud
- Department of Clinical Neurosciences, Lausanne University Hospital (Chuv) and University of Lausanne (Unil), Lausanne, Switzerland.,Defitech Center for Interventional Neurotherapies (.neurorestore), Lausanne University Hospital and Swiss Federal Institute of Technology (Epfl), Lausanne, Switzerland
| | - Maria Letizia Caminiti
- Unit of Neurology, Neurophysiology, Neurobiology, Department of Medicine, Università Campus Bio-Medico Di Roma, Rome, Italy
| | - Pasquale Maria Pecoraro
- Unit of Neurology, Neurophysiology, Neurobiology, Department of Medicine, Università Campus Bio-Medico Di Roma, Rome, Italy
| | - Vincenzo Di Lazzaro
- Unit of Neurology, Neurophysiology, Neurobiology, Department of Medicine, Università Campus Bio-Medico Di Roma, Rome, Italy
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Nam J, Byun E, Shim H, Kim E, Islam S, Park M, Kim A, Song SH. A Hydrogel-Based Ultrasonic Backscattering Wireless Biochemical Sensing. Front Bioeng Biotechnol 2020; 8:596370. [PMID: 33330426 PMCID: PMC7729131 DOI: 10.3389/fbioe.2020.596370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 11/05/2020] [Indexed: 11/17/2022] Open
Abstract
Wireless monitoring of the physio-biochemical information is becoming increasingly important for healthcare. In this work, we present a proof-of-concept hydrogel-based wireless biochemical sensing scheme utilizing ultrasound. The sensing system utilizes silica-nanoparticle embedded hydrogel deposited on a thin glass substrate, which presents two prominent interfaces for ultrasonic backscattering (tissue/glass and hydrogel/glass). To overcome the effect of the varying acoustic properties of the intervening biological tissues between the sensor and the external transducer, we implemented a differential mode of ultrasonic back-scattering. Here, we demonstrate a wireless pH measurement with a resolution of 0.2 pH level change and a wireless sensing range around 10 cm in a water tank.
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Affiliation(s)
- Juhong Nam
- Department of Electronics Engineering, Sookmyung Women's University, Seoul, South Korea
| | - Eunjeong Byun
- Department of Electronics Engineering, Sookmyung Women's University, Seoul, South Korea
| | - Hyunji Shim
- Department of Electronics Engineering, Sookmyung Women's University, Seoul, South Korea
| | - Esther Kim
- Department of Electronics Engineering, Sookmyung Women's University, Seoul, South Korea
| | - Sayemul Islam
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA, United States
| | - Moonchul Park
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA, United States
| | - Albert Kim
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA, United States
| | - Seung Hyun Song
- Department of Electronics Engineering, Sookmyung Women's University, Seoul, South Korea
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Ou H, Lu F, Xu Z, Lin YS. Terahertz Metamaterial with Multiple Resonances for Biosensing Application. Nanomaterials (Basel) 2020; 10:nano10061038. [PMID: 32485805 PMCID: PMC7352555 DOI: 10.3390/nano10061038] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/25/2020] [Accepted: 05/27/2020] [Indexed: 12/13/2022]
Abstract
A sickle-shaped metamaterial (SSM) based biochemical sensor with multiple resonances was investigated in the terahertz frequency range. The electromagnetic responses of SSM were found to be four resonances, namely dipolar, quadrupolar, octupolar and hexadecapolar plasmon resonances. They were generated from the interactions between SSM and perpendicularly incident terahertz waves. The sensing performances of SSM-based biochemical sensors were evaluated by changing ambient environments and analyte varieties. The highest values of sensitivity and figure of merit (FOM) for SSM covered with analyte thin-films were 471 GHz/RIU (refraction index unit) and 94 RIU−1, respectively. In order to further investigate the biosensing ability of the proposed SSM device, dielectric hemispheres and microfluidic chips were adopted to imitate dry and hydrous biological specimens, respectively. The results show that the sensing abilities of SSM-based biochemical sensors could be enhanced by increasing either the number of hemispheres or the channel width of the microfluidic chip. The highest sensitivity was 405 GHz/RIU for SSM integrated with microfluidic chips. Finally, three more realistic models were simulated to imitate real sensing situations, and the corresponding highest sensitivity was 502 GHz/RIU. The proposed SSM device paves the way to possible uses in biochemical sensing applications.
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Silver A, Kitadai H, Liu H, Granzier-Nakajima T, Terrones M, Ling X, Huang S. Chemical and Bio Sensing Using Graphene-Enhanced Raman Spectroscopy. Nanomaterials (Basel) 2019; 9:nano9040516. [PMID: 30986978 PMCID: PMC6523487 DOI: 10.3390/nano9040516] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 03/14/2019] [Accepted: 03/18/2019] [Indexed: 01/16/2023]
Abstract
Graphene is a two-dimensional (2D) material consisting of a single sheet of sp² hybridized carbon atoms laced in a hexagonal lattice, with potentially wide usage as a Raman enhancement substrate, also termed graphene-enhanced Raman scattering (GERS), making it ideal for sensing applications. GERS improves upon traditional surface-enhanced Raman scattering (SERS), combining its single-molecule sensitivity and spectral fingerprinting of molecules, and graphene's simple processing and superior uniformity. This enables fast and highly sensitive detection of a wide variety of analytes. Accordingly, GERS has been investigated for a wide variety of sensing applications, including chemical- and bio-sensing. As a derivative of GERS, the use of two-dimensional materials other than graphene for Raman enhancement has emerged, which possess remarkably interesting properties and potential wider applications in combination with GERS. In this review, we first introduce various types of 2D materials, including graphene, MoS₂, doped graphene, their properties, and synthesis. Then, we describe the principles of GERS and comprehensively explain how the GERS enhancement factors are influenced by molecular and 2D material properties. In the last section, we discuss the application of GERS in chemical- and bio-sensing, and the prospects of such a novel sensing method.
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Affiliation(s)
- Alexander Silver
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Hikari Kitadai
- Department of Chemistry, Boston University, Boston, MA 02215, USA.
| | - He Liu
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.
| | | | - Mauricio Terrones
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.
- Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA.
- Department of Materials Science and Engineering and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Xi Ling
- Department of Chemistry, Boston University, Boston, MA 02215, USA.
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA.
- The Photonics Center, Boston University, Boston, MA 02215, USA.
| | - Shengxi Huang
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
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Giaquinto M, Micco A, Aliberti A, Bobeico E, La Ferrara V, Ruvo M, Ricciardi A, Cusano A. Optimization Strategies for Responsivity Control of Microgel Assisted Lab-On-Fiber Optrodes. Sensors (Basel) 2018; 18:E1119. [PMID: 29642392 DOI: 10.3390/s18041119] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/29/2018] [Accepted: 04/03/2018] [Indexed: 12/15/2022]
Abstract
Integrating multi-responsive polymers such as microgels onto optical fiber tips, in a controlled fashion, enables unprecedented functionalities to Lab-on-fiber optrodes. The creation of a uniform microgel monolayer with a specific coverage factor is crucial for enhancing the probes responsivity to a pre-defined target parameter. Here we report a reliable fabrication strategy, based on the dip coating technique, for the controlled realization of microgel monolayer onto unconventional substrates, such as the optical fiber tip. The latter was previously covered by a plasmonic nanostructure to make it sensitive to superficial environment changes. Microgels have been prepared using specific Poly(N-isopropylacrylamide)-based monomers that enable bulky size changes in response to both temperature and pH variations. The formation of the microgel monolayer is efficiently controlled through the selection of suitable operating pH, temperature and concentration of particle dispersions used during the dipping procedure. The effect of each parameter has been evaluated, and the validity of our procedure is confirmed by means of both morphological and optical characterizations. We demonstrate that when the coverage factor exceeds 90%, the probe responsivity to microgels swelling/collapsing is significantly improved. Our study opens new paradigms for the development of engineered microgels assisted Lab-on-Fiber probes for biochemical applications.
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8
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Zuo Y, Zhu X, Shi Y, Liang L, Yang Y. Light Manipulation in Inhomogeneous Liquid Flow and Its Application in Biochemical Sensing. Micromachines (Basel) 2018; 9:mi9040163. [PMID: 30424097 PMCID: PMC6187708 DOI: 10.3390/mi9040163] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/23/2018] [Accepted: 03/26/2018] [Indexed: 02/06/2023]
Abstract
Light manipulation has always been the fundamental subject in the field of optics since centuries ago. Traditional optical devices are usually designed using glasses and other materials, such as semiconductors and metals. Optofluidics is the combination of microfluidics and optics, which brings a host of new advantages to conventional solid systems. The capabilities of light manipulation and biochemical sensing are inherent alongside the emergence of optofluidics. This new research area promotes advancements in optics, biology, and chemistry. The development of fast, accurate, low-cost, and small-sized biochemical micro-sensors is an urgent demand for real-time monitoring. However, the fluid flow in the on-chip sensor is usually non-uniformed, which is a new and emerging challenge for the accuracy of optical detection. It is significant to reveal the principle of light propagation in an inhomogeneous liquid flow and the interaction between biochemical samples and light in flowing liquids. In this review, we summarize the current state of optofluidic lab-on-a-chip techniques from the perspective of light modulation by the unique dynamic properties of fluid in heterogeneous media, such as diffusion, heat transfer, and centrifugation etc. Furthermore, this review introduces several novel photonic phenomena in an inhomogeneous liquid flow and demonstrates their application in biochemical sensing.
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Affiliation(s)
- Yunfeng Zuo
- School of Physics and Technology, Wuhan University, Wuhan 430070, China.
| | - Xiaoqiang Zhu
- School of Physics and Technology, Wuhan University, Wuhan 430070, China.
| | - Yang Shi
- School of Physics and Technology, Wuhan University, Wuhan 430070, China.
| | - Li Liang
- School of Physics and Technology, Wuhan University, Wuhan 430070, China.
| | - Yi Yang
- School of Physics and Technology, Wuhan University, Wuhan 430070, China.
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9
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Shi Y, Guo H, Yang J, Zhao M, Liu J, Xue C, Tang J. Plasma-Induced Wafer-Scale Self-Assembly of Silver Nanoparticles and Application to Biochemical Sensing. Materials (Basel) 2015; 8:3806-3814. [PMID: 28793408 PMCID: PMC5455624 DOI: 10.3390/ma8073806] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 06/09/2015] [Accepted: 06/16/2015] [Indexed: 11/17/2022]
Abstract
In this work, the wafer-scale silver nanoparticles fabricated by a self-assembly method was demonstrated based on a magnetron sputtering and plasma treatment process. Silver nanoparticles of different sizes and shapes were prepared, and the effects of the plasma treatment time, plasma gas composition, and power were systematically investigated to develop a method for low-cost and large-scale fabrication of silver nanoparticles. Furthermore, the surface-enhanced Raman scattering experiments: crystal violet, as the probe, was absorbed on the silver nanoparticles film of different size and density, and get the phenomena of surface-enhanced Raman scattering and surface-enhanced fluorescence. The results show that the proposed technique provides a rapid method for the fabrication of silver nanomaterial; the method is adaptable to large-scale production and is compatible with the fabrication of other materials and biosensors.
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Affiliation(s)
- Yunbo Shi
- Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, Shanxi, China.
- Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, Shanxi, China.
| | - Hao Guo
- Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, Shanxi, China.
- Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, Shanxi, China.
| | - Jiangtao Yang
- Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, Shanxi, China.
- Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, Shanxi, China.
| | - Miaomiao Zhao
- Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, Shanxi, China.
- Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, Shanxi, China.
| | - Jun Liu
- Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, Shanxi, China.
- Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, Shanxi, China.
| | - Chenyang Xue
- Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, Shanxi, China.
- Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, Shanxi, China.
| | - Jun Tang
- Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, Shanxi, China.
- Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, Shanxi, China.
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Caucheteur C, Guo T, Albert J. Review of plasmonic fiber optic biochemical sensors: improving the limit of detection. Anal Bioanal Chem 2015; 407:3883-97. [PMID: 25616701 PMCID: PMC7080100 DOI: 10.1007/s00216-014-8411-6] [Citation(s) in RCA: 462] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 12/02/2014] [Accepted: 12/12/2014] [Indexed: 11/28/2022]
Abstract
This paper presents a brief overview of the technologies used to implement surface plasmon resonance (SPR) effects into fiber-optic sensors for chemical and biochemical applications and a survey of results reported over the last ten years. The performance indicators that are relevant for such systems, such as refractometric sensitivity, operating wavelength, and figure of merit (FOM), are discussed and listed in table form. A list of experimental results with reported limits of detection (LOD) for proteins, toxins, viruses, DNA, bacteria, glucose, and various chemicals is also provided for the same time period. Configurations discussed include fiber-optic analogues of the Kretschmann-Raether prism SPR platforms, made from geometry-modified multimode and single-mode optical fibers (unclad, side-polished, tapered, and U-shaped), long period fiber gratings (LPFG), tilted fiber Bragg gratings (TFBG), and specialty fibers (plastic or polymer, microstructured, and photonic crystal fibers). Configurations involving the excitation of surface plasmon polaritons (SPP) on continuous thin metal layers as well as those involving localized SPR (LSPR) phenomena in nanoparticle metal coatings of gold, silver, and other metals at visible and near-infrared wavelengths are described and compared quantitatively.
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Affiliation(s)
- Christophe Caucheteur
- Electromagnetism and Telecommunication Department, University of Mons, Boulevard Dolez 31, 7000 Mons, Belgium
| | - Tuan Guo
- Institute of Photonics Technology, Jinan University, 601 Huangpu Road West, Guangzhou, 510632 China
| | - Jacques Albert
- Department of Electronics, Carleton University, 1125 Colonel By Drive, Ottawa, K1S 5B6 Canada
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Chiavaioli F, Trono C, Giannetti A, Brenci M, Baldini F. Characterisation of a label-free biosensor based on long period grating. J Biophotonics 2014; 7:312-322. [PMID: 23125124 DOI: 10.1002/jbio.201200135] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 09/11/2012] [Accepted: 10/01/2012] [Indexed: 06/01/2023]
Abstract
Optical fibre gratings, especially long period gratings, have been recently proposed as optical devices for biochemical sensing. A biochemical interaction along the grating portion induces a refractive index change and hence a change in the fiber transmission spectrum. This provides an alternative methodology with respect to other label-free optical approaches, such as surface plasmon resonance, interferometric configurations and optical resonators. The fibre biofunctionalization has been carried out by means of a novel chemistry using Eudragit L100 copolymer as opposed to the commonly used silanization procedure. Antigen-antibody interaction has been analysed by means of an IgG/anti-IgG bioassay. The biosensor was fully characterised, monitoring the kinetics during the antibody immobilization and the antigen interaction and achieving the calibration curve of the assay. A comparison of the biosensor performance was made by using two different long period gratings with distinct periods.
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