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Pan T, Lu D, Xin H, Li B. Biophotonic probes for bio-detection and imaging. LIGHT, SCIENCE & APPLICATIONS 2021; 10:124. [PMID: 34108445 PMCID: PMC8190087 DOI: 10.1038/s41377-021-00561-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/10/2021] [Accepted: 05/21/2021] [Indexed: 05/08/2023]
Abstract
The rapid development of biophotonics and biomedical sciences makes a high demand on photonic structures to be interfaced with biological systems that are capable of manipulating light at small scales for sensitive detection of biological signals and precise imaging of cellular structures. However, conventional photonic structures based on artificial materials (either inorganic or toxic organic) inevitably show incompatibility and invasiveness when interfacing with biological systems. The design of biophotonic probes from the abundant natural materials, particularly biological entities such as virus, cells and tissues, with the capability of multifunctional light manipulation at target sites greatly increases the biocompatibility and minimizes the invasiveness to biological microenvironment. In this review, advances in biophotonic probes for bio-detection and imaging are reviewed. We emphatically and systematically describe biological entities-based photonic probes that offer appropriate optical properties, biocompatibility, and biodegradability with different optical functions from light generation, to light transportation and light modulation. Three representative biophotonic probes, i.e., biological lasers, cell-based biophotonic waveguides and bio-microlenses, are reviewed with applications for bio-detection and imaging. Finally, perspectives on future opportunities and potential improvements of biophotonic probes are also provided.
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Affiliation(s)
- Ting Pan
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Dengyun Lu
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Hongbao Xin
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China.
| | - Baojun Li
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China.
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Desalvo A, Bateman F, James E, Morgan H, Elliott T. Time-resolved microwell cell-pairing array reveals multiple T cell activation profiles. LAB ON A CHIP 2020; 20:3772-3783. [PMID: 32902549 DOI: 10.1039/d0lc00628a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The differences in behaviour between individual cells in a large population are often important, yet are masked in bulk analyses where only average parameters are measured. One unresolved question in the field of immunology is the extent to which important immunological phenomena such as immunodominance to cancer antigens correlates with the average activity of a population of antigen-specific T lymphocytes, or with the activity of individual "outlier" cells. Despite progress in single cell technologies, few platforms are available that can deliver time-resolved, functional analysis at single cell resolution, for these investigations. We have developed an accessible high-throughput platform to measure single T cell signalling in real time following time-controlled stimulation by live antigen presenting cells. The cell-trap array consists of thousands of individual microwells cast in an agarose block, which is biocompatible and permeable to nutrients. Single T cells are isolated in wells via passive sedimentation and size exclusion, achieving up to 90% occupancy. The device enables simultaneous activation of thousands of single CD8+ cells. Stimulation with soluble reagents (ionomycin, anti-CD3 antibodies) or antigen presenting cells leads to changes in intracellular calcium concentrations which were measured using calcium-chelating fluorophore dyes. The platform was used to demonstrate a range of activation profiles among individual cells of a cloned, antigen specific CD8+ T cell hybridoma in response to both nonspecific stimuli and specific, physiologically relevant antigen stimulation. The presence of two different activation profiles was demonstrated, together with rare outlier behaviour among cells that are essentially clonal.
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Affiliation(s)
- Anna Desalvo
- Centre for Cancer Immunology, University of Southampton, Southampton, UK.
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3
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Xin H, Li Y, Liu YC, Zhang Y, Xiao YF, Li B. Optical Forces: From Fundamental to Biological Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001994. [PMID: 32715536 DOI: 10.1002/adma.202001994] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/22/2020] [Indexed: 05/06/2023]
Abstract
Optical forces, generally arising from changes of field gradients or linear momentum carried by photons, form the basis for optical trapping and manipulation. Advances in optical forces help to reveal the nature of light-matter interactions, giving answers to a wide range of questions and solving problems across various disciplines, and are still yielding new insights in many exciting sciences, particularly in the fields of biological technology, material applications, and quantum sciences. This review focuses on recent advances in optical forces, ranging from fundamentals to applications for biological exploration. First, the basics of different types of optical forces with new light-matter interaction mechanisms and near-field techniques for optical force generation beyond the diffraction limit with nanometer accuracy are described. Optical forces for biological applications from in vitro to in vivo are then reviewed. Applications from individual manipulation to multiple assembly into functional biophotonic probes and soft-matter superstructures are discussed. At the end future directions for application of optical forces for biological exploration are provided.
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Affiliation(s)
- Hongbao Xin
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Yuchao Li
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Yong-Chun Liu
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, 100084, China
| | - Yao Zhang
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Yun-Feng Xiao
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006, China
- Peking University Yangtze Delta Institute of Optoelectronics, Nantong, Jiangsu, 226010, China
| | - Baojun Li
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
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Loo JFC, Ho HP, Kong SK, Wang TH, Ho YP. Technological Advances in Multiscale Analysis of Single Cells in Biomedicine. ACTA ACUST UNITED AC 2019; 3:e1900138. [PMID: 32648696 DOI: 10.1002/adbi.201900138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/25/2019] [Indexed: 12/20/2022]
Abstract
Single-cell analysis has recently received significant attention in biomedicine. With the advances in super-resolution microscopy, fluorescence labeling, and nanoscale biosensing, new information may be obtained for the design of cancer diagnosis and therapeutic interventions. The discovery of cellular heterogeneity further stresses the importance of single-cell analysis to improve our understanding of disease mechanism and to develop new strategies for disease treatment. To this end, many studies are exploited at the single-cell level for high throughput, highly parallel, and quantitative analysis. Technically, microfluidics are also designed to facilitate single-cell isolation and enrichment for downstream detection and manipulation in a robust, sensitive, and automated manner. Further achievements are made possible by consolidating optically label-free, electrical, and molecular sensing techniques. Moreover, these technologies are coupled with computing algorithms for high throughput and automated quantitative analysis with a short turnaround time. To reflect on how the technological developments have advanced single-cell analysis, this mini-review is aimed to offer readers an introduction to single-cell analysis with a brief historical development and the recent progresses that have enabled multiscale analysis of single-cells in the last decade. The challenges and future trends are also discussed with the view to inspire forthcoming technical developments.
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Affiliation(s)
- Jacky Fong-Chuen Loo
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR.,Biochemistry Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
| | - Ho Pui Ho
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
| | - Siu Kai Kong
- Biochemistry Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
| | - Tza-Huei Wang
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA.,Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Yi-Ping Ho
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR.,Centre for Novel Biomaterials, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
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5
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Zhang C, Xu B, Gong C, Luo J, Zhang Q, Gong Y. Fiber Optofluidic Technology Based on Optical Force and Photothermal Effects. MICROMACHINES 2019; 10:E499. [PMID: 31357458 PMCID: PMC6722967 DOI: 10.3390/mi10080499] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 07/08/2019] [Accepted: 07/19/2019] [Indexed: 02/06/2023]
Abstract
Optofluidics is an exciting new area of study resulting from the fusion of microfluidics and photonics. It broadens the application and extends the functionality of microfluidics and has been extensively investigated in biocontrol, molecular diagnosis, material synthesis, and drug delivery. When light interacts with a microfluidic system, optical force and/or photothermal effects may occur due to the strong interaction between light and liquid. Such opto-physical effects can be used for optical manipulation and sensing due to their unique advantages over conventional microfluidics and photonics, including their simple fabrication process, flexible manipulation capability, compact configuration, and low cost. In this review, we summarize the latest progress in fiber optofluidic (FOF) technology based on optical force and photothermal effects in manipulation and sensing applications. Optical force can be used for optofluidic manipulation and sensing in two categories: stable single optical traps and stable combined optical traps. The photothermal effect can be applied to optofluidics based on two major structures: optical microfibers and optical fiber tips. The advantages and disadvantages of each FOF technology are also discussed.
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Affiliation(s)
- Chenlin Zhang
- Science and Technology on Security Communication Laboratory, Institute of Southwestern Communication, Chengdu 610041, China
| | - Bingjie Xu
- Science and Technology on Security Communication Laboratory, Institute of Southwestern Communication, Chengdu 610041, China.
| | - Chaoyang Gong
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jingtang Luo
- State Grid Sichuan Economic Research Institute, Chengdu 610041, China
| | - Quanming Zhang
- State Grid Sichuan Economic Research Institute, Chengdu 610041, China
| | - Yuan Gong
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.
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Investigation of optical force on magnetic nanoparticles with magnetic-fluid-filled Fabry-Perot interferometer. Sci Rep 2018; 8:12352. [PMID: 30120286 PMCID: PMC6097994 DOI: 10.1038/s41598-018-30092-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 07/24/2018] [Indexed: 11/08/2022] Open
Abstract
The optical force acting on the magnetic nanoparticles (MNPs) is investigated with the magnetic-fluid-filled fiber-optic Fabry-Perot interferometer. The shift of interference spectra is related with the local refractive index variation in the light path, which is assigned to the optical-force-induced outward movement of MNPs. The influence of magnetic fluid’s viscosity, ambient temperature, strength and orientation of the externally applied magnetic field on the optical-force-induced MNPs’ movement is studied in details. The results of this work provide a further understanding of interaction between light and MNPs and clarify the dynamic micro-processes of MNPs within magnetic fluid under external stimuli. It may have the potentials in the fields of light-controllable magnetic-fluid-based devices and vector magnetic field detection.
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Optical fiber tips for biological applications: From light confinement, biosensing to bioparticles manipulation. Biochim Biophys Acta Gen Subj 2018; 1862:1209-1246. [DOI: 10.1016/j.bbagen.2018.02.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/26/2018] [Accepted: 02/13/2018] [Indexed: 12/15/2022]
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Wu C, Chen R, Liu Y, Yu Z, Jiang Y, Cheng X. A planar dielectrophoresis-based chip for high-throughput cell pairing. LAB ON A CHIP 2017; 17:4008-4014. [PMID: 29115319 DOI: 10.1039/c7lc01082f] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This paper reports the design and fabrication of a planar chip for high-throughput cell trapping and pairing (more than 2400 single cell-cell pairs in a microwell array) in a 1 × 1.5 cm area by positive dielectrophoresis (p-DEP) within only several minutes. The p-DEP was generated by applying an alternating current signal on a novel two-pair interdigitated array (TPIDA) electrode. The TPIDA electrode not only enabled the planar chip to be incorporated with a most often used PDMS microfluidic channel, but also contributed to a high single cell-cell pairing efficiency up to 74.2% by decreasing the induced electric field during consecutive p-DEP trapping of two cell types. Furthermore, the paired cells in each microwell could be "pushed" together into a microbaffle by a liquid flow through a capillary-sized channel, resulting in single cell-cell contact. More importantly, the planar chip could be used repeatedly by a simple water cleaning process. The planar chip offers an effective way for high-throughput single cell-cell pairing, which could provide a facile platform for cell communication and a precise cell pairing step in cell fusion.
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Affiliation(s)
- ChunHui Wu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China.
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9
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Xin H, Li Y, Xu D, Zhang Y, Chen CH, Li B. Single Upconversion Nanoparticle-Bacterium Cotrapping for Single-Bacterium Labeling and Analysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1603418. [PMID: 28092436 DOI: 10.1002/smll.201603418] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 12/08/2016] [Indexed: 05/24/2023]
Abstract
Detecting and analyzing pathogenic bacteria in an effective and reliable manner is crucial for the diagnosis of acute bacterial infection and initial antibiotic therapy. However, the precise labeling and analysis of bacteria at the single-bacterium level are a technical challenge but very important to reveal important details about the heterogeneity of cells and responds to environment. This study demonstrates an optical strategy for single-bacterium labeling and analysis by the cotrapping of single upconversion nanoparticles (UCNPs) and bacteria together. A single UCNP with an average size of ≈120 nm is first optically trapped. Both ends of a single bacterium are then trapped and labeled with single UCNPs emitting green light. The labeled bacterium can be flexibly moved to designated locations for further analysis. Signals from bacteria of different sizes are detected in real time for single-bacterium analysis. This cotrapping method provides a new approach for single-pathogenic-bacterium labeling, detection, and real-time analysis at the single-particle and single-bacterium level.
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Affiliation(s)
- Hongbao Xin
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
- Biomedical Institute for Global Healthcare Research and Technology (BIGHEART), National University of Singapore, MD6, 14 Medical Drive, 14-01, Singapore, 117599, Singapore
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, Engineering Block 4, 04-08, Singapore, 117583, Singapore
| | - Yuchao Li
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Dekang Xu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yueli Zhang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Chia-Hung Chen
- Biomedical Institute for Global Healthcare Research and Technology (BIGHEART), National University of Singapore, MD6, 14 Medical Drive, 14-01, Singapore, 117599, Singapore
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, Engineering Block 4, 04-08, Singapore, 117583, Singapore
| | - Baojun Li
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
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Chen J, Cong H, Loo J, Kang Z, Tang M, Zhang H, Wu SY, Kong SK, Ho HP. Thermal gradient induced tweezers for the manipulation of particles and cells. Sci Rep 2016; 6:35814. [PMID: 27853191 PMCID: PMC5113121 DOI: 10.1038/srep35814] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 10/06/2016] [Indexed: 11/09/2022] Open
Abstract
Optical tweezers are a well-established tool for manipulating small objects. However, their integration with microfluidic devices often requires an objective lens. More importantly, trapping of non-transparent or optically sensitive targets is particularly challenging for optical tweezers. Here, for the first time, we present a photon-free trapping technique based on electro-thermally induced forces. We demonstrate that thermal-gradient-induced thermophoresis and thermal convection can lead to trapping of polystyrene spheres and live cells. While the subject of thermophoresis, particularly in the micro- and nano-scale, still remains to be fully explored, our experimental results have provided a reasonable explanation for the trapping effect. The so-called thermal tweezers, which can be readily fabricated by femtosecond laser writing, operate with low input power density and are highly versatile in terms of device configuration, thus rendering high potential for integration with microfluidic devices as well as lab-on-a-chip systems.
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Affiliation(s)
- Jiajie Chen
- Department of Electronic Engineering, The Chinese University of
Hong Kong, Shatin, N.T., Hong Kong SAR,
China
| | - Hengji Cong
- Department of Electronic Engineering, The Chinese University of
Hong Kong, Shatin, N.T., Hong Kong SAR,
China
| | - Jacky Loo
- Department of Electronic Engineering, The Chinese University of
Hong Kong, Shatin, N.T., Hong Kong SAR,
China
- Biochemistry Programme, School of Life Sciences, The Chinese
University of Hong Kong, Shatin, N.T., Hong Kong SAR,
China
| | - Zhiwen Kang
- Department of Electronic Engineering, The Chinese University of
Hong Kong, Shatin, N.T., Hong Kong SAR,
China
| | - Minghui Tang
- Department of Electronic Engineering, The Chinese University of
Hong Kong, Shatin, N.T., Hong Kong SAR,
China
| | - Haixi Zhang
- Department of Electronic Engineering, The Chinese University of
Hong Kong, Shatin, N.T., Hong Kong SAR,
China
| | - Shu-Yuen Wu
- Department of Electronic Engineering, The Chinese University of
Hong Kong, Shatin, N.T., Hong Kong SAR,
China
| | - Siu-Kai Kong
- Biochemistry Programme, School of Life Sciences, The Chinese
University of Hong Kong, Shatin, N.T., Hong Kong SAR,
China
| | - Ho-Pui Ho
- Department of Electronic Engineering, The Chinese University of
Hong Kong, Shatin, N.T., Hong Kong SAR,
China
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Pang L, Liu W, Tian C, Xu J, Li T, Chen SW, Wang J. Construction of single-cell arrays and assay of cell drug resistance in an integrated microfluidic platform. LAB ON A CHIP 2016; 16:4612-4620. [PMID: 27785515 DOI: 10.1039/c6lc01000h] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The cellular heterogeneity of tumors has played important roles in various tumor-related research areas and applications such as the cellular biology, metastasis and clinical diagnosis of tumors. Although several microfluidics-based single-cell separation and analysis techniques have been used in research into the cellular heterogeneity of tumors, further investigation is still required for studying the effect of the biomechanical (e.g., size and deformability) heterogeneity of cells on their biological characteristics (e.g., drug resistance and tumor-initiating features). Here, we established an integrated microfluidic platform for the construction of single-cell arrays and analysis of drug resistance. Using this device, high-throughput single-cell arrays could be easily obtained according to the biomechanical (size and deformability) heterogeneity of cells. To demonstrate the capability of the microfluidic platform, a proof-of-concept experiment was implemented by determining the vincristine resistance of single glioblastoma cells with different biomechanical properties. The results indicated that the biomechanics of tumor cells had significant implications for cell drug resistance; that is, small and/or more deformable tumor cells had higher drug resistance than large and/or less deformable tumor cells. This device provides a new approach for the isolation of single cells according to the different biomechanical properties of cells. Also, it possesses practical potential for studies of tumors on a single-cell level.
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Affiliation(s)
- Long Pang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Wenming Liu
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chang Tian
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Juan Xu
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Tianbao Li
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shu-Wei Chen
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jinyi Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China. and College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China
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Sadeghi J, Ghasemi AHB, Latifi H. A label-free infrared opto-fluidic method for real-time determination of flow rate and concentration with temperature cross-sensitivity compensation. LAB ON A CHIP 2016; 16:3957-3968. [PMID: 27714025 DOI: 10.1039/c6lc00748a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The ability to accurately measure the flow rate, concentration, and temperature in real-time in micro total analysis systems (μTAS) is crucial when improving their practical sensing capabilities within extremely small volumes. Our label-free infrared (1500-1600 nm) opto-fluidic method, presented in this study, utilizes a cantilever-based flow meter integrated with two parallel optical fiber Fabry-Perot interferometers (FPIs). The first FPI serves as an ultra-sensitive flow meter and includes a Fiber Bragg Grating (FBG) tip for localized temperature sensing. The second FPI has a fabricated photopolymer micro-tip for highly sensitive refractive index (RI) determination. In this work, we performed 3-D simulation analysis to characterize cantilever deflection as well as temperature distribution and its effect on the RI. The experimental results from temperature cross-sensitivity analysis lead to real-time measurement resolutions of 5 nL min-1, 1 × 10-6 RIU and 0.05 °C, for the flow rate, refractive index, and temperature, respectively.
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Affiliation(s)
- Jalal Sadeghi
- Laser & Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983963113, Iran.
| | - Amir Hossein Baradaran Ghasemi
- Laser & Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983963113, Iran. and Department of Physics, Shahid Beheshti University, Evin, Tehran 1983963113, Iran
| | - Hamid Latifi
- Laser & Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983963113, Iran. and Department of Physics, Shahid Beheshti University, Evin, Tehran 1983963113, Iran
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Zhao L, Ma C, Shen S, Tian C, Xu J, Tu Q, Li T, Wang Y, Wang J. Pneumatic microfluidics-based multiplex single-cell array. Biosens Bioelectron 2016; 78:423-430. [DOI: 10.1016/j.bios.2015.09.055] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/19/2015] [Accepted: 09/24/2015] [Indexed: 12/23/2022]
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14
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Liu X, Huang J, Zhang Y, Li B. Optical regulation of cell chain. Sci Rep 2015; 5:11578. [PMID: 26098707 PMCID: PMC4476432 DOI: 10.1038/srep11578] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 05/29/2015] [Indexed: 01/09/2023] Open
Abstract
Formation of cell chains is a straightforward and efficient method to study the cell interaction. By regulating the contact sequence and interaction distance, the influence of different extracellular cues on the cell interaction can be investigated. However, it faces great challenges in stable retaining and precise regulation of cell chain, especially in cell culture with relatively low cell concentration. Here we demonstrated an optical method to realize the precise regulation of cell chain, including removing or adding a single cell, adjusting interaction distance, and changing cell contact sequence. After injecting a 980-nm wavelength laser beam into a tapered optical fiber probe (FP), a cell chain of Escherichia colis (E. colis) is formed under the optical gradient force. By manipulating another FP close to the cell chain, a targeted E. coli cell can be trapped by the FP and removed from the chain. Further, the targeted cell can be added back to the chain at different positions to change the cell contact sequence. The experiments were interpreted by numerical simulations and the impact of cell sizes and shapes on this method was analyzed.
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Affiliation(s)
- Xiaoshuai Liu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Jianbin Huang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Yao Zhang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Baojun Li
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
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15
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Non-contact fiber-optical trapping of motile bacteria: dynamics observation and energy estimation. Sci Rep 2014; 4:6576. [PMID: 25300713 PMCID: PMC4192617 DOI: 10.1038/srep06576] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 09/15/2014] [Indexed: 12/22/2022] Open
Abstract
The dynamics and energy conversion of bacteria are strongly associated with bacterial activities, such as survival, spreading of bacterial diseases and their pathogenesis. Although different discoveries have been reported on trapped bacteria (i.e. immobilized bacteria), the investigation on the dynamics and energy conversion of motile bacteria in the process of trapping is highly desirable. Here, we report a non-contact optical trapping of motile bacteria using a modified tapered optical fiber. Using Escherichia coli as an example, both single and multiple motile bacteria have been trapped and manipulated in a non-contact manner. Bacterial dynamics has been observed and bacterial energy has been estimated in the trapping process. This non-contact optical trapping provides a new opportunity for better understanding the bacterial dynamics and energy conversion at the single cell level.
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16
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Cheng C, Xu X, Lei H, Li B. Manipulation of ZnO nanowires using a tapered fiber probe. RSC Adv 2014. [DOI: 10.1039/c4ra02661f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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