1
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Morikawa K, Takeuchi T, Kitamori T. Local nano-electrode fabrication utilizing nanofluidic and nano-electrochemical control. Electrophoresis 2024. [PMID: 38962855 DOI: 10.1002/elps.202300002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 05/23/2024] [Accepted: 06/19/2024] [Indexed: 07/05/2024]
Abstract
Miniaturized systems have attracted much attention with the recent advances in microfluidics and nanofluidics. From the capillary electrophoresis, the development of glass-based microfluidic and nanofluidic technologies has supported advances in microfluidics and nanofluidics. Most microfluidic systems, especially nanofluidic systems, are still simple, such as systems constructed with simple straight nanochannels and bulk-scale electrodes. One of the bottlenecks to the development of more complicated and sophisticated systems is to develop the locally integrated nano-electrodes. However, there are still issues with integrating nano-electrodes into nanofluidic devices because it is difficult to fit the nano-electrode size into a nanofluidic channel at the nanometer level. In this study, we propose a new method for the fabrication of local nano-electrodes in nanofluidic devices with nanofluidic and nano-electrochemistry-based experiments. An electroplating solution was introduced to a nanochannel with control of the flow and the electroplating reaction, by which nano-electrodes were successfully fabricated. In addition, a nanofluidic device was available for nanofluidic experiments with the application of 200 kPa. This method can be applied to any electroplating material such as gold and copper. The local nano-electrode will make a significant contribution to the development of more complicated and sophisticated nanofluidic electrophoresis systems and to local electric detection methods for various nanofluidic devices.
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Affiliation(s)
- Kyojiro Morikawa
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Tomoaki Takeuchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Takehiko Kitamori
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo, Japan
- Institute of Nanoengineering and Microsystems, Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan
- Collaborative Research Organization for Micro and Nano Multifunctional Devices, The University of Tokyo, Tokyo, Japan
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2
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Cui Y, Ying C, Huang XY, Ye Q, Tian J, Liu Z. Electrical Transport and Dynamics of Confined DNA through Highly Conductive 2D Graphene Nanochannels. NANO LETTERS 2024; 24:4485-4492. [PMID: 38578031 DOI: 10.1021/acs.nanolett.4c00403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Confining DNA in nanochannels is an important approach to studying its structure and transportation dynamics. Graphene nanochannels are particularly attractive for studying DNA confinement due to their atomic flatness, precise height control, and excellent mechanical strength. Here, using femtosecond laser etching and wetting transfer, we fabricate graphene nanochannels down to less than 4.3 nm in height, with the length-to-height ratios up to 103. These channels exhibit high stability, low noise, and self-cleaning ability during the long-term ionic current recording. We report a clear linear relationship between DNA length and the residence time in the channel and further utilize this relationship to differentiate DNA fragments based on their lengths, ranging widely from 200 bps to 48.5 kbps. The graphene nanochannel presented here provides a potential platform for label-free analyses and reveals fundamental insights into the conformational dynamics of DNA and proteins in confined space.
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Affiliation(s)
- Yangjun Cui
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China
| | - Cuifeng Ying
- Advanced Optics & Photonics Laboratory, Department of Engineering, School of Science & Technology, Nottingham Trent University, Nottingham NG11 8NS, U.K
| | - Xiao-Yu Huang
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China
| | - Qing Ye
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China
| | - Jianguo Tian
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China
- Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300071, China
| | - Zhibo Liu
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China
- Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300071, China
- The Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
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3
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Dang Z, Jiang Y, Su X, Wang Z, Wang Y, Sun Z, Zhao Z, Zhang C, Hong Y, Liu Z. Particle Counting Methods Based on Microfluidic Devices. MICROMACHINES 2023; 14:1722. [PMID: 37763885 PMCID: PMC10534595 DOI: 10.3390/mi14091722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/30/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023]
Abstract
Particle counting serves as a pivotal constituent in diverse analytical domains, encompassing a broad spectrum of entities, ranging from blood cells and bacteria to viruses, droplets, bubbles, wear debris, and magnetic beads. Recent epochs have witnessed remarkable progressions in microfluidic chip technology, culminating in the proliferation and maturation of microfluidic chip-based particle counting methodologies. This paper undertakes a taxonomical elucidation of microfluidic chip-based particle counters based on the physical parameters they detect. These particle counters are classified into three categories: optical-based counters, electrical-based particle counters, and other counters. Within each category, subcategories are established to consider structural differences. Each type of counter is described not only in terms of its working principle but also the methods employed to enhance sensitivity and throughput. Additionally, an analysis of future trends related to each counter type is provided.
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Affiliation(s)
- Zenglin Dang
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China; (Z.D.); (Y.J.); (X.S.); (Y.W.); (Z.S.); (Z.Z.); (Y.H.)
| | - Yuning Jiang
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China; (Z.D.); (Y.J.); (X.S.); (Y.W.); (Z.S.); (Z.Z.); (Y.H.)
| | - Xin Su
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China; (Z.D.); (Y.J.); (X.S.); (Y.W.); (Z.S.); (Z.Z.); (Y.H.)
| | - Zhihao Wang
- College of Marine Electrical Engineering, Dalian Maritime University, Dalian 116026, China;
| | - Yucheng Wang
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China; (Z.D.); (Y.J.); (X.S.); (Y.W.); (Z.S.); (Z.Z.); (Y.H.)
| | - Zhe Sun
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China; (Z.D.); (Y.J.); (X.S.); (Y.W.); (Z.S.); (Z.Z.); (Y.H.)
| | - Zheng Zhao
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China; (Z.D.); (Y.J.); (X.S.); (Y.W.); (Z.S.); (Z.Z.); (Y.H.)
| | - Chi Zhang
- College of Transportation Engineering, Dalian Maritime University, Dalian 116026, China;
| | - Yuming Hong
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China; (Z.D.); (Y.J.); (X.S.); (Y.W.); (Z.S.); (Z.Z.); (Y.H.)
| | - Zhijian Liu
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China; (Z.D.); (Y.J.); (X.S.); (Y.W.); (Z.S.); (Z.Z.); (Y.H.)
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4
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Abstract
Resistive pulse sensors have been used to characterise everything from whole cells to small molecules. Their integration into microfluidic devices has simplified sample handling whilst increasing throughput. Typically, these devices measure a limited size range, making them prone to blockages in complex sample matrixes. To prolong their life and facilitate their use, samples are often filtered or prepared to match the sample with the sensor diameter. Here, we advance our tuneable flow resistive pulse sensor which utilises additively manufactured parts. The sensor allows parts to be easily changed, washed and cleaned, its simplicity and versatility allow components from existing nanopore fabrication techniques such as glass pipettes to be integrated into a single device. This creates a multi-nanopore sensor that can simultaneously measure particles from 0.1 to 30 μm in diameter. The orientation and controlled fluid flow in the device allow the sensors to be placed in series, whereby smaller particles can be measured in the presence of larger ones without the risk of being blocked. We illustrate the concept of a multi-pore flow resistive pulse sensor, by combining an additively manufactured tuneable sensor, termed sensor 1, with a fixed nanopore sensor, termed sensor 2. Sensor 1 measures particles as small as 10 μm in diameter, whilst sensor 2 can be used to characterise particles as small as 100 nm, depending upon its dimensions. We illustrate the dual pore sensor by measuring 1 and 10 μm particles simultaneously.
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Affiliation(s)
- Marcus Pollard
- School of Science, Loughborough University, Epinal Way, LE11 3TU, UK.
| | - Rushabh Maugi
- School of Science, Loughborough University, Epinal Way, LE11 3TU, UK.
| | - Mark Platt
- School of Science, Loughborough University, Epinal Way, LE11 3TU, UK.
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5
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Verma N, Walia S, Pandya A. Micro/nanofluidic devices for DNA/RNA detection and separation. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2022; 186:85-107. [PMID: 35033291 DOI: 10.1016/bs.pmbts.2021.07.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The development and research have ramped up at a greater speed than ever in the field of diseases diagnosis. Still there is struggle in developing early detection techniques which uses complex biomolecules like RNA, DNA and proteins in order to detect diseases caused by bacteria, viruses or fungi. Until now separation techniques used before detection rely on traditional techniques like electrophoresis etc. which often require centralized services. Although efforts are made in developing devices that is capable enough on carrying out separation and detection based on microfluidic (MF) and nanofluidic (NF) or lab on chip. Hence, in this chapter, we have discussed about the advancement, limitations and future steps that needs to be taken to flourish the field of NF and MF for the detection and separation of nucleic acid.
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Affiliation(s)
- Nidhi Verma
- Department of Engineering and Physical Sciences, Institute of Advanced Research, Gandhinagar, Gujarat, India
| | - Sakshi Walia
- Department of Biological Sciences and Biotechnology, Institute of Advanced Research, Gandhinagar, India
| | - Alok Pandya
- Department of Engineering and Physical Sciences, Institute of Advanced Research, Gandhinagar, Gujarat, India.
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Birkin PR, Youngs JJ, Truscott TT, Martini S. Development of an optical flow through detector for bubbles, crystals and particles in oils. Phys Chem Chem Phys 2021; 24:1544-1552. [PMID: 34940769 DOI: 10.1039/d1cp03655f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The characterisation of bubbles or particles in an oil poses some unique challenges. In contrast to water solutions, the use of electrochemical detection approaches is more difficult in an oil. However, optical sensing systems have considerable potential in this area. Here we use a flow through channel approach and monitor the light propagation through this structure in an optical transmission sensor arrangement (OTS). This simple approach is demonstrated to be useful at detecting bubbles produced in the oil as a result of cavitation induced by high intensity ultrasound (HIU). The optical technique is shown to have an analytical basis. Bubble detection from an operating HIU source is shown to depend on position of the sensor with respect to the source. Critically, the bubble population can be followed for extended time periods after the ultrasonic source has been terminated. The detection of crystals is also demonstrated. Hence, this technique is ideal for the study of the effects of HIU on oils as they crystallise over extended time periods.
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Affiliation(s)
- Peter R Birkin
- Department of Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
| | - Jack J Youngs
- Department of Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
| | - Tadd T Truscott
- Department of Mechanical and Aerospace Engineering, Utah State University, Logan, UT, 84322-4130, USA
| | - Silvana Martini
- Department of Nutrition, Dietetics, and Food Sciences, Utah State University, Logan, UT, 84322-8700, USA
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7
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Zhang D, Zhang X. Bioinspired Solid-State Nanochannel Sensors: From Ionic Current Signals, Current, and Fluorescence Dual Signals to Faraday Current Signals. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100495. [PMID: 34117705 DOI: 10.1002/smll.202100495] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/21/2021] [Indexed: 06/12/2023]
Abstract
Inspired from bioprotein channels of living organisms, constructing "abiotic" analogues, solid-state nanochannels, to achieve "smart" sensing towards various targets, is highly seductive. When encountered with certain stimuli, dynamic switch of terminal modified probes in terms of surface charge, conformation, fluorescence property, electric potential as well as wettability can be monitored via transmembrane ionic current, fluorescence intensity, faraday current signals of nanochannels and so on. Herein, the modification methodologies of nanochannels and targets-detecting application are summarized in ions, small molecules, as well as biomolecules, and systematically reviewed are the nanochannel-based detection means including 1) by transmembrane current signals; 2) by the coordination of current- and fluorescence-dual signals; 3) by faraday current signals from nanochannel-based electrode. The coordination of current and fluorescence dual signals offers great benefits for synchronous temporal and spatial monitoring. Faraday signals enable the nanoelectrode to monitor both redox and non-redox components. Notably, by incorporation with confined effect of tip region of a needle-like nanopipette, glorious in-vivo monitoring is conferred on the nanopipette detector at high temporal-spatial resolution. In addition, some outlooks for future application in reliable practical samples analysis and leading research endeavors in the related fantastic fields are provided.
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Affiliation(s)
- Dan Zhang
- Cancer Centre and Centre of Reproduction, Development and Aging, Faculty of Health Sciences, University of Macau, Macau, SAR, 999078, China
| | - Xuanjun Zhang
- Cancer Centre and Centre of Reproduction, Development and Aging, Faculty of Health Sciences, University of Macau, Macau, SAR, 999078, China
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8
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Han Z, Liu J, Liu Z, Pan W, Yang Y, Chen X, Gao Y, Duan X. Resistive pulse sensing device with embedded nanochannel (nanochannel-RPS) for label-free biomolecule and bionanoparticle analysis. NANOTECHNOLOGY 2021; 32:295507. [PMID: 33823494 DOI: 10.1088/1361-6528/abf510] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
This paper reports an IC-compatible method for fabricating a PDMS-based resistive pulse sensing (RPS) device with embedded nanochannel (nanochannel-RPS) for label-free analysis of biomolecules and bionanoparticles, such as plasmid DNAs and exosomes. Here, a multilayer lithography process was proposed to fabricate the PDMS mold for the microfluidic device, comprising a bridging nanochannel, as the sensing gate. RPS was performed by placing the sensing and excitation electrodes symmetrically upstream and downstream of the sensing gate. In order to reduce the noise level, a reference electrode was designed and placed beside the excitation electrode. To demonstrate the feasibility of the proposed nanochannel-RPS device and sensing system, polystyrene micro- and nanoparticles with diameters of 1μm and 300 nm were tested by the proposed device with signal-to-noise ratios (SNR) ranging from 9.1-30.5 and 2.2-5.9, respectively. Furthermore, a nanochannel with height of 300 nm was applied for 4 kb plasmid DNA detection, implying the potential of the proposed method for label-free quantification of nanoscale biomolecules. Moreover, HeLa cell exosomes, known as a well-studied subtype of extracellular vesicles, were measured and analyzed by their size distribution. The result of the resistive pulse amplitude corresponded well to that of nanoparticle tracking analysis (NTA). The proposed nanochannel-RPS device and the sensing strategy are not only capable of label-free analysis for nanoscale biomolecules and bionanoparticles, but are also cost-effective for large-scale manufacturing.
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Affiliation(s)
- Ziyu Han
- State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China
| | - Jiantao Liu
- State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China
- Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, People's Republic of China
| | - Zhanning Liu
- State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China
- Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, People's Republic of China
| | - Wenwei Pan
- State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China
| | - Yang Yang
- State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China
| | - Xuejiao Chen
- State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China
| | - Yunhua Gao
- Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, People's Republic of China
| | - Xuexin Duan
- State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China
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9
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Nakajima K, Nakatsuka R, Tsuji T, Doi K, Kawano S. Synchronized resistive-pulse analysis with flow visualization for single micro- and nanoscale objects driven by optical vortex in double orifice. Sci Rep 2021; 11:9323. [PMID: 33927219 PMCID: PMC8085213 DOI: 10.1038/s41598-021-87822-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 03/15/2021] [Indexed: 11/09/2022] Open
Abstract
Resistive-pulse analysis is a powerful tool for identifying micro- and nanoscale objects. For low-concentration specimens, the pulse responses are rare, and it is difficult to obtain a sufficient number of electrical waveforms to clearly characterize the targets and reduce noise. In this study, we conducted a periodic resistive-pulse analysis using an optical vortex and a double orifice, which repetitively senses a single micro- or nanoscale target particle with a diameter ranging from 700 nm to 2 \documentclass[12pt]{minimal}
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\begin{document}$$\mu$$\end{document}μm. The periodic motion results in the accumulation of a sufficient number of waveforms within a short period. Acquired pulses show periodic ionic-current drops associated with the translocation events through each orifice. Furthermore, a transparent fluidic device allows us to synchronously average the waveforms by the microscopic observation of the translocation events and improve the signal-to-noise ratio. By this method, we succeed in distinguishing single particle diameters. Additionally, the results of measured signals and the simultaneous high-speed observations are used to quantitatively and systematically discuss the effect of the complex fluid flow in the orifices on the amplitude of the resistive pulse. The synchronized resistive-pulse analysis by the optical vortex with the flow visualization improves the pulse-acquisition rate for a single specific particle and accuracy of the analysis, refining the micro- and nanoscale object identification.
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Affiliation(s)
- Kichitaro Nakajima
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
| | - Ryoji Nakatsuka
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
| | - Tetsuro Tsuji
- Graduate School of Informatics, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Kentaro Doi
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
| | - Satoyuki Kawano
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan.
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10
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Seo S, Ha D, Kim T. Evaporation-driven transport-control of small molecules along nanoslits. Nat Commun 2021; 12:1336. [PMID: 33637759 PMCID: PMC7910579 DOI: 10.1038/s41467-021-21584-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 01/24/2021] [Indexed: 11/10/2022] Open
Abstract
Understanding and controlling the transport mechanisms of small molecules at the micro/nanoscales is vital because they provide a working principle for a variety of practical micro/nanofluidic applications. However, most precedent mechanisms still have remaining obstacles such as complicated fabrication processes, limitations of materials, and undesired damage on samples. Herein, we present the evaporation-driven transport-control of small molecules in gas-permeable and low-aspect ratio nanoslits, wherein both the diffusive and advective mass transports of solutes are affected by solvent evaporation through the nanoslit walls. The effect of the evaporation flux on the mass transport of small molecules in various nanoslit-integrated micro/nanofluidic devices is characterized, and dynamic transport along the nanoslit is investigated by conducting numerical simulations using the advection-diffusion equation. We further demonstrate that evaporation-driven, nanoslit-based transport-control can be easily applied to a micro/nanofluidic channel network in an independent and addressable array, offering a unique working principle for micro/nanofluidic applications and components such as molecule-valves, -concentrators, -pumps, and -filters.
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Affiliation(s)
- Sangjin Seo
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, Republic of Korea
| | - Dogyeong Ha
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, Republic of Korea
| | - Taesung Kim
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, Republic of Korea.
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11
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Le THH, Shimizu H, Morikawa K. Advances in Label-Free Detections for Nanofluidic Analytical Devices. MICROMACHINES 2020; 11:mi11100885. [PMID: 32977690 PMCID: PMC7598655 DOI: 10.3390/mi11100885] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 12/12/2022]
Abstract
Nanofluidics, a discipline of science and engineering of fluids confined to structures at the 1-1000 nm scale, has experienced significant growth over the past decade. Nanofluidics have offered fascinating platforms for chemical and biological analyses by exploiting the unique characteristics of liquids and molecules confined in nanospaces; however, the difficulty to detect molecules in extremely small spaces hampers the practical applications of nanofluidic devices. Laser-induced fluorescence microscopy with single-molecule sensitivity has been so far a major detection method in nanofluidics, but issues arising from labeling and photobleaching limit its application. Recently, numerous label-free detection methods have been developed to identify and determine the number of molecules, as well as provide chemical, conformational, and kinetic information of molecules. This review focuses on label-free detection techniques designed for nanofluidics; these techniques are divided into two groups: optical and electrical/electrochemical detection methods. In this review, we discuss on the developed nanofluidic device architectures, elucidate the mechanisms by which the utilization of nanofluidics in manipulating molecules and controlling light-matter interactions enhances the capabilities of biological and chemical analyses, and highlight new research directions in the field of detections in nanofluidics.
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Affiliation(s)
- Thu Hac Huong Le
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
- Correspondence: (T.H.H.L.); (H.S.); (K.M.)
| | - Hisashi Shimizu
- Collaborative Research Organization for Micro and Nano Multifunctional Devices (NMfD), The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
- Correspondence: (T.H.H.L.); (H.S.); (K.M.)
| | - Kyojiro Morikawa
- Collaborative Research Organization for Micro and Nano Multifunctional Devices (NMfD), The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
- Correspondence: (T.H.H.L.); (H.S.); (K.M.)
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12
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Song Y, Zhou T, Liu Q, Liu Z, Li D. Nanoparticle and microorganism detection with a side-micron-orifice-based resistive pulse sensor. Analyst 2020; 145:5466-5474. [PMID: 32578584 DOI: 10.1039/d0an00679c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
This paper presents the detection of nanoparticles and microorganisms using a recently developed side-orifice-based resistive pulse sensor (SO-RPS). By decreasing the channel height of the detection section of the SO-RPS, the detection sensitivity was increased and an average signal to noise ratio (S/N) of about 3 was achieved for 100 nm polystyrene particles. It was also found that spherical particles generate symmetrical signals. Algae with irregular shapes generate signals with more complex patterns. A scatter plot of signal magnitude versus signal width was proven to be reliable for differentiating bacteria from the nanoparticles and two types of algae. The side orifice for detecting heterogeneous nanoparticles and microorganisms is advantageous to avoid orifice clogging and the large flow resistance.
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Affiliation(s)
- Yongxin Song
- Department of Marine Engineering, Dalian Maritime University, Dalian, 116026, China
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13
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Movilli J, Di Iorio D, Rozzi A, Hiltunen J, Corradini R, Huskens J. "Plug-n-Play" Polymer Substrates: Surface Patterning with Reactive-Group-Appended Poly-l-lysine for Biomolecule Adhesion. ACS APPLIED POLYMER MATERIALS 2019; 1:3165-3173. [PMID: 32954353 PMCID: PMC7493307 DOI: 10.1021/acsapm.9b00814] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 10/01/2019] [Indexed: 06/11/2023]
Abstract
The immobilization of biomolecules onto polymeric surfaces employed in the fabrication of biomedical and biosensing devices is generally a challenging issue, as the absence of functional groups in such materials does not allow the use of common surface chemistries. Here we report the use of modified poly-l-lysine (PLL) as an effective method for the selective modification of polymeric materials with biomolecules. Cyclic olefin polymer (COP), Ormostamp, and polydimethylsiloxane (PDMS) surfaces were patterned with modified PLLs displaying either biotin or maleimide functional groups. Different patterning techniques were found to provide faithful microscale pattern formation, including micromolding in capillaries (MIMIC) and a hydrogel-based stamping device with micropores. The surface modification and pattern stability were tested with fluorescence microscopy, contact angle and X-ray photoelectron spectroscopy (XPS), showing an effective functionalization of substrates stable for over 20 days. By exploiting the strong biotin-streptavidin interaction or the thiol-maleimide coupling, DNA and PNA probes were displayed successfully on the surface of the materials, and these probes maintained the capability to specifically recognize complementary DNA sequences from solution. The printing of three different PNA-thiol probe molecules in a microarray fashion allowed selective DNA detection from a mixture of DNA analytes, demonstrating that the modified PLL methodology can potentially be used for multiplexed detection of DNA sequences.
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Affiliation(s)
- Jacopo Movilli
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology, University of
Twente, P.O. Box 217, 7500
AE Enschede, The Netherlands
| | - Daniele Di Iorio
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology, University of
Twente, P.O. Box 217, 7500
AE Enschede, The Netherlands
| | - Andrea Rozzi
- Department
of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Jussi Hiltunen
- VTT
Technical Research Center of Finland, 90570 Oulu, Finland
| | - Roberto Corradini
- Department
of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Jurriaan Huskens
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology, University of
Twente, P.O. Box 217, 7500
AE Enschede, The Netherlands
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14
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Birkin PR, Linfield S, Denuault G, Jones R, Youngs JJ, Wain E. An Analytical Differential Resistance Pulse System Relying on a Time Shift Signal Analysis-Applications in Coulter Counting. ACS Sens 2019; 4:2190-2195. [PMID: 31290312 DOI: 10.1021/acssensors.9b01087] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Improving the sensitivity and ultimately the range of particle sizes that can be detected with a single pore extends the versatility of the Coulter counting technique. Here, to enable a pore to have greater sensitivity, we have developed and tested a novel differential resistive pulse sensing (DiS) system for sizing particles. To do this, the response was generated through a time shift approach utilizing a "self-servoing regime" to enable the final signal to operate with a zero background in the absence of particle translocation. The detection and characterization of a series of polystyrene particles, forced to translocate through a cylindrical glass microchannel (GMC) by a suitable static pressure difference using this approach, is demonstrated. An analytical response, which scales with the size of the particles employed, was verified. Parasitic capacitive effects are discussed; however, translocations on the millisecond time scale can be detected with high sensitivity and accuracy using the approach described.
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Affiliation(s)
- Peter R. Birkin
- Department of Chemistry, University of Southampton, Southampton, SO171BJ, United Kingdom
| | - Steven Linfield
- Department of Chemistry, University of Southampton, Southampton, SO171BJ, United Kingdom
| | - Guy Denuault
- Department of Chemistry, University of Southampton, Southampton, SO171BJ, United Kingdom
| | - Ronald Jones
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jack J. Youngs
- Department of Chemistry, University of Southampton, Southampton, SO171BJ, United Kingdom
| | - Emily Wain
- Department of Chemistry, University of Southampton, Southampton, SO171BJ, United Kingdom
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15
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A novel microfluidic resistive pulse sensor with multiple voltage input channels and a side sensing gate for particle and cell detection. Anal Chim Acta 2019; 1052:113-123. [DOI: 10.1016/j.aca.2018.11.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 11/26/2018] [Indexed: 01/13/2023]
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16
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Peng R, Li D. Particle detection on microfluidic chips by differential resistive pulse sensing (RPS) method. Talanta 2018; 184:418-428. [PMID: 29674063 DOI: 10.1016/j.talanta.2018.03.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/05/2018] [Accepted: 03/09/2018] [Indexed: 11/19/2022]
Abstract
The resistive pulse sensing (RPS) method has been widely used for characterization of particles, cells, and biomolecules due to its merits of high sensitivity and resolution. This paper investigates working parameters involved in detecting submicron and micron-sized particles by the differential RPS method on microfluidic chips. Effects of particle-to-sensor size ratio, ionic concentration and pH of the electrolyte solution, and applied electric field are studied systematically by using polystyrene particles with a size range from 140 nm to 5 µm. The results show that both the amplitude and the signal-to-noise ratio (SNR) of the RPS signals increase with the particle-to-sensor size ratio as well as the ionic concentration of the electrolyte media. The amplitude of the RPS signals also increases with increasing applied voltage, while the SNR experiences an upslope at low voltages and a decline under the condition of high voltages. pH has little effect on the background noise of the differential RPS signals but reduces the amplitude of the RPS signals at high pH. Grouping of RPS signals is considered to be caused by interactions between the sensor walls and the particles. Nanoparticle detection by the differential RPS method can be enhanced by optimizing these working parameters.
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Affiliation(s)
- Ran Peng
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Dongqing Li
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.
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17
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Park YS, Oh JM, Cho YK. Non-lithographic nanofluidic channels with precisely controlled circular cross sections. RSC Adv 2018; 8:19651-19658. [PMID: 35540964 PMCID: PMC9080766 DOI: 10.1039/c8ra03496f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 05/24/2018] [Indexed: 11/21/2022] Open
Abstract
Nanofluidic channels have received growing interest due to their potential for applications in the manipulation of nanometric objects, such as DNA, proteins, viruses, exosomes, and nanoparticles. Although significant advances in nanolithography-based fabrication techniques over the past few decades have allowed us to explore novel nanofluidic transport phenomena and unique applications, the development of new technologies enabling the low-cost preparation of nanochannels with controllable and reproducible shapes and dimensions is still lacking. Thus, we herein report the application of a nanofiber printed using a near-field electrospinning method as a sacrificial mold for the preparation of polydimethylsiloxane nanochannels with circular cross sections. Control of the size and shape of these nanochannels allowed the preparation of nanochannels with channel widths ranging from 70-368 nm and height-to-width ratios of 0.19-1.00. Capillary filling tests confirmed the excellent uniformity and reproducibility of the nanochannels. These results therefore are expected to inspire novel nanofluidic studies due to the simple and low-cost nature of this fabrication process, which allows precise control of the shape and dimensions of the circular cross section.
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Affiliation(s)
- Yang-Seok Park
- Department of Biomedical Engineering, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
- Center for Soft and Living Matter, Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
| | - Jung Min Oh
- Department of Biomedical Engineering, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
- Center for Soft and Living Matter, Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
| | - Yoon-Kyoung Cho
- Department of Biomedical Engineering, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
- Center for Soft and Living Matter, Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
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18
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Kellman M, Rivest F, Pechacek A, Sohn L, Lustig M. Node-Pore Coded Coincidence Correction: Coulter Counters, Code Design, and Sparse Deconvolution. IEEE SENSORS JOURNAL 2018; 18:3068-3079. [PMID: 29988953 PMCID: PMC6034687 DOI: 10.1109/jsen.2018.2805865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We present a novel method to perform individual particle (e.g. cells or viruses) coincidence correction through joint channel design and algorithmic methods. Inspired by multiple-user communication theory, we modulate the channel response, with Node-Pore Sensing, to give each particle a binary Barker code signature. When processed with our modified successive interference cancellation method, this signature enables both the separation of coincidence particles and a high sensitivity to small particles. We identify several sources of modeling error and mitigate most effects using a data-driven self-calibration step and robust regression. Additionally, we provide simulation analysis to highlight our robustness, as well as our limitations, to these sources of stochastic system model error. Finally, we conduct experimental validation of our techniques using several encoded devices to screen a heterogeneous sample of several size particles.
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Affiliation(s)
- Michael Kellman
- Dept. of Electrical Engineering and Computer Sciences, University of California, Berkeley
| | - Francois Rivest
- Dept. of Mechanical Engineering, University of California, Berkeley
- Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, Switzerland
| | - Alina Pechacek
- Dept. of Electrical Engineering and Computer Sciences, University of California, Berkeley
| | - Lydia Sohn
- Dept. of Mechanical Engineering, University of California, Berkeley
- Graduate Program in Bioengineering, University of California Berkeley, Berkeley, CA, USA
| | - Michael Lustig
- Dept. of Electrical Engineering and Computer Sciences, University of California, Berkeley
- Graduate Program in Bioengineering, University of California Berkeley, Berkeley, CA, USA
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19
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Peng R, Tang XS, Li D. Detection of Individual Molecules and Ions by Carbon Nanotube-Based Differential Resistive Pulse Sensor. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800013. [PMID: 29504261 DOI: 10.1002/smll.201800013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 01/18/2018] [Indexed: 06/08/2023]
Abstract
This paper presents a new method of sensing single molecules and cations by a carbon nanotube (CNT)-based differential resistive pulse sensing (RPS) technique on a nanofluidic chip. A mathematical model for multichannel RPS systems is developed to evaluate the CNT-based RPS signals. Individual cations, rhodamine B dye molecules, and ssDNAs are detected successfully with high resolution and high signal-to-noise ratio. Differentiating ssDNAs with 15 and 30 nucleotides are achieved. The experimental results also show that translocation of negatively charged ssDNAs through a CNT decreases the electrical resistance of the CNT channel, while translocation of positively charged cations and rhodamine B molecules increases the electrical resistance of the CNT. The CNT-based nanofluidic device developed in this work provides a new avenue for single-molecule/ion detection and offers a potential strategy for DNA sequencing.
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Affiliation(s)
- Ran Peng
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Xiaowu Shirley Tang
- Department of Chemistry & Waterloo Institute for Nanotechnology (WIN), University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Dongqing Li
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
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