1
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Liu R, Liu Z, Li J, Qiu Y. Low-cost and convenient fabrication of polymer micro/nanopores with the needle punching process and their applications in nanofluidic sensing. BIOMICROFLUIDICS 2024; 18:024103. [PMID: 38571910 PMCID: PMC10987195 DOI: 10.1063/5.0203512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 03/13/2024] [Indexed: 04/05/2024]
Abstract
Solid-state micro/nanopores play an important role in the sensing field because of their high stability and controllable size. Aiming at problems of complex processes and high costs in pore manufacturing, we propose a convenient and low-cost micro/nanopore fabrication technique based on the needle punching method. The thin film is pierced by controlling the feed of a microscale tungsten needle, and the size variations of the micropore are monitored by the current feedback system. Based on the positive correlation between the micropore size and the current threshold, the size-controllable preparation of micropores is achieved. The preparation of nanopores is realized by the combination of needle punching and chemical etching. First, a conical defect is prepared on the film with the tungsten needle. Then, nanopores are obtained by unilateral chemical etching of the film. Using the prepared conical micropores, resistive-pulse detection of nanoparticles is performed. Significant ionic current rectification is also obtained with our conical nanopores. It is proved that the properties of micro/nanopores prepared by our method are comparable to those prepared by the track-etching method. The simple and controllable fabrication process proposed here will advance the development of low-cost micro/nanopore sensors.
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Affiliation(s)
- Rui Liu
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Zhe Liu
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Jianfeng Li
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Yinghua Qiu
- Author to whom correspondence should be addressed:
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2
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Miao L, Huang B, Fang H, Chai J, Liu Z, Zhai Y. Single-Nanoparticle-Based Nanomachining for Fabrication of a Uniform Nanochannel Sensor. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2305159. [PMID: 37486796 DOI: 10.1002/adma.202305159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/07/2023] [Indexed: 07/26/2023]
Abstract
The structure of nanomaterials and nanodevices determines their functionality and applications. A single uniform nanochannel with a high aspect ratio is an attractive structure due to its unique rigid structures, easy preparation, and diverse pore structures and it holds significant promising importance in fields such as nanopore sensing and nanomanufacturing. Although the metal-nanoparticle-assistant silicon etching technique can produce uniform nanochannels, however, the fabrication of single through nanochannels remains a challenge thus far. A simple and versatile strategy is developed that allows for the retention of individual gold nanoparticle on a substrate, enabling single-nanoparticle nanomachining. This method involves three steps: the formation of a carbon protective layer on individual nanoparticles via electron-beam irradiation, selective removal of unprotected nanoparticles using a corrosive agent, and subsequent elimination of the carbon layer. This enables the fabrication of a single submillimeter-long uniform through nanochannel in the silicon wafer, which can be employed for nanopore sensing and shape-based nanoparticle distinguishing. The developed method can also facilitate single-nanoparticle studies and nanomachining for a broad application in materials science, electronics, micro/nano-optics, and catalysis.
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Affiliation(s)
- Longfei Miao
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, P. R. China
| | - Bintong Huang
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, P. R. China
| | - Hui Fang
- Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, Wuhan, Hubei, 430072, P. R. China
| | - Jia Chai
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, P. R. China
| | - Ze Liu
- Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, Wuhan, Hubei, 430072, P. R. China
| | - Yueming Zhai
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, P. R. China
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3
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Chen F, Zhao Y, Saxena A, Zhao C, Niu M, Aluru NR, Feng J. Inducing Electric Current in Graphene Using Ionic Flow. NANO LETTERS 2023; 23:4464-4470. [PMID: 37154839 DOI: 10.1021/acs.nanolett.3c00821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Classical nanofluidic frameworks account for the confined fluid and ion transport under an electrostatic field at the solid-liquid interface, but the electronic property of the solid is often overlooked. Harvesting the interaction of the nanofluidic transport with the electron transport in solid requires a route effectively coupling ion and electron dynamics. Here we report a nanofluidic analogy of Coulomb drag for exploring the dynamic ion-electron interactions at the liquid-graphene interface. An induced electric current in graphene by ionic flow with no bias directly applied to the graphene channel is observed experimentally, featuring an opposite electron current direction to the ion current. Our experiments and ab initio calculations show that the current generation stems from the confined ion-electron interactions via a nanofluidic Coulomb drag mechanism. Our findings may open up a new dimension for nanofluidics and transport control by ion-electron coupling.
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Affiliation(s)
- Fanfan Chen
- Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Yunhong Zhao
- Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Anshul Saxena
- Oden Institute for Computational Engineering and Sciences, Walker Department of Mechanical Engineering, the University of Texas at Austin, Austin, Texas 78712, United States
| | - Chunxiao Zhao
- Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Mengdi Niu
- Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Narayana R Aluru
- Oden Institute for Computational Engineering and Sciences, Walker Department of Mechanical Engineering, the University of Texas at Austin, Austin, Texas 78712, United States
| | - Jiandong Feng
- Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
- Research Center for Quantum Sensing, Research Institute of Intelligent Sensing, Zhejiang Lab, Hangzhou, 311121, China
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4
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Vieira LF, Weinhofer AC, Oltjen WC, Yu C, de Souza Mendes PR, Hore MJA. Combining dynamic Monte Carlo with machine learning to study nanoparticle translocation. SOFT MATTER 2022; 18:5218-5229. [PMID: 35770621 DOI: 10.1039/d2sm00431c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Resistive pulse sensing (RPS) measurements of nanoparticle translocation have the ability to provide information on single-particle level characteristics, such as diameter or mobility, as well as ensemble averages. However, interpreting these measurements is complex and requires an understanding of nanoparticle dynamics in confined spaces as well as the ways in which nanoparticles disrupt ion transport while inside a nanopore. Here, we combine Dynamic Monte Carlo (DMC) simulations with Machine Learning (ML) and Poisson-Nernst-Planck calculations to simultaneously simulate nanoparticle dynamics and ion transport during hundreds of independent particle translocations as a function of nanoparticle size, electrophoretic mobility, and nanopore length. The use of DMC simulations allowed us to explicitly investigate the effects of Brownian motion and nanoparticle/nanopore characteristics on the amplitude and duration of translocation signals. Simulation results were verified with experimental RPS measurements and found to be in quantitative agreement.
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Affiliation(s)
- Luiz Fernando Vieira
- Department of Macromolecular Science & Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA.
- Department of Mechanical Engineering, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, Rio de Janeiro, RJ 22451-900, Brazil
- Instituto Nacional de Tecnologia, Ministry of Science, Technology & Innovation, Av. Venezuela, 82 - Rio de Janeiro, RJ 20081-312, Brazil
| | - Alexandra C Weinhofer
- Department of Macromolecular Science & Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA.
| | - William C Oltjen
- Department of Macromolecular Science & Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA.
| | - Cindy Yu
- Hathaway Brown School, 19600 North Park Blvd., Shaker Heights, OH 44122, USA
| | - Paulo Roberto de Souza Mendes
- Department of Mechanical Engineering, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, Rio de Janeiro, RJ 22451-900, Brazil
| | - Michael J A Hore
- Department of Macromolecular Science & Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA.
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5
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Tang W, Fried JP, Tilley RD, Gooding JJ. Understanding and modelling the magnitude of the change in current of nanopore sensors. Chem Soc Rev 2022; 51:5757-5776. [PMID: 35748606 DOI: 10.1039/d1cs00972a] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanopores are promising sensing devices that can be used for the detection of analytes at the single molecule level. It is of importance to understand and model the current response of a nanopore sensor for improving the sensitivity of the sensor, a better interpretation of the behaviours of different analytes in confined nanoscale spaces, and quantitative analysis of the properties of the targets. The current response of a nanopore sensor, usually called a resistive pulse, results from the change in nanopore resistance when an analyte translocates through the nanopore. This article reviews the theoretical models used for the calculation of the resistance of the nanopore, and the corresponding change in nanopore resistance due to a translocation event. Models focus on the resistance of the pore cavity region and the access region of the nanopore. The influence of the sizes, shapes and surface charges of the translocating species and the nanopore, as well as the trajectory that the analyte follows are also discussed. This review aims to give a general guidance to the audience for understanding the current response of a nanopore sensor and the application of this class of sensor to a broad range of species with the theoretical models.
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Affiliation(s)
- Wenxian Tang
- School of Chemistry, Australian Centre for NanoMedicine, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jasper P Fried
- School of Chemistry, Australian Centre for NanoMedicine, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Richard D Tilley
- School of Chemistry, Australian Centre for NanoMedicine, The University of New South Wales, Sydney, New South Wales 2052, Australia.,Electron Microscope Unit, Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - J Justin Gooding
- School of Chemistry, Australian Centre for NanoMedicine, The University of New South Wales, Sydney, New South Wales 2052, Australia
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6
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Prajapati JD, Pangeni S, Aksoyoglu MA, Winterhalter M, Kleinekathöfer U. Changes in Salt Concentration Modify the Translocation of Neutral Molecules through a ΔCymA Nanopore in a Non-monotonic Manner. ACS NANO 2022; 16:7701-7712. [PMID: 35435659 DOI: 10.1021/acsnano.1c11471] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The voltage-dependent transport through biological and artificial nanopores is being used in many applications such as DNA or protein sequencing and sensing. The primary approach to determine the transport has been to measure the temporal ion current fluctuations caused by solutes when applying external voltages. Crossing the nanoscale confinement in the presence of an applied electric field primarily relies on two factors, i.e., the electrophoretic drag and electroosmosis. The electroosmotic flow (EOF) is a voltage-dependent ion-associated flow of solvent molecules, i.e., usually water, and depends on many factors, such as pH, temperature, pore diameter, and also the concentration of ions. The exact interplay between these factors is so far poorly understood. In this joint experimental and computational study, we have investigated the dependence of the EOF on the concentration of the buffer salt by probing the transport of α-cyclodextrin molecules through the ΔCymA channel. For five different KCl concentrations in the range between 0.125 and 2 M, we performed applied-field molecular dynamics simulations and analyzed the ionic flow and the EOF across the ΔCymA pore. To our surprise, the concentration-dependent net ionic flux changes non-monotonically and nonlinearly and the EOF is seen to follow the same pattern. On the basis of these findings, we were able to correlate the concentration-dependent EOF with experimental kinetic constants for the translocation of α-cyclodextrin through the ΔCymA nanopore. Overall, the results further improve our understanding of the EOF-mediated transport through nanopores and show that the EOF needs to seriously be taken into consideration when analyzing the permeation of (neutral) substrates through nanopores.
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Affiliation(s)
| | - Sushil Pangeni
- Department of Life Sciences and Chemistry, Jacobs University Bremen, 28759 Bremen, Germany
| | | | - Mathias Winterhalter
- Department of Life Sciences and Chemistry, Jacobs University Bremen, 28759 Bremen, Germany
| | - Ulrich Kleinekathöfer
- Department of Physics and Earth Sciences, Jacobs University Bremen, 28759 Bremen, Germany
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7
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Leong IW, Tsutsui M, Yokota K, Taniguchi M. Salt Gradient Control of Translocation Dynamics in a Solid-State Nanopore. Anal Chem 2021; 93:16700-16708. [PMID: 34860500 DOI: 10.1021/acs.analchem.1c04342] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tuning capture rates and translocation time of analytes in solid-state nanopores are one of the major challenges for their use in detecting and analyzing individual nanoscale objects via ionic current measurements. Here, we report on the use of salt gradient for the fine control of capture-to-translocation dynamics in 300 nm sized SiNx nanopores. We demonstrated a decrease up to a factor of 3 in the electrophoretic speed of nanoparticles at the pore exit along with an over 3-fold increase in particle detection efficiency by subjecting a 5-fold ion concentration difference across the dielectric membrane. The improvement in the sensor performance was elucidated to be a result of the salt-gradient-mediated electric field and electroosmotic flow asymmetry at nanochannel orifices. The present findings can be used to enhance nanopore sensing capability for detecting biomolecules such as amyloids and proteins.
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Affiliation(s)
- Iat Wai Leong
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Makusu Tsutsui
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Kazumichi Yokota
- National Institute of Advanced Industrial Science and Technology, Takamatsu, Kagawa 761-0395, Japan
| | - Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
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8
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Prajapati JD, Kleinekathöfer U. Voltage-Dependent Transport of Neutral Solutes through Nanopores: A Molecular View. J Phys Chem B 2020; 124:10718-10731. [PMID: 33175522 DOI: 10.1021/acs.jpcb.0c08401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The permeation of (neutral) molecules through nanopores in the presence of external voltages depends on several factors including pore electrostatics, electrophoretic force, and electro-osmotic drag. In earlier single-channel electrophysiology experiments, voltage-dependent asymmetric transport of neutral α-cyclodextrin (α-CD) molecules through the biological nanopore ΔCymA was observed. The voltage-dependent ion-associated flow of water, the so-called electro-osmotic flow, has been suggested to be the key factor behind the observed asymmetric behavior. The influence of pore electrostatics and electrophoretic force and their interplay with the electro-osmotic drag with varying buffers and voltages has not yet been analyzed at the molecular level. Hence, the detailed physical mechanism behind this intriguing permeation process is in part still unclear. In the present study, we have performed 36 μs all-atom free energy calculations by combining applied-field molecular dynamics simulations with metadynamics techniques. The influence of several ionic conditions as well as external voltages on the permeation of α-CD molecules across the ΔCymA pore has been investigated. To decipher the thermodynamic and kinetic details, the lowest energy paths and the permeation times for α-CD translocation have been estimated. In the presence of KCl or MgCl2 salts, the charge of the cations is found to control the direction and magnitude of the electro-osmotic flow, which in turn strongly affects α-CD permeation. Overall, the present findings significantly improve the fundamental understanding of the voltage-dependent transport of neutral solutes across nanopores.
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Affiliation(s)
| | - Ulrich Kleinekathöfer
- Department of Physics and Earth Sciences, Jacobs University Bremen, 28759 Bremen, Germany
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9
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Gangotra A, Biviano M, Dagastine RR, Berry JD, Willmott GR. Use of microaspiration to study the mechanical properties of polymer gel microparticles. SOFT MATTER 2019; 15:7286-7294. [PMID: 31498362 DOI: 10.1039/c9sm00862d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The mechanical properties of polyacrylamide (PA) and polydimethylsiloxane (PDMS) microparticle populations have been measured using microaspiration, a recently developed experimental technique. Microaspiration is an augmented version of micropipette aspiration, in which optical microscopy data are obtained as individual soft particles pass through the tip of a micropipette. During microaspiration, the ion current passing through the pipette tip is also measured, and the synchronised optical and current data streams are used to study and quantify mechanical properties. Ion current signatures for the poroelastic PA particles were qualitatively different from those of the viscoelastic PDMS particles. For PA particles the current gradually reduced during each aspiration event, whereas for PDMS particles the current trace resembled a negative top hat function. For PA particles it was found that the maximum change in current during aspiration (ΔIh) increased with particle size. By considering the initial elastic response, a mean effective shear modulus (G') of 6.6 ± 0.2 kPa was found for aspiration of 115 PA particles of ∼10-20 μm diameter. Using a viscoelastic model to describe flow into the pipette, a mean initial effective elastic modulus (E0') of 3.5 ± 1.7 MPa was found for aspiration of 17 PDMS particles of ∼ 9-11 μm diameter. These moduli are consistent with previously reported literature values, providing initial validation of the microaspiration method.
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Affiliation(s)
- Ankita Gangotra
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand
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10
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Gangotra A, Willmott GR. Mechanical properties of bovine erythrocytes derived from ion current measurements using micropipettes. Bioelectrochemistry 2019; 128:204-210. [DOI: 10.1016/j.bioelechem.2019.04.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/10/2019] [Accepted: 04/10/2019] [Indexed: 12/31/2022]
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11
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Hulings ZK, Melnikov DV, Gracheva ME. Brownian dynamics simulations of the ionic current traces for a neutral nanoparticle translocating through a nanopore. NANOTECHNOLOGY 2018; 29:445204. [PMID: 30109992 DOI: 10.1088/1361-6528/aada64] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this work, the ionic current blockades due to the translocation of a neutral spherical nanoparticle through a nanopore in a solid state membrane are computed. We use a Brownian dynamics approach, in conjunction with a full three-dimensional self-consistent solution of the Poisson-Nernst-Planck and Navier-Stockes system of equations to describe realistic ionic current response arising due to the random motion of a nanoparticle through a nanopore. We find that in addition to the usual geometric blockade, the variations of the current along the axis of the pore are largely caused by a concentration polarization induced by the presence of the translocating nanoparticle in the nanopore while the current changes in the radial (perpendicular to the axis) direction occur because of the local build up of the ionic charge between the particle and the nanopore surface. By performing statistical analysis of the current traces, we also observe that, in general, smaller current blockade values correspond to faster translocation times, while increased dwell times result in a larger current decrease.
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Affiliation(s)
- Zachery K Hulings
- Department of Physics, Clarkson University, Potsdam, NY 13699, United States of America
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12
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Vázquez Juiz ML, Soto Gómez D, Pérez Rodríguez P, Paradelo M, López Periago JE. Humic acids modify the pulse size distributions in the characterization of plastic microparticles by Tunable Resistive Pulse Sensing. JOURNAL OF CONTAMINANT HYDROLOGY 2018; 218:59-69. [PMID: 30361114 DOI: 10.1016/j.jconhyd.2018.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 10/12/2018] [Accepted: 10/12/2018] [Indexed: 06/08/2023]
Abstract
Tunable Resistive Pulse Sensing, TRPS, is an emerging technique used in quantification and measuring the size (particle-by-particle) of viruses, exosomes and engineered colloidal spheres in biological fluids. We study the features of TRPS to enhance size characterization and quantification of submicron-sized microplastics, also called plastic microparticles, MP, in freshwater environments. We report alterations on the detection of the resistive pulses in the TRPS caused by humic acids, HA, during the size measurement of polystyrene microspheres used as MP surrogate. We discuss the alteration of the electric field in the measuring channel of the TRPS apparatus induced by the passage of HA. TRPS is a fast and precise technique for counting and size determination of MP but needs the evaluation of the influence of the organic matter on the current blockades. We show that statistical clustering models of the magnitude distribution of the resistive pulses can help to detect and quantify changes in the pulse size distributions induced by flocculation of humic acids. Conclusions of this study indicate that TRPS can be a valuable tool to improve the knowledge of the MP fate in surface waters, in the vadose zone and groundwater.
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Affiliation(s)
- María Laura Vázquez Juiz
- Dept. Bioloxía Vexetal e Ciencias do Solo, Facultade de Ciencias, Campus da Auga, University of Vigo, Edificio politécnico s/n As Lagoas, 32004 Ourense, Spain; Hydraulics Laboratory, Campus da Auga, University of Vigo, Spain.
| | - Diego Soto Gómez
- Dept. Bioloxía Vexetal e Ciencias do Solo, Facultade de Ciencias, Campus da Auga, University of Vigo, Edificio politécnico s/n As Lagoas, 32004 Ourense, Spain; Hydraulics Laboratory, Campus da Auga, University of Vigo, Spain.
| | - Paula Pérez Rodríguez
- Laboratory of Hydrology and Geochemistry of Strasbourg (LHyGeS) University of Strasbourg/EOST, UMR7517-CNRS, France; Hydraulics Laboratory, Campus da Auga, University of Vigo, Spain; Dept. Bioloxía Vexetal e Ciencias do Solo, Facultade de Ciencias, Campus da Auga, University of Vigo, Edificio politécnico s/n As Lagoas, 32004 Ourense, Spain
| | - Marcos Paradelo
- Department of Sustainable Agricultural Sciences, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - José Eugenio López Periago
- Dept. Bioloxía Vexetal e Ciencias do Solo, Facultade de Ciencias, Campus da Auga, University of Vigo, Edificio politécnico s/n As Lagoas, 32004 Ourense, Spain; Hydraulics Laboratory, Campus da Auga, University of Vigo, Spain
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13
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Liu Y, Xu C, Yu P, Chen X, Wang J, Mao L. Counting and Sizing of Single Vesicles/Liposomes by Electrochemical Events. ChemElectroChem 2018. [DOI: 10.1002/celc.201800616] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yang Liu
- Research Center for Analytical Sciences Department of Chemistry, College of SciencesNortheastern University Box 332 Shenyang 110819 China
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of ChemistryThe Chinese Academy of Sciences (CAS) Beijing 100190 China
| | - Cong Xu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of ChemistryThe Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Ping Yu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of ChemistryThe Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xuwei Chen
- Research Center for Analytical Sciences Department of Chemistry, College of SciencesNortheastern University Box 332 Shenyang 110819 China
| | - Jianhua Wang
- Research Center for Analytical Sciences Department of Chemistry, College of SciencesNortheastern University Box 332 Shenyang 110819 China
| | - Lanqun Mao
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of ChemistryThe Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
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14
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Laborda E, Molina A, Batchelor-McAuley C, Compton RG. Individual Detection and Characterization of Non-Electrocatalytic, Redox-Inactive Particles in Solution by using Electrochemistry. ChemElectroChem 2017. [DOI: 10.1002/celc.201701000] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Eduardo Laborda
- Departamento de Química Física, Facultad de Química, Regional Campus of International Excellence “Campus Mare Nostrum”; Universidad de Murcia; 30100 Murcia Spain
| | - Angela Molina
- Departamento de Química Física, Facultad de Química, Regional Campus of International Excellence “Campus Mare Nostrum”; Universidad de Murcia; 30100 Murcia Spain
| | - Christopher Batchelor-McAuley
- Department of Chemistry, Physical & Theoretical Chemistry Laboratory; Oxford University; South Parks Road Oxford OX1 3QZ UK
| | - Richard G. Compton
- Department of Chemistry, Physical & Theoretical Chemistry Laboratory; Oxford University; South Parks Road Oxford OX1 3QZ UK
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15
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Alibakhshi MA, Halman JR, Wilson J, Aksimentiev A, Afonin KA, Wanunu M. Picomolar Fingerprinting of Nucleic Acid Nanoparticles Using Solid-State Nanopores. ACS NANO 2017; 11:9701-9710. [PMID: 28841287 PMCID: PMC5959297 DOI: 10.1021/acsnano.7b04923] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Nucleic acid nanoparticles (NANPs) are an emerging class of programmable structures with tunable shape and function. Their promise as tools for fundamental biophysics studies, molecular sensing, and therapeutic applications necessitates methods for their detection and characterization at the single-particle level. In this work, we study electrophoretic transport of individual ring-shaped and cube-shaped NANPs through solid-state nanopores. In the optimal nanopore size range, the particles must deform to pass through, which considerably increases their residence time within the pore. Such anomalously long residence times permit detection of picomolar amounts of NANPs when nanopore measurements are carried out at a high transmembrane bias. In the case of a NANP mixture, the type of individual particle passing through nanopores can be efficiently determined from analysis of a single electrical pulse. Molecular dynamics simulations provide insight into the mechanical barrier to transport of the NANPs and corroborate the difference in the signal amplitudes observed for the two types of particles. Our study serves as a basis for label-free analysis of soft programmable-shape nanoparticles.
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Affiliation(s)
| | - Justin R. Halman
- Nanoscale Science Program, Department of Chemistry, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - James Wilson
- Department of Physics, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Aleksei Aksimentiev
- Department of Physics, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Kirill A. Afonin
- Nanoscale Science Program, Department of Chemistry, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
- The Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - Meni Wanunu
- Department of Physics, Northeastern University, Boston, Massachusetts 02115, United States
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
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16
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A hybrid resistive pulse-optical detection platform for microfluidic experiments. Sci Rep 2017; 7:10173. [PMID: 28860641 PMCID: PMC5579027 DOI: 10.1038/s41598-017-10000-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 08/01/2017] [Indexed: 12/31/2022] Open
Abstract
Resistive-pulse sensing is a label-free method for characterizing individual particles as they pass through ion-conducting channels or pores. During a resistive pulse experiment, the ionic current through a conducting channel is monitored as particles suspended in the solution translocate through the channel. The amplitude of the current decrease during a translocation, or ‘pulse’, depends not only on the ratio of the particle and channel sizes, but also on the particle position, which is difficult to resolve with the resistive pulse signal alone. We present experiments of simultaneous electrical and optical detection of particles passing through microfluidic channels to resolve the positional dependencies of the resistive pulses. Particles were tracked simultaneously in the two signals to create a mapping of the particle position to resistive pulse amplitude at the same instant in time. The hybrid approach will improve the accuracy of object characterization and will pave the way for observing dynamic changes of the objects such as deformation or change in orientation. This combined approach of optical detection and resistive pulse sensing will join with other attempts at hybridizing high-throughput detection techniques such as imaging flow cytometry.
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17
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Melnikov DV, Hulings ZK, Gracheva ME. Electro-osmotic flow through nanopores in thin and ultrathin membranes. Phys Rev E 2017; 95:063105. [PMID: 28709345 DOI: 10.1103/physreve.95.063105] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Indexed: 05/28/2023]
Abstract
We theoretically study how the electro-osmotic fluid velocity in a charged cylindrical nanopore in a thin solid state membrane depends on the pore's geometry, membrane charge, and electrolyte concentration. We find that when the pore's length is comparable to its diameter, the velocity profile develops a concave shape with a minimum along the pore axis unlike the situation in very long nanopores with a maximum velocity along the central pore axis. This effect is attributed to the induced pressure along the nanopore axis due to the fluid flow expansion and contraction near the exit or entrance to the pore and to the reduction of electric field inside the nanopore. The induced pressure is maximal when the pore's length is about equal to its diameter while decreasing for both longer and shorter nanopores. A model for the fluid velocity incorporating these effects is developed and shown to be in a good agreement with numerically computed results.
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Affiliation(s)
- Dmitriy V Melnikov
- Department of Physics, Clarkson University, Potsdam, New York 13699, USA
| | - Zachery K Hulings
- Department of Physics, Clarkson University, Potsdam, New York 13699, USA
| | - Maria E Gracheva
- Department of Physics, Clarkson University, Potsdam, New York 13699, USA
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18
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Bhamidimarri SP, Prajapati JD, van den Berg B, Winterhalter M, Kleinekathöfer U. Role of Electroosmosis in the Permeation of Neutral Molecules: CymA and Cyclodextrin as an Example. Biophys J 2017; 110:600-611. [PMID: 26840725 DOI: 10.1016/j.bpj.2015.12.027] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 12/23/2015] [Accepted: 12/28/2015] [Indexed: 11/25/2022] Open
Abstract
To quantify the flow of small uncharged molecules into and across nanopores, one often uses ion currents. The respective ion-current fluctuations caused by the presence of the analyte make it possible to draw some conclusions about the direction and magnitude of the analyte flow. However, often this flow appears to be asymmetric with respect to the applied voltage. As a possible reason for this asymmetry, we identified the electroosmotic flow (EOF), which is the water transport associated with ions driven by the external transmembrane voltage. As an example, we quantify the contribution of the EOF through a nanopore by investigating the permeation of α-cyclodextrin through CymA, a cyclodextrin-specific channel from Klebsiella oxytoca. To understand the results from electrophysiology on a molecular level, all-atom molecular dynamics simulations are used to detail the effect of the EOF on substrate entry to and exit from a CymA channel in which the N-terminus has been deleted. The combined experimental and computational results strongly suggest that one needs to account for the significant contribution of the EOF when analyzing the penetration of cyclodextrins through the CymA pore. This example study at the same time points to the more general finding that the EOF needs to be considered in translocation studies of neutral molecules and, at least in many cases, should be able to help in discriminating between translocation and binding events.
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Affiliation(s)
| | | | - Bert van den Berg
- Institute for Cell and Molecular Biosciences, The Medical School, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Mathias Winterhalter
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Bremen, Germany
| | - Ulrich Kleinekathöfer
- Department of Physics and Earth Sciences, Jacobs University Bremen, Bremen, Germany.
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19
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Lee SJ, Kang JY, Choi W, Kwak R. Nanopore Sensing in Aqueous Two-Phase System: Simultaneous Enhancement of Signal and Translocation Time via Conformal Coating. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1601725. [PMID: 27753235 DOI: 10.1002/smll.201601725] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 09/15/2016] [Indexed: 06/06/2023]
Abstract
Nanofluidic resistive pulse sensing (RPS) has been extensively used to measure the size, concentration, and surface charge of nanoparticles in electrically conducting solutions. Although various methods have been explored for improving detection performances, intrinsic problems including the extremely low particle-to-pore volume ratio (<0.01%) and fast nanoparticle translocation (10-1000 µs) still induce difficulties in detection, such as low signal magnitudes and short translocation times. Herein, we present an aqueous two-phase system (ATPS) in a nanofluidic RPS for amplifying translocation signals and decreasing translocation speeds simultaneously. Two immiscible aqueous liquids build a liquid-liquid interface inside nanopores. As particles translocate from a high-affinity liquid phase into a lower-affinity one, the high-affinity liquid forms a conformal coating on the particles, which increases the effective particle size and amplifies the current-blockage signal. The translocation time is also increased, as the ATPS interface impedes the particle translocation. For 20 nm particles, 7.92-fold and 5.82-fold enhancements of signal magnitude and translocation time can be achieved. To our knowledge, this is the first attempt to improve nanofluidic RPS by treating an interface of solution reservoirs for manipulating target particles rather than nanopores. This direct particle manipulation allows us to solve the two intrinsic problems all at once.
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Affiliation(s)
- Sang Jun Lee
- School of Mechanical Engineering, Korea University, Seoul, 136-701, Republic of Korea
- Center for BioMicrosystems, Korea Institute of Science and Technology, Seoul, 136-791, Republic of Korea
| | - Ji Yoon Kang
- Center for BioMicrosystems, Korea Institute of Science and Technology, Seoul, 136-791, Republic of Korea
| | - Wonjoon Choi
- School of Mechanical Engineering, Korea University, Seoul, 136-701, Republic of Korea
| | - Rhokyun Kwak
- Center for BioMicrosystems, Korea Institute of Science and Technology, Seoul, 136-791, Republic of Korea
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20
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Qiu Y, Lin CY, Hinkle P, Plett TS, Yang C, Chacko JV, Digman MA, Yeh LH, Hsu JP, Siwy ZS. Highly Charged Particles Cause a Larger Current Blockage in Micropores Compared to Neutral Particles. ACS NANO 2016; 10:8413-8422. [PMID: 27532683 DOI: 10.1021/acsnano.6b03280] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Single pores in the resistive-pulse technique are used as an analytics tool to detect, size, and characterize physical as well as chemical properties of individual objects such as molecules and particles. Each object passing through a pore causes a transient change of the transmembrane current called a resistive pulse. In high salt concentrations when the pore diameter is significantly larger than the screening Debye length, it is assumed that the particle size and surface charge can be determined independently from the same experiment. In this article we challenge this assumption and show that highly charged hard spheres can cause a significant increase of the resistive-pulse amplitude compared to neutral particles of a similar diameter. As a result, resistive pulses overestimate the size of charged particles by even 20%. The observation is explained by the effect of concentration polarization created across particles in a pore, revealed by numerical modeling of ionic concentrations, ion current, and local electric fields. It is notable that in resistive-pulse experiments with cylindrical pores, concentration polarization was previously shown to influence ionic concentrations only at pore entrances; consequently, additional and transient modulation of resistive pulses was observed when a particle entered or left the pore. Here we postulate that concentration polarization can occur across transported particles at any particle position along the pore axis and affect the magnitude of the entire resistive pulse. Consequently, the recorded resistive pulses of highly charged particles reflect not only the particles' volume but also the size of the depletion zone created in front of the moving particle. Moreover, the modeling identified that the effective surface charge density of particles depended not only on the density of functional groups on the particle but also on the capacitance of the Stern layer. The findings are of crucial importance for sizing particles and characterizing their surface charge properties.
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Affiliation(s)
- Yinghua Qiu
- School of Mechanical Engineering and Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University , Nanjing 211189, China
| | - Chih-Yuan Lin
- Department of Chemical Engineering, National Taiwan University , Taipei 10617, Taiwan
| | | | | | | | | | | | - Li-Hsien Yeh
- Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology , Yunlin 64002, Taiwan
| | - Jyh-Ping Hsu
- Department of Chemical Engineering, National Taiwan University , Taipei 10617, Taiwan
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21
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Darvish A, Goyal G, Aneja R, Sundaram RVK, Lee K, Ahn CW, Kim KB, Vlahovska PM, Kim MJ. Nanoparticle mechanics: deformation detection via nanopore resistive pulse sensing. NANOSCALE 2016; 8:14420-14431. [PMID: 27321911 DOI: 10.1039/c6nr03371g] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Solid-state nanopores have been widely used in the past for single-particle analysis of nanoparticles, liposomes, exosomes and viruses. The shape of soft particles, particularly liposomes with a bilayer membrane, can greatly differ inside the nanopore compared to bulk solution as the electric field inside the nanopores can cause liposome electrodeformation. Such deformations can compromise size measurement and characterization of particles, but are often neglected in nanopore resistive pulse sensing. In this paper, we investigated the deformation of various liposomes inside nanopores. We observed a significant difference in resistive pulse characteristics between soft liposomes and rigid polystyrene nanoparticles especially at higher applied voltages. We used theoretical simulations to demonstrate that the difference can be explained by shape deformation of liposomes as they translocate through the nanopores. Comparing our results with the findings from electrodeformation experiments, we demonstrated that the rigidity of liposomes can be qualitatively compared using resistive pulse characteristics. This application of nanopores can provide new opportunities to study the mechanics at the nanoscale, to investigate properties of great value in fundamental biophysics and cellular mechanobiology, such as virus deformability and fusogenicity, and in applied sciences for designing novel drug/gene delivery systems.
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Affiliation(s)
- Armin Darvish
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, USA.
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22
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Weatherall E, Hauer P, Vogel R, Willmott GR. Pulse Size Distributions in Tunable Resistive Pulse Sensing. Anal Chem 2016; 88:8648-56. [DOI: 10.1021/acs.analchem.6b01818] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | | | - Robert Vogel
- Izon Science Limited, 8C Homersham Place, P.O. Box 39168,
Burnside, Christchurch 8053, New Zealand
- School
of Mathematics and Physics, The University of Queensland, Brisbane 4072, Australia
| | - Geoff R. Willmott
- The
Departments of Physics and Chemistry, The University of Auckland, Auckland 1142, New Zealand
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23
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Sivakumaran M, Platt M. Tunable resistive pulse sensing: potential applications in nanomedicine. Nanomedicine (Lond) 2016; 11:2197-214. [PMID: 27480794 DOI: 10.2217/nnm-2016-0097] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
An accurate characterization of nanomaterials used in clinical diagnosis and therapeutics is of paramount importance to realize the full potential of nanotechnology in medicine and to avoid unexpected and potentially harmful toxic effects due to these materials. A number of technical modalities are currently in use to study the physical, chemical and biological properties of nanomaterials but they all have advantages and disadvantages. In this review, we discuss the potential of a relative newcomer, tunable resistive pulse sensing, for the characterization of nanomaterials and its applications in nanodiagnostics.
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Affiliation(s)
| | - Mark Platt
- Department of Chemistry, Loughborough University, Loughborough, LE11 3TU, UK
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24
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Yeh SH, Chou KH, Yang RJ. Sample pre-concentration with high enrichment factors at a fixed location in paper-based microfluidic devices. LAB ON A CHIP 2016; 16:925-31. [PMID: 26876347 DOI: 10.1039/c5lc01365h] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The lack of sensitivity is a major problem among microfluidic paper-based analytical devices (μPADs) for early disease detection and diagnosis. Accordingly, the present study presents a method for improving the enrichment factor of low-concentration biomarkers by using shallow paper-based channels realized through a double-sided wax-printing process. In addition, the enrichment factor is further enhanced by exploiting the ion concentration polarization (ICP) effect on the cathodic side of the nanoporous membrane, in which a stationary sample plug is obtained. The occurrence of ICP on the shallow-channel μPAD is confirmed by measuring the current-voltage response as the external voltage is increased from 0 to 210 V (or the field strength from 0 to 1.05 × 10(4) V m(-1)) over 600 s. In addition, to the best of our knowledge, the electroosmotic flow (EOF) speed on the μPAD fabricated with a wax-channel is measured for the first time using a current monitoring method. The experimental results show that for a fluorescein sample, the concentration factor is increased from 130-fold in a conventional full-thickness paper channel to 944-fold in the proposed shallow channel. Furthermore, for a fluorescein isothiocyanate-labeled bovine serum albumin (FITC-BSA) sample, the proposed shallow-channel μPAD achieves an 835-fold improvement in the concentration factor. The concentration technique presented here provides a novel strategy for enhancing the detection sensitivity of μPAD applications.
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Affiliation(s)
- Shih-Hao Yeh
- Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan.
| | - Kuang-Hua Chou
- Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan.
| | - Ruey-Jen Yang
- Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan.
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25
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Edwards MA, German SR, Dick JE, Bard AJ, White HS. High-Speed Multipass Coulter Counter with Ultrahigh Resolution. ACS NANO 2015; 9:12274-12282. [PMID: 26549738 DOI: 10.1021/acsnano.5b05554] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Coulter counters measure the size of particles in solution by passing them through an orifice and measuring a resistive pulse, i.e., a drop in the ionic current flowing between two electrodes placed on either side of the orifice. The magnitude of the pulse gives information on the size of the particle; however, resolution is limited by variability in the path of the translocation, due to the Brownian motion of the particle. We present a simple yet powerful modified Coulter counter that uses programmable data acquisition hardware to switch the voltage after sensing the resistive pulse of a nanoparticle passing through the orifice of a nanopipet. Switching the voltage reverses the direction of the driving force on the particle and, when this detect-switch cycle is repeated, allows us to pass an individual nanoparticle through the orifice thousands of times. By measuring individual particles more than 100 times per second we rapidly determine the distribution of the resistive pulses for each particle, which allows us to accurately determine the mean pulse amplitude and deliver considerably improved size resolution over a conventional Coulter counter. We show that single polystyrene nanoparticles can be shuttled back and forth and monitored for minutes, leading to a precisely determined mean blocking current equating to sub-angstrom size resolution.
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Affiliation(s)
- Martin A Edwards
- Department of Chemistry, University of Utah , Salt Lake City, Utah 84112, United States
| | - Sean R German
- Department of Chemistry, University of Utah , Salt Lake City, Utah 84112, United States
- Revalesio Corporation , 1200 East D Street, Tacoma, Washington 98421, United States
| | - Jeffrey E Dick
- Center for Electrochemistry, Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Allen J Bard
- Center for Electrochemistry, Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Henry S White
- Department of Chemistry, University of Utah , Salt Lake City, Utah 84112, United States
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26
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Zhang X, Wang J, He X, Chen L, Zhang Y. Tailor-Made Boronic Acid Functionalized Magnetic Nanoparticles with a Tunable Polymer Shell-Assisted for the Selective Enrichment of Glycoproteins/Glycopeptides. ACS APPLIED MATERIALS & INTERFACES 2015; 7:24576-84. [PMID: 26479332 DOI: 10.1021/acsami.5b06445] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Biomedical sciences, and in particular biomarker research, demand efficient glycoproteins enrichment platforms. In this work, we present a facile and time-saving method to synthesize phenylboronic acid and copolymer multifunctionalized magnetic nanoparticles (NPs) using a distillation-precipitation polymerization (DPP) technique. The polymer shell is obtained through copolymerization of two monomers-affinity ligand 3-acrylaminophenylboronic acid (AAPBA) and a hydrophilic functional monomer. The resulting hydrophilic Fe3O4@P(AAPBA-co-monomer) NPs exhibit an enhanced binding capacity toward glycoproteins by an additional functional monomer complementary to the surface presentation of the target protein. The effects of monomer ratio of AAPBA to hydrophilic comonomers on the binding of glycoproteins are systematically investigated. The morphology, structure, and composition of all the synthesized microspheres are characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and vibrating sample magnetometer (VSM). The hydrophilic Fe3O4@P(AAPBA-co-monomer) microspheres show an excellent performance in the separation of glycoproteins with high binding capacity; And strong magnetic response allows them to be easily separated from solution in the presence of an external magnetic field. Moreover, both synthetic Fe3O4@P(AAPBA) and copolymeric NPs show good adsorption to glycoproteins in physiological conditions (pH 7.4). The Fe3O4@P(AAPBA-co-monomer) NPs are successfully utilized to selectively capture and identify the low-abundance glycopeptides from the tryptic digest of horseradish peroxidase (HRP). In addition, the selective isolation and enrichment of glycoproteins from the egg white samples at physiological condition is obtained by Fe3O4@P(AAPBA-co-monomer) NPs as adsorbents.
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Affiliation(s)
- Xihao Zhang
- Research Center for Analytical Sciences, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
| | - Jiewen Wang
- Research Center for Analytical Sciences, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
| | - Xiwen He
- Research Center for Analytical Sciences, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
| | - Langxing Chen
- Research Center for Analytical Sciences, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
| | - Yukui Zhang
- Research Center for Analytical Sciences, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116011, China
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27
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Qiu Y, Yang C, Hinkle P, Vlassiouk IV, Siwy ZS. Anomalous Mobility of Highly Charged Particles in Pores. Anal Chem 2015; 87:8517-23. [DOI: 10.1021/acs.analchem.5b02060] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yinghua Qiu
- School
of Mechanical Engineering and Jiangsu Key Laboratory for Design and
Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China
| | | | | | - Ivan V. Vlassiouk
- Oak Ridge National Laboratory, Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
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28
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29
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Qiu Y, Hinkle P, Yang C, Bakker HE, Schiel M, Wang H, Melnikov D, Gracheva M, Toimil-Molares ME, Imhof A, Siwy ZS. Pores with longitudinal irregularities distinguish objects by shape. ACS NANO 2015; 9:4390-4397. [PMID: 25787224 DOI: 10.1021/acsnano.5b00877] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The resistive-pulse technique has been used to detect and size objects which pass through a single pore. The amplitude of the ion current change observed when a particle is in the pore is correlated with the particle volume. Up to date, however, the resistive-pulse approach has not been able to distinguish between objects of similar volume but different shapes. In this manuscript, we propose using pores with longitudinal irregularities as a sensitive tool capable of distinguishing spherical and rod-shaped particles with different lengths. The ion current modulations within resulting resistive pulses carry information on the length of passing objects. The performed experiments also indicate the rods rotate while translocating, and displace an effective volume that is larger than their geometrical volume, and which also depends on the pore diameter.
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Affiliation(s)
- Yinghua Qiu
- †Department of Physics and Astronomy, University of California, Irvine, California 92697, United States
- ‡School of Mechanical Engineering and Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China
| | - Preston Hinkle
- †Department of Physics and Astronomy, University of California, Irvine, California 92697, United States
| | - Crystal Yang
- §Department of Chemistry, University of California, Irvine, California 92697, United States
| | - Henriette E Bakker
- ∥Soft Condensed Matter, Debye Institute for NanoMaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Matthew Schiel
- †Department of Physics and Astronomy, University of California, Irvine, California 92697, United States
| | - Hong Wang
- ⊥Department of Physics, Nankai University, Tianjin 300457, China
| | - Dmitriy Melnikov
- #Department of Physics, Clarkson University, Potsdam New York 13699, United States
| | - Maria Gracheva
- #Department of Physics, Clarkson University, Potsdam New York 13699, United States
| | | | - Arnout Imhof
- ∥Soft Condensed Matter, Debye Institute for NanoMaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Zuzanna S Siwy
- †Department of Physics and Astronomy, University of California, Irvine, California 92697, United States
- §Department of Chemistry, University of California, Irvine, California 92697, United States
- ⊗Department of Biomedical Engineering, University of California, Irvine, California 92697, United States
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30
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Weatherall E, Willmott GR. Conductive and Biphasic Pulses in Tunable Resistive Pulse Sensing. J Phys Chem B 2015; 119:5328-35. [DOI: 10.1021/acs.jpcb.5b00344] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eva Weatherall
- The MacDiarmid
Institute for Advanced Materials and Nanotechnology, School of Chemical
and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
- Callaghan Innovation, PO Box 31-310, Lower
Hutt 5040, New Zealand
| | - Geoff R. Willmott
- The MacDiarmid
Institute for Advanced Materials and Nanotechnology, School of Chemical
and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
- The
Departments of Physics and Chemistry, The University of Auckland, Private Bag 92019, Auckland, New Zealand
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31
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Mei L, Yeh LH, Qian S. Buffer effect on the ionic conductance in a pH-regulated nanochannel. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2014.12.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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32
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Goyal G, Darvish A, Kim MJ. Use of solid-state nanopores for sensing co-translocational deformation of nano-liposomes. Analyst 2015; 140:4865-73. [DOI: 10.1039/c5an00250h] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This works reports detection of electric field and hydrodynamic stress induced deformation of sub-100 nm liposomes during translocation through solid-state nanopore.
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Affiliation(s)
- Gaurav Goyal
- School of Biomedical Engineering
- Science and Health Systems
- Drexel University
- Philadelphia
- USA
| | - Armin Darvish
- School of Biomedical Engineering
- Science and Health Systems
- Drexel University
- Philadelphia
- USA
| | - Min Jun Kim
- School of Biomedical Engineering
- Science and Health Systems
- Drexel University
- Philadelphia
- USA
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33
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Abstract
This Review focusses on the recent surge in applied research using tunable resistive pulse sensing, a technique used to analyse submicron colloids in aqueous solutions on a particle-by-particle basis.
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Affiliation(s)
- Eva Weatherall
- The MacDiarmid Institute for Advanced Materials and Nanotechnology
- School of Chemical and Physical Sciences
- Victoria University of Wellington
- New Zealand
- Callaghan Innovation
| | - Geoff R. Willmott
- The MacDiarmid Institute for Advanced Materials and Nanotechnology
- School of Chemical and Physical Sciences
- Victoria University of Wellington
- New Zealand
- The Departments of Physics and Chemistry
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Haywood DG, Saha-Shah A, Baker LA, Jacobson SC. Fundamental studies of nanofluidics: nanopores, nanochannels, and nanopipets. Anal Chem 2014; 87:172-87. [PMID: 25405581 PMCID: PMC4287834 DOI: 10.1021/ac504180h] [Citation(s) in RCA: 157] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Daniel G Haywood
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405-7102, United States
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Atalay S, Yeh LH, Qian S. Proton enhancement in an extended nanochannel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:13116-13120. [PMID: 25295700 DOI: 10.1021/la503323z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Proton enhancement in an extended nanochannel is investigated by a continuum model consisting of three-dimensional Poisson-Nernst-Planck equations for the ionic mass transport of multiple ionic species with the consideration of surface chemistry on the nanochannel wall. The model is validated by the existing experimental data of the proton distribution inside an extended silica nanochannel. The proton enhancement behavior depends substantially on the background salt concentration, pH, and dimensions of the nanochannel. The proton enrichment at the center of the nanochannel is significant when the bulk pH is medium high (ca. 8) and the salt concentration is relatively low. The results gathered are informative for the development of biomimetic nanofluidic apparatuses and the interpretation of relevant experimental data.
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Affiliation(s)
- Selcuk Atalay
- Institute of Micro/Nanotechnology, Old Dominion University , Norfolk, Virginia 23529, United States
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36
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Innes L, Chen CH, Schiel M, Pevarnik M, Haurais F, Toimil-Molares ME, Vlassiouk I, Theogarajan L, Siwy ZS. Velocity profiles in pores with undulating opening diameter and their importance for resistive-pulse experiments. Anal Chem 2014; 86:10445-53. [PMID: 25245282 PMCID: PMC4204914 DOI: 10.1021/ac502997h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 09/23/2014] [Indexed: 12/13/2022]
Abstract
Pores with undulating opening diameters have emerged as an analytical tool enhancing the speed of resistive-pulse experiments, with a potential to simultaneously characterize size and mechanical properties of translocating objects. In this work, we present a detailed study of the characteristics of resistive-pulses of charged and uncharged polymer particles in pores with different aspect ratios and pore topography. Although no external pressure difference was applied, our experiments and modeling indicated the existence of local pressure drops, which modified axial and radial velocities of the solution. As a consequence of the complex velocity profiles, pores with undulating pore diameter and low-aspect ratio exhibited large dispersion of the translocation times. Distribution of the pulse amplitude, which is a measure of the object size, was not significantly affected by the pore topography. The importance of tuning pore geometry for the application in resistive-sensing and multipronged characterization of physical properties of translocating objects is discussed.
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Affiliation(s)
- Laura
M. Innes
- Department
of Physics and Astronomy, University of
California, Irvine, California 92697, United States
| | - Chin-Hsuan Chen
- Department
of Electrical and Computer Engineering, University of California, Santa
Barbara, California 93106, United States
| | - Matthew Schiel
- Department
of Physics and Astronomy, University of
California, Irvine, California 92697, United States
- Department
of Bioengineering, University of California, Irvine, California 92697, United States
| | - Matthew Pevarnik
- Department
of Electrical and Computer Engineering, University of California, Santa
Barbara, California 93106, United States
| | - Florian Haurais
- Department
of Materials Science, GSI Helmholtz Center
for Heavy Ion Research, Darmstadt, Germany
| | | | - Ivan Vlassiouk
- Oak
Ridge National Laboratory, Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
| | - Luke Theogarajan
- Department
of Electrical and Computer Engineering, University of California, Santa
Barbara, California 93106, United States
| | - Zuzanna S. Siwy
- Department
of Physics and Astronomy, University of
California, Irvine, California 92697, United States
- Department
of Bioengineering, University of California, Irvine, California 92697, United States
- Department
of Chemistry, University of California, Irvine, California 92697, United States
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Gong MM, Zhang P, MacDonald BD, Sinton D. Nanoporous Membranes Enable Concentration and Transport in Fully Wet Paper-Based Assays. Anal Chem 2014; 86:8090-7. [DOI: 10.1021/ac502597v] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Max M. Gong
- Department
of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canada
| | - Pei Zhang
- Department
of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canada
| | - Brendan D. MacDonald
- Faculty
of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - David Sinton
- Department
of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canada
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Li X, Zhi D, Hu J, Xu S, Liu H, Hu Y. Synthesis of mesoporous silica-gel core-shell structural microparticles and their multiple drug delivery. Drug Deliv 2013; 22:69-78. [DOI: 10.3109/10717544.2013.859768] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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