1
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Peinetti AS, Cortez ML, Toimil-Molares ME, Azzaroni O. Nanoprecipitation-Enhanced Sensitivity in Enzymatic Nanofluidic Biosensors. Anal Chem 2024; 96:5282-5288. [PMID: 38513049 DOI: 10.1021/acs.analchem.4c00203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Single nanochannels show unique transport properties due to nanoconfinement. It has been demonstrated that at submillimolar concentrations of divalent cations, a nanoprecipitation reaction can occur in nanochannels. Although several reports have shown, described, and modeled the nanoprecipitation process, no further advantages have been taken from this phenomenon. Here, we show that the nanoprecipitation reaction can be incorporated into enzyme-modified nanochannels to enhance the performance of small-molecule biosensors via in situ amplification reactions. Contrary to the working principle of previous enzymatic nanofluidic biosensors, the nanofluidic biosensor described in this work operates on the basis of concerted functions: pH-shifting enzymatic activity and nanoprecipitation. We show that the simple addition of Ca2+ and Mg2+ ions in the working analyte solution containing urea can lower the detection limit from the nanometer to the subnanometer regime and modulate the dynamic linear range. This approach enables the implementation of more sensitive real-time nanofluidic detection methods without increasing the complexity of the nanofluidic platform or the sensing approach. We envision that the integration of concerted functions in nanofluidic architectures will play a key role in expanding the use of these nanoscale devices for analytical purposes.
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Affiliation(s)
- Ana S Peinetti
- INQUIMAE (CONICET)─Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, C1428EHA Buenos Aires, Argentina
| | - M Lorena Cortez
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CONICET, Boulevard 113 y 64, 1900 La Plata, Argentina
| | - Maria Eugenia Toimil-Molares
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- Technische Universitat Darmstadt, 64287 Darmstadt, Germany
| | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CONICET, Boulevard 113 y 64, 1900 La Plata, Argentina
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2
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Cervera J, Ramirez P, Nasir S, Ali M, Ensinger W, Siwy ZS, Mafe S. Cation pumping against a concentration gradient in conical nanopores characterized by load capacitors. Bioelectrochemistry 2023; 152:108445. [PMID: 37086711 DOI: 10.1016/j.bioelechem.2023.108445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/04/2023] [Accepted: 04/11/2023] [Indexed: 04/24/2023]
Abstract
We study the cation transport against an external concentration gradient (cation pumping) that occurs in conical nanopores when zero-average oscillatory and white noise potentials are externally applied. This pumping, based on the electrically asymmetric nanostructure, is characterized here by a load capacitor arrangement. In the case of white noise signals, the conical nanopore acts as an electrical valve that allows extraction of order from chaos. No molecular carriers, specific ion pumps, and competitive ion-binding phenomena are required. The nanopore conductance on/off states mimic those of the voltage-gated ion channels in the cell membrane. These channels allow modulating membrane potentials and ionic concentration gradients along oscillatory pulses in circadian rhythms and the cell cycle. We show that the combination of asymmetric nanostructures with load capacitors can be useful for the understanding of nanofluidic processes based on bioelectrochemical gradients.
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Affiliation(s)
- Javier Cervera
- Departament de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain.
| | - Patricio Ramirez
- Departament de Física Aplicada, Universitat Politècnica de València, E-46022 València, Spain
| | - Saima Nasir
- Materials Research Department, GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany; Department of Material- and Geo-Sciences, Technische Universität Darmstadt, D-64287 Darmstadt, Germany
| | - Mubarak Ali
- Materials Research Department, GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany; Department of Material- and Geo-Sciences, Technische Universität Darmstadt, D-64287 Darmstadt, Germany
| | - Wolfgang Ensinger
- Department of Material- and Geo-Sciences, Technische Universität Darmstadt, D-64287 Darmstadt, Germany
| | - Zuzanna S Siwy
- Department of Physics and Astronomy, Department of Chemistry, Department of Biomedical Engineering, University of California, Irvine, CA 92697, USA
| | - Salvador Mafe
- Departament de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain.
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3
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Cutroneo M, Havranek V, Mackova A, Malinsky P, Miksova R, Ceccio G, Ando’ L, Michalcova A. Overview of Polyethylene Terephthalate Foils Patterned Using 10 MeV Carbon Ions for Realization of Micromembranes. MICROMACHINES 2023; 14:284. [PMID: 36837984 PMCID: PMC9964241 DOI: 10.3390/mi14020284] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/18/2023] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Polymer membranes are conventionally prepared using high-energy particles from radioactive decay or by the bombardment of hundreds of MeVs energy ions. In both circumstances, tracks of damage are produced by particles/ions passing through the polymer, and successively, the damaged material is removed by chemical etching to create narrow pores. This process ensures nanosized pore diameter but with random placement, leading to non-uniform local pore density and low membrane porosity, which is necessary to reduce the risk of their overlapping. The present study is focused on the use of polyethylene terephthalate (PET) foils irradiated by 10.0 MeV carbon ions, easily achievable with ordinary ion accelerators. The ion irradiation conditions and the chemical etching conditions were monitored to obtain customized pore locations without pore overlapping in PET. The quality, shape, and size of the pores generated in the micromembranes can have a large impact on their applicability. In this view, the Scanning Transmission Ion Microscopy coupled with a computer code created in our laboratory was implemented to acquire new visual and quantitative insights on fabricated membranes.
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Affiliation(s)
- Mariapompea Cutroneo
- Nuclear Physics Institute, The Czech Academy of Sciences (CAS), 25068 Rez, Czech Republic
| | - Vladimir Havranek
- Nuclear Physics Institute, The Czech Academy of Sciences (CAS), 25068 Rez, Czech Republic
| | - Anna Mackova
- Nuclear Physics Institute, The Czech Academy of Sciences (CAS), 25068 Rez, Czech Republic
- Department of Physics, Faculty of Science, University of J. E. Purkyně, Pasteurova 3544/1, 40096 Ústí nad Labem, Czech Republic
| | - Petr Malinsky
- Nuclear Physics Institute, The Czech Academy of Sciences (CAS), 25068 Rez, Czech Republic
- Department of Physics, Faculty of Science, University of J. E. Purkyně, Pasteurova 3544/1, 40096 Ústí nad Labem, Czech Republic
| | - Romana Miksova
- Nuclear Physics Institute, The Czech Academy of Sciences (CAS), 25068 Rez, Czech Republic
| | - Giovanni Ceccio
- Nuclear Physics Institute, The Czech Academy of Sciences (CAS), 25068 Rez, Czech Republic
| | - Lucio Ando’
- National Institute of Nuclear Physics-INFN, Sezione di Catania, Via S. Sofia 64, 95123 Catania, Italy
| | - Alena Michalcova
- Department of Metals and Corrosion Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
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4
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Cutroneo M, Hnatowicz V, Mackova A, Malinsky P, Miksova R, Ceccio G, Maly J, Smejkal J, Štofik M, Havranek V. Ion Lithography of Single Ions Irradiation for Spatially Regular Arrays of Pores in Membranes of Polyethylene Terephthalate. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3927. [PMID: 36432215 PMCID: PMC9697708 DOI: 10.3390/nano12223927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/01/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
Routinely, in membrane technology, the decay from radioactive particles or the bombardment of ions with MeV energy per nucleon have been employed for the production of narrow and long pores in membranes. Presently, the ion lithography is proposed to make the fabrication cost more affordable. It is prospective for the use of medium capacity accelerators making more feasible the fabrication of customized membranes. Thin polyethylene terephthalate foils have been patterned using 12 MeV O5+ ions and then processed to obtain good aspect ratio ion track pores in membranes. Pores of micrometric diameter with the following profiles were fabricated in the membranes: truncated cone, double conical, ideal cone, and cylindrical. Monitoring of the shape and size of pores has been attempted with a combination of Scanning Transmission Ion Microscope and a newly designed simulation program. This study is focused on the use of low-energy ions, accomplished in all laboratories, for the fabrication of membranes where the pores are not randomly traced and exhibit higher surface density and negligible overlapping than in membranes commonly manufactured. The good reproducibility and the ordered pore locations can be potentially utilized in applications such as microfluidics and organ-on-chip microsystems, where cells growing over porous substrates are used in simulation of biological barriers and transport processes.
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Affiliation(s)
| | | | - Anna Mackova
- Nuclear Physics Institute AS CR, Hlavni 130, 25068 Rez, Czech Republic
- Department of Physics, Faculty of Science, University of J. E. Purkyně, Pasteurova 3544/1, 40096 Ústí nad Labem, Czech Republic
| | - Petr Malinsky
- Nuclear Physics Institute AS CR, Hlavni 130, 25068 Rez, Czech Republic
- Department of Physics, Faculty of Science, University of J. E. Purkyně, Pasteurova 3544/1, 40096 Ústí nad Labem, Czech Republic
| | - Romana Miksova
- Nuclear Physics Institute AS CR, Hlavni 130, 25068 Rez, Czech Republic
| | - Giovanni Ceccio
- Nuclear Physics Institute AS CR, Hlavni 130, 25068 Rez, Czech Republic
| | - Jan Maly
- Centre of Nanomaterials and Biotechnology, Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, 40096 Ústí nad Labem, Czech Republic
| | - Jiří Smejkal
- Centre of Nanomaterials and Biotechnology, Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, 40096 Ústí nad Labem, Czech Republic
| | - Marcel Štofik
- Centre of Nanomaterials and Biotechnology, Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, 40096 Ústí nad Labem, Czech Republic
| | - Vladimir Havranek
- Nuclear Physics Institute AS CR, Hlavni 130, 25068 Rez, Czech Republic
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5
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Apel PY, Velizarov S, Volkov AV, Eliseeva TV, Nikonenko VV, Parshina AV, Pismenskaya ND, Popov KI, Yaroslavtsev AB. Fouling and Membrane Degradation in Electromembrane and Baromembrane Processes. MEMBRANES AND MEMBRANE TECHNOLOGIES 2022. [DOI: 10.1134/s2517751622020032] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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6
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Wang X, Dutt S, Notthoff C, Kiy A, Mota-Santiago P, Mudie ST, Toimil-Molares ME, Liu F, Wang Y, Kluth P. SAXS data modelling for the characterisation of ion tracks in polymers. Phys Chem Chem Phys 2022; 24:9345-9359. [PMID: 35383785 DOI: 10.1039/d1cp05813d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here, we present new models to fit small angle X-ray scattering (SAXS) data for the characterization of ion tracks in polymers. Ion tracks in polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI) and polymethyl methacrylate (PMMA) were created by swift heavy ion irradiation using 197Au and 238U with energies between 185 MeV and 2.0 GeV. Transmission SAXS measurements were performed at the Australian Synchrotron. SAXS data were analysed using two new models that describe the tracks by a cylindrical structure composed of a highly damaged core with a gradual transition to the undamaged material. First, we investigate the 'Soft Cylinder Model', which assumes a smooth function to describe the transition region by a gradual change in density from a core to a matrix. As a simplified and computational less expensive version of the 'Soft Cylinder Model', the 'Core Transition Model' was developed to enable fast fitting. This model assumes a linear increase in density from the core to the matrix. Both models yield superior fits to the experimental SAXS data compared with the often-used simple 'Hard Cylinder Model' assuming a constant density with an abrupt transition.
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Affiliation(s)
- Xue Wang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China.,Department of Materials Physics, Research School of Physics, Australian National University, Canberra ACT 2601, Australia.
| | - Shankar Dutt
- Department of Materials Physics, Research School of Physics, Australian National University, Canberra ACT 2601, Australia.
| | - Christian Notthoff
- Department of Materials Physics, Research School of Physics, Australian National University, Canberra ACT 2601, Australia.
| | - Alexander Kiy
- Department of Materials Physics, Research School of Physics, Australian National University, Canberra ACT 2601, Australia.
| | - Pablo Mota-Santiago
- Australian Synchrotron, ANSTO, 800 Blackburn Rd, Clayton, Victoria 3168, Australia
| | - Stephen T Mudie
- Australian Synchrotron, ANSTO, 800 Blackburn Rd, Clayton, Victoria 3168, Australia
| | - Maria E Toimil-Molares
- GSI Helmholtzzentrum für Schwerionenforschung (GSI), Planckstr. 1, D-64291, Darmstadt, Germany
| | - Feng Liu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China.,Center for Quantitative Biology, Peking University, Beijing 100871, People's Republic of China
| | - Yugang Wang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China
| | - Patrick Kluth
- Department of Materials Physics, Research School of Physics, Australian National University, Canberra ACT 2601, Australia.
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7
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Liu TJ, Ma T, Lin CY, Balme S, Hsu JP. Origin of Ultrahigh Rectification in Polyelectrolyte Bilayers Modified Conical Nanopores. J Phys Chem Lett 2021; 12:11858-11864. [PMID: 34874161 DOI: 10.1021/acs.jpclett.1c03513] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The switching of "ON" and "OFF" states of an ionic diode is investigated by considering a conical nanopore partially functionalized two polyelectrolyte (PE) layers via layer-by-layer deposition. Through observing the inversion of its rectification behavior, we demonstrate the function of the PE bilayers in ionic transport regulation. The ionic diode exhibits an ultrahigh ion rectification at a low level of pH. In an aqueous NaCl solution at pH 2, for example, the ratio of the current at "ON" state and that at "OFF" state can be about 800 and 200 for 1 and 100 mM, respectively. This remarkable gating behavior can be explained by the anion-pump-induced ion accumulation in the neutral region as well as the depletion zone at the interface. Our results further demonstrate the possibility of achieving an ultrahigh rectification in an ionic diode having a unipolar-like configuration.
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Affiliation(s)
- Tien-Juin Liu
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Tianji Ma
- Institut Européen des Membranes, UMR5635 UM ENSM CNRS, Place Eugène Bataillon, 34095 CEDEX 5 Montpellier, France
| | - Chih-Yuan Lin
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Sébastien Balme
- Institut Européen des Membranes, UMR5635 UM ENSM CNRS, Place Eugène Bataillon, 34095 CEDEX 5 Montpellier, France
| | - Jyh-Ping Hsu
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
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8
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Recent Progress in the Membrane Distillation and Impact of Track-Etched Membranes. Polymers (Basel) 2021; 13:polym13152520. [PMID: 34372131 PMCID: PMC8347132 DOI: 10.3390/polym13152520] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/25/2021] [Accepted: 07/26/2021] [Indexed: 11/19/2022] Open
Abstract
Membrane distillation (MD) is a rapidly developing field of research and finds applications in desalination of water, purification from nonvolatile substances, and concentration of various solutions. This review presents data from recent studies on the MD process, MD configuration, the type of membranes and membrane hydrophobization. Particular importance has been placed on the methods of hydrophobization and the use of track-etched membranes (TeMs) in the MD process. Hydrophobic TeMs based on poly(ethylene terephthalate) (PET), poly(vinylidene fluoride) (PVDF) and polycarbonate (PC) have been applied in the purification of water from salts and pesticides, as well as in the concentration of low-level liquid radioactive waste (LLLRW). Such membranes are characterized by a narrow pore size distribution, precise values of the number of pores per unit area and narrow thickness. These properties of membranes allow them to be used for more accurate water purification and as model membranes used to test theoretical models (for instance LEP prediction).
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9
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Wang C, Sensale S, Pan Z, Senapati S, Chang HC. Slowing down DNA translocation through solid-state nanopores by edge-field leakage. Nat Commun 2021; 12:140. [PMID: 33420061 PMCID: PMC7794543 DOI: 10.1038/s41467-020-20409-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/23/2020] [Indexed: 01/26/2023] Open
Abstract
Solid-state nanopores allow high-throughput single-molecule detection but identifying and even registering all translocating small molecules remain key challenges due to their high translocation speeds. We show here the same electric field that drives the molecules into the pore can be redirected to selectively pin and delay their transport. A thin high-permittivity dielectric coating on bullet-shaped polymer nanopores permits electric field leakage at the pore tip to produce a voltage-dependent surface field on the entry side that can reversibly edge-pin molecules. This mechanism renders molecular entry an activated process with sensitive exponential dependence on the bias voltage and molecular rigidity. This sensitivity allows us to selectively prolong the translocation time of short single-stranded DNA molecules by up to 5 orders of magnitude, to as long as minutes, allowing discrimination against their double-stranded duplexes with 97% confidence.
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Affiliation(s)
- Ceming Wang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, USA
| | - Sebastian Sensale
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, USA
| | - Zehao Pan
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, USA
| | - Satyajyoti Senapati
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, USA
| | - Hsueh-Chia Chang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, USA.
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, USA.
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10
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Blonskaya I, Lizunov N, Olejniczak K, Orelovich O, Yamauchi Y, Toimil-Molares M, Trautmann C, Apel P. Elucidating the roles of diffusion and osmotic flow in controlling the geometry of nanochannels in asymmetric track-etched membranes. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118657] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Su S, Guo X, Fu Y, Xie Y, Wang X, Xue J. Origin of nonequilibrium 1/f noise in solid-state nanopores. NANOSCALE 2020; 12:8975-8981. [PMID: 32270161 DOI: 10.1039/c9nr09829a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nanopore devices are applied in many fields such as molecular sensing and DNA sequencing, and the detection precision is primarily determined by 1/f noise. The mechanism of 1/f noise in nanopores is still not clearly understood, especially the nonequilibrium 1/f noise in rectifying nanopores. Hereby, we propose that 1/f noise in solid-state nanopores originates from the electrolyte ion trapping-detrapping process occurring on the inner surface of the nanopores, which can nonlinearly affect the ion number inside the rectifying nanopores due to the specific ion enrichment/depletion effect. Our model can not only quantitatively explain the nonlinear dependence of 1/f noise on the applied voltage, i.e., the nonequilibrium 1/f noise, for current rectifying nanopores, but also provide a unified explanation on the influence of the electrolyte concentration, pH value, and geometry of the nanopores. From our model, we observe a new flattening phenomenon of 1/f noise in conical nanopores, and this is further confirmed by our experimental results. Our research can be helpful in understanding and reducing 1/f noise in other nanopore devices, especially where the enrichment or depletion of ions exists.
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Affiliation(s)
- Shihao Su
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, P. R. China.
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12
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Apel PY, Blonskaya IV, Ivanov OM, Kristavchuk OV, Lizunov NE, Nechaev AN, Orelovich OL, Polezhaeva OA, Dmitriev SN. Creation of Ion-Selective Membranes from Polyethylene Terephthalate Films Irradiated with Heavy Ions: Critical Parameters of the Process. MEMBRANES AND MEMBRANE TECHNOLOGIES 2020. [DOI: 10.1134/s251775162002002x] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Olmos CM, Rosero G, Fernández-Cabada T, Booth R, Der M, Cabaleiro JM, Debut A, Cumbal L, Pérez MS, Lerner B. Hybrid microchannel-solid state micropore device for fast and optical cell detection. RSC Adv 2020; 10:5361-5370. [PMID: 35498312 PMCID: PMC9049143 DOI: 10.1039/c9ra09939e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 01/20/2020] [Indexed: 11/28/2022] Open
Abstract
This paper presents a methodology for cell detection and counting using a device that combines PDMS (polydimethylsiloxane) microfluidic multilayer channels with a single solid state micropore. Optimal conditions of solid-state micropore fabrication from crystalline silicon wafers are presented. Micropores of varying size can be obtained by directly etching using an etchant agent concentration of 50 wt% KOH, at varying temperatures (40, 60, 80 °C) and voltages (100, 500, 1000 mV). Scanning Electron Microscopy (SEM), and profilometry techniques have been used for the micropore characterization. In order to find optimal conditions for cell detection a COMSOL Multiphysics simulation was performed. Pressure drop, shear stress, fluid viscosities and flow rates parameters were evaluated. The potential viability of the device for cell detection and counting, avoiding cellular damage, is demonstrated. This paper presents a methodology for cell detection and counting using a device that combines PDMS (polydimethylsiloxane) microfluidic multilayer channels with a single solid state micropore.![]()
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Affiliation(s)
- Carol M. Olmos
- Facultad Regional Haedo
- Universidad Tecnológica Nacional (UTN)
- Haedo
- Argentina
| | - Gustavo Rosero
- Facultad Regional Haedo
- Universidad Tecnológica Nacional (UTN)
- Haedo
- Argentina
| | | | | | - Manuel Der
- Departamento de Física
- Facultad de Ciencias Exactas y Naturales
- Universidad de Buenos Aires (UBA)
- Cuidad Universitaria
- Buenos Aires
| | - Juan M. Cabaleiro
- CONICET-Fluid Dynamics Laboratory
- Facultad de ingeniería
- Universidad de Buenos Aires (UBA)
- Buenos Aires
- Argentina
| | - Alexis Debut
- Centro de Nanociencia y Nanotecnología
- Universidad de las Fuerzas Armadas ESPE
- Sangolquí
- Ecuador
| | - Luis Cumbal
- Centro de Nanociencia y Nanotecnología
- Universidad de las Fuerzas Armadas ESPE
- Sangolquí
- Ecuador
| | - Maximiliano S. Pérez
- Facultad Regional Haedo
- Universidad Tecnológica Nacional (UTN)
- Haedo
- Argentina
- Instituto de Ingeniería Biomédica
| | - Betiana Lerner
- Facultad Regional Haedo
- Universidad Tecnológica Nacional (UTN)
- Haedo
- Argentina
- Department of Electrical and Computer Engineering
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14
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Apel PY. Fabrication of functional micro- and nanoporous materials from polymers modified by swift heavy ions. Radiat Phys Chem Oxf Engl 1993 2019. [DOI: 10.1016/j.radphyschem.2019.01.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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15
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Apel PY, Bobreshova OV, Volkov AV, Volkov VV, Nikonenko VV, Stenina IA, Filippov AN, Yampolskii YP, Yaroslavtsev AB. Prospects of Membrane Science Development. MEMBRANES AND MEMBRANE TECHNOLOGIES 2019. [DOI: 10.1134/s2517751619020021] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Yamauchi Y, Blonskaya IV, Apel PY. Osmosis in Negatively Charged Nanocapillaries and Its Enhancement by an Anionic Surfactant. COLLOID JOURNAL 2019. [DOI: 10.1134/s1061933x19010162] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Design and synthesis of polymeric membranes using water-soluble pore formers: an overview. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2616-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Apel PY, Blonskaya IV, Lizunov NE, Olejniczak K, Orelovitch OL, Toimil-Molares ME, Trautmann C. Osmotic Effects in Track-Etched Nanopores. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1703327. [PMID: 29573553 DOI: 10.1002/smll.201703327] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 02/05/2018] [Indexed: 06/08/2023]
Abstract
Asymmetrically etched ion-track membranes attract great interest for both fundamental and technical reasons because of a large variety of applications. So far, conductometric measurements during track etching provide only limited information about the complicated asymmetric etching process. In this paper, monitoring of osmotic phenomena is used to elucidate the initial phase of nanopore formation. It is shown that strong alkaline solutions generate a considerable osmotic flow of water through newborn conical pores. The interplay between diffusion and convection in the pore channel results in a substantially nonlinear alkali concentration gradient and a rapid change in the pore geometry after breakthrough. Similar phenomena are observed in experiments with cylindrical track-etched pores of 15-30 nm in radius. A theoretical description of the diffusion-convection processes in the pores is provided.
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Affiliation(s)
- Pavel Y Apel
- Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Joliot-Curie str. 6, 141980, Dubna, Russia
- Department of Chemistry, New Technologies and Materials, Dubna State University, Universitetskaya str. 19, 141980, Dubna, Russia
| | - Irina V Blonskaya
- Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Joliot-Curie str. 6, 141980, Dubna, Russia
| | - Nikolay E Lizunov
- Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Joliot-Curie str. 6, 141980, Dubna, Russia
| | - Katarzyna Olejniczak
- Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Joliot-Curie str. 6, 141980, Dubna, Russia
- Department of Chemistry, Nicolaus Copernicus University, Gagarina str. 7, 87-100, Torun, Poland
| | - Oleg L Orelovitch
- Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Joliot-Curie str. 6, 141980, Dubna, Russia
| | | | - Christina Trautmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
- Materialwissenschaft, Technische Universität Darmstadt, Alarich-Weiss-Straße 2, 64287, Darmstadt, Germany
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