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Farrell EB, McNeill F, Weiss A, Duleba D, Guiry PJ, Johnson RP. The Detection of Trace Metal Contaminants in Organic Products Using Ion Current Rectifying Quartz Nanopipettes. Anal Chem 2024; 96:6055-6064. [PMID: 38569051 PMCID: PMC11024892 DOI: 10.1021/acs.analchem.4c00634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/26/2024] [Accepted: 03/20/2024] [Indexed: 04/05/2024]
Abstract
While ion current rectification (ICR) in aprotic solvent has been fundamentally studied, its application in sensing devices lacks exploration. The development of sensors operable in these solvents is highly beneficial to the chemical industry, where polar aprotic solvents, such as acetonitrile, are widely used. Currently, this industry relies on the use of inductively coupled plasma mass spectrometry (ICP-MS) and optical emission spectroscopy (OES) for the detection of metal contamination in organic products. Herein, we present the detection of trace amounts of Pd2+ and Co2+ using ion current rectification, in cyclam-functionalized quartz nanopipettes, with tetraethylammonium tetrafluoroborate (TEATFB) in MeCN as supporting electrolyte. This methodology is employed to determine the concentration of Pd in organic products, before and after purification by Celite filtration and column chromatography, obtaining comparable results to ICP-MS within minutes and without complex sample preparation. Finite element simulations are used to support our experimental findings, which reveal that the formation of double-junction diodes in the nanopore enables trace detection of these metals, with a significant response from baseline even at picomolar concentrations.
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Affiliation(s)
- Emer B. Farrell
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Fionn McNeill
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Alexander Weiss
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dominik Duleba
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Patrick J. Guiry
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Robert P. Johnson
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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2
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Qian R, Wu M, Yang Z, Wu Y, Guo W, Zhou Z, Wang X, Li D, Lu Y. Rectifying artificial nanochannels with multiple interconvertible permeability states. Nat Commun 2024; 15:2051. [PMID: 38448408 PMCID: PMC10918189 DOI: 10.1038/s41467-024-46312-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 02/16/2024] [Indexed: 03/08/2024] Open
Abstract
Transmembrane channels play a vital role in regulating the permeation process, and have inspired recent development of biomimetic channels. Herein, we report a class of artificial biomimetic nanochannels based on DNAzyme-functionalized glass nanopipettes to realize delicate control of channel permeability, whereby the surface wettability and charge can be tuned by metal ions and DNAzyme-substrates, allowing reversible conversion between different permeability states. We demonstrate that the nanochannels can be reversibly switched between four different permeability states showing distinct permeability to various functional molecules. By embedding the artificial nanochannels into the plasma membrane of single living cells, we achieve selective transport of dye molecules across the cell membrane. Finally, we report on the advanced functions including gene silencing of miR-21 in single cancer cells and selective transport of Ca2+ into single PC-12 cells. In this work, we provide a versatile tool for the design of rectifying artificial nanochannels with on-demand functions.
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Affiliation(s)
- Ruocan Qian
- Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237, P. R. China.
- Feringa Nobel Prize Scientist Joint Research Center, Joint International Laboratory for Precision Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China.
- Frontiers Science Center for Materiobiology & Dynamic Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China.
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China.
| | - Mansha Wu
- Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Feringa Nobel Prize Scientist Joint Research Center, Joint International Laboratory for Precision Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Frontiers Science Center for Materiobiology & Dynamic Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Zhenglin Yang
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712, USA
| | - Yuting Wu
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712, USA
| | - Weijie Guo
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA
| | - Zerui Zhou
- Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Feringa Nobel Prize Scientist Joint Research Center, Joint International Laboratory for Precision Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Frontiers Science Center for Materiobiology & Dynamic Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Xiaoyuan Wang
- Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Feringa Nobel Prize Scientist Joint Research Center, Joint International Laboratory for Precision Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Frontiers Science Center for Materiobiology & Dynamic Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Dawei Li
- Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Feringa Nobel Prize Scientist Joint Research Center, Joint International Laboratory for Precision Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Frontiers Science Center for Materiobiology & Dynamic Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Yi Lu
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712, USA.
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA.
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3
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Khosravikia M. Quantitative model for predicting the electroosmotic flow in dual-pole nanochannels. Electrophoresis 2023; 44:733-743. [PMID: 36808619 DOI: 10.1002/elps.202300006] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 02/07/2023] [Accepted: 02/15/2023] [Indexed: 02/20/2023]
Abstract
Developing and assessing nanofluidic systems is time-consuming and costly owing to the method's novelty; hence, modeling is essential to determine the optimal areas for implementation and to grasp its workings. In this work, we examined the influence of dual-pole surface and nanopore configuration on ion transfer simultaneously. To achieve this, the two trumpet and cigarette configuration were coated with a dual-pole soft surface so that the negative charge could be positioned in the nanopore's small aperture. Subsequently, the Poisson-Nernst-Planck and Navier-Stokes equations were simultaneously solved under steady-state circumstances using varied values physicochemical properties for the soft surface and electrolyte. The pore's selectivity was S Trumpet > S Cigarette ${S}_{{\rm{Trumpet}}} > {S}_{{\rm{Cigarette}}}$ , and the rectification factor, on the other hand, was R f Cigarette < R f Trumpet ${R}_{{f}_{{\rm{Cigarette}}}} < {R}_{{f}_{{\rm{Trumpet}}}}$ , when the overall concentration was very low. When the ion partitioning effect is taken into account, we clearly show that the rectifying variables for the cigarette configuration and the trumpet configuration can reach values of 45 and 49.2, when the charge density and mass concentration were 100 mol/m3 and 1 mM, respectively. By using dual-pole surfaces, the controllability of nanopores' rectifying behavior may be modified to produce superior separation performance.
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Affiliation(s)
- Mohammad Khosravikia
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
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4
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Yang F, Zhu Y, Zhang C, Yang Z, Yuan J, Zhu Q, Ding S. A highly sensitive and selective artificial nanochannel for in situ detection of hydroxyl radicals in single living cell. Anal Chim Acta 2022; 1235:340537. [DOI: 10.1016/j.aca.2022.340537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 10/19/2022] [Indexed: 11/16/2022]
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5
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Farrell EB, Duleba D, Johnson RP. Aprotic Solvent Accumulation Amplifies Ion Current Rectification in Conical Nanopores. J Phys Chem B 2022; 126:5689-5694. [PMID: 35867912 PMCID: PMC9358645 DOI: 10.1021/acs.jpcb.2c03172] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ion current rectification is highly reported in aqueous electrochemical systems and sensors but lacks exploration in organic systems due to the additional complexity introduced by non-aqueous solvents. Herein, a detailed study on ion current rectification with highly polar and mildly polar aprotic organic solvents as a function of tetraethylammonium tetrafluoroborate supporting electrolyte concentration is presented. To explain our experimental results, we introduce a previously unreported phenomenon: the formation of a double-junction diode within the nanopore that arises due to a complex interplay between ion and solvent enrichment effects. Finite element simulations are used to explore this phenomenon and the subsequent effect on the rectifying behavior of conical quartz nanopores.
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Affiliation(s)
- Emer B Farrell
- School of Chemistry, University College Dublin, Belfield, Dublin 4 D04 V1W8, Ireland
| | - Dominik Duleba
- School of Chemistry, University College Dublin, Belfield, Dublin 4 D04 V1W8, Ireland
| | - Robert P Johnson
- School of Chemistry, University College Dublin, Belfield, Dublin 4 D04 V1W8, Ireland
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6
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Liu D, Bian Y, Zhu Z, Shao Y, Li M. Detection of Trace Water Based on Electro-oxidation of Molybdenum Disulfide Nanomaterials to Form Molybdenum Oxysulfide. ACS APPLIED MATERIALS & INTERFACES 2022; 14:23850-23858. [PMID: 35545868 DOI: 10.1021/acsami.2c02432] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Molybdenum disulfide nanomaterials nowadays are very popular in electrocatalysis field due to their outstanding catalytic performance toward many electrochemical reactions. However, the electrochemical oxidation reaction of molybdenum disulfide nanomaterials in the range of positive potential has not been studied thoroughly. Herein, we have investigated electro-oxidation of molybdenum disulfide nanomaterials and put forward a new reaction mechanism: molybdenum disulfide nanomaterials are electro-oxidized with water to form molybdenum oxysulfide (MoOS2) and hydrogen ions, leading to the release of hydrogen on the counter electrode. Various characterization methods such as contact angle measurement, scanning electron microscope (SEM), transmission electron microscope (TEM) with energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray absorption near edge structure (XANES) spectroscopy, time-of-flight secondary ion mass spectrometry (ToF-SIMS), and gas chromatography (GC) were applied to attest the doping of oxygen and the generation of hydrogen. Based on this reaction, we constructed a novel ultrasensitive electrochemical sensor for detecting trace water with the minimum detectable content of 0.0010% (v/v) in various organic solvents and ionic liquids, which is comparable to the Karl Fischer titration, but with much simpler reagent.
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Affiliation(s)
- Di Liu
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Yixuan Bian
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Zhiwei Zhu
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Yuanhua Shao
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Meixian Li
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, People's Republic of China
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7
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Shao Y, He P, Yu Z, Liang X, Shao Y. Modulation of ionic current behaviors based on a dual-channel micro/nano-pipette with ternary-form-charged model. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Karimzadeh M, Seifollahi Z, Khatibi M, Ashrafizadeh SN. Impacts of the shape of soft nanochannels on their ion selectivity and current rectification. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139376] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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9
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Ionic conduction through single-pore and multipore polymer membranes in aprotic organic electrolytes. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119505] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Liu L, Aoki KJ, Chen J. Microhole‐voltammograms Controlled by Solution Reservoir at Cationic and Anionic Ion Exchange Membranes. ELECTROANAL 2021. [DOI: 10.1002/elan.202100111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ling Liu
- Department of Applied Physics University of Fukui 3-9-1 Bunkyo Fukui 910-0017 Japan
| | | | - Jingyuan Chen
- Department of Applied Physics University of Fukui 3-9-1 Bunkyo Fukui 910-0017 Japan
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11
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Sato K, Sato F, Kumano M, Kamijo T, Sato T, Zhou Y, Korchev Y, Fukuma T, Fujimura T, Takahashi Y. Electrochemical Quantitative Evaluation of the Surface Charge of a Poly(1‐Vinylimidazole) Multilayer Film and Application to Nanopore pH Sensor. ELECTROANAL 2021. [DOI: 10.1002/elan.202100041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Katsuhiko Sato
- Faculty of Pharmaceutical Science Tohoku Medical and Pharmaceutical University 4-4-1 Komatsushima, Aoba Sendai Miyagi 981-8558 Japan
- Department of Creative Engineering National Institute of Technology Tsuruoka College 104 Sawada, Inooka Tsuruoka Yamagata 997-8511 Japan
| | - Fumiya Sato
- Graduate School of Pharmaceutical Sciences Tohoku University 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Masayuki Kumano
- Graduate School of Pharmaceutical Sciences Tohoku University 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Toshio Kamijo
- Department of Creative Engineering National Institute of Technology Tsuruoka College 104 Sawada, Inooka Tsuruoka Yamagata 997-8511 Japan
| | - Takaya Sato
- Department of Creative Engineering National Institute of Technology Tsuruoka College 104 Sawada, Inooka Tsuruoka Yamagata 997-8511 Japan
| | - Yuanshu Zhou
- Nano Life Science Institute (WPI-NanoLSI) Kanazawa University, Kakuma-machi Kanazawa 920-1192 Japan
| | - Yuri Korchev
- Nano Life Science Institute (WPI-NanoLSI) Kanazawa University, Kakuma-machi Kanazawa 920-1192 Japan
- Imperial College London Department of Medicine W12 0NN London United Kingdom
| | - Takeshi Fukuma
- Nano Life Science Institute (WPI-NanoLSI) Kanazawa University, Kakuma-machi Kanazawa 920-1192 Japan
| | - Tsutomu Fujimura
- Faculty of Pharmaceutical Science Tohoku Medical and Pharmaceutical University 4-4-1 Komatsushima, Aoba Sendai Miyagi 981-8558 Japan
| | - Yasufumi Takahashi
- Nano Life Science Institute (WPI-NanoLSI) Kanazawa University, Kakuma-machi Kanazawa 920-1192 Japan
- Precursory Research for Embryonic Science and Technology (PRESTO) Japan Science and Technology Agency (JST) Saitama 332-0012 Japan
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12
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Abstract
Micro-hole voltammetry exhibiting rectified current-voltage curves was performed in hydrochloric acid by varying the lengths and the diameters of the micro-holes on one end of which a Nafion film was mounted. Some voltammetric properties were compared with those in NaCl solution. The voltammograms were composed of two line-segments, the slope of one segment being larger than the other. They were controlled by electric migration partly because of the linearity of the voltammograms and partly the independence of the scan rates. Since the low conductance which appeared in the current from the hole to the Nafion film was proportional to the cross section area of the hole and the inverse of the length of the hole, it should be controlled by the geometry of the hole. The conductance of the hydrogen ion in the Nafion film was observed to be smaller than that in the bulk, because the transport rate of hydrogen ion by the Grotthuss mechanism was hindered by the destruction of hydrogen bonds in the film. In contrast, the conductance for the current from the Nafion to the hole, enhancing by up to 30 times in magnitude from the opposite current, was controlled by the cell geometry rather than the hole geometry except for very small holes. A reason for the enhancement is a supply of hydrogen ions from the Nafion to increase the concentration in the hole. The concentration of the hydrogen ion was five times smaller than that of sodium ion because of the blocking of transport of the hydrogen ion in the Nafion film. However, the rectification ratio of H+ was twice as large as that of Na+.
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13
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Ionic current conduction at low voltage of track-etched double conical nanopores modified by surfactant CTAB. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02310-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Aoki KJ, Liu L, Marken F, Chen J. Rectification effects of Nafion-backed micropore-voltammograms by difference in migrational modes. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136839] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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15
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Covering the conical nanochannels with dense polyelectrolyte layers significantly improves the ionic current rectification. Anal Chim Acta 2020; 1122:48-60. [PMID: 32503743 DOI: 10.1016/j.aca.2020.05.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/16/2020] [Accepted: 05/03/2020] [Indexed: 12/26/2022]
Abstract
Because of their asymmetry, conical nanochannels/nanopores exhibit various attractive electrokinetic features, including ion selectivity, ionic concentration polarization, and ionic current rectification. The polyelectrolyte layer (PEL)-covered (soft) conical nanochannels have recently attracted significant attention because of their unique rectification characteristics. In the modeling of soft nanochannels, it is usually assumed that the properties of the PEL and the electrolyte are the same, an assumption that is not true, especially for dense PELs. In the present work, the influence of the PEL-electrolyte property difference on the ionic current rectification in conical soft nanochannels is studied. To this end, adopting a finite-element approach, the Poisson-Nernst-Planck and Navier-Stokes equations are numerically solved for a steady-state by considering different values of permittivity, diffusivity, and dynamic viscosity for the PEL and the electrolyte. The model is validated by comparing the results with the available theoretical and experimental data. The results show that the PEL-electrolyte property difference leads to a significant improvement of the rectification behavior, especially at low and moderate salt concentrations. This not only highlights the importance of considering different properties for the PEL and the electrolyte but also implies that the rectification behavior of soft nanochannels/nanopores may be improved considerably by utilizing denser PELs.
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16
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Liu X, Liu C, Yang J, Zhang R, Zeng Q, Wang L. Detection and FEM studies of dichromate (Cr2O72−) by allyltriethoxysilane modified nanochannel. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113818] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Chen W, Ding S, Wu J, Shi G, Zhu A. In situ detection of hydroxyl radicals in mitochondrial oxidative stress with a nanopipette electrode. Chem Commun (Camb) 2020; 56:13225-13228. [DOI: 10.1039/d0cc05889k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A nanopipette sensor was designed for the in situ detection of ˙OH around mitochondria with high selectivity and sensitivity.
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Affiliation(s)
- Wenting Chen
- School of Chemistry and Molecular Engineering
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Shushu Ding
- School of Chemistry and Molecular Engineering
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Jiaren Wu
- School of Chemistry and Molecular Engineering
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Guoyue Shi
- School of Chemistry and Molecular Engineering
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Anwei Zhu
- School of Chemistry and Molecular Engineering
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration
- East China Normal University
- Shanghai 200241
- People's Republic of China
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18
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Yang D, Liu G, Li H, Liu A, Guo J, Shan Y, Wang Z, He J. The fabrication of a gold nanoelectrode–nanopore nanopipette for dopamine enrichment and multimode detection. Analyst 2020; 145:1047-1055. [DOI: 10.1039/c9an01990a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
It is important to further improve the electrophysiology and electrochemistry techniques of neurotransmitter detection.
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Affiliation(s)
- Dan Yang
- Advanced Institute of Material Science
- Changchun University of Technology
- Changchun
- China
| | - Guohui Liu
- Advanced Institute of Material Science
- Changchun University of Technology
- Changchun
- China
| | - Hongna Li
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun
- China
| | - Aoxue Liu
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun
- China
| | - Jing Guo
- Physics
- Florida International University
- Miami
- USA
| | - Yuping Shan
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun
- China
| | - Zhe Wang
- Advanced Institute of Material Science
- Changchun University of Technology
- Changchun
- China
| | - Jin He
- Physics
- Florida International University
- Miami
- USA
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19
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LIU AX, YANG D, LI HN, LIU GH, FU Q, SHAN YP, YANG GC, HE J. Modulating Nanoparticle Translocation by Surface Chemistry of Gold Nanopores. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/s1872-2040(19)61174-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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Wang W, Zhao F, Li M, Zhang C, Shao Y, Tian Y. A SERS Optophysiological Probe for the Real‐Time Mapping and Simultaneous Determination of the Carbonate Concentration and pH Value in a Live Mouse Brain. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814286] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Weikang Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesEast China Normal University Dongchuan Road 500 Shanghai 200241 China
| | - Fan Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesEast China Normal University Dongchuan Road 500 Shanghai 200241 China
| | - Mingzhi Li
- Beijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking University Beijing 100871 China
| | - Chuanping Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesEast China Normal University Dongchuan Road 500 Shanghai 200241 China
| | - Yuanhua Shao
- Beijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking University Beijing 100871 China
| | - Yang Tian
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesEast China Normal University Dongchuan Road 500 Shanghai 200241 China
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22
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Wang W, Zhao F, Li M, Zhang C, Shao Y, Tian Y. A SERS Optophysiological Probe for the Real-Time Mapping and Simultaneous Determination of the Carbonate Concentration and pH Value in a Live Mouse Brain. Angew Chem Int Ed Engl 2019; 58:5256-5260. [PMID: 30811077 DOI: 10.1002/anie.201814286] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 02/01/2019] [Indexed: 01/02/2023]
Abstract
To have a profound understanding of the physiological and pathological processes in a brain, both chemical and electrical signals need to be recorded, but this is still very challenging. Herein, micrometer- to nanometer-sized SERS optophysiological probes were created to determine both the CO3 2- concentration and the pH in live brains and neurons because both species play important roles in regulating the acid-base balance in the brain. A ratiometric SERS microarray of eight microprobes with tip sizes of 5 μm was established and used for the first time for real-time mapping and simultaneous quantification of CO3 2- and pH in a live brain. We found that both the CO3 2- concentration and the pH value dramatically decreased under ischemic conditions. The present SERS technique can be combined with electrophysiology without cross-talk to record both electrical and chemical signals in brains. To deepen our understanding of the mechanism of ischemia on the single-cell level, a SERS nanoprobe with a tip size of 200 nm was developed for use in a single neuron.
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Affiliation(s)
- Weikang Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
| | - Fan Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
| | - Mingzhi Li
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Chuanping Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
| | - Yuanhua Shao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Yang Tian
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
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23
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Hsu JP, Chu YY, Lin CY, Tseng S. Ion transport in a pH-regulated conical nanopore filled with a power-law fluid. J Colloid Interface Sci 2019; 537:358-365. [DOI: 10.1016/j.jcis.2018.11.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/05/2018] [Accepted: 11/07/2018] [Indexed: 11/28/2022]
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24
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Liu X, Zeng Q, Liu C, Yang J, Wang L. Experimental and finite element method studies for femtomolar cobalt ion detection using a DHI modified nanochannel. Analyst 2019; 144:6118-6127. [DOI: 10.1039/c9an01344j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, a sensing nanochannel based on a N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole (DHI) modified nanopipette was prepared and characterized for the ultrasensitive detection of cobalt ions (Co2+) in aqueous solutions.
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Affiliation(s)
- Xuye Liu
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Qiang Zeng
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Cheng Liu
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Jie Yang
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Lishi Wang
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
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25
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Zhang S, Yin X, Li M, Zhang X, Zhang X, Qin X, Zhu Z, Yang S, Shao Y. Ionic Current Behaviors of Dual Nano- and Micropipettes. Anal Chem 2018; 90:8592-8599. [PMID: 29939012 DOI: 10.1021/acs.analchem.8b01765] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ionic current rectification (ICR) phenomena within dual glass pipettes are investigated for the first time. We demonstrate that the ionic flow presents different behaviors in dual nano- and micropipettes when the two channels are filled with the same electrolyte KCl and hung in air. Bare dual nanopipettes cannot rectify the ionic current because of their geometric symmetry, but the ICR can be directly observed based on bare dual micropipettes. The phenomena based on dual micropipettes could be explained by the simulation of the Poisson-Nernst-Plank equation. After modification with different approaches, the dual nanopipettes have asymmetric charge patterns and show various ICR behaviors. They have been successfully employed to fabricate various nanodevices, such as ionic diodes and bipolar junction transistors. Due to the simple and fast fabrication with high reproducibility, these dual pipettes can provide a novel platform for controlling ionic flow in nano- and microfluidics, fabrication of novel nanodevices, and detection of biomolecules.
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Affiliation(s)
- Shudong Zhang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Xiaohong Yin
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Mingzhi Li
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Xianhao Zhang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Xin Zhang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Xiaoli Qin
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Zhiwei Zhu
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Shuang Yang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Yuanhua Shao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
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26
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Zhang S, Li M, Su B, Shao Y. Fabrication and Use of Nanopipettes in Chemical Analysis. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2018; 11:265-286. [PMID: 29894227 DOI: 10.1146/annurev-anchem-061417-125840] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This review summarizes progress in the fabrication, modification, characterization, and applications of nanopipettes since 2010. A brief history of nanopipettes is introduced, and the details of fabrication, modification, and characterization of nanopipettes are provided. Applications of nanopipettes in chemical analysis are the focus in several cases, including recent progress in imaging; in the study of single molecules, single nanoparticles, and single cells; in fundamental investigations of charge transfer (ion and electron) reactions at liquid/liquid interfaces; and as hyphenated techniques combined with other methods to study the mechanisms of complicated electrochemical reactions and to conduct bioanalysis.
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Affiliation(s)
- Shudong Zhang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
| | - Mingzhi Li
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
| | - Bin Su
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China;
| | - Yuanhua Shao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
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27
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Double layer effects in voltammetric measurements with scanning electrochemical microscopy (SECM). J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.10.044] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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28
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He X, Zhang K, Liu Y, Wu F, Yu P, Mao L. Chaotropic Monovalent Anion‐Induced Rectification Inversion at Nanopipettes Modified by Polyimidazolium Brushes. Angew Chem Int Ed Engl 2018; 57:4590-4593. [DOI: 10.1002/anie.201800335] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/09/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Xiulan He
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Kailin Zhang
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yang Liu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
| | - Fei Wu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
| | - Ping Yu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Lanqun Mao
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
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29
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He X, Zhang K, Liu Y, Wu F, Yu P, Mao L. Chaotropic Monovalent Anion‐Induced Rectification Inversion at Nanopipettes Modified by Polyimidazolium Brushes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800335] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiulan He
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Kailin Zhang
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yang Liu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
| | - Fei Wu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
| | - Ping Yu
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Lanqun Mao
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry the Chinese Academy of Sciences (CAS) Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
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30
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Martinez J, Ashby D, Zhu C, Dunn B, Baker LA, Siwy ZS. Probing ion current in solid-electrolytes at the meso- and nanoscale. Faraday Discuss 2018; 210:55-67. [DOI: 10.1039/c8fd00071a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The ionic conductivity of silica ionogel based solid electrolyte on meso and nanoscales is measured.
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Affiliation(s)
- Joseph Martinez
- Department of Physics and Astronomy
- University of California
- Irvine
- USA
| | - David Ashby
- Department of Materials Science and Engineering
- University of California
- Los Angeles
- USA
| | - Cheng Zhu
- Department of Chemistry
- Indiana University
- Bloomington
- USA
| | - Bruce Dunn
- Department of Materials Science and Engineering
- University of California
- Los Angeles
- USA
| | - Lane A. Baker
- Department of Chemistry
- Indiana University
- Bloomington
- USA
| | - Zuzanna S. Siwy
- Department of Physics and Astronomy
- University of California
- Irvine
- USA
- Department of Chemistry
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31
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Li C, Zhao Y, He L, Mo R, Gao H, Zhou C, Hong P, Sun S, Zhang G. Mussel-inspired fabrication of porous anodic alumina nanochannels and a graphene oxide interfacial ionic rectification device. Chem Commun (Camb) 2018. [DOI: 10.1039/c8cc00209f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A mussel-inspired new interfacial ionic rectification device is fabricated using porous anodic alumina nanochannels and graphene oxide via dopamine polymerization.
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Affiliation(s)
- Chengyong Li
- School of Chemistry and Environment
- Guangdong Ocean University
- Zhanjiang 524088
- P. R. China
| | - Yu Zhao
- Department of Biomedical Engineering
- University of Kentucky
- Lexington
- USA
| | - Lei He
- College of Food Science and Technology
- Guangdong Ocean University
- Zhanjiang 524088
- P. R. China
| | - Rijian Mo
- College of Food Science and Technology
- Guangdong Ocean University
- Zhanjiang 524088
- P. R. China
| | - Hongli Gao
- Food and Bioengineering College
- Henan University of Science and Technology
- Luoyang
- P. R. China
| | - Chunxia Zhou
- College of Food Science and Technology
- Guangdong Ocean University
- Zhanjiang 524088
- P. R. China
| | - Pengzhi Hong
- College of Food Science and Technology
- Guangdong Ocean University
- Zhanjiang 524088
- P. R. China
| | - Shengli Sun
- School of Chemistry and Environment
- Guangdong Ocean University
- Zhanjiang 524088
- P. R. China
| | - Guigen Zhang
- Department of Biomedical Engineering
- University of Kentucky
- Lexington
- USA
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32
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Plett T, Thai ML, Cai J, Vlassiouk I, Penner RM, Siwy ZS. Ion transport in gel and gel-liquid systems for LiClO 4-doped PMMA at the meso- and nanoscales. NANOSCALE 2017; 9:16232-16243. [PMID: 29043361 DOI: 10.1039/c7nr06719d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Solid and gel electrolytes offer significant advantages for cycle stability and longevity in energy storage technologies. These advantages come with trade-offs such as reduced conductivity and ion mobility, which can impact power density in storage devices even at the nanoscale. Here we propose experiments aimed at exploring the ion transport properties of a hybrid electrolyte system of liquid and gel electrolytes with meso and nanoscale components. We focus on single pore systems featuring LiClO4-propylene carbonate and LiClO4-PMMA gel, which are model electrolytes for energy storage devices. We identified conditions at which the systems considered featured rectifying current-voltage curves, indicating a preferential direction of ion transport. The presented ion current rectification suggests different mechanisms arising from the unique hybrid system: (i) PMMA structure imposing selectivity in fully immersed systems and (ii) ionic selectivity linked to ion sourcing from media of different ionic mobility. These mechanisms were observed to interplay with ion transport properties linked to nanopore structure i.e. cylindrical and conical.
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Affiliation(s)
- Timothy Plett
- Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
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33
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Tetraalkylammonium Cations Conduction through a Single Nanofluidic Diode: Experimental and Theoretical Studies. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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34
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Biomimetic Mineralization of Gold Nanoclusters as Multifunctional Thin Films for Glass Nanopore Modification, Characterization, and Sensing. Anal Chem 2017; 89:7886-7892. [DOI: 10.1021/acs.analchem.7b00802] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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35
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Page A, Perry D, Unwin PR. Multifunctional scanning ion conductance microscopy. Proc Math Phys Eng Sci 2017; 473:20160889. [PMID: 28484332 PMCID: PMC5415692 DOI: 10.1098/rspa.2016.0889] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 03/13/2017] [Indexed: 12/21/2022] Open
Abstract
Scanning ion conductance microscopy (SICM) is a nanopipette-based technique that has traditionally been used to image topography or to deliver species to an interface, particularly in a biological setting. This article highlights the recent blossoming of SICM into a technique with a much greater diversity of applications and capability that can be used either standalone, with advanced control (potential-time) functions, or in tandem with other methods. SICM can be used to elucidate functional information about interfaces, such as surface charge density or electrochemical activity (ion fluxes). Using a multi-barrel probe format, SICM-related techniques can be employed to deposit nanoscale three-dimensional structures and further functionality is realized when SICM is combined with scanning electrochemical microscopy (SECM), with simultaneous measurements from a single probe opening up considerable prospects for multifunctional imaging. SICM studies are greatly enhanced by finite-element method modelling for quantitative treatment of issues such as resolution, surface charge and (tip) geometry effects. SICM is particularly applicable to the study of living systems, notably single cells, although applications extend to materials characterization and to new methods of printing and nanofabrication. A more thorough understanding of the electrochemical principles and properties of SICM provides a foundation for significant applications of SICM in electrochemistry and interfacial science.
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Affiliation(s)
- Ashley Page
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
- MOAC Doctoral Training Centre, University of Warwick, Coventry CV4 7AL, UK
| | - David Perry
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
- MOAC Doctoral Training Centre, University of Warwick, Coventry CV4 7AL, UK
| | - Patrick R. Unwin
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
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36
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Hsu JP, Wu HH, Lin CY, Tseng S. Ion Current Rectification Behavior of Bioinspired Nanopores Having a pH-Tunable Zwitterionic Surface. Anal Chem 2017; 89:3952-3958. [DOI: 10.1021/acs.analchem.6b04325] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jyh-Ping Hsu
- Department
of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10617
- Department
of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 10607
| | - Hou-Hsueh Wu
- Department
of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10617
| | - Chih-Yuan Lin
- Department
of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10617
| | - Shiojenn Tseng
- Department
of Mathematics, Tamkang University, New Taipei City, Taiwan 25137
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37
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Plett T, Shi W, Zeng Y, Mann W, Vlassiouk I, Baker LA, Siwy ZS. Rectification of nanopores in aprotic solvents--transport properties of nanopores with surface dipoles. NANOSCALE 2015; 7:19080-19091. [PMID: 26523891 DOI: 10.1039/c5nr06340j] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Nanopores have become a model system to understand transport properties at the nanoscale. We report experiments and modeling of ionic current in aprotic solvents with different dipole moments through conically shaped nanopores in a polycarbonate film and through glass nanopipettes. We focus on solutions of the salt LiClO4, which is of great importance in modeling lithium based batteries. Results presented suggest ion current rectification observed results from two effects: (i) adsorption of Li(+) ions to the pore walls, and (ii) a finite dipole moment rendered by adsorbed solvent molecules. Properties of surfaces in various solvents were probed by means of scanning ion conductance microscopy, which confirmed existence of an effectively positive surface potential in aprotic solvents with high dipole moments.
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Affiliation(s)
- Timothy Plett
- Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA
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