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Marcuccio F, Soulias D, Chau CCC, Radford SE, Hewitt E, Actis P, Edwards MA. Mechanistic Study of the Conductance and Enhanced Single-Molecule Detection in a Polymer-Electrolyte Nanopore. ACS NANOSCIENCE AU 2023; 3:172-181. [PMID: 37096230 PMCID: PMC10119975 DOI: 10.1021/acsnanoscienceau.2c00050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/13/2022] [Accepted: 12/14/2022] [Indexed: 04/26/2023]
Abstract
Solid-state nanopores have been widely employed in the detection of biomolecules, but low signal-to-noise ratios still represent a major obstacle in the discrimination of nucleic acid and protein sequences substantially smaller than the nanopore diameter. The addition of 50% poly(ethylene) glycol (PEG) to the external solution is a simple way to enhance the detection of such biomolecules. Here, we demonstrate with finite-element modeling and experiments that the addition of PEG to the external solution introduces a strong imbalance in the transport properties of cations and anions, drastically affecting the current response of the nanopore. We further show that the strong asymmetric current response is due to a polarity-dependent ion distribution and transport at the nanopipette tip region, leading to either ion depletion or enrichment for few tens of nanometers across its aperture. We provide evidence that a combination of the decreased/increased diffusion coefficients of cations/anions in the bath outside the nanopore and the interaction between a translocating molecule and the nanopore-bath interface is responsible for the increase in the translocation signals. We expect this new mechanism to contribute to further developments in nanopore sensing by suggesting that tuning the diffusion coefficients of ions could enhance the sensitivity of the system.
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Affiliation(s)
- Fabio Marcuccio
- School
of Electronic and Electrical Engineering, University of Leeds, LeedsLS2 9JT, U.K.
- Bragg
Centre for Materials Research, University
of Leeds, LeedsLS2 9JT, U.K.
| | - Dimitrios Soulias
- School
of Electronic and Electrical Engineering, University of Leeds, LeedsLS2 9JT, U.K.
- Bragg
Centre for Materials Research, University
of Leeds, LeedsLS2 9JT, U.K.
| | - Chalmers C. C. Chau
- School
of Electronic and Electrical Engineering, University of Leeds, LeedsLS2 9JT, U.K.
- Bragg
Centre for Materials Research, University
of Leeds, LeedsLS2 9JT, U.K.
- School
of Molecular and Cellular Biology and Astbury Centre for Structural
Molecular Biology, University of Leeds, LeedsLS2 9JT, U.K.
| | - Sheena E. Radford
- School
of Molecular and Cellular Biology and Astbury Centre for Structural
Molecular Biology, University of Leeds, LeedsLS2 9JT, U.K.
| | - Eric Hewitt
- School
of Molecular and Cellular Biology and Astbury Centre for Structural
Molecular Biology, University of Leeds, LeedsLS2 9JT, U.K.
| | - Paolo Actis
- School
of Electronic and Electrical Engineering, University of Leeds, LeedsLS2 9JT, U.K.
- Bragg
Centre for Materials Research, University
of Leeds, LeedsLS2 9JT, U.K.
| | - Martin Andrew Edwards
- Department
of Chemistry and Biochemistry, University
of Arkansas, Fayetteville, Arkansas72701, United States
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2
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Chau C, Marcuccio F, Soulias D, Edwards MA, Tuplin A, Radford SE, Hewitt E, Actis P. Probing RNA Conformations Using a Polymer-Electrolyte Solid-State Nanopore. ACS NANO 2022; 16:20075-20085. [PMID: 36279181 PMCID: PMC9798860 DOI: 10.1021/acsnano.2c08312] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Nanopore systems have emerged as a leading platform for the analysis of biomolecular complexes with single-molecule resolution. The conformation of biomolecules, such as RNA, is highly dependent on the electrolyte composition, but solid-state nanopore systems often require high salt concentration to operate, precluding analysis of macromolecular conformations under physiologically relevant conditions. Here, we report the implementation of a polymer-electrolyte solid-state nanopore system based on alkali metal halide salts dissolved in 50% w/v poly(ethylene) glycol (PEG) to augment the performance of our system. We show that polymer-electrolyte bath governs the translocation dynamics of the analyte which correlates with the physical properties of the salt used in the bath. This allowed us to identify CsBr as the optimal salt to complement PEG to generate the largest signal enhancement. Harnessing the effects of the polymer-electrolyte, we probed the conformations of the Chikungunya virus (CHIKV) RNA genome fragments under physiologically relevant conditions. Our system was able to fingerprint CHIKV RNA fragments ranging from ∼300 to ∼2000 nt length and subsequently distinguish conformations between the co-transcriptionally folded and the natively refolded ∼2000 nt CHIKV RNA. We envision that the polymer-electrolyte solid-state nanopore system will further enable structural and conformational analyses of individual biomolecules under physiologically relevant conditions.
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Affiliation(s)
- Chalmers Chau
- School
of Molecular and Cellular Biology and Astbury Centre for Structural
Molecular Biology, University of Leeds, Leeds LS2 9JT, U.K.
- School
of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, Leeds LS2 9JT, U.K.
- Bragg
Centre for Materials Research, University
of Leeds, Leeds LS2 9JT, U.K.
| | - Fabio Marcuccio
- School
of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, Leeds LS2 9JT, U.K.
- Bragg
Centre for Materials Research, University
of Leeds, Leeds LS2 9JT, U.K.
| | - Dimitrios Soulias
- School
of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, Leeds LS2 9JT, U.K.
- Bragg
Centre for Materials Research, University
of Leeds, Leeds LS2 9JT, U.K.
| | - Martin Andrew Edwards
- Department
of Chemistry & Biochemistry, University
of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Andrew Tuplin
- School
of Molecular and Cellular Biology and Astbury Centre for Structural
Molecular Biology, University of Leeds, Leeds LS2 9JT, U.K.
| | - Sheena E. Radford
- School
of Molecular and Cellular Biology and Astbury Centre for Structural
Molecular Biology, University of Leeds, Leeds LS2 9JT, U.K.
| | - Eric Hewitt
- School
of Molecular and Cellular Biology and Astbury Centre for Structural
Molecular Biology, University of Leeds, Leeds LS2 9JT, U.K.
| | - Paolo Actis
- School
of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, Leeds LS2 9JT, U.K.
- Bragg
Centre for Materials Research, University
of Leeds, Leeds LS2 9JT, U.K.
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3
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Li WC, Lin CH, Wang PH, Cheng TT, Wen TC. Triple capacitance via the dehydration of saturated water from carboxylated chitosan bearing zwitterion electrolytes. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2022.104285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Zhang Z, Han Y, Chen WR, Do C. Diffusion characteristics of water molecules in a lamellar structure formed by triblock copolymers. Phys Chem Chem Phys 2022; 24:8015-8021. [PMID: 35315475 DOI: 10.1039/d2cp00207h] [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
The distribution and diffusion of water molecules are playing important roles in determining self-assembly and transport properties of polymeric systems. Small-angle neutron scattering (SANS) experiments and molecular dynamics (MD) simulation have been applied to understand the distribution of water molecules and their dynamics in the lamellar membrane formed by Pluronic L62 block copolymers. Penetration of water molecules into the polyethylene oxide (PEO) layers of the membranes has been estimated using scattering length density (SLD) profiles obtained from SANS measurements, which agree well with the molecular distribution observed from MD simulations. The water diffusion coefficient at different regions of the lamellar membrane was further investigated using MD simulation. The diffusion characteristic shows a transition from normal to anomalous diffusion as the position of the water molecule changes from the bulk to PEO and to the polypropylene oxide (PPO) layer. We find that water molecules within the PEO or PPO layers follow subdiffusive dynamics, which can be interpreted by the model of fractional Brownian motion.
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Affiliation(s)
- Zhe Zhang
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA. .,Forschungszentrum Jülich, Jülich Center for Neutron Science, Outstation at the Spallation Neutron Source (SNS), Oak Ridge National Laboratory, Oak Ridge Tennessee, 37831, USA
| | - Youngkyu Han
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
| | - Wei-Ren Chen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
| | - Changwoo Do
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
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5
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Srivastava S, Fink Z, Burns EG, Russell TP, Hoagland DA. Shear‐sensitive
chain extension of dissolved poly(ethylene oxide) by aluminate ions. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Satyam Srivastava
- Polymer Science and Engineering Department University of Massachusetts Amherst Amherst Massachusetts USA
| | - Zachary Fink
- Polymer Science and Engineering Department University of Massachusetts Amherst Amherst Massachusetts USA
| | - Elizabeth G. Burns
- Innovation (R&D), Concrete Admixtures GCP Applied Technologies Cambridge Massachusetts USA
| | - Thomas P. Russell
- Polymer Science and Engineering Department University of Massachusetts Amherst Amherst Massachusetts USA
- Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley California USA
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing China
| | - David A. Hoagland
- Polymer Science and Engineering Department University of Massachusetts Amherst Amherst Massachusetts USA
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6
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Foran G, Mankovsky D, Verdier N, Lepage D, Prébé A, Aymé-Perrot D, Dollé M. The Impact of Absorbed Solvent on the Performance of Solid Polymer Electrolytes for Use in Solid-State Lithium Batteries. iScience 2020; 23:101597. [PMID: 33205013 PMCID: PMC7648137 DOI: 10.1016/j.isci.2020.101597] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The effects of solvent absorption on the electrochemical and mechanical properties of polymer electrolytes for use in solid-state batteries have been measured by researchers since the 1980s. These studies have shown that small amounts of absorbed solvent may increase ion mobility and decrease crystallinity in these materials. Even though many polymers and lithium salts are hygroscopic, the solvent content of these materials is rarely reported. As ppm-level solvent content may have important consequences for the lithium conductivity and crystallinity of these electrolytes, more widespread reporting is recommended. Here we illustrate that ppm-level solvent content can significantly increase ion mobility, and therefore the reported performance, in solid polymer electrolytes. Additionally, the impact of absorbed solvents on other battery components has not been widely investigated in all-solid-state battery systems. Therefore, comparisons will be made with systems that use liquid electrolytes to better understand the consequences of absorbed solvents on electrode performance.
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Affiliation(s)
- Gabrielle Foran
- Département de Chimie, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
| | - Denis Mankovsky
- Département de Chimie, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
| | - Nina Verdier
- Département de Chimie, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
| | - David Lepage
- Département de Chimie, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
| | - Arnaud Prébé
- Département de Chimie, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
| | | | - Mickaël Dollé
- Département de Chimie, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
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7
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Mankovsky D, Lepage D, Lachal M, Caradant L, Aymé-Perrot D, Dollé M. Water content in solid polymer electrolytes: the lost knowledge. Chem Commun (Camb) 2020; 56:10167-10170. [PMID: 32747887 DOI: 10.1039/d0cc03556d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We reproducibly quantify the water content in different SPE systems through various processing/drying conditions and tie the residual amounts of water to heightened ionic conductivities. Moreover, we emphasise on the need to control the sample preparation and isolation as hydration occurs instantly when the dried sample encounters air.
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Affiliation(s)
- Denis Mankovsky
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
| | - David Lepage
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
| | - Marie Lachal
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
| | - Léa Caradant
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
| | | | - Mickaël Dollé
- Département de Chimie, Université de Montréal, CP6128 Succursale Centre-Ville, Montréal, QC H3T 1J4, Canada.
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8
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Tung CH, Huang GR, Chang SY, Han Y, Chen WR, Do C. Revealing the Influence of Salts on the Hydration Structure of Ionic SDS Micelles by Contrast-Variation Small-Angle Neutron Scattering. J Phys Chem Lett 2020; 11:7334-7341. [PMID: 32813537 DOI: 10.1021/acs.jpclett.0c01533] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The influence of lithium chloride (LiCl) on the hydration structure of anionic micelles of sodium dodecyl sulfate (SDS) in water was studied using the contrast-variation small-angle neutron scattering (SANS) technique. In the past, extensive computational studies have shown that the distribution of invasive water plays a critical role in the self-organization of SDS molecules and the stability of the assemblies. However, in past scattering studies the degree of the hydration level was not examined explicitly. Here, a series of contrast-variation SANS data was analyzed to extract the intramicellar radial distributions of invasive water and SDS molecules from the evolving spectral lineshapes caused by the varying isotopic ratios of water. By addressing the intramicellar inhomogeneous distributions of water and SDS molecules, a detailed description of how the counterion association influences the micellization behavior of SDS molecules is provided. The extension of our method can be used to provide an in-depth insight into the micellization phenomenon, which is commonly found in many soft matter systems.
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Affiliation(s)
- Chi-Huan Tung
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
- Shull Wollan Center, The University of Tennessee and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Guan-Rong Huang
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Shou-Yi Chang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Youngkyu Han
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongjin 17074, Republic of Korea
| | - Wei-Ren Chen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Changwoo Do
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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9
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Singh S, Nanda R, Dorai K. Structural and dynamical aspects of PEG/LiClO 4 in solvent mixtures via NMR spectroscopy. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:412-422. [PMID: 30883938 DOI: 10.1002/mrc.4867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 01/08/2019] [Accepted: 03/10/2019] [Indexed: 06/09/2023]
Abstract
Motivated by the potential usefulness of polyethylene glycol (PEG)/Li+ salt mixtures in several industrial applications, we investigated the structure and dynamics of PEG/LiClO4 mixtures in D2 O and its mixtures with CD3 CN and DMSO-d6 , in a series of PEG-based polymers with a wide variation in their molecular weights. 1 H NMR chemical shifts, T1 /T2 relaxation rates, pulsed-field gradient NMR diffusion experiments, and 2D HOESY NMR studies have been performed to understand the structural and dynamical aspects of these mixtures. Increasing the temperature of the medium results in a significant perturbation in the H-bonded structure of PEG in its PEG/LiClO4 /D2 O mixtures as observed from the increase in chemical shifts. On the other hand, the addition of molecular cosolvents has a negligible effect. The hydrodynamic structure of PEG shows a pronounced variation at low temperature with increasing molecular weight, which, however, disappears at higher temperatures. Increasing the temperature leads to a decrease in the hydrodynamic structure of PEG, which can be explained on the basis of solvation-desolvation phenomena. The 2D HOESY NMR spectra reveal a new finding of Li+ -water binding in the PEG/LiClO4 /D2 O mixtures with the addition of molecular solvents, suggesting that the Li+ cation diffuses freely in the D2 O mixtures of polymers as compared with the polymer mixtures with DMSO or CD3 CN.
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Affiliation(s)
- Satnam Singh
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Mohali, India
| | - Raju Nanda
- Department of Chemistry, Michigan State University, East Lansing, MI
| | - Kavita Dorai
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Mohali, India
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10
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Kim M, Vala M, Ertsgaard CT, Oh SH, Lodge TP, Bates FS, Hackel BJ. Surface Plasmon Resonance Study of the Binding of PEO-PPO-PEO Triblock Copolymer and PEO Homopolymer to Supported Lipid Bilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6703-6712. [PMID: 29787676 PMCID: PMC6055929 DOI: 10.1021/acs.langmuir.8b00873] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Poloxamer 188 (P188), a poly(ethylene oxide)- b-poly(propylene oxide)- b-poly(ethylene oxide) triblock copolymer, protects cell membranes against various external stresses, whereas poly(ethylene oxide) (PEO; 8600 g/mol) homopolymer lacks protection efficacy. As part of a comprehensive effort to elucidate the protection mechanism, we used surface plasmon resonance (SPR) to obtain direct evidence of binding of the polymers onto supported lipid bilayers. Binding kinetics and coverage of P188 and PEO were examined and compared. Most notably, PEO exhibited membrane association comparable to that of P188, evidenced by comparable association rate constants and coverage. This result highlights the need for additional mechanistic understanding beyond simple membrane association to explain the differential efficacy of P188 in therapeutic applications.
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