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Wang X, Yang H, Yu Z, Zhang Z, Chen Y. Two-Dimensional Graphene-Based Potassium Channels Built at an Oil/Water Interface. Materials (Basel) 2023; 16:5393. [PMID: 37570097 PMCID: PMC10419551 DOI: 10.3390/ma16155393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 07/27/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023]
Abstract
Graphene-based laminar membranes exhibit remarkable ion sieving properties, but their monovalent ion selectivity is still low and much less than the natural ion channels. Inspired by the elementary structure/function relationships of biological ion channels embedded in biomembranes, a new strategy is proposed herein to mimic biological K+ channels by using the graphene laminar membrane (GLM) composed of two-dimensional (2D) angstrom(Å)-scale channels to support a simple model of semi-biomembrane, namely oil/water (O/W) interface. It is found that K+ is strongly preferred over Na+ and Li+ for transferring across the GLM-supported water/1,2-dichloroethane (W/DCE) interface within the same potential window (-0.1-0.6 V), although the monovalent ion selectivity of GLM under the aqueous solution is still low (K+/Na+~1.11 and K+/Li+~1.35). Moreover, the voltammetric responses corresponding to the ion transfer of NH4+ observed at the GLM-supported W/DCE interface also show that NH4+ can often pass through the biological K+ channels due to their comparable hydration-free energies and cation-π interactions. The underlying mechanism of as-observed K+ selective voltammetric responses is discussed and found to be consistent with the energy balance of cationic partial-dehydration (energetic costs) and cation-π interaction (energetic gains) as involved in biological K+ channels.
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Affiliation(s)
- Xiaoyuan Wang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | | | | | | | - Yong Chen
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
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Yamamoto D, Maeno J, Manabe Y, Okamoto Y, Nawa-Okita E, Shioi A. Mode Bifurcation on Contact Line Dynamics at Oil/Water Interface Depending on the Contact Line Length. Front Chem 2021; 9:708633. [PMID: 34381762 PMCID: PMC8350764 DOI: 10.3389/fchem.2021.708633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 07/13/2021] [Indexed: 11/13/2022] Open
Abstract
The motion of the contact line at the oil/water interface caused by chemical reactions is well known as a typical example of artificial active matter in the field of nonlinear science. When water (containing trimethylstearylammonium chloride) and nitrobenzene (containing iodide anion) phases are in contact, the regulated traveling-wave patterns appear along the inner wall of the glass container. In this study, we demonstrate a new dynamical mode of the contact line, an up-and-down motion, which becomes dominant with the decrease in the size of a glass tube, and the probability of occurrence is extremely high when the diameter of the glass tube is below 1 mm. A physicochemical model of the contact line motion that incorporates the spatiotemporal variation of the surfactant concentration on a glass surface is proposed, and its effect on the wettability of oil/water phases on the walls of the glass tubes is studied. The present model can reproduce the mode bifurcation of the dynamical motion depending on the inner diameter of the glass tubes.
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Affiliation(s)
- Daigo Yamamoto
- Department of Chemical Engineering and Materials Science, Doshisha University, Kyoto, Japan
| | - Jumpei Maeno
- Department of Chemical Engineering and Materials Science, Doshisha University, Kyoto, Japan
| | - Yuki Manabe
- Department of Chemical Engineering and Materials Science, Doshisha University, Kyoto, Japan
| | - Yasunao Okamoto
- Department of Chemical Engineering and Materials Science, Doshisha University, Kyoto, Japan
| | - Erika Nawa-Okita
- Department of Chemical Engineering, Osaka Prefecture University, Osaka, Japan
| | - Akihisa Shioi
- Department of Chemical Engineering and Materials Science, Doshisha University, Kyoto, Japan
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Jiang P, Zhang L, Guo H, Chen C, Wu C, Zhang S, Wang ZL. Signal Output of Triboelectric Nanogenerator at Oil-Water-Solid Multiphase Interfaces and its Application for Dual-Signal Chemical Sensing. Adv Mater 2019; 31:e1902793. [PMID: 31414526 DOI: 10.1002/adma.201902793] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/23/2019] [Indexed: 05/21/2023]
Abstract
A liquid-solid contact triboelectric nanogenerator (TENG) based on poly(tetrafluoroethylene) (PTFE) film, a copper electrode, and a glass substrate for harvesting energy in oil/water multiphases is reported. There are two distinctive signals being generated, one is from the contact electrification and electrostatic induction between the liquid (water/oil) and the PTFE film (VTENG and ITENG ); and the other is from the electrostatic induction in the copper electrode by the oil/water interfacial charges (ΔVinterface and Iinterface ), which is generated only when the liquid-solid contact TENG is inserted across the oil/water interface. The two signals show interesting opposite changing trends that the VTENG and ITENG decrease while the oil/water interfacial signals of ΔVinterface and Iinterface increase after coating a layer of polydopamine on the surfaces of PTFE and glass via self-polymerization. As an application of the observed phenomena, both the values of ITENG and Iinterface have a good linear relationship versus the natural logarithm of the concentration of the dopamine. Based on this, the first self-powered dual-signal detection of dopamine using TENG is demonstrated.
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Affiliation(s)
- Peng Jiang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, P. R. China
| | - Lei Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Hengyu Guo
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Chaoyu Chen
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Changsheng Wu
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Steven Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Zhong Lin Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
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Pirozzi I, Snider A, Kraus M, Schönbrunner ER, Tripathi A. Microfluidic Immiscible Phase Filtration System for the Isolation of Small Numbers of Cells from Whole Blood. Cytometry A 2019; 95:885-897. [PMID: 30852843 DOI: 10.1002/cyto.a.23736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 12/24/2018] [Accepted: 02/05/2019] [Indexed: 11/09/2022]
Abstract
Isolation of circulating tumor cells (CTCs) has generated clinical and academic interest due to the important role that CTCs play in cancer metastasis and diagnosis. Here, we present a PDMS and glass prototype of a microfluidic device for the immunomagnetic, immiscible phase filtration based capture, and isolation of MCF-7 breast cancer cells, from various sample matrices including PBS-based buffer, blood plasma, and unprocessed whole blood. Following optimization of surface energy of an oil-water interface, microfluidic geometry, and bead-binding kinematics, our microfluidic device achieved 95 ± 4% recovery of target cells from PBS-based buffer with 95% purity, 90 ± 3% recovery of target cells from blood plasma and recovery of ~70 ± 5% from unprocessed whole blood with purity >99% with 1 ml blood samples with 1,000 spiked target cells. From quantitative studies to assess the nonspecific carryover of contaminants from whole blood, we found that our system accomplishes a >175 fold depletion in platelets, >900 fold depletion in erythrocytes, and >1,700 fold depletion in leukocytes with respect to unprocessed whole blood, enabling us to avoid sample pre-processing. In addition, we found that ~95% of the isolated target cells were viable, making them suitable for subsequent molecular and cellular studies. We quantify and propose mechanisms for the carryover of platelet, erythrocyte, and leukocyte contamination in purified samples, rather than relying on sample pre-processing. These results validate the continued study of our platform for extraction of CTCs from patient samples and other rare cell isolation applications. © 2019 International Society for Advancement of Cytometry.
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Affiliation(s)
- Ileana Pirozzi
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island
| | - Adam Snider
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island
| | - Morey Kraus
- PerkinElmer, 940 Winter St, Waltham, Massachusetts
| | | | - Anubhav Tripathi
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island
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Zhang K, Zhao J, Xu H, Li Y, Ji J, Liu B. Multifunctional Paper Strip Based on Self-Assembled Interfacial Plasmonic Nanoparticle Arrays for Sensitive SERS Detection. ACS Appl Mater Interfaces 2015; 7:16767-74. [PMID: 26186409 DOI: 10.1021/acsami.5b04534] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A smart and multifunctional paper-based SERS sensing card is generated through patterning self-assembled interfacial arrays of gold nanoparticles (AuNPs) on the tip of an arrow-shaped paper strip. It is found that the closely packed monolayer of AuNPs is evenly distributed on the paper surface, resulting in a multitude of SERS hot spots over the detection zone. The paper card, with its inherent ability to separate and preconcentrate analytes by the capillary force and polarity difference between sample components, was exploited successfully as an integrated platform, allowing for sub-attomolar (50 × 10(-18) M) detection from microliter-volume (10 μL) samples. Furthermore, the simple preparation (lithography-free process), fast detection (<5 min), and low cost (<3 cents) demonstrate that the paper card is a practical and portable sensing interface for wide application in environmental and food analysis.
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Affiliation(s)
- Kun Zhang
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, China
| | - Jingjing Zhao
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, China
| | - Huiying Xu
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, China
| | - Yixin Li
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, China
| | - Ji Ji
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, China
| | - Baohong Liu
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, China
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Maeda Y, Wei Z, Matsui H. Biomimetic assembly of proteins into microcapsules on oil-in-water droplets with structural reinforcement via biomolecular-recognition-based cross-linking of surface peptides. Small 2012; 8:1341-4. [PMID: 22378709 PMCID: PMC3516996 DOI: 10.1002/smll.201102571] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Indexed: 05/31/2023]
Abstract
By mimicking the stabilization of bacterial membranes with S-layer proteins, a novel process to fabricate highly stable protein microcapsules is introduced. In this strategy, engineered collagen peptides with site-specific biotinylation are assembled into microcapsules on the oil-in-water droplets, and the resulting microcapsules are reinforced by biomolecular-recognition-based cross-linking with the protein. Furthermore the microcapsules are shown to be versatile scaffolds for developing functionalized hierarchical colloidosomes for important biotechnological applications.
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Affiliation(s)
- Yoshiaki Maeda
- Department of Chemistry and Biochemistry, City University of New York (CUNY), Hunter College 695 Park Ave New York, NY, 10065 (USA)
| | - Zengyan Wei
- Department of Chemistry and Biochemistry, City University of New York (CUNY), Hunter College 695 Park Ave New York, NY, 10065 (USA)
| | - Hiroshi Matsui
- Department of Chemistry and Biochemistry, City University of New York (CUNY), Hunter College 695 Park Ave New York, NY, 10065 (USA)
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