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Ion-transfer electrochemistry at arrays of nanoscale interfaces between two immiscible electrolyte solutions arranged in hexagonal format. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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2
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Burgoyne ED, Molina-Osorio AF, Moshrefi R, Shanahan R, McGlacken GP, Stockmann TJ, Scanlon MD. Detection of Pseudomonas aeruginosa quorum sensing molecules at an electrified liquid|liquid micro-interface through facilitated proton transfer. Analyst 2021; 145:7000-7008. [PMID: 32869782 DOI: 10.1039/d0an01245a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Miniaturization of electrochemical detection methods for point-of-care-devices is ideal for their integration and use within healthcare environments. Simultaneously, the prolific pathogenic bacteria Pseudomonas aeruginosa poses a serious health risk to patients with compromised immune systems. Recognizing these two factors, a proof-of-concept electrochemical method employing a micro-interface between water and oil (w/o) held at the tip of a pulled borosilicate glass capillary is presented. This method targets small molecules produced by P. aeruginosa colonies as signalling factors that control colony growth in a pseudo-multicellular process known as quorum sensing (QS). The QS molecules of interest are 4-hydroxy-2-heptylquinoline (HHQ) and 2-heptyl-3,4-dihydroxyquinoline (PQS, Pseudomonas quinolone signal). Hydrophobic HHQ and PQS molecules, dissolved in the oil phase, were observed electrochemically to facilitate proton transfer across the w/o interface. This interfacial complexation can be exploited as a facile electrochemical detection method for P. aeruginosa and is advantageous as it does not depend on the redox activity of HHQ/PQS. Interestingly, the limit-of-linearity is reached as [H+] ≈ [ligand]. Density functional theory calculations were performed to determine the proton affinities and gas-phase basicities of HHQ/PQS, as well as elucidate the likely site of stepwise protonation within each molecule.
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Affiliation(s)
- Edward D Burgoyne
- The Bernal Institute and Department of Chemical Sciences, School of Natural Sciences, University of Limerick (UL), Limerick V94 T9PX, Ireland.
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Fang Y, Deng H, Huang X, Wang L. Ion Selective Detection Based on the Nuances of the Kinetic Fingerprint for Ion Transfer at Soft Interfaces. Anal Chem 2021; 93:3353-3361. [PMID: 33550802 DOI: 10.1021/acs.analchem.0c02266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel approach has been developed for the selective determination of cations or anions based on the application of Fourier transformed staircase sinusoidal voltammetry (FT-SC-SV) in combination with the interface between two immiscible electrolyte solutions (ITIES) in the four-electrode configuration. The electrochemistry at the ITIES provides a very simple yet sensitive platform for the detection of a broad spectrum of redox inactive ions and even the neutral (bio)molecules that can be charged (e.g., protonated in appropriate pH). FT-SC-SV employs a complex potential excitation, i.e., a large-amplitude sine wave superimposed onto a dc bias potential that is stepped/scanned throughout the potential window. The response current is subsequently analyzed in the frequency domain by FT. Although the ions have close standard/formal transfer potential, discrimination and selective detection can be achieved by the higher harmonics. Feasibility and reliability of the proposed approach were verified with two pairs of ions that have very close transfer potentials across the ITIES and were chosen as the model systems. Besides, the additivity of the ionic current magnitude on concentration measured either in the mixture of ionic analytes or in individually prepared solutions containing the separate ionic analyte was tested. The experimental results prove that the principle of additivity holds. Compared with the traditional voltammetry, FT-SC-SV is simpler and more efficient in discrimination and quantification of apparently indistinguishable ion transfer from the viewpoint of thermodynamics. This demonstration may provide a new way for analytical detection of a broad range of redox inactive ions in terms of both fundamentals and applications.
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Affiliation(s)
- Yishan Fang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.,State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Haiqiang Deng
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
| | - Xinjian Huang
- Institute of Applied Electronics, Midea Corporate Research Center, Foshan 528311, China
| | - Lishi Wang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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Liu C, Ma Y, Nan J, Wang L. Ion Transfer-Resolved Fusion Impacts of Single Droplets Probed at the Liquid/Liquid Interface. Anal Chem 2020; 92:15394-15402. [DOI: 10.1021/acs.analchem.0c02991] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Cheng Liu
- School of Chemistry, South China Normal University, Guangzhou 510006, China
| | - Ya Ma
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Junmin Nan
- School of Chemistry, South China Normal University, Guangzhou 510006, China
| | - Lishi Wang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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5
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Ametryn detection by proton assisted transfer at a single micro-interface between two immiscible electrolyte solutions. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114745] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Suárez-Herrera MF, Scanlon MD. Quantitative Analysis of Redox-Inactive Ions by AC Voltammetry at a Polarized Interface between Two Immiscible Electrolyte Solutions. Anal Chem 2020; 92:10521-10530. [PMID: 32608226 DOI: 10.1021/acs.analchem.0c01340] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The interface between two immiscible electrolyte solutions (ITIES) is ideally suited to detect redox-inactive ions by their ion transfer. Such electroanalysis, based on the Nernst-Donnan equation, has been predominantly performed using amperometry, cyclic voltammetry, or differential pulse voltammetry. Here, we introduce a new electroanalytical method based on alternating-current (AC) voltammetry with inherent advantages over traditional approaches such as avoidance of positive feedback iR compensation, a major issue for liquid|liquid electrochemical cells containing resistive organic media and interfacial areas in the cm2 and mm2 range. A theoretical background outlining the generation of the analytical signal is provided and based on extracting the component that depends on the Warburg impedance from the total impedance. The quantitative detection of a series of model redox-inactive tetraalkylammonium cations is demonstrated, with evidence provided of the transient adsorption of these cations at the interface during the course of ion transfer. Since ion transfer is diffusion-limited, by changing the voltage excitation frequency during AC voltammetry, the intensity of the Faradaic response can be enhanced at low frequencies (1 Hz) or made to disappear completely at higher frequencies (99 Hz). The latter produces an AC voltammogram equivalent to a "blank" measurement in the absence of analyte and is ideal for background subtraction. Therefore, major opportunities exist for the sensitive detection of ionic analyte when a "blank" measurement in the absence of analyte is impossible. This approach is particularly useful to deconvolute signals related to reversible electrochemical reactions from those due to irreversible processes, which do not give AC signals.
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Affiliation(s)
- Marco F Suárez-Herrera
- Departamento De Química, Facultad De Ciencias, Universidad Nacional De Colombia, Cra 30 # 45-03, Edificio 451, Bogotá, Colombia
| | - Micheál D Scanlon
- The Bernal Institute and Department of Chemical Sciences, School of Natural Sciences, University of Limerick (UL), Limerick V94 T9PX, Ireland
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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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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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Scanlon MD, Smirnov E, Stockmann TJ, Peljo P. Gold Nanofilms at Liquid–Liquid Interfaces: An Emerging Platform for Redox Electrocatalysis, Nanoplasmonic Sensors, and Electrovariable Optics. Chem Rev 2018; 118:3722-3751. [DOI: 10.1021/acs.chemrev.7b00595] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Micheál D. Scanlon
- The Bernal Institute and Department of Chemical Sciences, School of Natural Sciences, University of Limerick (UL), Limerick V94 T9PX, Ireland
| | - Evgeny Smirnov
- Laboratoire d’Electrochimie Physique et Analytique (LEPA), École Polytechnique Fédérale de Lausanne (EPFL), Rue de l’Industrie 17, CH-1951 Sion, Switzerland
| | - T. Jane Stockmann
- Interfaces, Traitements, Organisation et Dynamique des Systèmes, CNRS-UMR 7086, Sorbonne Paris Cité, Paris Diderot University, 15 Rue J.A. Baïf, 75013 Paris, France
| | - Pekka Peljo
- Laboratoire d’Electrochimie Physique et Analytique (LEPA), École Polytechnique Fédérale de Lausanne (EPFL), Rue de l’Industrie 17, CH-1951 Sion, Switzerland
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Liu C, Peljo P, Huang X, Cheng W, Wang L, Deng H. Single Organic Droplet Collision Voltammogram via Electron Transfer Coupled Ion Transfer. Anal Chem 2017; 89:9284-9291. [DOI: 10.1021/acs.analchem.7b02072] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Cheng Liu
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Pekka Peljo
- Laboratoire
d’Electrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne (EPFL Valais Wallis), Rue de
I’Industrie, 17, 1951 Sion, Switzerland
| | - Xinjian Huang
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Wenxue Cheng
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Lishi Wang
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Haiqiang Deng
- Institute
of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
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11
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Laborda E, Molina A, Espín VF, Martínez‐Ortiz F, García de la Torre J, Compton RG. Single Fusion Events at Polarized Liquid–Liquid Interfaces. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201610185] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Eduardo Laborda
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - Angela Molina
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - Vanesa Fernández Espín
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - Francisco Martínez‐Ortiz
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - José García de la Torre
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - Richard G. Compton
- Department of Chemistry, Physical & Theoretical Chemistry Laboratory Oxford University South Parks Road Oxford OX1 3QZ UK
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12
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Laborda E, Molina A, Espín VF, Martínez‐Ortiz F, García de la Torre J, Compton RG. Single Fusion Events at Polarized Liquid–Liquid Interfaces. Angew Chem Int Ed Engl 2016; 56:782-785. [DOI: 10.1002/anie.201610185] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 11/15/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Eduardo Laborda
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - Angela Molina
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - Vanesa Fernández Espín
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - Francisco Martínez‐Ortiz
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - José García de la Torre
- Department of Physical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum” University of Murcia Murcia 30100 Spain
| | - Richard G. Compton
- Department of Chemistry, Physical & Theoretical Chemistry Laboratory Oxford University South Parks Road Oxford OX1 3QZ UK
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