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Ribeiro JA, Silva AF, Girault HH, Pereira CM. Electroanalytical applications of ITIES - A review. Talanta 2024; 280:126729. [PMID: 39180876 DOI: 10.1016/j.talanta.2024.126729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 08/14/2024] [Accepted: 08/16/2024] [Indexed: 08/27/2024]
Abstract
Over the last decades, the interface between two immiscible electrolyte solutions (ITIES) attracted considerable attention of the scientific community due to their vast applications, such as extraction, catalysis, partition studies and sensing. The aim of this Review is to highlight the potential of electrochemistry at the ITIES for analytical purposes, focusing on ITIES-based sensors for detection and quantification of chemically and biologically relevant (bio)molecules. We start by addressing the evolution of ITIES in terms of number of publications over the years along with an overview of their main applications (Chapter 1). Then, we provide a general historical perspective about pioneer voltammetric studies at water/oil systems (Chapter 2). After that, we discuss the most impacting improvements on ITIES sensing systems from both perspectives, set-up design (interface stabilization and miniaturization, selection of the organic solvent, etc.) and optimization of experimental conditions to improve selectivity and sensitivity (Chapter 3). In Chapter 4, we discuss the analytical applications of ITIES for electrochemical sensing of several types of analytes, including drugs, pesticides, proteins, among others. Finally, we highlight the present achievements of ITIES as analytical tool and provide future challenges and perspectives for this technology (Chapter 5).
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Affiliation(s)
- José A Ribeiro
- CIQUP/Institute of Molecular Sciences (IMS), Department of Chemistry and Biochemistry, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, Porto, 4169-007, Portugal.
| | - A Fernando Silva
- CIQUP/Institute of Molecular Sciences (IMS), Department of Chemistry and Biochemistry, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, Porto, 4169-007, Portugal
| | - H H Girault
- Institut des Sciences et Ingénierie Chimiques (ISIC), École Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015, Lausanne, Switzerland
| | - Carlos M Pereira
- CIQUP/Institute of Molecular Sciences (IMS), Department of Chemistry and Biochemistry, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, Porto, 4169-007, Portugal.
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2
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Uematsu K, Tanaka E, Tanaka T, Katano H. Effect of the alkyl chain length of α,ω-dichloroalkane on the Gibbs energy of transfer for functional groups. ANAL SCI 2024:10.1007/s44211-024-00656-x. [PMID: 39225771 DOI: 10.1007/s44211-024-00656-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Accepted: 08/19/2024] [Indexed: 09/04/2024]
Abstract
Ion-transfer reactions of alkyl and perfluoroalkyl carboxylate ions (CH3(CH2)n-2COO- with n = 8-12 and CF3(CF2)n-2COO- with n = 3-9) were investigated at the polarized Cl-(CH2)m-Cl with m = 2, 4, 6, and 8 (O) | water (W) interface to evaluate the effects of n and m on the solvation energy of the ions, as well as on their methylene and terminal groups. These ions exhibited reversible or quasi-reversible voltammetric waves due to their transfer across the O | W interfaces, enabling the determination of formal potentials and formal Gibbs transfer energies from O to W, Δ G tr,o → w 0 ' The Δ G tr,o → w 0 ' values for CH3(CH2)n-2COO- and CF3(CF2)n-2COO- increased linearly with n, allowing the estimation of Δ G tr,o → w 0 ' for methylene and difluoromethylene groups, Δ G tr,o → w 0 ' (CH2) and Δ G tr,o → w 0 ' (CF2), and for their terminal groups, Δ G tr,o → w 0 ' (COO- + CH3) and Δ G tr,o → w 0 ' (COO- + CF3). Whereas the Δ G tr,o → w 0 ' (CH2) and Δ G tr,o → w 0 ' (CF2) hardly changed with the variation in m, the Δ G tr,o → w 0 ' (COO- + CH3) and Δ G tr,o → w 0 ' (COO- + CF3) decreased noticeably. These results suggest that the solvation energy for ions in Cl-(CH2)m-Cl increases with m, regardless of hydrophilic or lipophilic nature of the ions. Based on these findings, the advantage of using Cl-(CH2)m-Cl with a large m as a non-aqueous solvent for ion-transfer voltammetry was discussed.
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Affiliation(s)
- Kohei Uematsu
- Department of Bioscience and Biotechnology, Fukui Prefectural University, Eiheiji, Fukui, 910-1195, Japan.
| | - Erina Tanaka
- Department of Bioscience and Biotechnology, Fukui Prefectural University, Eiheiji, Fukui, 910-1195, Japan
| | - Takanari Tanaka
- Department of Bioscience and Biotechnology, Fukui Prefectural University, Eiheiji, Fukui, 910-1195, Japan
| | - Hajime Katano
- Department of Bioscience and Biotechnology, Fukui Prefectural University, Eiheiji, Fukui, 910-1195, Japan
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Islam GJ, Arrigan DWM. Voltammetric Selectivity in Detection of Ionized Perfluoroalkyl Substances at Micro-Interfaces between Immiscible Electrolyte Solutions. ACS Sens 2022; 7:2960-2967. [PMID: 36112026 DOI: 10.1021/acssensors.2c01100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Widespread contamination by per- and polyfluoroalkyl substances (PFAS) and concern about their health impacts require the availability of rapid sensing approaches. In this research, four PFAS, perfluorooctanoic acid (PFOA), perfluorobutanesulfonic acid (PFBS), perfluorohexanesulfonic acid (PFHxS), and perfluorooctanesulfonic acid (PFOS), were studied at micropipette-based interfaces between two immiscible electrolyte solutions (μITIES) to assess the potentiality for their detection by ion transfer voltammetry. All four PFAS substances were detected by ion transfer voltammetry at the μITIES, with half-wave transfer potentials (E1/2 vs Ag/AgCl) for PFOS, PFHxS, PFBS, and PFOA of 0.34, 0.32, 0.25, and 0.23 V, respectively. The selectivity of the μITIES for detection of PFAS mixtures was investigated. Among the six combinations of the four compounds, most combinations were detectable, except PFOA + PFBS and PFHxS + PFOS, because of unresolved ion transfer voltammograms. These findings provide a basis for the design of new PFAS sensing strategies based on ion transfer voltammetry.
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Affiliation(s)
- Gazi Jahirul Islam
- School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia.,Department of Chemistry, University of Barishal, Barisal 8254, Bangladesh
| | - Damien W M Arrigan
- School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
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Salman M, Lee SH, Jeshycka S, Lee JS, Lee HW, Lee HJ. Voltammetric Study of Lomefloxacin Transfer at the Interface between Two Immiscible Electrolyte Solutions: Ionic Partition, Photodegradation, and Sensing Applications. ChemElectroChem 2022. [DOI: 10.1002/celc.202200614] [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)
| | - Sang Hyuk Lee
- Kyungpook National University Chemistry KOREA, REPUBLIC OF
| | | | - Ji Soo Lee
- Kyungpook National University Chemistry KOREA, REPUBLIC OF
| | - Hye Won Lee
- Kyungpook National University Chemistry KOREA, REPUBLIC OF
| | - Hye Jin Lee
- Kyungpook National University Chemistry 1370 Snakyuk-dongdaehak, Bukgu 702-701 Daegu KOREA, REPUBLIC OF
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5
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Aslan E, Yanalak G, Patir IH. In Situ
Generated Amorphous Molybdenum Sulfide on Reduced Graphene Oxide Nanocomposite Catalyst for Hydrogen Evolution in a Biphasic Liquid System. ChemCatChem 2021. [DOI: 10.1002/cctc.202100871] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Emre Aslan
- Department of Biochemistry Selcuk University 42250 Konya Turkey
| | - Gizem Yanalak
- Department of Biochemistry Selcuk University 42250 Konya Turkey
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Lamichhane HB, Henares TG, Hackett MJ, Arrigan DWM. Structural Changes in Insulin at a Soft Electrochemical Interface. Anal Chem 2021; 93:9094-9102. [PMID: 34152129 DOI: 10.1021/acs.analchem.1c00657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Understanding the interaction of proteins at interfaces, which occurs at or within cell membranes and lipoprotein vesicles, is central to our understanding of protein function. Therefore, new experimental approaches to understand how protein structure is influenced by protein-interface interactions are important. Herein we build on our previous work exploring electrochemistry at the interface between two immiscible electrolyte solutions (ITIES) to investigate changes in protein secondary structure that are modulated by protein-interface interactions. The ITIES provides an experimental framework to drive protein adsorption at an interface, allowing subsequent spectroscopic analysis (e.g., Fourier transform infrared spectroscopy) to monitor changes in protein structure. Here, we reveal that the interaction between insulin and the interface destabilizes native insulin secondary structure, promoting formation of α helix secondary structures. These structural alterations result from protein-interface rather than protein-protein interactions at the interface. Although this is an emerging approach, our results provide a foundation highlighting the value of the ITIES as a tool to study protein structure and interactions at interfaces. Such knowledge may be useful to elucidate protein function within biological systems or to aid sensor development.
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Electrochemical Behavior and Detection of Diclofenac at a Microporous Si3N4 Membrane Modified Water–1,6-dichlorohexane Interface System. CHEMOSENSORS 2020. [DOI: 10.3390/chemosensors8010011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The electrochemical behavior when the liquid–liquid interface was modified by commercially available, microporous silicon nitride membrane, was achieved using cyclic voltammetry with tetramethyl ammonium. The transfer characteristics of the ionizable drug diclofenac ( DCF − ), as an anti-inflammatory, anti-rheumatic, antipyretic, and analgesic treatment in common use in biomedical applications, were also investigated across microporous silicon nitride-modified liquid interface. Thus, some thermodynamic variables for DCF − , such as the standard Gibbs energy of transfer, the standard transfer potential and lipophilicity were estimated. Furthermore, the influence of possible interfering substances (ascorbic acid, sugar, amino acid, urea, and metal ions) on the detection of DCF − was investigated. An electrochemical DCF sensor is investigated using differential pulse voltammetry (DPV) as the quantification technique, a linear range of 8–56 µM and a limit of detection of 1.5 µM was possible due to the miniaturized interfaces formed within silicon nitride.
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Booth SG, Felisilda BMB, Alvarez de Eulate E, Gustafsson OJR, Arooj M, Mancera RL, Dryfe RAW, Hackett MJ, Arrigan DWM. Secondary Structural Changes in Proteins as a Result of Electroadsorption at Aqueous-Organogel Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5821-5829. [PMID: 30955327 DOI: 10.1021/acs.langmuir.8b04227] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The electroadsorption of proteins at aqueous-organic interfaces offers the possibility to examine protein structural rearrangements upon interaction with lipophilic phases, without modifying the bulk protein or relying on a solid support. The aqueous-organic interface has already provided a simple means of electrochemical protein detection, often involving adsorption and ion complexation; however, little is yet known about the protein structure at these electrified interfaces. This work focuses on the interaction between proteins and an electrified aqueous-organic interface via controlled protein electroadsorption. Four proteins known to be electroactive at such interfaces were studied: lysozyme, myoglobin, cytochrome c, and hemoglobin. Following controlled protein electroadsorption onto the interface, ex situ structural characterization of the proteins by FTIR spectroscopy was undertaken, focusing on secondary structural traits within the amide I band. The structural variations observed included unfolding to form aggregated antiparallel β-sheets, where the rearrangement was specifically dependent on the interaction with the organic phase. This was supported by MALDI ToF MS measurements, which showed the formation of protein-anion complexes for three of these proteins, and molecular dynamic simulations, which modeled the structure of lysozyme at an aqueous-organic interface. On the basis of these findings, the modulation of protein secondary structure by interfacial electrochemistry opens up unique prospects to selectively modify proteins.
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Affiliation(s)
- Samuel G Booth
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL U.K
| | | | | | | | - Mahreen Arooj
- Department of Chemistry, College of Sciences , University of Sharjah , Sharjah 27272 , United Arab Emirates
| | | | - Robert A W Dryfe
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL U.K
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9
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Jeshycka S, Han HY, Lee HJ. Voltammetric Understanding of Ionizable Doxorubicin Transfer Reactions across Liquid/liquid Interfaces and Sensor Development. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.096] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Alvarez de Eulate E, O'Sullivan S, Arrigan DWM. Electrochemically Induced Formation of Cytochrome c
Oligomers at Soft Interfaces. ChemElectroChem 2017. [DOI: 10.1002/celc.201600851] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Eva Alvarez de Eulate
- Nanochemistry Research Institute & Department of Chemistry; Curtin University; GPO Box U1987 Perth Western Australia, Australia 6845
| | - Shane O'Sullivan
- Nanochemistry Research Institute & Department of Chemistry; Curtin University; GPO Box U1987 Perth Western Australia, Australia 6845
| | - Damien W. M. Arrigan
- Nanochemistry Research Institute & Department of Chemistry; Curtin University; GPO Box U1987 Perth Western Australia, Australia 6845
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11
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Akter R, Arrigan DWM. Detection of Prostate Specific Membrane Antigen at Picomolar Levels Using Biocatalysis Coupled to Assisted Ion Transfer Voltammetry at a Liquid-Organogel Microinterface Array. Anal Chem 2016; 88:11302-11305. [DOI: 10.1021/acs.analchem.6b03518] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Rashida Akter
- Nanochemistry Research Institute & Department of Chemistry, Curtin University, G.P.O Box U1987, Perth, Western Australia 6845, Australia
| | - Damien W. M. Arrigan
- Nanochemistry Research Institute & Department of Chemistry, Curtin University, G.P.O Box U1987, Perth, Western Australia 6845, Australia
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12
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Cranfield CG, Berry T, Holt SA, Hossain KR, Le Brun AP, Carne S, Al Khamici H, Coster H, Valenzuela SM, Cornell B. Evidence of the Key Role of H 3O + in Phospholipid Membrane Morphology. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10725-10734. [PMID: 27668940 DOI: 10.1021/acs.langmuir.6b01988] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study explains the importance of the phosphate moiety and H3O+ in controlling the ionic flux through phospholipid membranes. We show that despite an increase in the H3O+ concentration when the pH is decreased, the level of ionic conduction through phospholipid bilayers is reduced. By modifying the lipid structure, we show the dominant determinant of membrane conduction is the hydrogen bonding between the phosphate oxygens on adjacent phospholipids. The modulation of conduction with pH is proposed to arise from the varying H3O+ concentrations altering the molecular area per lipid and modifying the geometry of conductive defects already present in the membrane. Given the geometrical constraints that control the lipid phase structure of membranes, these area changes predict that organisms evolving in environments with different pHs will select for different phospholipid chain lengths, as is found for organisms near highly acidic volcanic vents (short chains) or in highly alkaline salt lakes (long chains). The stabilizing effect of the hydration shells around phosphate groups also accounts for the prevalence of phospholipids across biology. Measurement of ion permeation through lipid bilayers was made tractable using sparsely tethered bilayer lipid membranes with swept frequency electrical impedance spectroscopy and ramped dc amperometry. Additional evidence of the effect of a change in pH on lipid packing density is obtained from neutron reflectometry data of tethered membranes containing perdeuterated lipids.
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Affiliation(s)
- Charles G Cranfield
- School of Life Sciences, University of Technology Sydney , Ultimo, NSW 2007, Australia
| | - Thomas Berry
- School of Life Sciences, University of Technology Sydney , Ultimo, NSW 2007, Australia
| | - Stephen A Holt
- Australian Nuclear Science and Technology Organisation , Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Khondker R Hossain
- School of Life Sciences, University of Technology Sydney , Ultimo, NSW 2007, Australia
- Australian Nuclear Science and Technology Organisation , Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Anton P Le Brun
- Australian Nuclear Science and Technology Organisation , Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Sonia Carne
- SDx Tethered Membranes Pty. Ltd. , Unit 6, 30-32 Barcoo Street, Roseville, NSW 2069, Australia
| | - Heba Al Khamici
- School of Life Sciences, University of Technology Sydney , Ultimo, NSW 2007, Australia
| | - Hans Coster
- School of Chemical and Biomolecular Engineering, University of Sydney , Sydney, NSW 2006, Australia
| | - Stella M Valenzuela
- School of Life Sciences, University of Technology Sydney , Ultimo, NSW 2007, Australia
| | - Bruce Cornell
- SDx Tethered Membranes Pty. Ltd. , Unit 6, 30-32 Barcoo Street, Roseville, NSW 2069, Australia
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Abstract
Sample preparation is a vital and inseparable part of an analytical procedure. This issue has motivated the analytical research community around the world to develop new, fast and cost-effective extraction methods which can eliminate interfering substances, provide high preconcentration factors and increase the determination sensitivity. Electrical field induced extraction technique is a topic that has received major attention in recent years. This fact can be attributed to the considerable advantages provided by imposition of an electrical driving force especially control of different properties of an extraction system such as selectivity, cleanup, rate and efficiency. In this review, focus is centered on the electrical field induced liquid phase extraction techniques and their potential for bioanalysis.
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Arrigan DWM, Alvarez de Eulate E, Liu Y. Electroanalytical Opportunities Derived from Ion Transfer at Interfaces between Immiscible Electrolyte Solutions. Aust J Chem 2016. [DOI: 10.1071/ch15796] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This review presents an introduction to electrochemistry at interfaces between immiscible electrolyte solutions and surveys recent studies of this form of electrochemistry in electroanalytical strategies. Simple ion and facilitated ion transfers across interfaces varying from millimetre scale to nanometre scales are considered. Target detection strategies for a range of ions, inorganic, organic, and biological, including macromolecules, are discussed.
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15
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Goh E, Lee HJ. Applications of Electrochemistry at Liquid/Liquid Interfaces for Ionizable Drug Molecule Sensing. ACTA ACUST UNITED AC 2016. [DOI: 10.5189/revpolarography.62.77] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Eunseo Goh
- Department of Chemistry and Green-NanoMaterials Research Center, Kyungpook National University
| | - Hye Jin Lee
- Department of Chemistry and Green-NanoMaterials Research Center, Kyungpook National University
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Ventrelli L, Marsilio Strambini L, Barillaro G. Microneedles for Transdermal Biosensing: Current Picture and Future Direction. Adv Healthc Mater 2015; 4:2606-40. [PMID: 26439100 DOI: 10.1002/adhm.201500450] [Citation(s) in RCA: 128] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Indexed: 01/01/2023]
Abstract
A novel trend is rapidly emerging in the use of microneedles, which are a miniaturized replica of hypodermic needles with length-scales of hundreds of micrometers, aimed at the transdermal biosensing of analytes of clinical interest, e.g., glucose, biomarkers, and others. Transdermal biosensing via microneedles offers remarkable opportunities for moving biosensing technologies and biochips from research laboratories to real-field applications, and envisages easy-to-use point-of-care microdevices with pain-free, minimally invasive, and minimal-training features that are very attractive for both developed and emerging countries. In addition to this, microneedles for transdermal biosensing offer a unique possibility for the development of biochips provided with end-effectors for their interaction with the biological system under investigation. Direct and efficient collection of the biological sample to be analyzed will then become feasible in situ at the same length-scale of the other biochip components by minimally trained personnel and in a minimally invasive fashion. This would eliminate the need for blood extraction using hypodermic needles and reduce, in turn, related problems, such as patient infections, sample contaminations, analysis artifacts, etc. The aim here is to provide a thorough and critical analysis of state-of-the-art developments in this novel research trend, and to bridge the gap between microneedles and biosensors.
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Affiliation(s)
- Letizia Ventrelli
- Dipartimento di Ingegneria dell'Informazione; Università di Pisa; Via G. Caruso 16 56122 Pisa Italy
| | | | - Giuseppe Barillaro
- Dipartimento di Ingegneria dell'Informazione; Università di Pisa; Via G. Caruso 16 56122 Pisa Italy
- Istituto di Fisiologia Clinica; Consiglio Nazionale delle Ricerche; via G. Moruzzi 1 56124 Pisa Italy
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Colombo ML, McNeil S, Iwai N, Chang A, Shen M. Electrochemical Detection of Dopamine via Assisted Ion Transfer at Nanopipet Electrode Using Cyclic Voltammetry. JOURNAL OF THE ELECTROCHEMICAL SOCIETY 2015; 163:H3072-H3076. [PMID: 29606735 PMCID: PMC5873601 DOI: 10.1149/2.0091604jes] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We present here the detection of dopamine (DA) at nanopipet electrodes with radii of hundreds of nanometers ranging from 160 nm to 480 nm. Dibenzo-18-crown-6 (DB18C6) was employed as an ionophore to facilitate DA transfer, resulting in a half-wave transfer potential, E1/2, DA, of -0.322 (±0.020) V vs. E1/2, TBA. Well-defined steady-state sigmoidal cyclic voltammograms were observed for the transfer of DA. High resolution scanning electron microscopy was used to measure the size and taper angle of the nanopipet electrodes. The detection is linear with concentration of DA ranging from 0.25 mM to 2 mM; calculated diffusion coefficient at nanopipet electrodes with above mentioned sizes is 4.87 (±0.28) × 10-10 m2/s. The effect of the common interferent ascorbic acid on DA detection with nanopipet electrodes was evaluated, where DA detection still shows linear behavior with well-defined sigmoidal CVs with E1/2, DA being -0.328 (±0.029) V vs. E1/2, TBA. The diffusion coefficient for DA transfer in MgCl2 with the presence of 2 mM AA was measured to be 1.93 (±0.59) × 10-10 m2/s on nanoelectrodes with radii from 161 nm to 263 nm, but the physiological concentration of 0.1 mM AA had no effect on DA's diffusion coefficient.
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Affiliation(s)
- Michelle L. Colombo
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Swami McNeil
- University of Illinois College of Nursing, Champaign, Illinois 61821, USA
| | - Nicholas Iwai
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Albert Chang
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Mei Shen
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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Poltorak L, Morakchi K, Herzog G, Walcarius A. Electrochemical characterization of liquid-liquid micro-interfaces modified with mesoporous silica. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.01.129] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Uematsu K, Maruyama C, Hamano Y, Katano H. Ion-transfer voltammetry of streptothricin antibiotics with differently sized lysine oligomers at a nitrobenzene | water interface. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2015.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Mansfeldová V, Janda P, Tarábková H, Kaleta J. Interface of Two Immiscible Electrolytes as a Potentiometric Sensor for Flow Analysis. ANAL LETT 2015. [DOI: 10.1080/00032719.2015.1010651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Seidi S, Yamini Y, Rezazadeh M. Electrochemically assisted solid based extraction techniques: A review. Talanta 2015; 132:339-53. [DOI: 10.1016/j.talanta.2014.08.059] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 08/20/2014] [Accepted: 08/21/2014] [Indexed: 11/25/2022]
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22
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Herzog G. Recent developments in electrochemistry at the interface between two immiscible electrolyte solutions for ion sensing. Analyst 2015; 140:3888-96. [DOI: 10.1039/c5an00601e] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The most recent developments on electrochemical sensing of ions at the liquid–liquid interface are reviewed here.
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Affiliation(s)
- Grégoire Herzog
- Laboratoire de Chimie Physique et Microbiologie pour l'Environnement (LCPME)
- UMR 7564
- CNRS – Université de Lorraine
- Villers-lès-Nancy
- France
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Poltorak L, Dossot M, Herzog G, Walcarius A. Interfacial processes studied by coupling electrochemistry at the polarised liquid–liquid interface with in situ confocal Raman spectroscopy. Phys Chem Chem Phys 2014; 16:26955-62. [DOI: 10.1039/c4cp03254c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Poltorak L, Herzog G, Walcarius A. Electrochemically assisted generation of silica deposits using a surfactant template at liquid/liquid microinterfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11453-63. [PMID: 25229369 DOI: 10.1021/la501938g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The electrochemically assisted generation of mesoporous silica deposits at arrays of microscopic liquid/liquid interfaces was investigated. Ion transfer voltammetry was used in order to initiate the formation of silica material by electrochemical transfer of template species (cetyltrimethylammonium, CTA(+)), initially present in the organic phase, to the aqueous phase containing the hydrolyzed silica precursors (tetraethoxysilane, TEOS). The deposition mechanism was investigated using cyclic voltammetry, based on the analysis of diffusion layer profiles of CTA(+) species from the organic side of the interface. The morphology of the deposits varied from hemispherical to almost flat with the potential scan rate, the spacing factor of the microinterfaces array supporting the liquid/liquid interfaces, or the initial CTA(+) and TEOS concentrations, as evidenced by scanning electron microscopy and profilometry analyses. The amount of deposited material can be related to the amount of CTA(+) species passing across the liquid/liquid interfaces. Confocal Raman spectroscopy was used to confirm the presence of surfactant-templated silica deposits and to analyze the effectiveness of calcination in removing the organic molecules filling the interior of the pores. After template removal, the mesoporous network became accessible to external reagents, as checked by interfacial alkylammonium cation transfer, suggesting a possible analytical interest of such modified micro-liquid/liquid interfaces.
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Affiliation(s)
- Lukasz Poltorak
- Laboratoire de Chimie Physique et Microbiologie pour l'Environnement (LCPME), UMR 7564, CNRS - Université de Lorraine, 405 rue de Vandoeuvre, 54600 Villers-les-Nancy, France
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25
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Arrigan D, Herzog G, Scanlon M, Strutwolf J. Bioanalytical Applications of Electrochemistry at Liquid-Liquid Microinterfaces. ELECTROANALYTICAL CHEMISTRY: A SERIES OF ADVANCES 2013. [DOI: 10.1201/b15576-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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26
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Sairi M, Strutwolf J, Mitchell RA, Silvester DS, Arrigan DW. Chronoamperometric response at nanoscale liquid–liquid interface arrays. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.11.062] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Alvarez de Eulate E, O'Sullivan S, Fletcher S, Newsholme P, Arrigan DWM. Ion-Transfer Electrochemistry of Rat Amylin at the Water-Organogel Microinterface Array and Its Selective Detection in a Protein Mixture. Chem Asian J 2013; 8:2096-101. [DOI: 10.1002/asia.201300215] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Indexed: 11/11/2022]
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Ge P, Olaya AJ, Scanlon MD, Hatay Patir I, Vrubel H, Girault HH. Photoinduced Biphasic Hydrogen Evolution: Decamethylosmocene as a Light-Driven Electron Donor. Chemphyschem 2013; 14:2308-16. [DOI: 10.1002/cphc.201300122] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Indexed: 12/19/2022]
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29
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Stripping voltammetry at micro-interface arrays: A review. Anal Chim Acta 2013; 769:10-21. [DOI: 10.1016/j.aca.2012.12.031] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 12/04/2012] [Accepted: 12/18/2012] [Indexed: 11/18/2022]
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Ribeiro JA, Silva F, Pereira CM. Electrochemical Study of the Anticancer Drug Daunorubicin at a Water/Oil Interface: Drug Lipophilicity and Quantification. Anal Chem 2013; 85:1582-90. [DOI: 10.1021/ac3028245] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- José A. Ribeiro
- Faculdade de Ciências da Universidade
do Porto, Departamento de Química e Bioquímica, Centro de Investigação em Química, Linha 4, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
| | - F. Silva
- Faculdade de Ciências da Universidade
do Porto, Departamento de Química e Bioquímica, Centro de Investigação em Química, Linha 4, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
| | - Carlos M. Pereira
- Faculdade de Ciências da Universidade
do Porto, Departamento de Química e Bioquímica, Centro de Investigação em Química, Linha 4, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
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Scanlon MD, Bian X, Vrubel H, Amstutz V, Schenk K, Hu X, Liu B, Girault HH. Low-cost industrially available molybdenum boride and carbide as “platinum-like” catalysts for the hydrogen evolution reaction in biphasic liquid systems. Phys Chem Chem Phys 2013; 15:2847-57. [DOI: 10.1039/c2cp44522k] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Alvarez de Eulate E, Serls L, Arrigan DWM. Detection of haemoglobin using an adsorption approach at a liquid–liquid microinterface array. Anal Bioanal Chem 2012; 405:3801-6. [DOI: 10.1007/s00216-012-6622-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 11/23/2012] [Accepted: 11/29/2012] [Indexed: 10/27/2022]
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Alvarez de Eulate E, Silvester DS, Arrigan DWM. Behavior of Lysozyme at the Electrified Water/Room Temperature Ionic Liquid Interface. Chem Asian J 2012; 7:2559-61. [DOI: 10.1002/asia.201200390] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Indexed: 11/05/2022]
Affiliation(s)
- Eva Alvarez de Eulate
- Department of Chemistry, Nanochemistry Research Institute, Curtin University, GPO Box U1987 Perth WA 6845 (Australia), Fax: (+61) 8 92669735
| | - Debbie S. Silvester
- Department of Chemistry, Nanochemistry Research Institute, Curtin University, GPO Box U1987 Perth WA 6845 (Australia), Fax: (+61) 8 92669735
| | - Damien W. M. Arrigan
- Department of Chemistry, Nanochemistry Research Institute, Curtin University, GPO Box U1987 Perth WA 6845 (Australia), Fax: (+61) 8 92669735
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36
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Herzog G, Flynn S, Johnson C, Arrigan DW. Electroanalytical Behavior of Poly-l-Lysine Dendrigrafts at the Interface between Two Immiscible Electrolyte Solutions. Anal Chem 2012; 84:5693-9. [DOI: 10.1021/ac300856w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Grégoire Herzog
- Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland
| | - Shane Flynn
- Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland
| | - Colm Johnson
- Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland
| | - Damien W.M. Arrigan
- Nanochemistry Research Institute,
Department of Chemistry, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
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37
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Alvarez de Eulate E, Arrigan DWM. Adsorptive Stripping Voltammetry of Hen-Egg-White-Lysozyme via Adsorption–Desorption at an Array of Liquid–Liquid Microinterfaces. Anal Chem 2012; 84:2505-11. [DOI: 10.1021/ac203249p] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Eva Alvarez de Eulate
- Nanochemistry Research
Institute, Department of Chemistry, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
| | - Damien W. M. Arrigan
- Nanochemistry Research
Institute, Department of Chemistry, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
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38
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Hartvig RA, van de Weert M, Ostergaard J, Jorgensen L, Jensen H. Formation of dielectric layers and charge regulation in protein adsorption at biomimetic interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1804-1815. [PMID: 22185404 DOI: 10.1021/la204309a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Protein charge is an important parameter in the understanding of protein interactions and function. Proteins are subject to dynamic charge regulation, that is, the influence of the local environment (such as charged interfaces and biopolymers) on protein charge. Charge regulation is governed by differences in the dielectric and electrostatic environment between adsorbed protein and the free protein in bulk solution. In this work protein charge regulation is addressed experimentally by employing electrochemistry at interfaces between two immiscible electrolyte solutions (ITIES) as well as theoretically by developing a new protein adsorption model at ITIES. Electrochemistry at ITIES is shown to be particularly well suited to study protein charge regulation as the adsorbed protein experiences a different dielectric environment compared to the bulk phase and the external control of the water/oil potential difference allows systematic studies on how potential induced ion gradients affect protein charge. The theoretical model incorporates all the features of the experimental system and specifically takes into account protein charge regulation at ITIES as well as the impact of the formation of dielectric layers on the experimentally observed impedance. The model parameters include the protein charge-pH profile, bulk pH, and the overall potential difference. It is shown that the formation of a dielectric layer and the associated charge regulation are the main factors dictating the observed experimental behavior. Finally, the theoretical model is used to interpret literature results, and the consistency between the model and the relatively large data set suggests that the model may be used more generally for understanding and predicting protein adsorption.
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Affiliation(s)
- Rune A Hartvig
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
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Mirshafian R, Norouzi P, Ganjali MR. Voltammetric Ion-Selective Nanocomposite Carbon Paste Electrode for Determination of Erbium at the Interface Between two Immiscible Electrolyte Solutions. ELECTROANAL 2012. [DOI: 10.1002/elan.201100580] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Abstract
The main aspects related to the charge transfer reactions occurring at the interface between two immiscible electrolyte solutions (ITIES) are described. The particular topics to be discussed involve simple ion transfer. Focus is given on theoretical approaches, numerical simulations, and experimental methodologies. Concerning the theoretical procedures, different computational simulations related to simple ion transfer are reviewed. The main conclusions drawn from the most accepted models are described and analyzed in regard to their relevance for explaining different aspects of ion transfer. We describe numerical simulations implementing different approaches for solving the differential equations associated with the mass transport and charge transfer. These numerical simulations are correlated with selected experimental results; their usefulness in designing new experiments is summarized. Finally, many practical applications can be envisaged regarding the determination of physicochemical properties, electroanalysis, drug lipophilicity, and phase-transfer catalysis.
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41
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Hossain MM, Kim CS, Cha HJ, Lee HJ. Amperometric Detection of Parathion and Methyl Parathion with a Microhole-ITIES. ELECTROANAL 2011. [DOI: 10.1002/elan.201100190] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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42
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Hossain MM, Faisal SN, Kim CS, Cha HJ, Nam SC, Lee HJ. Amperometric proton selective strip-sensors with a microelliptic liquid/gel interface for organophosphate neurotoxins. Electrochem commun 2011. [DOI: 10.1016/j.elecom.2011.03.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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43
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Scanlon MD, Arrigan DWM. Enhanced Electroanalytical Sensitivity via Interface Miniaturisation: Ion Transfer Voltammetry at an Array of Nanometre Liquid-Liquid Interfaces. ELECTROANAL 2011. [DOI: 10.1002/elan.201000667] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Vuorema A, Meadows H, Ibrahim NB, Del Campo J, Cortina-Puig M, Vagin MY, Karyakin AA, Sillanpää M, Marken F. Ion Transport Across Liquid|Liquid Interfacial Boundaries Monitored at Generator-Collector Electrodes. ELECTROANAL 2010. [DOI: 10.1002/elan.201000368] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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45
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Hartvig RA, Méndez MA, Weert MVD, Jorgensen L, Østergaard J, Girault HH, Jensen H. Interfacial Complexes between a Protein and Lipophilic Ions at an Oil−Water Interface. Anal Chem 2010; 82:7699-705. [DOI: 10.1021/ac101528r] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rune A. Hartvig
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Laboratoire d’Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - Manuel A. Méndez
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Laboratoire d’Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - Marco van de Weert
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Laboratoire d’Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - Lene Jorgensen
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Laboratoire d’Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - Jesper Østergaard
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Laboratoire d’Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - Hubert H. Girault
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Laboratoire d’Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - Henrik Jensen
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark, and Laboratoire d’Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
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46
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Ellis JS, Xu SQ, Wang X, Herzog G, Arrigan DW, Thompson M. Interaction of surface-attached haemoglobin with hydrophobic anions monitored by on-line acoustic wave detector. Bioelectrochemistry 2010; 79:6-10. [DOI: 10.1016/j.bioelechem.2009.09.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Revised: 09/21/2009] [Accepted: 09/27/2009] [Indexed: 10/20/2022]
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47
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Scanlon MD, Strutwolf J, Blake A, Iacopino D, Quinn AJ, Arrigan DWM. Ion-Transfer Electrochemistry at Arrays of Nanointerfaces between Immiscible Electrolyte Solutions Confined within Silicon Nitride Nanopore Membranes. Anal Chem 2010; 82:6115-23. [DOI: 10.1021/ac1008282] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Micheál D. Scanlon
- Tyndall National Institute, Lee Maltings, University College Cork, Cork, Ireland
| | - Jörg Strutwolf
- Tyndall National Institute, Lee Maltings, University College Cork, Cork, Ireland
| | - Alan Blake
- Tyndall National Institute, Lee Maltings, University College Cork, Cork, Ireland
| | - Daniela Iacopino
- Tyndall National Institute, Lee Maltings, University College Cork, Cork, Ireland
| | - Aidan J. Quinn
- Tyndall National Institute, Lee Maltings, University College Cork, Cork, Ireland
| | - Damien W. M. Arrigan
- Tyndall National Institute, Lee Maltings, University College Cork, Cork, Ireland
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48
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Strutwolf J, Scanlon MD, Arrigan DW. The performance of differential pulse stripping voltammetry at micro-liquid–liquid interface arrays. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2010.01.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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49
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Electric field-enhanced transport across phase boundaries and membranes and its potential use in sample pretreatment for bioanalysis. Electrophoresis 2010; 31:768-85. [DOI: 10.1002/elps.200900561] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Kivlehan F, Lefoix M, Moynihan HA, Thompson D, Ogurtsov VI, Herzog G, Arrigan DW. Interaction of acridine-calix[4]arene with DNA at the electrified liquid|liquid interface. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.01.042] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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