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An P, Yang J, Wang T, Lu S, Wang D, Wang Z, Sun CL, Qin C, Li J. Layer-by-layer assembly of homopolypeptide polyelectrolytes on asymmetric nanochannels for the detection of nickel ions. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2654-2660. [PMID: 38623688 DOI: 10.1039/d4ay00422a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Nickel stands out as one of the prevalent heavy metal ionic pollutants found in water. It is urgent to devise a simple, efficient, budget-friendly, highly-selective and proficient method for detecting Ni(II). This work reports an approach to design a nanofluidic diode for the ultrasensitive and label-free detection of nickel ions based on layer-by-layer assembly of polyarginine (PA) and polyglutamic acid (γ-PGA) on the inner surface of asymmetric nanochannels. We can tune the adsorption/desorption characteristics of the asymmetric nanochannels for Ni2+ by adjusting the pH changes, i.e., the PA-γ-PGA modified nanochannels adsorb Ni2+ at pH 6 and desorb at pH 3 in aqueous solution. This pivotal adjustment facilitates the reusable and specific detection of nickel ions with a detection limit of 1 × 10-8 M. Moreover, the system demonstrates commendable stability and recyclability, enhancing its practical applicability. This innovative system holds promise for recognizing and detecting nickel ions in diverse environments such as water, blood, and cells. The robust performance and adaptability of our proposed system instill confidence in its potential for future applications.
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Affiliation(s)
- Pengrong An
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an City, Shaanxi Province, 710072, P. R. China.
| | - Jincan Yang
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an City, Shaanxi Province, 710072, P. R. China.
| | - Tianming Wang
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an City, Shaanxi Province, 710072, P. R. China.
| | - Saiwen Lu
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an City, Shaanxi Province, 710072, P. R. China.
| | - Dehao Wang
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an City, Shaanxi Province, 710072, P. R. China.
| | - Zhuoyue Wang
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an City, Shaanxi Province, 710072, P. R. China.
| | - Chun-Lin Sun
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, No. 222, Tianshui Road (South), Lanzhou City, Gansu Province, 730000, P. R. China.
| | - Chuanguang Qin
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an City, Shaanxi Province, 710072, P. R. China.
| | - Jun Li
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an City, Shaanxi Province, 710072, P. R. China.
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Farrell EB, McNeill F, Weiss A, Duleba D, Guiry PJ, Johnson RP. The Detection of Trace Metal Contaminants in Organic Products Using Ion Current Rectifying Quartz Nanopipettes. Anal Chem 2024; 96:6055-6064. [PMID: 38569051 PMCID: PMC11024892 DOI: 10.1021/acs.analchem.4c00634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/26/2024] [Accepted: 03/20/2024] [Indexed: 04/05/2024]
Abstract
While ion current rectification (ICR) in aprotic solvent has been fundamentally studied, its application in sensing devices lacks exploration. The development of sensors operable in these solvents is highly beneficial to the chemical industry, where polar aprotic solvents, such as acetonitrile, are widely used. Currently, this industry relies on the use of inductively coupled plasma mass spectrometry (ICP-MS) and optical emission spectroscopy (OES) for the detection of metal contamination in organic products. Herein, we present the detection of trace amounts of Pd2+ and Co2+ using ion current rectification, in cyclam-functionalized quartz nanopipettes, with tetraethylammonium tetrafluoroborate (TEATFB) in MeCN as supporting electrolyte. This methodology is employed to determine the concentration of Pd in organic products, before and after purification by Celite filtration and column chromatography, obtaining comparable results to ICP-MS within minutes and without complex sample preparation. Finite element simulations are used to support our experimental findings, which reveal that the formation of double-junction diodes in the nanopore enables trace detection of these metals, with a significant response from baseline even at picomolar concentrations.
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Affiliation(s)
- Emer B. Farrell
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Fionn McNeill
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Alexander Weiss
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dominik Duleba
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Patrick J. Guiry
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Robert P. Johnson
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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Suo Z, Liang R, Liu R, Wei M, He B, Jiang L, Sun X, Jin H. A convenient paper-based fluorescent aptasensor for high-throughput detection of Pb 2+ in multiple real samples (water-soil-food). Anal Chim Acta 2023; 1239:340714. [PMID: 36628769 DOI: 10.1016/j.aca.2022.340714] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/04/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022]
Abstract
Lead ion (Pb2+) is one of the most toxic and widely polluted heavy metal ions. Given the potential health risks and economic losses associated with Pb2+, the rapid detection of Pb2+ using fluorescent aptasensors is of significant importance in evaluating food safety. A rapid, facile and economic fluorescent aptasensor using convenient paper as the sensing substrate was designed to high-throughput detect Pb2+ in complex samples within about 45 min. The Pb2+ changed the conformation of FAM-modified Apt from a random coil to a stable G-quadruplex structure. And then Dabcyl-labeled cDNA was added to form double-stranded DNA with the Apt that did not form a G-quadruplex structure, resulting in a weak fluorescence due to the fluorescence resonance energy transfer (FRET). The fluorescent aptasensor showed a positive correlation with Pb2+ concentration, and a linear relationship was obtained in the range of 0.01-10 μM with LOD of 6.1 nM. In addition, this method has been successfully used for the determination of Pb2+ in water, soil and various foods containing complex substrates. Meanwhile, the high-throughput detection of Pb2+ has also reached an acceptable level. Therefore, this convenient strategy has potential application value for on-site rapid detection of Pb2+.
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Affiliation(s)
- Zhiguang Suo
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Henan University of Technology, Zhengzhou, 450001, China.
| | - Ruirui Liang
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Henan University of Technology, Zhengzhou, 450001, China
| | - Ruike Liu
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Henan University of Technology, Zhengzhou, 450001, China
| | - Min Wei
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Henan University of Technology, Zhengzhou, 450001, China
| | - Baoshan He
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Henan University of Technology, Zhengzhou, 450001, China
| | - Liying Jiang
- College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, China
| | - Xiaoxia Sun
- Henan Institute of Product Quality Supervision and Inspection, Zhengzhou, 450002, China
| | - Huali Jin
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Henan University of Technology, Zhengzhou, 450001, China
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Farrell EB, Duleba D, Johnson RP. Aprotic Solvent Accumulation Amplifies Ion Current Rectification in Conical Nanopores. J Phys Chem B 2022; 126:5689-5694. [PMID: 35867912 PMCID: PMC9358645 DOI: 10.1021/acs.jpcb.2c03172] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ion current rectification is highly reported in aqueous electrochemical systems and sensors but lacks exploration in organic systems due to the additional complexity introduced by non-aqueous solvents. Herein, a detailed study on ion current rectification with highly polar and mildly polar aprotic organic solvents as a function of tetraethylammonium tetrafluoroborate supporting electrolyte concentration is presented. To explain our experimental results, we introduce a previously unreported phenomenon: the formation of a double-junction diode within the nanopore that arises due to a complex interplay between ion and solvent enrichment effects. Finite element simulations are used to explore this phenomenon and the subsequent effect on the rectifying behavior of conical quartz nanopores.
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Affiliation(s)
- Emer B Farrell
- School of Chemistry, University College Dublin, Belfield, Dublin 4 D04 V1W8, Ireland
| | - Dominik Duleba
- School of Chemistry, University College Dublin, Belfield, Dublin 4 D04 V1W8, Ireland
| | - Robert P Johnson
- School of Chemistry, University College Dublin, Belfield, Dublin 4 D04 V1W8, Ireland
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Tan X, Lv C, Chen H. Advances of nanopore-based sensing techniques for contaminants evaluation of food and agricultural products. Crit Rev Food Sci Nutr 2022; 63:10866-10879. [PMID: 35687354 DOI: 10.1080/10408398.2022.2085238] [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] [Indexed: 11/03/2022]
Abstract
Food safety assurance systems are becoming more stringent in response to the growing food safety problems. Rapid, sensitive, and reliable detection technology is a prerequisite for the establishment of food safety assurance systems. Nanopore technology has been taken as one of the emerging technology capable of dealing with the detection of harmful contaminants as efficiently as possible due to the advantage of label-free, high-throughput, amplification-free, and rapid detection features. Start with the history of nanopore techniques, this review introduced the underlying knowledge of detection mechanism of nanopore-based sensing techniques. Meanwhile, sensing interfaces for the construction of nanopore sensors are comprehensively summarized. Moreover, this review covers the current advances of nanopore techniques in the application of food safety screening. Currently, the establishment of nanopore sensing devices is mainly based on the blocking current phenomenon. Sensing interfaces including biological nanopores, solid-state nanopores, DNA origami, and de novo designed nanopores can be used in the manufacture of sensing devices. Food harmful substances, including heavy metals, veterinary drugs, pesticide residues, food toxins, and other harmful substances can be quickly determined by nanopore-based sensors. Moreover, the combination of nanopore techniques with advanced materials has become one of the most effective methods to improve sensing properties.
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Affiliation(s)
- Xiaoyi Tan
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Chenyan Lv
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Hai Chen
- College of Food Science, Southwest University, Chongqing, China
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