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Shin MJ, Shin JS. Two-Dimensional Estrone-Imprinted System on a Self-Assembled Monolayer. Polymers (Basel) 2024; 16:2035. [PMID: 39065351 PMCID: PMC11280610 DOI: 10.3390/polym16142035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2024] [Revised: 07/10/2024] [Accepted: 07/15/2024] [Indexed: 07/28/2024] Open
Abstract
In this study, a thin poly (methyl methacrylate) coating was formed on a self-assembled monolayer formed on a gold plate after chemically binding estrone. Subsequently, the estrone molecules were hydrolyzed and extracted using a solvent to form a molecular-imprinted system. The estrone-imprinted gold plate was then used as a working electrode to measure the estrone recognition ability through electrochemical methods. The recognition ability of this working electrode was evaluated for similar compounds. The selectivity factors for the seven estrone analogs were measured, and these values ranged from 0.19 to 0.67. According to the experimental results, the estrone-imprinted system showed good differentiation of estrone from other estrone analogs. Comparing these selectivity factors with those of a previous study on a cholesterol-imprinted system, the relative molecular size difference between the target molecule and similar molecules had a significant impact on the selectivity factor.
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Affiliation(s)
- Min Jae Shin
- Department of Chemical and Biological Engineering, Andong National University, Andong 36729, Gyeongbuk, Republic of Korea;
| | - Jae Sup Shin
- Department of Chemistry, Chungbuk National University, Cheongju 28644, Chungbuk, Republic of Korea
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2
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Taniya OS, Khasanov AF, Sadieva LK, Santra S, Nikonov IL, Al-Ithawi WKA, Kovalev IS, Kopchuk DS, Zyryanov GV, Ranu BC. Polymers and Polymer-Based Materials for the Detection of (Nitro-)explosives. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6333. [PMID: 37763611 PMCID: PMC10532833 DOI: 10.3390/ma16186333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/17/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023]
Abstract
Methods for the remote detection of warfare agents and explosives have been in high demand in recent times. Among the several detection methods, fluorescence methods appear to be more convenient due to their low cost, simple operation, fast response time, and naked-eye-visible sensory response. For fluorescence methods, a large variety of fluorescent materials, such as small-molecule-based fluorophores, aggregation-induced emission fluorophores/materials, and supramolecular systems, have been reported in the literature. Among them, fluorescent (bio)polymers/(bio)polymer-based materials have gained wide attention due to their excellent mechanical properties and sensory performance, their ability to recognize explosives via different sensing mechanisms and their combinations, and, finally, the so-called amplification of the sensory response. This review provides the most up-to-date data on the utilization of polymers and polymer-based materials for the detection of nitroaromatic compounds (NACs)/nitro-explosives (NEs) in the last decade. The literature data have been arranged depending on the polymer type and/or sensory mechanism.
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Affiliation(s)
- Olga S. Taniya
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
| | - Albert F. Khasanov
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
| | - Leila K. Sadieva
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
| | - Sougata Santra
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
| | - Igor L. Nikonov
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division), 22/20 S. Kovalevskoy/Akademicheskaya Str., 620219 Yekaterinburg, Russia
| | - Wahab K. A. Al-Ithawi
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
- Energy and Renewable Energies Technology Center, University of Technology-Iraq, Baghdad 10066, Iraq
| | - Igor S. Kovalev
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
| | - Dmitry S. Kopchuk
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division), 22/20 S. Kovalevskoy/Akademicheskaya Str., 620219 Yekaterinburg, Russia
| | - Grigory V. Zyryanov
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division), 22/20 S. Kovalevskoy/Akademicheskaya Str., 620219 Yekaterinburg, Russia
| | - Brindaban C. Ranu
- Chemical Engineering Institute, Ural Federal University, 19 Mira Str., 620002 Yekaterinburg, Russia; (O.S.T.); (A.F.K.); (L.K.S.); (S.S.); (I.L.N.); (W.K.A.A.-I.); (I.S.K.); (D.S.K.); (B.C.R.)
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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Klapec DJ, Czarnopys G, Pannuto J. Interpol review of the analysis and detection of explosives and explosives residues. Forensic Sci Int Synerg 2023; 6:100298. [PMID: 36685733 PMCID: PMC9845958 DOI: 10.1016/j.fsisyn.2022.100298] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Douglas J. Klapec
- Arson and Explosives Section I, United States Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, Forensic Science Laboratory, 6000 Ammendale Road, Ammendale, MD, 20705, USA
| | - Greg Czarnopys
- Forensic Services, United States Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, Forensic Science Laboratory, 6000 Ammendale Road, Ammendale, MD, 20705, USA
| | - Julie Pannuto
- United States Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, Forensic Science Laboratory, 6000 Ammendale Road, Ammendale, MD, 20705, USA
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Molecularly imprinted colloidal array for the high-throughput screening of explosives. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1016/j.cjac.2022.100215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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5
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Molecularly imprinted polymer (MIP)-Based sensing for detection of explosives: Current perspectives and future applications. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Heydarian‐Dehkordi N, Saei‐Dehkordi SS, Izadi Z, Ghasemi‐Varnamkhasti M. Development of an ultrasensitive molecularly imprinted poly-(ortho-phenylenediamine) based sensor for the determination of melamine adulteration in milk and infant formula. Food Sci Nutr 2022; 10:3154-3164. [PMID: 36171792 PMCID: PMC9469849 DOI: 10.1002/fsn3.2914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 04/16/2022] [Accepted: 04/23/2022] [Indexed: 11/15/2022] Open
Abstract
A sensitive molecularly imprinted poly-(ortho-phenylenediamine) electrochemical sensor was fabricated for selective melamine detection in milk and infant formula. The pencil graphite electrode (PGE) was modified by deposition of Au nanoparticles and reduced graphene oxide (RGO) on its surface. The fabrication of the electrode in various stages was monitored using cyclic voltammetry. The immobilized RGO, MIP, and gold nanoparticles on the PGE surface were morphologically characterized by field-emission scanning electron microscopy (FESEM). Under the optimized conditions, the linear range and the limit of detection (LOD) were 10-17-10-8 M and 2.64 × 10-16 M (S/N = 3), respectively. The prepared sensor exhibited a good reproducibility and repeatability response. The recovery range of melamine-spiked milk and infant formula was 92.7%-103.9% and 93.5%-105.8%, respectively. The sensor could apply successfully for melamine determination in milk and infant formula samples.
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Affiliation(s)
- Negin Heydarian‐Dehkordi
- Department of Food Hygiene and Quality ControlFaculty of Veterinary MedicineShahrekord UniversityShahrekordIran
| | | | - Zahra Izadi
- Department of Mechanical Engineering of BiosystemsFaculty of AgricultureShahrekord UniversityShahrekordIran
| | - Mahdi Ghasemi‐Varnamkhasti
- Department of Mechanical Engineering of BiosystemsFaculty of AgricultureShahrekord UniversityShahrekordIran
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He N, Li X, Luo Z, Wang L, Cui X, Fu Q. Preparation of molecularly imprinted foam for selective extraction of toxic monocrotaline from herbs. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1200:123273. [DOI: 10.1016/j.jchromb.2022.123273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/20/2022] [Accepted: 04/25/2022] [Indexed: 10/18/2022]
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8
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Abdallah A, Saher A, Molouk AFS, Mortada WI, Khalifa ME. Applications of electrochemical techniques for determination of anticoagulant drug (Rivaroxaban) in real samples. Biosens Bioelectron 2022; 208:114213. [DOI: 10.1016/j.bios.2022.114213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/20/2022] [Accepted: 03/21/2022] [Indexed: 11/26/2022]
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9
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KARUEHANON WEEANUCH, FUNFUENHA WATCHAREE, PHUTTAWONG NATTAPORN. Selective triphenylphosphine oxide imprinted polymer for solid scavenger application in organic synthesis. J CHEM SCI 2022. [DOI: 10.1007/s12039-021-02021-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Limthin D, Leepheng P, Klamchuen A, Phromyothin D. Enhancement of Electrochemical Detection of Gluten with Surface Modification Based on Molecularly Imprinted Polymers Combined with Superparamagnetic Iron Oxide Nanoparticles. Polymers (Basel) 2021; 14:91. [PMID: 35012114 PMCID: PMC8747701 DOI: 10.3390/polym14010091] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/17/2021] [Accepted: 12/23/2021] [Indexed: 12/25/2022] Open
Abstract
Novel molecularly imprinted polymers (MIPs) represent a selectively recognized technique for electrochemical detection design. This rapid and simple method prepared via chemical synthesis consists of a monomer crosslinked with an initiator, whereas low sensitivity remains a drawback. Nanomaterials can improve charge transfer for MIP surface modification in order to overcome this problem. SPIONs have semiconductor and superparamagnetic properties that can enhance carrier mobility, causing high sensitivity of electrochemical detection. In this work, surface modification was achieved with a combination of MIP and SPIONs for gluten detection. The SPIONs were synthesized via the chemical co-precipitation method and mixed with MIPs by polymerizing gluten and methyl methacrylate (MMA), presented as a template and a monomer. Magnetic MIP (MMIP) was modified on a carbon-plate electrode. The morphology of modified electrode surfaces was determined by scanning electron microscopy-energy-dispersive X-ray spectrometry. The performance of the MMIP electrode was confirmed by cyclic voltammetry, amperometry, and electrochemical impedance spectroscopy. The MMIP electrode for gluten detection shows a dynamic linear range of 5-50 ppm, with a correlation coefficient of 0.994 and a low detection limit of 1.50 ppm, which is less than the U.S. Food and Drug Administration requirements (20 ppm); moreover, it exhibits excellent selectivity, sensitivity, stability, and reproducibility.
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Affiliation(s)
- Dalawan Limthin
- College of Materials Innovation and Technology, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand; (D.L.); (P.L.)
| | - Piyawan Leepheng
- College of Materials Innovation and Technology, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand; (D.L.); (P.L.)
| | - Annop Klamchuen
- National Nanotechnology Center, National Science and Technology Development Agency, Patumthani 12120, Thailand;
| | - Darinee Phromyothin
- College of Materials Innovation and Technology, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand; (D.L.); (P.L.)
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Niu F, Shao ZW, Tao LM, Ding Y. Si-doped graphene nanosheets as a metal-free catalyst for electrochemical detection of nitroaromatic explosives. J Colloid Interface Sci 2021; 594:848-856. [PMID: 33794406 DOI: 10.1016/j.jcis.2021.03.091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/11/2021] [Accepted: 03/14/2021] [Indexed: 01/17/2023]
Abstract
Si-doped graphene nanosheets (SiGNS) have been successfully constructed via high temperature annealing of graphene oxide and tetraethoxysilane mixture in a sealed glass ampoule. The Si atoms doped into graphene's carbon network mainly existed as C3-Si-O and C2-Si-O2 configurations. The as-prepared SiGNS exhibited excellent electrochemical detection ability to nitroaromatic compounds in 0.1 M phosphoric acid buffer solution (PBS, pH = 8.0) via an electrochemical catalytic process. Five nitroaromatic compounds, including nitrobenzene, 2-nitrotoluene, 4-nitrotoluene, 2, 4-dinitrotoluene and 2, 4, 6-trinitrotoluene, were taken as the analyte to demonstrate the electrochemical catalytic ability of SiGNS. Density functional theory (DFT) calculation was carried out to explore the electrochemical catalytic mechanism of SiGNS. A hydrogen bond mediated electrochemical catalytic mechanism was proposed. Both the excellent electrical conductivity and the rich surface hydroxyl groups enhanced the electrochemical detection ability of SiGNS to nitroaromatic compounds. Si atoms in SiGNS played a key role for the excellent electrochemical detection ability of SiGNS due to most of the surface hydroxyl groups anchored on the Si atoms.
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Affiliation(s)
- Fang Niu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Zhen-Wu Shao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Li-Ming Tao
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
| | - Yong Ding
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China.
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Zarejousheghani M, Rahimi P, Borsdorf H, Zimmermann S, Joseph Y. Molecularly Imprinted Polymer-Based Sensors for Priority Pollutants. SENSORS (BASEL, SWITZERLAND) 2021; 21:2406. [PMID: 33807242 PMCID: PMC8037679 DOI: 10.3390/s21072406] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/27/2021] [Accepted: 03/29/2021] [Indexed: 01/05/2023]
Abstract
Globally, there is growing concern about the health risks of water and air pollution. The U.S. Environmental Protection Agency (EPA) has developed a list of priority pollutants containing 129 different chemical compounds. All of these chemicals are of significant interest due to their serious health and safety issues. Permanent exposure to some concentrations of these chemicals can cause severe and irrecoverable health effects, which can be easily prevented by their early identification. Molecularly imprinted polymers (MIPs) offer great potential for selective adsorption of chemicals from water and air samples. These selective artificial bio(mimetic) receptors are promising candidates for modification of sensors, especially disposable sensors, due to their low-cost, long-term stability, ease of engineering, simplicity of production and their applicability for a wide range of targets. Herein, innovative strategies used to develop MIP-based sensors for EPA priority pollutants will be reviewed.
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Affiliation(s)
- Mashaalah Zarejousheghani
- Institute of Electronic and Sensor Materials, Faculty of Materials Science and Materials Technology, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany; (P.R.); (Y.J.)
- Department Monitoring and Exploration Technologies, Helmholtz Centre for Environmental Research-UFZ, 04318 Leipzig, Germany;
| | - Parvaneh Rahimi
- Institute of Electronic and Sensor Materials, Faculty of Materials Science and Materials Technology, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany; (P.R.); (Y.J.)
| | - Helko Borsdorf
- Department Monitoring and Exploration Technologies, Helmholtz Centre for Environmental Research-UFZ, 04318 Leipzig, Germany;
| | - Stefan Zimmermann
- Department of Sensors and Measurement Technology, Institute of Electrical Engineering and Measurement Technology, Leibniz University Hannover, 30167 Hannover, Germany;
| | - Yvonne Joseph
- Institute of Electronic and Sensor Materials, Faculty of Materials Science and Materials Technology, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany; (P.R.); (Y.J.)
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Rational Design of Molecularly Imprinted Polymers Using Quaternary Ammonium Cations for Glyphosate Detection. SENSORS 2021; 21:s21010296. [PMID: 33406759 PMCID: PMC7795498 DOI: 10.3390/s21010296] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/15/2020] [Accepted: 12/30/2020] [Indexed: 01/22/2023]
Abstract
Molecularly imprinted polymers have emerged as cost-effective and rugged artificial selective sorbents for combination with different sensors. In this study, quaternary ammonium cations, as functional monomers, were systematically evaluated to design imprinted polymers for glyphosate as an important model compound for electrically charged and highly water-soluble chemical compounds. To this aim, a small pool of monomers were used including (3-acrylamidopropyl)trimethylammonium chloride, [2-(acryloyloxy)ethyl]trimethylammonium chloride, and diallyldimethylammonium chloride. The simultaneous interactions between three positively charged monomers and glyphosate were preliminary evaluated using statistical design of the experiment method. Afterwards, different polymers were synthesized at the gold surface of the quartz crystal microbalance sensor using optimized and not optimized glyphosate-monomers ratios. All synthesized polymers were characterized using atomic force microscopy, contact angle, Fourier-transform infrared, and X-ray photoelectron spectroscopy. Evaluated functional monomers showed promise as highly efficient functional monomers, when they are used together and at the optimized ratio, as predicted by the statistical method. Obtained results from the modified sensors were used to develop a simple model describing the binding characteristics at the surface of the different synthesized polymers. This model helps to develop new synthesis strategies for rational design of the highly selective imprinted polymers and to use as a sensing platform for water soluble and polar targets.
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Fast Detection of 2,4,6-Trinitrotoluene (TNT) at ppt Level by a Laser-Induced Immunofluorometric Biosensor. BIOSENSORS-BASEL 2020; 10:bios10080089. [PMID: 32764236 PMCID: PMC7460505 DOI: 10.3390/bios10080089] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/27/2020] [Accepted: 07/30/2020] [Indexed: 12/20/2022]
Abstract
The illegal use of explosives by terrorists and other criminals is an increasing issue in public spaces, such as airports, railway stations, highways, sports venues, theaters, and other large buildings. Security in these environments can be achieved by different means, including the installation of scanners and other analytical devices to detect ultra-small traces of explosives in a very short time-frame to be able to take action as early as possible to prevent the detonation of such devices. Unfortunately, an ideal explosive detection system still does not exist, which means that a compromise is needed in practice. Most detection devices lack the extreme analytical sensitivity, which is nevertheless necessary due to the low vapor pressure of nearly all explosives. In addition, the rate of false positives needs to be virtually zero, which is also very difficult to achieve. Here we present an immunosensor system based on kinetic competition, which is known to be very fast and may even overcome affinity limitation, which impairs the performance of many traditional competitive assays. This immunosensor consists of a monolithic glass column with a vast excess of immobilized hapten, which traps the fluorescently labeled antibody as long as no explosive is present. In the case of the explosive 2,4,6-trinitrotoluene (TNT), some binding sites of the antibody will be blocked, which leads to an immediate breakthrough of the labeled protein, detectable by highly sensitive laser-induced fluorescence with the help of a Peltier-cooled complementary metal-oxide-semiconductor (CMOS) camera. Liquid handling is performed with high-precision syringe pumps and chip-based mixing-devices and flow-cells. The system achieved limits of detection of 1 pM (1 ppt) of the fluorescent label and around 100 pM (20 ppt) of TNT. The total assay time is less than 8 min. A cross-reactivity test with 5000 pM solutions showed no signal by pentaerythritol tetranitrate (PETN), 1,3,5-trinitroperhydro-1,3,5-triazine (RDX), and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX). This immunosensor belongs to the most sensitive and fastest detectors for TNT with no significant cross-reactivity by non-related compounds. The consumption of the labeled antibody is surprisingly low: 1 mg of the reagent would be sufficient for more than one year of continuous biosensor operation.
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Selectivity of cholesterol-imprinted system on self-assembled monolayer. KOREAN J CHEM ENG 2020. [DOI: 10.1007/s11814-019-0434-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Bovine serum albumin-imprinted magnetic poly(2-pyrrolidone) microparticles for protein recognition. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2019.109375] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Fan C, Liu J, Zhao H, Li L, Liu M, Gao J, Ma L. Molecular imprinting on PtPd nanoflowers for selective recognition and determination of hydrogen peroxide and glucose. RSC Adv 2019; 9:33678-33683. [PMID: 35528877 PMCID: PMC9073546 DOI: 10.1039/c9ra05677g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 10/02/2019] [Indexed: 12/26/2022] Open
Abstract
PtPd nanoflowers (PtPd NFs) exhibit intrinsic peroxidase-like activity as nanozymes, but the nanozymes lack substrate specificity and have low catalytic activity. Herein, a molecularly imprinted nanogel on PtPd NFs was prepared by using 3,3',5,5'-tetramethylbenzidine (TMB) as the template through the aqueous precipitation polymerization method. After the TMB was washed out, many substrate binding pockets were retained in the PtPd NFs. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and powder X-ray diffraction (XRD) were employed to characterize the molecularly imprinted polymer (MIP) PtPd nanoflowers (T-MIP-PtPd NFs). The obtained T-MIP-PtPd NFs exhibited enhanced catalytic activity and specific recognition for TMB. Compared with PtPd NFs, T-MIP-PtPd NFs showed a linear range from 0.01-5000 μM and a detection limit of 0.005 μM toward the detection of H2O2. Glucose can also be sensitively detected through cascade reaction by the T-MIP-PtPd NFs and glucose oxidase. Therefore, molecular imprinting on nanozymes technology shows promising application in biocatalysis and sensing fields.
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Affiliation(s)
- Caini Fan
- Department of Hypertension, Henan Provincial People's Hospital Zheng Zhou 450003 China
| | - Junjia Liu
- School of Chemical Engineering and Technology, Hebei University of Technology Tianjin 300130 China
| | - Haiying Zhao
- Department of Hypertension, Henan Provincial People's Hospital Zheng Zhou 450003 China
| | - Ling Li
- Department of Hypertension, Henan Provincial People's Hospital Zheng Zhou 450003 China
| | - Min Liu
- Department of Hypertension, Henan Provincial People's Hospital Zheng Zhou 450003 China
| | - Jing Gao
- School of Chemical Engineering and Technology, Hebei University of Technology Tianjin 300130 China
| | - Li Ma
- School of Chemical Engineering and Technology, Hebei University of Technology Tianjin 300130 China
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Pacheco-Londoño LC, Ruiz-Caballero JL, Ramírez-Cedeño ML, Infante-Castillo R, Gálan-Freyle NJ, Hernández-Rivera SP. Surface Persistence of Trace Level Deposits of Highly Energetic Materials. Molecules 2019; 24:molecules24193494. [PMID: 31561514 PMCID: PMC6804148 DOI: 10.3390/molecules24193494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/12/2019] [Accepted: 09/16/2019] [Indexed: 12/05/2022] Open
Abstract
In the fields of Security and Defense, explosive traces must be analyzed at the sites of the terrorist events. The persistence on surfaces of these traces depends on the sublimation processes and the interactions with the surfaces. This study presents evidence that the sublimation process of these traces on stainless steel (SS) surfaces is very different than in bulk quantities. The enthalpies of sublimation of traces of four highly energetic materials: triacetone triperoxide (TATP), 2,4-dinitrotoluene (DNT), 2,4,6-trinitrotoluene (TNT), and 1,3,5- trinitrohexahydro-s-triazine (RDX) deposited on SS substrates were determined by optical fiber coupled-grazing angle probe Fourier Transform Infrared (FTIR) Spectroscopy. These were compared with enthalpies of sublimation determined by thermal gravimetric analysis for bulk amounts and differences between them were found. The sublimation enthalpy of RDX was very different for traces than for bulk quantities, attributed to two main factors. First, the beta-RDX phase was present at trace levels, unlike the case of bulk amounts which consisted only of the alpha-RDX phase. Second, an interaction between the RDX and SS was found. This interaction energy was determined using grazing angle FTIR microscopy. In the case of DNT and TNT, bulk and traces enthalpies were statistically similar, but it is evidenced that at the level of traces a metastable phase was observed. Finally, for TATP the enthalpies were statistically identical, but a non-linear behavior and a change of heat capacity values different from zero was found for both trace and bulk phases.
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Affiliation(s)
- Leonardo C Pacheco-Londoño
- R3-C Research and Education Component of ALERT DHS Center of Excellence for Explosives Research, Department of Chemistry, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR 00681, USA.
- School of Basic and Biomedical Sciences, Universidad Simón Bolívar, Barranquilla, 080020 Atlantico, Colombia.
| | - José L Ruiz-Caballero
- R3-C Research and Education Component of ALERT DHS Center of Excellence for Explosives Research, Department of Chemistry, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR 00681, USA.
- Joseph Smith & Sons Inc., Capitol Heights, MD 20743, USA.
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, VA 22030, USA.
| | - Michael L Ramírez-Cedeño
- R3-C Research and Education Component of ALERT DHS Center of Excellence for Explosives Research, Department of Chemistry, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR 00681, USA.
| | | | - Nataly J Gálan-Freyle
- R3-C Research and Education Component of ALERT DHS Center of Excellence for Explosives Research, Department of Chemistry, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR 00681, USA.
- School of Basic and Biomedical Sciences, Universidad Simón Bolívar, Barranquilla, 080020 Atlantico, Colombia.
| | - Samuel P Hernández-Rivera
- R3-C Research and Education Component of ALERT DHS Center of Excellence for Explosives Research, Department of Chemistry, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR 00681, USA.
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