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Potdar RP, Khollam YB, Shaikh SF, Raut RW, Pandit B, More PS. Evanescent wave sensor for potassium ion detection with special reference to agricultural application. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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2
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Wang D, Wang R, Peng W, Zhang J, Wang Y, Huang M, Zhang N, Duan Y, Fang Y. Experimental and DFT study of Cu(II) removed by Na-montmorillonite. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 87:834-851. [PMID: 36853765 DOI: 10.2166/wst.2023.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The experimental and theoretical studies on the adsorption of Cu(II) on the surface of Na-montmorillonite (Na-Mt) were reported. Effects of batch adsorption experimental parameters were studied. Density functional theory and molecular dynamics simulations were used to study the adsorption of Cu(II) on montmorillonite (001) surface. The adsorption reached equilibrium within 80 min and the adsorption capacity was 35.23 mg·g-1 at 25 °C. The adsorption data of Cu(II) were consistent with pseudo-second-order kinetics and Langmuir isotherm models. The adsorption process was dominated by physical adsorption (Ea was 37.08 kJ·mol-1) with spontaneous endothermic behavior. The influence of coexisting cations on the adsorption capacity of Cu(II) was Mg(II) > Co(II) > Ca(II) > Na(I). The simulation results demonstrated that there were no significant differences in the adsorption energy of Cu(II) at the four adsorption sites on the montmorillonite (001) surface. Cu(II) had more electron transfer than Na(I). The diffusion coefficient of Cu(II) in the aqueous solution system containing montmorillonite was 0.85×10-10 m2·s-1. Considerable amounts of Cu(II) ions were adsorbed at a distance of 0.26 and 2.25 Å from the montmorillonite (001) surface. The simulation results provided strong supporting evidence for experimental conclusions.
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Affiliation(s)
- Danqi Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Ruicong Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Wencai Peng
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail: ; Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
| | - Jinli Zhang
- School of Chemical Engineering, Tianjin University, Tianjin 300350, China
| | - Yi Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Minghui Huang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Na Zhang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Yanan Duan
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Ying Fang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
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Zhang L, Yang W, Zhang C, Pan R, Chen Q, Zhang L. Cu 2+-imprinted optical fiber SPR sensor for intelligent recognition. OPTICS EXPRESS 2022; 30:45525-45537. [PMID: 36522957 DOI: 10.1364/oe.476698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 11/03/2022] [Indexed: 06/17/2023]
Abstract
An optical fiber surface plasma resonance (SPR) sensor with MMF-TCF-MMF structure was designed to realize intelligent recognition of copper ions (Cu2+), and the selective adsorption sensitization was achieved by plating a layer of Cu2+-imprinted film on the surface of gold film excitation layer. Combining the principle of optical fiber interference and SPR, the proposed sensor realized the detection of the copper ions concentration through measuring the refractive index changes caused by ions adsorption on imprinted film. The Cu2+-imprinted optical fiber SPR sensor can realize the intelligent recognition and detection of copper ions in the complex environment and exhibits a detection sensitivity of -10.05 pm/ppm. The proposed sensor has tremendous development potential in practical application, and provides new ideas for the field of metal ions detection.
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Yuhana-Ariffin E, Sulaiman SS, Abdul Kadir Jilani N, Nokarajoo D, Abdul Razak NH, Derawi D, Hasbullah SA. A New Sensing Material Based on Tetraaza/SBA15 for Rapid Detection of Copper(II) Ion in Water. MEMBRANES 2022; 12:1152. [PMID: 36422142 PMCID: PMC9692354 DOI: 10.3390/membranes12111152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/05/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
A novel rapid and sensitive optical sensor for Cu2+ ion detection based on 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-7,14-dienium dibromide (TL) immobilized on Santa Barbara Amorphous (SBA-15) has been successfully developed. The inner and outer space of SBA15 allowed a high capacity of TL compound to immobilize onto it. FESEM (Field Emission Scanning Electron Microscopy) analysis was performed to confirm the morphology of TL-SBA15, while FTIR (Fourier Transform Infrared Spectroscopy) was utilized to confirm the interaction of TL−SBA15. A binding study of TL compound towards Cu2+ ion was performed via UV-vis solution study and binding titration. The stoichiometric binding ratio and binding constant value Kb of TL towards Cu2+ ion was 1:1 and 2.33 × 103 M−1, respectively. The optical reflectance sensor based on the TL compound is selective to Cu2+ ion and demonstrated a linear response over a Cu2+ ion concentration range of 1 × 10−7 M to 2 × 10−5 M, with a detection limit (LOD) of 1.02 × 10−7 M (R2 = 0.99) and fast response time of < 1 min. It showed high reproducibility, with a relative standard deviation (RSD) obtained at 0.47%. This optical sensor is reusable up to five consecutive times on Cu2+ ion by using 0.1 M EDTA with a pH of 6 as a regeneration solution, with a reversibility RSD value of 0.79%. The developed optical sensor provides a rapid and sensitive tool for Cu2+ ion detection in teabag samples, and the results align with those obtained by the ICP-MS standard method.
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Wang Z, Zhang W, Liu X, Li M, Lang X, Singh R, Marques C, Zhang B, Kumar S. Novel Optical Fiber-Based Structures for Plasmonics Sensors. BIOSENSORS 2022; 12:1016. [PMID: 36421134 PMCID: PMC9688463 DOI: 10.3390/bios12111016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/04/2022] [Accepted: 11/07/2022] [Indexed: 05/24/2023]
Abstract
Optical fiber sensors based on surface plasma technology have many unique advantages in specific applications such as extreme environmental monitoring, physical parameter determination, and biomedical indicators testing. In recent decades, various kinds of fiber probes with special structures were developed according to special processing such as tapering, splicing, etching, fiber balls, grating etc. In this paper, the fabrication technology, characteristics, development status and application scenarios of different special optical fiber structures are briefly reviewed, including common processing equipment. Furthermore, many special novel optical fiber structures reported in recent years are summarized, which have been used in various kinds of plasmonic sensing work. Then, the fiber-plasmonic sensors for practical applications are also introduced and examined in detail. The main aim of this review is to provide guidance and inspiration for researchers to design and fabricate special optical fiber structures, thus facilitating their further research.
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Affiliation(s)
- Zhi Wang
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Wen Zhang
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Xuecheng Liu
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Muyang Li
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Xianzheng Lang
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Ragini Singh
- College of Agronomy, Liaocheng University, Liaocheng 252059, China
| | - Carlos Marques
- Physics Department & I3N, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Bingyuan Zhang
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Santosh Kumar
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
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An Optical Fiber Sensor for Uranium Detection in Water. BIOSENSORS 2022; 12:bios12080635. [PMID: 36005031 PMCID: PMC9406232 DOI: 10.3390/bios12080635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 07/28/2022] [Accepted: 08/11/2022] [Indexed: 11/25/2022]
Abstract
An optical sensor for uranyl has been prepared based on a gold-plated D-shaped plastic optical fiber (POF) combined with a receptor consisting of a bifunctional synthetic molecule, 11-mercaptoundecylphosphonic acid (MUPA), with a phosphonic group for complexing the considered ion, and a sulfide moiety through which the molecule is fixed at the gold resonant surface as a molecular layer in an easy and reproducible way. The sensor is characterized by evaluating the response in function of the uranyl concentration in aqueous solutions of different compositions and real-life samples, such as tap water and seawater. The mechanism of the uranyl/MUPA interaction was investigated. Two different kinds of interactions of uranyl with the MUPA layer on gold from water are observed: a strong one and a weak one. In the presence of competing metal ions as Ca2+ and Mg2+, only the strong interaction takes place, with a high affinity constant (around 107 M−1), while a somewhat lower constant (i.e., around 106 M−1) is obtained in the presence of Mg2+ which forms stronger complexes with MUPA than Ca2+. Due to the high affinity and the good selectivity of the recognition element MUPA, a detection limit of a few μg L−1 is reached directly in natural water samples without any time-consuming sample pretreatment, making it possible for rapid, in situ controls of uranyl by the proposed sensor.
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Leitão C, Pereira SO, Marques C, Cennamo N, Zeni L, Shaimerdenova M, Ayupova T, Tosi D. Cost-Effective Fiber Optic Solutions for Biosensing. BIOSENSORS 2022; 12:575. [PMID: 36004971 PMCID: PMC9405647 DOI: 10.3390/bios12080575] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/22/2022] [Accepted: 07/22/2022] [Indexed: 05/13/2023]
Abstract
In the last years, optical fiber sensors have proven to be a reliable and versatile biosensing tool. Optical fiber biosensors (OFBs) are analytical devices that use optical fibers as transducers, with the advantages of being easily coated and biofunctionalized, allowing the monitorization of all functionalization and detection in real-time, as well as being small in size and geometrically flexible, thus allowing device miniaturization and portability for point-of-care (POC) testing. Knowing the potential of such biosensing tools, this paper reviews the reported OFBs which are, at the moment, the most cost-effective. Different fiber configurations are highlighted, namely, end-face reflected, unclad, D- and U-shaped, tips, ball resonators, tapered, light-diffusing, and specialty fibers. Packaging techniques to enhance OFBs' application in the medical field, namely for implementing in subcutaneous, percutaneous, and endoscopic operations as well as in wearable structures, are presented and discussed. Interrogation approaches of OFBs using smartphones' hardware are a great way to obtain cost-effective sensing approaches. In this review paper, different architectures of such interrogation methods and their respective applications are presented. Finally, the application of OFBs in monitoring three crucial fields of human life and wellbeing are reported: detection of cancer biomarkers, detection of cardiovascular biomarkers, and environmental monitoring.
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Affiliation(s)
- Cátia Leitão
- i3N, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal; (S.O.P.); (C.M.)
| | - Sónia O. Pereira
- i3N, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal; (S.O.P.); (C.M.)
| | - Carlos Marques
- i3N, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal; (S.O.P.); (C.M.)
| | - Nunzio Cennamo
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy; (N.C.); (L.Z.)
| | - Luigi Zeni
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy; (N.C.); (L.Z.)
| | - Madina Shaimerdenova
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (M.S.); (T.A.)
| | - Takhmina Ayupova
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (M.S.); (T.A.)
| | - Daniele Tosi
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (M.S.); (T.A.)
- Laboratory of Biosensors and Bioinstruments, National Laboratory Astana, Nur-Sultan 010000, Kazakhstan
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Higa AM, Moraes AS, Shimizu FM, Bueno RG, Peroni LA, Strixino FT, Sousa NAC, Deffune E, Bovolato ALC, Oliveira ON, Brum DG, Leite FL. Anti-aquaporin-4 immunoglobulin G colorimetric detection by silver nanoparticles. NANOMEDICINE : NANOTECHNOLOGY, BIOLOGY, AND MEDICINE 2022; 41:102531. [PMID: 35114406 DOI: 10.1016/j.nano.2022.102531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 11/19/2021] [Accepted: 01/10/2022] [Indexed: 10/19/2022]
Abstract
Neuromyelitis optica spectrum disorder (NMOSD) is an inflammatory and autoimmune disease whose biomarker is the anti-AQP4-IgG autoantibody that binds to aquaporin-4 (AQP4) protein. We introduced a nanosensor with a sensitivity of 84.6%, higher than the CBA's 76.5%. Using silver nanoparticles (AgNPs), we detected not only seropositive but also some false-negative patients previously classified with CBA. It consisted of AgNPs coated with one of a panel of 5 AQP4 epitopes. The ability in detecting the anti-AQP4-IgG in NMOSD patients depended on the epitope and synergy could be obtained by combining different epitopes. We demonstrated that NMOSD patients could easily be distinguished from healthy subjects and patients with multiple sclerosis. Using the most sensitive AQP461-70 peptide, we established a calibration curve to estimate the concentration of anti-AQP4-IgG in seropositive NMOSD patients. The ability to enhance the accuracy of the diagnosis may improve the prognosis of 10-27% of anti-AQP4-IgG seronegative patients worldwide.
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Affiliation(s)
- Akemi M Higa
- Universidade de São Paulo, Instituto de Medicina Tropical, São Paulo, SP, Brazil; Universidade Federal de São Carlos, Sorocaba, SP, Brazil
| | - Ariana S Moraes
- Universidade de São Paulo, Instituto de Medicina Tropical, São Paulo, SP, Brazil; Universidade Federal de São Carlos, Sorocaba, SP, Brazil
| | - Flávio M Shimizu
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, SP, Brazil
| | - Raquel G Bueno
- Universidade Federal de São Carlos, Sorocaba, SP, Brazil
| | - Luís A Peroni
- Rheabiotech Laboratory of Research and Development, Campinas, SP, Brazil
| | | | | | - Elenice Deffune
- Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Medicina, Botucatu, SP, Brazil
| | - Ana Lívia C Bovolato
- Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Medicina, Botucatu, SP, Brazil
| | - Osvaldo N Oliveira
- Universidade de São Paulo, Instituto de Física de São Carlos, São Carlos, SP, Brazil
| | - Doralina G Brum
- Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Medicina, Botucatu, SP, Brazil
| | - Fabio L Leite
- Universidade Federal de São Carlos, Sorocaba, SP, Brazil.
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Ewuzie U, Aku NO, Nwankpa SU. An appraisal of data collection, analysis, and reporting adopted for water quality assessment: A case of Nigeria water quality research. Heliyon 2021; 7:e07950. [PMID: 34585001 PMCID: PMC8450204 DOI: 10.1016/j.heliyon.2021.e07950] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/25/2021] [Accepted: 09/03/2021] [Indexed: 12/27/2022] Open
Abstract
The appropriate acquisition and processing of water quality data are crucial for water resource management. As such, published articles on water quality monitoring and assessment are meant to convey essential and reliable information to water quality experts, decision-makers, researchers, students, and the public. The implication is that such information must emanate from data obtained and analysed in an up-to-date, scientifically sound manner. Thus, inappropriate data analysis and reporting techniques could yield misleading results and mar the endeavours of achieving error-free conclusions. This study utilises the findings on water quality assessment in Nigeria over the last 20 years to reveal the likely trends in water quality research regarding data collection, data analysis, and reporting for physicochemical, bacteriological parameters, and trace organics. A total of 123 Web of Science and quartile ranked (Q1-Q4) published articles involving water quality assessment in Nigeria were analysed. Results indicated shortcomings in various aspects of data analysis and reporting. Consequently, we use simulated heatmaps and graphs to illustrate preferred ways of analysing, reporting, and visualising some regularly used descriptive and inferential statistics of water quality variables. Finally, we highlight alternative approaches to the customarily applied water quality assessment methods in Nigeria and emphasise other areas of deficiency that need attention for improved water quality research.
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Affiliation(s)
- Ugochukwu Ewuzie
- Analytical/Environmental Unit, Department of Pure and Industrial Chemistry, Abia State University, Nigeria
| | - Nnaemeka O Aku
- Medical Microbiology Unit, Department of Microbiology, University of Nigeria, Nsukka, Nigeria.,Public Health Unit, Department of Community Medicine, University of Nigeria, Enugu Campus, Nigeria
| | - Stephen U Nwankpa
- College of Pharmacy, Roseman University of Health Sciences, South Jordan UT, USA
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Liu Z, Li G, Zhang A, Zhou G, Huang X. Ultra-sensitive optical fiber sensor based on intermodal interference and temperature calibration for trace detection of copper (II) ions. OPTICS EXPRESS 2021; 29:22992-23005. [PMID: 34614575 DOI: 10.1364/oe.434687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
An ultrahigh sensitive optical fiber sensor for trace detection of Cu2+ concentration in aqueous solution with temperature calibration has been developed in this article. Based on the intermodal interference, the sensor is coated with a hydrogel sensing membrane with specific binding to Cu2+ on the no-core fiber/single mode fiber/no-core fiber structure by using our new spray coating method. The imidazole group in the sensing film combines with Cu2+ to produce chelation, which changes the refractive index of the sensing film. The Cu2+ at trace concentration can be detected by monitoring the displacement of the interference trough. The experimental limit of detection of 3.0×10-12 mol/L can be achieved with the spectral resolution of 0.02 nm. The sensor has also long-term stability of the concentration measurement with the average standard deviation of 1.610×10-12 mol/L over 2 hours observation time and can be compensated the influence of ambient temperature on concentration detection by conducting the temperature calibration. In addition, the sensor has the advantages of strong specificity, simple fabrication and low cost.
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Pesavento M, Zeni L, De Maria L, Alberti G, Cennamo N. SPR-Optical Fiber-Molecularly Imprinted Polymer Sensor for the Detection of Furfural in Wine. BIOSENSORS-BASEL 2021; 11:bios11030072. [PMID: 33807535 PMCID: PMC8001980 DOI: 10.3390/bios11030072] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/23/2021] [Accepted: 03/02/2021] [Indexed: 11/16/2022]
Abstract
A surface plasmon resonance (SPR) platform, based on a D-shaped plastic optical fiber (POF), combined with a biomimetic receptor, i.e., a molecularly imprinted polymer (MIP), is proposed to detect furfural (2-furaldheide, 2-FAL) in fermented beverages like wine. MIPs have been demonstrated to be a very convenient biomimetic receptor in the proposed sensing device, being easy and rapid to develop, suitable for on-site determinations at low concentrations, and cheap. Moreover, the MIP film thickness can be changed to modulate the sensing parameters. The possibility of performing single drop measurements is a further favorable aspect for practical applications. For example, the use of an SPR-MIP sensor for the analysis of 2-FAL in a real life matrix such as wine is proposed, obtaining a low detection limit of 0.004 mg L−1. The determination of 2-FAL in fermented beverages is becoming a crucial task, mainly for the effects of the furanic compounds on the flavor of food and their toxic and carcinogenic effect on human beings.
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Affiliation(s)
- Maria Pesavento
- Department of Chemistry, University of Pavia, Via Taramelli n.12, 27100 Pavia, Italy;
- Correspondence: ; Tel.: +39-0382-987580
| | - Luigi Zeni
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma n.29, 81031 Aversa, Italy; (L.Z.); (N.C.)
| | - Letizia De Maria
- Ricerca sul Sistema Energetico-RSE S.p.A.-Via R. Rubattino n.54, 20134 Milano, Italy;
| | - Giancarla Alberti
- Department of Chemistry, University of Pavia, Via Taramelli n.12, 27100 Pavia, Italy;
| | - Nunzio Cennamo
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma n.29, 81031 Aversa, Italy; (L.Z.); (N.C.)
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Liu T, Ding H, Zhan C, Huang J, Wang S. Simply and cost-effectively fabricated AuNP-based fusion spliced transmissive optical fiber LSPR probes. OPTICS EXPRESS 2021; 29:7398-7409. [PMID: 33726241 DOI: 10.1364/oe.417198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
The transmissive optical fiber localized surface plasmon resonance (LSPR) sensor has become an effective tool in refractive index sensing because of its compact structure, high sensitivity and strong designability. However, its special structure with the sensing region in the middle of the optical fiber leads to the shortcomings of difficult preparation and poor reproducibility, which greatly restricts its application scopes. In order to solve such problem, we design gold nanoparticle (AuNP)-based fusion spliced transmissive optical fiber LSPR probes, which are fabricated via the fusion splicing between the surface modified combination tapered optical fiber and another multimode quartz optical fiber but are totally different from other fabrications of the reported transmissive optical fiber LSPR probes. The fiber probe fabrication is rather simple and cost-effective, only relying on the procedures of combination tapered optical fiber preparation, surface modification and probe fusion splicing, and except for the probe fusion splicing, the other procedures can be mass prepared thus maintaining high efficiency and good reproducibility in fiber probe fabrications. Moreover, according to the experimental verifications, the proposed fiber probes can reach rather high sensitivity in refractive index sensing with high accuracy and good stability in both static and dynamic detecting modes. Therefore, the AuNP-based fusion spliced transmissive optical fiber LSPR probe is a preferred solution for refractive index sensing and can be widely used in various applications.
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Sousa RPCL, Figueira RB, Costa SPG, M. Raposo MM. Optical Fiber Sensors for Biocide Monitoring: Examples, Transduction Materials, and Prospects. ACS Sens 2020; 5:3678-3709. [PMID: 33226221 DOI: 10.1021/acssensors.0c01615] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Antifouling biocides are toxic to the marine environment impacting negatively on the aquatic ecosystems. These biocides, namely, tributyltin (TBT) and Cu(I) compounds, are used to avoid biofouling; however, their toxicity turns TBT and Cu(I) monitoring an important health issue. Current monitoring methods are expensive and time-consuming. This review provides an overview of the actual state of the art of antifouling paints' biocides, including their impact and toxicity, as well as the reported methods for TBT and Cu(I) detection over the past decade. The principles of optical fiber sensors (OFS) applications, with focus on environmental applications, and the use of organic chemosensors in this type of sensors are debated. The multiplexing ability of OFS and their application on aquatic environments are also discussed.
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Affiliation(s)
- Rui P. C. L. Sousa
- Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Rita B. Figueira
- Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Susana P. G. Costa
- Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - M. Manuela M. Raposo
- Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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