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Kim KJ, Culp JT, Wuenschell J, Shugayev RA, Ohodnicki PR, Sekizkardes AK. Sorption-Induced Fiber Optic Plasmonic Gas Sensing via Small Grazing Angle of Incidence. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2301293. [PMID: 37432766 DOI: 10.1002/adma.202301293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 07/08/2023] [Accepted: 07/10/2023] [Indexed: 07/12/2023]
Abstract
Sensing technologies based on plasmonic nanomaterials are of interest for various chemical, biological, environmental, and medical applications. In this work, an incorporation strategy of colloidal plasmonic nanoparticles (pNPs) in microporous polymer for realizing distinct sorption-induced plasmonic sensing is reported. This approach is demonstrated by introducing tin-doped indium oxide pNPs into a polymer of intrinsic microporosity (PIM-1). The composite film (pNPs-polymer) provides distinct and tunable optical features on the fiber optic (FO) platform that can be used as a signal transducer for gas sensing (e.g., CO2 ) under atmospheric conditions. The resulting pNPs-polymer composite demonstrates high sensitivity response on FO in the evanescent field configuration, provided by the dramatic response of modes above the total-internal-reflection angle. Furthermore, by varying the pNPs content in the polymer matrix, the optical behavior of the pNPs-polymer composite film can be tuned to affect the operational wavelength by over several hundred nanometers and the sensitivity of the sensor in the near-infrared range. It is also shown that the pNPs-polymer composite film exhibits remarkable stability over a period of more than 10 months by mitigating the physical aging issue of the polymer.
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Affiliation(s)
- Ki-Joong Kim
- National Energy Technology Laboratory, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
- NETL Support Contractor, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
| | - Jeffrey T Culp
- National Energy Technology Laboratory, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
- NETL Support Contractor, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
| | - Jeffrey Wuenschell
- National Energy Technology Laboratory, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
- NETL Support Contractor, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
| | - Roman A Shugayev
- National Energy Technology Laboratory, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
| | - Paul R Ohodnicki
- National Energy Technology Laboratory, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
| | - Ali K Sekizkardes
- National Energy Technology Laboratory, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
- NETL Support Contractor, 626 Cochran Mill Road, Pittsburgh, PA, 15236, USA
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2
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Carrillo-Betancourt RA, López-Camero AD, Hernández-Cordero J. Luminescent Polymer Composites for Optical Fiber Sensors. Polymers (Basel) 2023; 15:polym15030505. [PMID: 36771805 PMCID: PMC9921745 DOI: 10.3390/polym15030505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/06/2023] [Accepted: 01/09/2023] [Indexed: 01/20/2023] Open
Abstract
Optical fiber sensors incorporating luminescent materials are useful for detecting physical parameters and biochemical species. Fluorescent materials integrated on the tips of optical fibers, for example, provide a means to perform fluorescence thermometry while monitoring the intensity or the spectral variations of the fluorescence signal. Similarly, certain molecules can be tracked by monitoring their characteristic emission in the UV wavelength range. A key element for these sensing approaches is the luminescent composite, which may be obtained upon allocating luminescent nanomaterials in glass or polymer hosts. In this work, we explore the fluorescence features of two composites incorporating lanthanide-doped fluorescent powders using polydimethylsiloxane (PDMS) as a host. The composites are obtained by a simple mixing procedure and can be subsequently deposited onto the end faces of optical fibers via dip coating or molding. Whereas one of the composites has shown to be useful for the fabrication of fiber optic temperature sensors, the other shows promising result for detection of UV radiation. The performance of both composites is first evaluated for the fabrication of membranes by examining features such as fluorescent stability. We further explore the influence of parameters such as particle concentration and density on the fluorescence features of the polymer blends. Finally, we demonstrate the incorporation of these PDMS fluorescent composites onto optical fibers and evaluate their sensing capabilities.
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3
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Nasir M, Waqas M, Bég OA, Ameen HFM, Zamri N, Guedri K, Eldin SM. Analysis of Nonlinear Convection-Radiation in Chemically Reactive Oldroyd-B Nanoliquid Configured by a Stretching Surface with Robin Conditions: Applications in Nano-Coating Manufacturing. MICROMACHINES 2022; 13:2196. [PMID: 36557495 PMCID: PMC9782562 DOI: 10.3390/mi13122196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Motivated by emerging high-temperature manufacturing processes deploying nano-polymeric coatings, the present study investigates nonlinear thermally radiative Oldroyd-B viscoelastic nanoliquid stagnant-point flow from a heated vertical stretching permeable surface. Robin (mixed derivative) conditions were utilized in order to better represent coating fabrication conditions. The nanoliquid analysis was based on Buongiorno's two-component model, which features Brownian movement and thermophoretic attributes. Nonlinear buoyancy force and thermal radiation formulations are included. Chemical reactions (constructive and destructive) were also considered since coating synthesis often features reactive transport phenomena. An ordinary differential equation model was derived from the primitive partial differential boundary value problem using a similarity approach. The analytical solutions were achieved by employing a homotopy analysis scheme. The influence of the emerging dimensionless quantities on the transport characteristics was comprehensively explained using appropriate data. The obtained analytical outcomes were compared with the literature and good correlation was achieved. The computations show that the velocity profile was diminished with an increasing relaxation parameter, whereas it was enhanced when the retardation parameter was increased. A larger thermophoresis parameter induces an increase in temperature and concentration. The heat and mass transfer rates at the wall were increased with incremental increases in the temperature ratio and first order chemical reaction parameters, whereas contrary effects were observed for larger thermophoresis, fluid relaxation and Brownian motion parameters. The simulations can be applied to the stagnated nano-polymeric coating of micromachines, robotic components and sensors.
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Affiliation(s)
- Muhammad Nasir
- Faculty of Informatics and Computing, Besut Campus, University Sultan Zainal Abidin, Besut 22200, Malaysia
| | - Muhammad Waqas
- NUTECH School of Applied Science and Humanities, National University of Technology, Islamabad 44000, Pakistan
- Department of Mechanical Engineering, Lebanese American University, Beirut 1102, Lebanon
| | - O. Anwar Bég
- Mechanical Engineering, School of Science, Engineering and Environment (SEE), Salford University, Manchester M5 4WT, UK
| | - Hawzhen Fateh M. Ameen
- Department of Petroleum Engineering, College of Engineering, Knowledge University, Erbil 44001, Iraq
| | - Nurnadiah Zamri
- Faculty of Informatics and Computing, Besut Campus, University Sultan Zainal Abidin, Besut 22200, Malaysia
| | - Kamel Guedri
- Mechanical Engineering Department, College of Engineering and Islamic Architecture, Umm Al-Qura University, P.O. Box 5555, Makkah 21955, Saudi Arabia
| | - Sayed M Eldin
- Center of Research, Faculty of Engineering, Future University in Egypt, New Cairo 11835, Egypt
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4
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Meira DI, Proença M, Rebelo R, Barbosa AI, Rodrigues MS, Borges J, Vaz F, Reis RL, Correlo VM. Chitosan Micro-Membranes with Integrated Gold Nanoparticles as an LSPR-Based Sensing Platform. BIOSENSORS 2022; 12:bios12110951. [PMID: 36354460 PMCID: PMC9687842 DOI: 10.3390/bios12110951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/19/2022] [Accepted: 10/27/2022] [Indexed: 05/05/2023]
Abstract
Currently, there is an increasing need to develop highly sensitive plasmonic sensors able to provide good biocompatibility, flexibility, and optical stability to detect low levels of analytes in biological media. In this study, gold nanoparticles (Au NPs) were dispersed into chitosan membranes by spin coating. It has been demonstrated that these membranes are particularly stable and can be successfully employed as versatile plasmonic platforms for molecular sensing. The optical response of the chitosan/Au NPs interfaces and their capability to sense the medium's refractive index (RI) changes, either in a liquid or gas media, were investigated by high-resolution localized surface plasmon resonance (HR-LSPR) spectroscopy, as a proof of concept for biosensing applications. The results revealed that the lowest polymer concentration (chitosan (0.5%)/Au-NPs membrane) presented the most suitable plasmonic response. An LSPR band redshift was observed as the RI of the surrounding media was incremented, resulting in a sensitivity value of 28 ± 1 nm/RIU. Furthermore, the plasmonic membrane showed an outstanding performance when tested in gaseous atmospheres, being capable of distinguishing inert gases with only a 10-5 RI unit difference. The potential of chitosan/Au-NPs membranes was confirmed for application in LSPR-based sensing applications, despite the fact that further materials optimization should be performed to enhance sensitivity.
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Affiliation(s)
- Diana I. Meira
- Physics Center of Minho and Porto Universities (CF-UM-UP), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
- 3 B’s Research Group, I3Bs—Research Institute on Biomaterials, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Biodegradables and Biomimetics of University of Minho, AvePark—Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
| | - Manuela Proença
- Physics Center of Minho and Porto Universities (CF-UM-UP), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
| | - Rita Rebelo
- 3 B’s Research Group, I3Bs—Research Institute on Biomaterials, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Biodegradables and Biomimetics of University of Minho, AvePark—Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associated Laboratory, AvePark, Zona Industrial da Gandra S. Claudio do Barco, Caldas das Taipas, 4806-909 Guimarães, Portugal
- Correspondence: (R.R.); (J.B.); Tel.: +351-253510900 (R.R.); +351-253510471 (J.B.)
| | - Ana I. Barbosa
- 3 B’s Research Group, I3Bs—Research Institute on Biomaterials, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Biodegradables and Biomimetics of University of Minho, AvePark—Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associated Laboratory, AvePark, Zona Industrial da Gandra S. Claudio do Barco, Caldas das Taipas, 4806-909 Guimarães, Portugal
| | - Marco S. Rodrigues
- Physics Center of Minho and Porto Universities (CF-UM-UP), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
| | - Joel Borges
- Physics Center of Minho and Porto Universities (CF-UM-UP), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LaPMET—Laboratory of Physics for Materials and Emergent Technologies, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- Correspondence: (R.R.); (J.B.); Tel.: +351-253510900 (R.R.); +351-253510471 (J.B.)
| | - Filipe Vaz
- Physics Center of Minho and Porto Universities (CF-UM-UP), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LaPMET—Laboratory of Physics for Materials and Emergent Technologies, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Rui L. Reis
- 3 B’s Research Group, I3Bs—Research Institute on Biomaterials, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Biodegradables and Biomimetics of University of Minho, AvePark—Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associated Laboratory, AvePark, Zona Industrial da Gandra S. Claudio do Barco, Caldas das Taipas, 4806-909 Guimarães, Portugal
| | - Vitor M. Correlo
- 3 B’s Research Group, I3Bs—Research Institute on Biomaterials, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Biodegradables and Biomimetics of University of Minho, AvePark—Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associated Laboratory, AvePark, Zona Industrial da Gandra S. Claudio do Barco, Caldas das Taipas, 4806-909 Guimarães, Portugal
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5
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Rincón Remolina MC, Peleato NM. Augmentation of field fluorescence measures for improved in situ contaminant detection. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 195:34. [PMID: 36287271 DOI: 10.1007/s10661-022-10652-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
This research proposes a new method that fuses data from the field and lab-based optical measures coupled with machine learning algorithms to quantify the concentrations of toxic contaminants found in fuels and oil sands process-affected water. Selected pairs of excitation/emission intensities at key wavelengths are inputs to an augmentation neural network (NN), trained using lab-based measurements, that generates synthetic high-resolution spectra. Then, an image processing NN is used to estimate the contaminant concentrations from the spectra generated from a few key wavelengths. The presented approach is tested using naphthenic acids, phenol, fluoranthene and pyrene spiked into natural waters. The spills or loss of containment of these contaminants represent a significant risk to the environment and public health, requiring accurate and rapid detection methods to protect the surrounding aquatic environment. Results were compared with models based on only the corresponding peak intensities of each contaminant and with an image processing NN using the original spectra. Naphthenic acids, fluoranthene and pyrene were easy to detect by all methods; however, performance for more challenging signals to identify, such as phenol, was optimized by the proposed method (peak picking with mean absolute error (MAE) of 30.48 µg/L, generated excitation-emission matrix with MAE of 8.30 µg/L). Results suggested that data fusion and machine learning techniques can improve the detection of contaminants in the aquatic environment at environmentally relevant concentrations.
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Affiliation(s)
| | - Nicolás M Peleato
- School of Engineering, The University of British Columbia Okanagan, 1137 Alumni Ave., Kelowna, BC, Canada, V1V 1V7
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6
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Analysis of the Polymer Two-Layer Protective Coating Impact on Panda-Type Optical Fiber under Bending. Polymers (Basel) 2022; 14:polym14183840. [PMID: 36145982 PMCID: PMC9501047 DOI: 10.3390/polym14183840] [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] [Received: 08/22/2022] [Revised: 09/06/2022] [Accepted: 09/13/2022] [Indexed: 11/17/2022] Open
Abstract
The article discusses the effects of thermal-force on the Panda-type optical fiber. The studies used a wide temperature range. The research used two thermal cycles with exposures to temperatures of 23, 60 and −60 °C. The field of residual stresses in the fiber formed during the drawing process was determined and applied. Panda was considered taking into account a two-layer viscoelastic polymer coating under conditions of tension winding on an aluminum coil in the framework of a contact problem. The paper investigated three variants of coil radius to analyze the effect of bending on fiber behavior. The effect of the coating thickness ratio on the system deformation and optical characteristics was analyzed. Qualitative and quantitative patterns of the effect of temperature, bending, thickness of individual polymer coating layers and relaxation transitions of their materials on the Panda optical fiber deformation and optical characteristics were established. Assessment of approaches to the calculation of optical characteristics (values of the refractive indices and fiber birefringence) are given in the framework of the study. The patterns of deformation and optical behavior of the Panda-type fiber with a protective coating, taking into account the nonlinear behavior of the system materials, were original results.
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7
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Rapid ultraviolet curing of epoxy acrylate films with low refractive index and strong interfacial adhesion. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Mariello M, Kim K, Wu K, Lacour SP, Leterrier Y. Recent Advances in Encapsulation of Flexible Bioelectronic Implants: Materials, Technologies, and Characterization Methods. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2201129. [PMID: 35353928 DOI: 10.1002/adma.202201129] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/13/2022] [Indexed: 06/14/2023]
Abstract
Bioelectronic implantable systems (BIS) targeting biomedical and clinical research should combine long-term performance and biointegration in vivo. Here, recent advances in novel encapsulations to protect flexible versions of such systems from the surrounding biological environment are reviewed, focusing on material strategies and synthesis techniques. Considerable effort is put on thin-film encapsulation (TFE), and specifically organic-inorganic multilayer architectures as a flexible and conformal alternative to conventional rigid cans. TFE is in direct contact with the biological medium and thus must exhibit not only biocompatibility, inertness, and hermeticity but also mechanical robustness, conformability, and compatibility with the manufacturing of microfabricated devices. Quantitative characterization methods of the barrier and mechanical performance of the TFE are reviewed with a particular emphasis on water-vapor transmission rate through electrical, optical, or electrochemical principles. The integrability and functionalization of TFE into functional bioelectronic interfaces are also discussed. TFE represents a must-have component for the next-generation bioelectronic implants with diagnostic or therapeutic functions in human healthcare and precision medicine.
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Affiliation(s)
- Massimo Mariello
- Laboratory for Processing of Advanced Composites (LPAC), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Kyungjin Kim
- Bertarelli Foundation Chair in Neuroprosthetic Technology, Laboratory for Soft Bioelectronic Interfaces, Institute of Electrical and MicroEngineering, Institute of Bioengineering, Centre for Neuroprosthetics, École Polytechnique Fédérale de Lausanne, Geneva, Switzerland
| | - Kangling Wu
- Bertarelli Foundation Chair in Neuroprosthetic Technology, Laboratory for Soft Bioelectronic Interfaces, Institute of Electrical and MicroEngineering, Institute of Bioengineering, Centre for Neuroprosthetics, École Polytechnique Fédérale de Lausanne, Geneva, Switzerland
| | - Stéphanie P Lacour
- Bertarelli Foundation Chair in Neuroprosthetic Technology, Laboratory for Soft Bioelectronic Interfaces, Institute of Electrical and MicroEngineering, Institute of Bioengineering, Centre for Neuroprosthetics, École Polytechnique Fédérale de Lausanne, Geneva, Switzerland
| | - Yves Leterrier
- Laboratory for Processing of Advanced Composites (LPAC), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland
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9
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A U-Shaped Optical Fiber Temperature Sensor Coated with Electrospinning Polyvinyl Alcohol Nanofibers: Simulation and Experiment. Polymers (Basel) 2022; 14:polym14102110. [PMID: 35631992 PMCID: PMC9145072 DOI: 10.3390/polym14102110] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/20/2022] [Accepted: 05/20/2022] [Indexed: 12/13/2022] Open
Abstract
This study describes the fabrication of an electrospun, U-shaped optical fiber sensor for temperature measurements. The sensor is based on single mode fibers and was fabricated into a U-shaped optical fiber sensor through flame heating. This study applied electrospinning to coat PVA, a polymer, onto the sensor layer to reduce its sensitivity to humidity. The sensor is used to measure temperature variations ranging from 30 °C to 100 °C. The objectives of this study were to analyze the sensitivity variation of the sensor with different sensor layer thicknesses resulting from different electrospinning durations, as well as to simulate the wavelength signals generated at different electrospinning durations using COMSOL. The results revealed that the maximum wavelength sensitivity, transmission loss sensitivity, and linearity of the sensor were 25 dBm/°C, 70 pm/°C, and 0.956, respectively. Longer electrospinning durations resulted in thicker sensor layers and higher sensor sensitivity, that wavelength sensitivity of the sensor increased by 42%.
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10
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Dalfen I, Borisov SM. Porous matrix materials in optical sensing of gaseous oxygen. Anal Bioanal Chem 2022; 414:4311-4330. [PMID: 35352161 PMCID: PMC9142480 DOI: 10.1007/s00216-022-04014-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 02/17/2022] [Accepted: 03/08/2022] [Indexed: 11/26/2022]
Abstract
The review provides comparison of porous materials that act as a matrix for luminescent oxygen indicators. These include silica-gels, sol–gel materials based on silica and organically modified silica (Ormosils), aerogels, electrospun polymeric nanofibers, metal–organic frameworks, anodized alumina, and various other microstructured sensor matrices. The influence of material structure and composition on the efficiency of oxygen quenching and dynamic response times is compared and the advantages and disadvantages of the materials are summarized to give a guide for design and practical application of sensors with desired sensitivity and response time.
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Affiliation(s)
- I Dalfen
- Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, 8010, Graz, Austria
| | - S M Borisov
- Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, 8010, Graz, Austria.
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11
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Ferric Ion Diffusion for MOF-Polymer Composite with Internal Boundary Sinks. NANOMATERIALS 2022; 12:nano12050887. [PMID: 35269374 PMCID: PMC8912586 DOI: 10.3390/nano12050887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/28/2022] [Accepted: 03/03/2022] [Indexed: 12/12/2022]
Abstract
Simple and economical ferric ion detection is necessary in many industries. An europium-based metal organic framework has selective sensing properties for solutions containing ferric ions and shows promise as a key component in a new sensor. We study an idealised sensor that consists of metal organic framework (MOF) crystals placed on a polymer surface. A two-dimensional diffusion model is used to predict the movement of ferric ions through the solution and polymer, and the ferric ion association to a MOF crystal at the boundary between the different media. A simplified one-dimensional model identifies the choice of appropriate values for the dimensionless parameters required to optimise the time for a MOF crystal to reach steady state. The model predicts that a large non-dimensional diffusion coefficient and an effective association with a small effective flux will reduce the time to steady-state. The effective dissociation is the most significant parameter to aid the estimation of the ferric ion concentration. This paper provides some theoretical insight for material scientists to optimise the design of a new ferric ion sensor.
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12
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Binding Analysis of Functionalized Multimode Optical-Fiber Sandwich-like Structure with Organic Polymer and Its Sensing Application for Humidity and Breath Monitoring. BIOSENSORS-BASEL 2021; 11:bios11090324. [PMID: 34562914 PMCID: PMC8469905 DOI: 10.3390/bios11090324] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/07/2021] [Accepted: 09/07/2021] [Indexed: 11/17/2022]
Abstract
In recent years, the chemical modification of optical fibers (OFs) has facilitated the manufacture of sensors because OFs can identify several analytes present in aqueous solutions or gas phases. Nevertheless, it is imperative better to understand the chemical interactions in this molecular system to generate low-cost and efficient sensors. This work presents a theoretical and experimental study of organic polymeric functionalized OF structures and proposes a cost-effective alternative to monitor breathing and humidity. The device is based on silicon optical fibers functionalized with (3-Aminopropyl) triethoxysilane (APTES) and alginate. The theoretical analysis is carried out to validate the activation of the silicon dioxide fiber surface; moreover, the APTES–alginate layer is discussed. The computational simulation suggests that water can be absorbed by alginate, specifically by the calcium atom linked to the carboxylic acid group of the alginate. The analysis also demonstrates a higher electrostatic interaction between the water and the OF–APTES–alginate system; this interaction alters the optical fiber activated surface’s refractive index, resulting in transmission power variation. The humidity analysis shows a sensitivity of 3.1288 mV/RH, a time response close to 25 s, and a recovery time around 8 s. These results were achieved in the range of 50 to 95% RH. Moreover, the recovery and response time allow the human breath to be studied. The proposed mechanism or device is competitive with prior works, and the components involved made this sensor a cost-effective alternative for medical applications.
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13
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Review of Structural Health Monitoring Techniques in Pipeline and Wind Turbine Industries. APPLIED SYSTEM INNOVATION 2021. [DOI: 10.3390/asi4030059] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
There has been enormous growth in the energy sector in the new millennium, and it has enhanced energy demand, creating an exponential rise in the capital investment in the energy industry in the last few years. Regular monitoring of the health of industrial equipment is necessary, and thus, the concept of structural health monitoring (SHM) comes into play. In this paper, the purpose is to highlight the importance of SHM systems and various techniques primarily used in pipelining industries. There have been several advancements in SHM systems over the years such as Point OFS (optical fiber sensor) for Corrosion, Distributed OFS for physical and chemical sensing, etc. However, these advanced SHM technologies are at their nascent stages of development, and thus, there are several challenges that exist in the industries. The techniques based on acoustic, UAVs (Unmanned Aerial Vehicles), etc. bring in various challenges, as it becomes daunting to monitor the deformations from both sides by employing only one technique. In order to determine the damages well in advance, it is necessary that the sensor is positioned inside the pipes and gives the operators enough time to carry out the troubleshooting. However, the mentioned technologies have been unable to indicate the errors, and thus, there is the requirement for a newer technology to be developed. The purpose of this review manuscript is to enlighten the readers about the importance of structural health monitoring in pipeline and wind turbine industries.
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Fabrication of Optical Fibers with Multiple Coatings for Swelling-Based Chemical Sensing. MICROMACHINES 2021; 12:mi12080941. [PMID: 34442564 PMCID: PMC8400377 DOI: 10.3390/mi12080941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 07/30/2021] [Accepted: 08/02/2021] [Indexed: 11/16/2022]
Abstract
We discuss distributed chemical sensing based on the swelling of coatings of optical fibers. Volume changes in the coating induce strain in the fiber's glass core, provoking a local change in the refractive index which is detectable by distributed fiber optical sensing techniques. We describe methods to realize different coatings on a single fiber. Simultaneous detection of swelling processes all along the fiber opens the possibility to interrogate thousands of differently functionalized sections on a single fiber. Principal component analysis is used to enable sensors for environmental monitoring, food analysis, agriculture, water quality monitoring, or medical diagnostics.
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15
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Sulaiman NI, Ngajikin NH, Che Abd Rashid N, Yaacob A, Yaacob M, Ibrahim MH, Cholan NA. Temperature sensing utilizing unclad plastic optical fiber with a balloon-like bent structure. APPLIED OPTICS 2021; 60:3895-3900. [PMID: 33983327 DOI: 10.1364/ao.419801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
A plastic optical fiber (POF) temperature sensor with high sensitivity is experimentally demonstrated in this work. The temperature sensor is realized by a combination of macrobending and an unclad region in the fabrication of its sensor head. The POF sensor is bent into a balloon-like structure in order to introduce the effect of macrobending. For the optimization of the sensor performance, the bending radius of the balloon-like structure is varied. Experimental results suggest that the performance is optimized when the bending radius is fixed at 55 mm. With this amount of bending radius, temperature sensitivity of up to ${22.2} \times {{1}}{{{0}}^{- 3}}^\circ {{\rm{C}}^{- 1}}$ can be achieved in the range from 40°C to 80°C, with linearity of 0.99 and resolution of 0.45°C. This technique is found to improve the POF temperature sensitivity in comparison to previous developments.
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16
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Sedighi S, Soto MA, Jderu A, Dorobantu D, Enachescu M, Ziegler D. Swelling-Based Distributed Chemical Sensing with Standard Acrylate Coated Optical Fibers. SENSORS 2021; 21:s21030718. [PMID: 33494419 PMCID: PMC7865366 DOI: 10.3390/s21030718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/16/2021] [Accepted: 01/18/2021] [Indexed: 01/08/2023]
Abstract
Distributed chemical sensing is demonstrated using standard acrylate coated optical fibers. Swelling of the polymer coating induces strain in the fiber’s silica core provoking a local refractive index change which is detectable all along an optical fiber by advanced distributed sensing techniques. Thermal effects can be discriminated from strain using uncoated fiber segments, leading to more accurate strain readings. The concept has been validated by measuring strain responses of various aqueous and organic solvents and different chain length alkanes and blends thereof. Although demonstrated on a short range of two meters using optical frequency-domain reflectometry, the technique can be applied to many kilometer-long fiber installations. Low-cost and insensitive to corrosion and electromagnetic radiation, along with the possibility to interrogate thousands of independent measurement points along a single optical fiber, this novel technique is likely to find applications in environmental monitoring, food analysis, agriculture, water quality monitoring, or medical diagnostics.
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Affiliation(s)
- Sina Sedighi
- NanoPRO START S.R.L., Oltenitei, No. 388, District 4, 041337 Bucharest, Romania; (S.S.); (A.J.); (D.D.)
| | - Marcelo A. Soto
- Department of Electronic Engineering, Universidad Técnica Federico Santa María, 2390123 Valparaíso, Chile;
| | - Alin Jderu
- NanoPRO START S.R.L., Oltenitei, No. 388, District 4, 041337 Bucharest, Romania; (S.S.); (A.J.); (D.D.)
- Center for Surface Science and Nanotechnology (CSSNT), University Politehnica Bucharest, 060042 Bucharest, Romania;
| | - Dorel Dorobantu
- NanoPRO START S.R.L., Oltenitei, No. 388, District 4, 041337 Bucharest, Romania; (S.S.); (A.J.); (D.D.)
- Center for Surface Science and Nanotechnology (CSSNT), University Politehnica Bucharest, 060042 Bucharest, Romania;
| | - Marius Enachescu
- Center for Surface Science and Nanotechnology (CSSNT), University Politehnica Bucharest, 060042 Bucharest, Romania;
- Academy of Romanian Scientists, 54 Splaiul Independentei, 050094 Bucharest, Romania
| | - Dominik Ziegler
- NanoPRO START S.R.L., Oltenitei, No. 388, District 4, 041337 Bucharest, Romania; (S.S.); (A.J.); (D.D.)
- Correspondence:
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Abstract
Optical biosensors have exhibited worthwhile performance in detecting biological systems and promoting significant advances in clinical diagnostics, drug discovery, food process control, and environmental monitoring. Without complexity in their pretreatment and probable influence on the nature of target molecules, these biosensors have additional advantages such as high sensitivity, robustness, reliability, and potential to be integrated on a single chip. In this review, the state of the art optical biosensor technologies, including those based on surface plasmon resonance (SPR), optical waveguides, optical resonators, photonic crystals, and optical fibers, are presented. The principles for each type of biosensor are concisely introduced and particular emphasis has been placed on recent achievements. The strengths and weaknesses of each type of biosensor have been outlined as well. Concluding remarks regarding the perspectives of future developments are discussed.
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Affiliation(s)
- Chen Chen
- College of Information Science and Technology, Dalian Maritime University, Dalian, 116026, China.
| | - Junsheng Wang
- College of Information Science and Technology, Dalian Maritime University, Dalian, 116026, China.
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18
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Yamada Y. Textile-integrated polymer optical fibers for healthcare and medical applications. Biomed Phys Eng Express 2020; 6. [PMID: 35027510 DOI: 10.1088/2057-1976/abbf5f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 10/08/2020] [Indexed: 01/09/2023]
Abstract
With ever growing interest in far-reaching solutions for pervasive healthcare and medicine, polymer optical fibers have been rendered into textile forms. Having both fiber-optic functionalities and traditional fabric-like comfort, textile-integrated polymer optical fibers have been advocated to remove the technical barriers for long-term uninterrupted health monitoring and treatment. In this context, this paper spotlights and reviews the recently developed textile-integrated polymer optical fibers in conjunction with fabrication techniques, applications in long-term continuous health monitoring and treatment, and future perspectives in the vision of mobile health (mHealth), as well as the introductory basics of polymer optical fibers. It is designed to serve as a topical guidepost for scientists and engineers on this highly interdisciplinary and rapidly growing topic.
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Long-Period Fiber Grating Sensor Based on a Conductive Polymer Functional Layer. Polymers (Basel) 2020; 12:polym12092023. [PMID: 32899753 PMCID: PMC7564938 DOI: 10.3390/polym12092023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/28/2020] [Accepted: 09/01/2020] [Indexed: 12/17/2022] Open
Abstract
A temperature sensor was fabricated with a functional conductive poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) coating on a long-period fiber grating (LPFG). The LPFG was fabricated by laser-assisted wet-chemical etching for controlling the grating depth of the LPFG after the treated surface of an optical fiber was inscribed by laser light. The functional conductive polymer acts as a temperature sustained sensing layer and enhances the grating depth of the LPFG sensor as a strain buffer at various temperatures. The sensor was subjected to three cycles of temperature measurement to investigate the sensor’s wavelength shift and energy loss when exposed to temperatures between 30 and 100 °C. Results showed that the sensor’s average wavelength sensitivity and its linearity were 0.052 nm/°C and 99%, respectively; average transmission sensitivity and linearity were 0.048 (dB/°C) and 95%, respectively.
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20
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Development and Characterization of UV-Resin Coated Fiber Bragg Gratings. SENSORS 2020; 20:s20113026. [PMID: 32471041 PMCID: PMC7309168 DOI: 10.3390/s20113026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/26/2020] [Accepted: 05/26/2020] [Indexed: 01/08/2023]
Abstract
We report the development and characterizations of a fiber Bragg grating (FBG) sensor coated with different ultraviolet (UV) curable resins. The UV-curable resins were applied on the fiber after the FBG inscription and cured with an UV lamp. One set of samples used the NOA 68 resin and the other used NOA 88. The samples were characterized with respect to the temperature, moisture absorption and strain response. Furthermore, in order to understand the influence of the resin coating on the optical fiber's mechanical properties, tensile tests were performed with the samples. Results show that all samples presented negligible sensitivity to moisture absorption in the 50-min long tests with the fibers immersed in a container filled with distillated water. Regarding the temperature responses, the coated FBGs presented higher sensitivity (13.84 pm/°C for NOA 88 and 12.76 pm/°C for NOA 68) than the uncoated FBGs due to the thermal expansion of the coatings. In the strain tests, all coated and uncoated samples presented similar sensitivities, but with a larger strain range applied for the coated samples (strains higher than 5500 µε) when compared with the uncoated samples (3500 µε). Moreover, the stress-strain curves of the coated samples indicated a Young's modulus one order with magnitude lower than the one of the uncoated silica fiber, where the lowest Young's modulus is 3.84 GPa and was obtained with the NOA 68 coating, which indicates the possibility of obtaining highly sensitive pressure and force sensors.
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21
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Kamaljith V, Tanner MG, Wood HAC, Harrington K, Choudhury D, Bradley M, Thomson RR. Ultrafast-laser-ablation-assisted spatially selective attachment of fluorescent sensors onto optical fibers. OPTICS LETTERS 2020; 45:2716-2719. [PMID: 32412449 DOI: 10.1364/ol.381018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 12/08/2019] [Indexed: 06/11/2023]
Abstract
A robust method to selectively attach specific fluorophores onto the individual cores of a multicore fiber is reported in this Letter. The method is based on the use of ultrafast laser pulses to nanostructure the facet of the fiber core, followed by amine functionalization and sensor conjugation. This surface-machining protocol not only enables precise spatial selectivity, but it also facilitates high deposition densities of the sensor moieties. As a proof of concept, the successful deposition of three different fluorophores onto selected cores of a multicore fiber is demonstrated. The protocol was developed to include attachment of a fluorescence-based pH sensor using the ratiometric carboxynapthofluorescein.
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Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations. COATINGS 2019. [DOI: 10.3390/coatings10010018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
There are numerous applications for thin films based chemical pH sensors, in such areas as biomedical, military, environmental, food, and consumer products. pH sensitive films fabricated through the ionic self-assembled monolayers technique were made of polyelectrolyte polyallylamine hydrochloride and the water-soluble organic dye molecule Direct Yellow 4. The films were monitored in various environmental conditions and for selected periods, at temperatures varying between −13.7 and 46.2 °C. Absorbance measurements and atomic force microscopy performed before and after thermal treatment indicate that for optimized thickness and composition the films maintain their functionality and are not affected by long-term exposure at these temperatures.
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23
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Wright RF, Lu P, Devkota J, Lu F, Ziomek-Moroz M, Ohodnicki PR. Corrosion Sensors for Structural Health Monitoring of Oil and Natural Gas Infrastructure: A Review. SENSORS 2019; 19:s19183964. [PMID: 31540327 PMCID: PMC6767297 DOI: 10.3390/s19183964] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 09/10/2019] [Accepted: 09/10/2019] [Indexed: 12/16/2022]
Abstract
Corrosion has been a great concern in the oil and natural gas industry costing billions of dollars annually in the U.S. The ability to monitor corrosion online before structural integrity is compromised can have a significant impact on preventing catastrophic events resulting from corrosion. This article critically reviews conventional corrosion sensors and emerging sensor technologies in terms of sensing principles, sensor designs, advantages, and limitations. Conventional corrosion sensors encompass corrosion coupons, electrical resistance probes, electrochemical sensors, ultrasonic testing sensors, magnetic flux leakage sensors, electromagnetic sensors, and in-line inspection tools. Emerging sensor technologies highlight optical fiber sensors (point, quasi-distributed, distributed) and passive wireless sensors such as passive radio-frequency identification sensors and surface acoustic wave sensors. Emerging sensors show great potential in continuous real-time in-situ monitoring of oil and natural gas infrastructure. Distributed chemical sensing is emphasized based on recent studies as a promising method to detect early corrosion onset and monitor corrosive environments for corrosion mitigation management. Additionally, challenges are discussed including durability and stability in extreme and harsh conditions such as high temperature high pressure in subsurface wellbores.
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Affiliation(s)
- Ruishu F Wright
- National Energy Technology Laboratory, Pittsburgh, PA 15236, USA.
- Leidos Research Support Team, Pittsburgh, PA 15236, USA.
| | - Ping Lu
- National Energy Technology Laboratory, Pittsburgh, PA 15236, USA.
- Leidos Research Support Team, Pittsburgh, PA 15236, USA.
| | - Jagannath Devkota
- National Energy Technology Laboratory, Pittsburgh, PA 15236, USA.
- Leidos Research Support Team, Pittsburgh, PA 15236, USA.
| | - Fei Lu
- National Energy Technology Laboratory, Pittsburgh, PA 15236, USA.
| | | | - Paul R Ohodnicki
- National Energy Technology Laboratory, Pittsburgh, PA 15236, USA.
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24
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Rico-Yuste A, Carrasco S. Molecularly Imprinted Polymer-Based Hybrid Materials for the Development of Optical Sensors. Polymers (Basel) 2019; 11:E1173. [PMID: 31336762 PMCID: PMC6681127 DOI: 10.3390/polym11071173] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/04/2019] [Accepted: 07/08/2019] [Indexed: 12/18/2022] Open
Abstract
We report on the development of new optical sensors using molecularly imprinted polymers (MIPs) combined with different materials and explore the novel strategies followed in order to overcome some of the limitations found during the last decade in terms of performance. This review pretends to offer a general overview, mainly focused on the last 3 years, on how the new fabrication procedures enable the synthesis of hybrid materials enhancing not only the recognition ability of the polymer but the optical signal. Introduction describes MIPs as biomimetic recognition elements, their properties and applications, emphasizing on each step of the fabrication/recognition procedure. The state of the art is presented and the change in the publication trend between electrochemical and optical sensor devices is thoroughly discussed according to the new fabrication and micro/nano-structuring techniques paving the way for a new generation of MIP-based optical sensors. We want to offer the reader a different perspective based on the materials science in contrast to other overviews. Different substrates for anchoring MIPs are considered and distributed in different sections according to the dimensionality and the nature of the composite, highlighting the synergetic effect obtained as a result of merging both materials to achieve the final goal.
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Affiliation(s)
| | - Sergio Carrasco
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.
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25
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Optical Planar Waveguide Sensor with Integrated Digitally-Printed Light Coupling-in and Readout Elements. SENSORS 2019; 19:s19132856. [PMID: 31252582 PMCID: PMC6651219 DOI: 10.3390/s19132856] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/20/2019] [Accepted: 06/25/2019] [Indexed: 12/22/2022]
Abstract
Optical planar waveguide sensors, able to detect and process information from the environment in a fast, cost-effective, and remote fashion, are of great interest currently in different application areas including security, metrology, automotive, aerospace, consumer electronics, energy, environment, or health. Integration of networks of these systems together with other optical elements, such as light sources, readout, or detection systems, in a planar waveguide geometry is greatly demanded towards more compact, portable, and versatile sensing platforms. Herein, we report an optical temperature sensor with a planar waveguide architecture integrating inkjet-printed luminescent light coupling-in and readout elements with matched emission and excitation. The first luminescent element, when illuminated with light in its absorption band, emits light that is partially coupled into the propagation modes of the planar waveguide. Remote excitation of this element can be performed without the need for special alignment of the light source. A thermoresponsive liquid crystal-based film regulates the amount of light coupled out from the planar waveguide at the sensing location. The second luminescent element partly absorbs the waveguided light that reaches its location and emits at longer wavelengths, serving as a temperature readout element through luminescence intensity measurements. Overall, the ability of inkjet technology to digitally print luminescent elements demonstrates great potential for the integration and miniaturization of light coupling-in and readout elements in optical planar waveguide sensing platforms.
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26
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Coppola S, Nasti G, Vespini V, Mecozzi L, Castaldo R, Gentile G, Ventre M, Netti PA, Ferraro P. Quick liquid packaging: Encasing water silhouettes by three-dimensional polymer membranes. SCIENCE ADVANCES 2019; 5:eaat5189. [PMID: 31139742 PMCID: PMC6534387 DOI: 10.1126/sciadv.aat5189] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 04/17/2019] [Indexed: 05/05/2023]
Abstract
One of the most important substances on Earth is water. It is an essential medium for living microorganisms and for many technological and industrial processes. Confining water in an enclosed compartment without manipulating it or by using rigid containers can be very attractive, even more if the container is biocompatible and biodegradable. Here, we propose a water-based bottom-up approach for facile encasing of short-lived water silhouettes by a custom-made adaptive suit. A biocompatible polymer self-assembling with unprecedented degree of freedom over the water surface directly produces a thin membrane. The polymer film could be the external container of a liquid core or a free-standing layer with personalized design. The membranes produced have been characterized in terms of physical properties, morphology and proposed for various applications from nano- to macroscale. The process appears not to harm cells and microorganisms, opening the way to a breakthrough approach for organ-on-chip and lab-in-a-drop experiments.
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Affiliation(s)
- Sara Coppola
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello,” Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Giuseppe Nasti
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello,” Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Veronica Vespini
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello,” Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Laura Mecozzi
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello,” Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Rachele Castaldo
- Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Gennaro Gentile
- Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Maurizio Ventre
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Paolo A. Netti
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
- Center for Advanced Biomaterials For Healthcare @CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125 Naples, Italy
| | - Pietro Ferraro
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello,” Via Campi Flegrei 34, 80078 Pozzuoli, Italy
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27
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Rivero PJ, Goicoechea J, Arregui FJ. Layer-by-Layer Nano-assembly: A Powerful Tool for Optical Fiber Sensing Applications. SENSORS (BASEL, SWITZERLAND) 2019; 19:E683. [PMID: 30736483 PMCID: PMC6387403 DOI: 10.3390/s19030683] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/01/2019] [Accepted: 02/05/2019] [Indexed: 12/13/2022]
Abstract
The ability to tune the composition of nanostructured thin films is a hot topic for the design of functional coatings with advanced properties for sensing applications. The control of the structure at the nanoscale level enables an improvement of intrinsic properties (optical, chemical or physical) in comparison with the traditional bulk materials. In this sense, among all the known nanofabrication techniques, the layer-by-layer (LbL) nano-assembly method is a flexible, easily-scalable and versatile approach which makes possible precise control of the coating thickness, composition and structure. The development of sensitive nanocoatings has shown an exceptional growth in optical fiber sensing applications due to their self-assembling ability with oppositely charged components in order to obtain a multilayer structure. This nanoassembly technique is a powerful tool for the incorporation of a wide variety of species (polyelectrolytes, metal/metal oxide nanoparticles, hybrid particles, luminescent materials, dyes or biomolecules) in the resultant multilayer structure for the design of high-performance optical fiber sensors. In this work we present a review of applications related to optical fiber sensors based on advanced LbL coatings in two related research areas of great interest for the scientific community, namely chemical sensing (pH, gases and volatile organic compounds detection) as well as biological/biochemical sensing (proteins, immunoglobulins, antibodies or DNA detection).
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Affiliation(s)
- Pedro J Rivero
- Materials Engineering Laboratory, Department of Engineering, Public University of Navarre, Campus Arrosadía S/N, 31006 Pamplona, Spain.
- Institute for Advanced Materials (INAMAT), Public University of Navarre, Campus Arrosadía S/N, 31006 Pamplona, Spain.
| | - Javier Goicoechea
- Nanostructured Optical Devices Laboratory, Department of Electric, Electronic and Communication Engineering, Public University of Navarre, Campus Arrosadía S/N, 31006 Pamplona, Spain.
- Institute of Smart Cities (ISC), Public University of Navarre, Campus Arrosadía S/N, 31006 Pamplona, Spain.
| | - Francisco J Arregui
- Nanostructured Optical Devices Laboratory, Department of Electric, Electronic and Communication Engineering, Public University of Navarre, Campus Arrosadía S/N, 31006 Pamplona, Spain.
- Institute of Smart Cities (ISC), Public University of Navarre, Campus Arrosadía S/N, 31006 Pamplona, Spain.
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Huang YJ, Chang R, Zhu QJ. Synthesis and Characterization of a Molecularly Imprinted Polymer of Spermidine and the Exploration of Its Molecular Recognition Properties. Polymers (Basel) 2018; 10:E1389. [PMID: 30961314 PMCID: PMC6401967 DOI: 10.3390/polym10121389] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 12/08/2018] [Accepted: 12/12/2018] [Indexed: 11/17/2022] Open
Abstract
Spermidine is a functional ingredient that can extend the lifespan of many foods and indicate meat safety. However, its synthesis and enrichment is expensive and complex. To develop an effective separation material that can offer highly selective recognition of spermidine, we first applied non-covalent molecular imprinting technology using methacrylic acid as a functional monomer, azobisisobutyronitrile as an initiator, and ethylene glycol dimethacrylate as a cross-linker. The adsorption properties of the polymers were analyzed using the Scatchard equation, the Lagergren kinetic equation, and the static distribution coefficient. The optimal polymerization molar ratio of the template molecule spermidine to the functional monomer was 1:4, the maximum adsorption amount was 97.75 μmol/g, and the adsorption equilibrium time was 300 min. The selective experiment showed that the interfering substances tyramine and histamine had selectivity factor α values of 2.01 and 1.78, respectively, indicating that the prepared polymer had good spermidine recognition ability. The density function theory calculations showed that the hydrogen bond strength, steric effect, and product energy caused adsorption and separation differences among the different imprinted polymer complexes.
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Affiliation(s)
- Yu-Jie Huang
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
- College of Food Safety, Guizhou Medical University, Guiyang 550025, China.
| | - Rui Chang
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
| | - Qiu-Jin Zhu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang, 550025, China.
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