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Optoelectronic Instrumentation and Measurement Strategies for Optical Chemical Sensing

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 12012

Special Issue Editors


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Guest Editor
Department of Electrical and Electronic Engineering, University of Oviedo, 33204 Gijon, Spain
Interests: smart sensors; embedded systems; biomedical signal processing
Special Issues, Collections and Topics in MDPI journals

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Co-Guest Editor
Department of Physical and Analytical Chemistry, University of Oviedo, 33006 Oviedo, Spain
Interests: applications of photoluminescent (bio)sensors based on nanomaterials for clinical, biomedical, agricultural, industrial or environmental monitoring
Special Issues, Collections and Topics in MDPI journals

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Co-Guest Editor
Department of Electrical, Electronic and Computers Engineering, University of Oviedo, 33204 Gijón, Spain
Interests: optoelectronic instrumentation for chemical and biological sensors; optical chemical sensors; fiber optic chemical sensors; near infrared spectroscopy

Special Issue Information

Dear Colleagues,

Currently, there is considerable interest in the development of specific, sensitive, low-cost and portable optoelectronic instrumentation, specially adapted to optical (bio)chemical sensing.

In this context recent developments of novel sensitive and selective materials play an important role when it is required the measurement of chemical and biochemical species in complex industrial, environmental, clinical of agrifood samples. In addition, fiber optic technology is widely applied in many optical measurement processes, because they have important advantages such as the high noise immunity and the possibility of its use for remote and multiposition measurements. The use of optical fibers in combination to chemical sensing materials allows the development of robust instrumentation for monitoring of target analytes in areas such as the chemical industry, biotechnology, medicine, environmental sciences, personal protection, etc.

On the other hand, advanced measurement methods, such as ratiometric measurements are an alternative to classical intensity or lifetime measurements due to their proved insensitivity to background light and instrumental fluctuations. Thus, they can be applied to the development of robust optical sensor instruments based on affordable optoelectronic components.

Therefore, based on spectroscopic measures, the development of low-cost, robust, easy handling and versatile portable opto-electronic instruments, for non-invasive and intact characterization and quantification of agri-food samples at field level, is a useful topic to contribute at real time decisions making for industry, farmers, researchers, etc.

This special issue is focused on the development of optoelectronic instrumentation and measurement strategies for optical chemical (bio)sensing. We invite researchers and investigators to contribute their original research or review articles to this special issue.

Prof. Francisco J. Ferrero Martín
Dr. Marta Valledor
Dr. Ana Soldado
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

A non-exhaustive list of topics of interest for this special issue is reported below

  • Optoelectronic instrumentation for chemical sensors
  • Optical chemical sensors
  • Fiber optic chemical sensors
  • Optical sensors based on measurement of photoluminescence
  • Ratiometric measurements for optical sensing
  • Optical chemical sensing strategies
  • Optical chemical sensors applications

Published Papers (4 papers)

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Research

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26 pages, 6355 KiB  
Article
Optoelectronic Instrumentation and Measurement Strategies for Optical Chemical (Bio)Sensing
by Francisco Ferrero Martín, Marta Valledor Llopis, Juan C. Campo Rodríguez, Alberto López Martínez, Ana Soldado Cabezuelo, María T. Fernández-Arguelles and José M. Costa-Fernández
Appl. Sci. 2021, 11(17), 7849; https://doi.org/10.3390/app11177849 - 26 Aug 2021
Cited by 3 | Viewed by 2895
Abstract
There is a growing interest in the development of sensitive, portable, and low-cost instrumentation for optical chemical (bio)sensing. Such instrumentation can allow real-time decision-making for industry, farmers, and researchers. The combination of optical fiber schemes, luminescence spectroscopy techniques, and new materials for sensor [...] Read more.
There is a growing interest in the development of sensitive, portable, and low-cost instrumentation for optical chemical (bio)sensing. Such instrumentation can allow real-time decision-making for industry, farmers, and researchers. The combination of optical fiber schemes, luminescence spectroscopy techniques, and new materials for sensor immobilization has allowed the growth of optical sensors. This article focuses on the development of low-cost optoelectronic instrumentation and measurement strategies for optical chemical (bio)sensing. Most of the articles in this field have focused on the chemical sensors themselves, although few have covered the design process for optoelectronic instrumentation. This article tries to fill this gap by presenting designs for real applications, as carried out by the authors. We also offer an introduction to the optical devices and optical measurement techniques used in this field to allow a full understanding of the applications. Full article
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12 pages, 3931 KiB  
Article
Detecting Relative Amplitude of IR Signals with Active Sensors and Its Application to a Positioning System
by Elena Aparicio-Esteve, Álvaro Hernández, Jesús Ureña, José Manuel Villadangos, Sergio Lluva and María Carmen Pérez-Rubio
Appl. Sci. 2020, 10(18), 6412; https://doi.org/10.3390/app10186412 - 14 Sep 2020
Cited by 5 | Viewed by 2091
Abstract
Nowadays, there is an increasing interest in smart systems, e.g., smart metering or smart spaces, for which active sensing plays an important role. In such systems, the sample or environment to be measured is irradiated with a signal (acoustic, infrared, radio-frequency…) and some [...] Read more.
Nowadays, there is an increasing interest in smart systems, e.g., smart metering or smart spaces, for which active sensing plays an important role. In such systems, the sample or environment to be measured is irradiated with a signal (acoustic, infrared, radio-frequency…) and some of their features are determined from the transmitted or reflected part of the original signal. In this work, infrared (IR) signals are emitted from different sources (four in this case) and received by a unique quadrature angular diversity aperture (QADA) sensor. A code division multiple access (CDMA) technique is used to deal with the simultaneous transmission of all the signals and their separation (depending on the source) at the receiver’s processing stage. Furthermore, the use of correlation techniques allows the receiver to determine the amount of energy received from each transmitter, by quantifying the main correlation peaks. This technique can be used in any system requiring active sensing; in the particular case of the IR positioning system presented here, the relative amplitudes of those peaks are used to determine the central incidence point of the light from each emitter on the QADA. The proposal tackles the typical phenomena, such as distortions caused by the transducer impulse response, the near-far effect in CDMA-based systems, multipath transmissions, the correlation degradation from non-coherent demodulations, etc. Finally, for each emitter, the angle of incidence on the QADA receiver is estimated, assuming that it is on a horizontal plane, although with any rotation on the vertical axis Z. With the estimated angles and the known positions of the LED emitters, the position (x, y, z) of the receiver is determined. The system is validated at different positions in a volume of 3 × 3 × 3.4 m3 obtaining average errors of 7.1, 5.4, and 47.3 cm in the X, Y and Z axes, respectively. Full article
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16 pages, 5281 KiB  
Article
Portable Instrument for Monitoring Environmental Toxins Using Immobilized Quantum Dots as the Sensing Material
by Francisco J. Ferrero, Marta Valledor, Juan C. Campo, Alberto López, Pablo Llano-Suárez, María T. Fernández-Arguelles, José M. Costa-Fernández and Ana Soldado
Appl. Sci. 2020, 10(9), 3246; https://doi.org/10.3390/app10093246 - 7 May 2020
Cited by 4 | Viewed by 2093
Abstract
A portable instrumental system was designed for the routine environmental monitoring of toxic volatile organic compounds (VOCs) in atmospheric conditions based on changes in the photoluminescence emission of semiconductor nanoparticles (quantum dots) entrapped in a sol-gel matrix as the solid sensing material. The [...] Read more.
A portable instrumental system was designed for the routine environmental monitoring of toxic volatile organic compounds (VOCs) in atmospheric conditions based on changes in the photoluminescence emission of semiconductor nanoparticles (quantum dots) entrapped in a sol-gel matrix as the solid sensing material. The sol-gel sensing material displayed a long-lived phosphorescent emission, which is quenched in the presence of trace levels of a volatile organic compound (acetone) in gaseous atmospheres. The developed instrument could measure and process the changes in the photoluminescence of the sensing material after exposure to gaseous acetone. The developed prototype device consists of a deep-ultraviolet ligtht-emitting diode (UV LED), which excites the chemical sensing material; an optical filter to remove scattered light and other non-desirable wavelengths; a photomultiplier tube (PMT) to convert the phosphorescence emission of the sensor phase to an electrical signal; and a microcontroller to correlate the signal with the analyte concentration. The developed prototype was evaluated for its ability to measure low levels of gaseous acetone in contaminated atmospheres with high sensitivity (detection limit: 9 ppm). The obtained results show the feasibility of this type of instrument for environmental analytical control purposes. Full article
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Review

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18 pages, 3174 KiB  
Review
Attenuated Total Reflection for Terahertz Modulation, Sensing, Spectroscopy and Imaging Applications: A Review
by Yuxin Huang, Ranjan Singh, Lijuan Xie and Yibin Ying
Appl. Sci. 2020, 10(14), 4688; https://doi.org/10.3390/app10144688 - 8 Jul 2020
Cited by 15 | Viewed by 4346
Abstract
Terahertz (THz) technique has become one of the most promising analytical methods and has been applied in many fields. Attenuated total reflection (ATR) technique applied in THz spectroscopy and imaging has been proven to be superior in functionalities such as modulation, sensing, analyzing, [...] Read more.
Terahertz (THz) technique has become one of the most promising analytical methods and has been applied in many fields. Attenuated total reflection (ATR) technique applied in THz spectroscopy and imaging has been proven to be superior in functionalities such as modulation, sensing, analyzing, and imaging. Here, we first provide a concise introduction to the principle of ATR, discuss the factors that impact the ATR system, and demonstrate recent advances on THz wave modulation and THz surface plasmon sensing based on the THz-ATR system. Then, applications on THz-ATR spectroscopy and imaging are reviewed. Towards the later part, the advantages and limitations of THz-ATR are summarized, and prospects of modulation, surface plasmon sensing, spectroscopy and imaging are discussed. Full article
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