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Recent Advances in Chemical and Biological Sensors and Sensor Systems

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Special Issue Editors

Prof. Dr. Denise Wilson

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Guest Editor

Department of Electrical and Computer Engineering, University of Washington, Seattle, WA 98195, USA
Interests: chemical sensors; biological sensors; magnetic sensors; environmental monitoring; wearable sensors; photovoltaics
Special Issues, Collections and Topics in MDPI journals

Dr. Thad Roppel

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Guest Editor

Electrical and Computer Engineering Deptment, Auburn University, Auburn, AL 36849-5201, USA
Interests: robotics; sensors; artificial intelligence; K-12 outreach

Miss. Courtney Chheng

E-Mail Website
Guest Editor

Department of Electrical and Computer Engineering, University of Washington, Seattle, WA 98195, USA
Interests: magnetic sensors, gait monitoring, pattern recognition

Special Issue Information

Dear Colleagues,

The demand for chemical and biological sensors to meet the needs of real-world applications in healthcare, wearable sensing, food safety, environmental monitoring, defense, and multiple other sectors remains high, and biological and chemical market sales continue to grow globally at double digit levels. However, a wide range of technological and scientific barriers continue to hinder the commercial introduction of these sensors into many applications. Continuing research effort and advances in sensor technology are essential to meet demand and support solutions to critical societal problems. Advances in sensor and system engineering are equally important to support integration of working sensors into footprints whose cost, size, and power consumption are compatible with portable, mobile, and wearable sensing.

This Special Issue of Sensors invites researchers in engineering, chemistry, biology, and related fields to submit work at all levels of chemical and biological sensor development, from sensor materials to sensor systems and networks. Efforts that overcome existing and lasting barriers to the meaningful implementation of chemical and biological sensors in applications with critical relevance to the health and well-being of modern society are particularly welcome. Sensor technologies of interest include but are not limited to:

Electrochemical sensors;
Chemiresistors;
Surface plasmon resonance;
Piezoelectric;
Surface acoustic wave;
Thermometric;
Resonant and other microelectromechanical transduction mechanisms;
Optical sensors.

Examples of critical applications to which these sensor technologies can be applied include food safety, preventative and diagnostic healthcare, natural disaster response, air and water quality monitoring, precision agriculture, chemical and biological defense, and process control.

Prof. Dr. Denise Wilson
Dr. Thad Roppel
Dr. Courtney Chheng
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. Sensors 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 2600 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

chemical sensors
biological sensors
nanosensors
microsensors
sensor networks
wireless sensors
wearable sensors
portable sensors
food safety
healthcare
precision agriculture
indoor air quality
drinking water safety
wastewater management
defense
natural disaster response

Published Papers (2 papers)

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Research

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15 pages, 2758 KiB

Open AccessArticle

Application of Low-Cost Electrochemical Sensors to Aqueous Systems to Allow Automated Determination of NH₃ and H₂S in Water

by Malcolm Cämmerer, Thomas Mayer, Stefanie Penzel, Mathias Rudolph and Helko Borsdorf

Sensors 2020, 20(10), 2814; https://doi.org/10.3390/s20102814 - 15 May 2020

Cited by 6 | Viewed by 3057

Abstract

Usage of commercially available electrochemical gas sensors is currently limited by both the working range of the sensor with respect to temperature and humidity and the spikes in sensor response caused by sudden changes in temperature or humidity. Using a thermostatically controlled chamber, the sensor response of ammonia and hydrogen sulfide sensors was studied under extreme, rapidly changing levels of humidity with the aim of analyzing nebulized water samples. To protect the sensors from damage, the gas stream was alternated between a saturated gas stream from a Flow Blurring® nebulizer and a dry air stream. When switching between high and low humidity gas streams, the expected current spike was observed and mathematically described. Using this mathematical model, the signal response due to the change in humidity could be subtracted from the measured signal and the sensor response to the target molecule recorded. As the sensor response is determined by the model while the sensor is acclimatizing to the new humid conditions, a result is calculated faster than that by systems that rely on stable humidity. The use of the proposed mathematical model thus widens the scope of electrochemical gas sensors to include saturated gas streams, for example, from nebulized water samples, and gas streams with variable humidity. Full article

(This article belongs to the Special Issue Recent Advances in Chemical and Biological Sensors and Sensor Systems)

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Review

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29 pages, 15699 KiB

Open AccessReview

Chemical Sensors for Farm-to-Table Monitoring of Fruit Quality

by Denise Wilson

Sensors 2021, 21(5), 1634; https://doi.org/10.3390/s21051634 - 26 Feb 2021

Cited by 13 | Viewed by 5162

Abstract

Farm-to-table operations produce, transport, and deliver produce to consumers in very different ways than conventional, corporate-scale agriculture operations. As a result, the time it takes to get a freshly picked fruit to the consumer is relatively short and the expectations of the consumer for freshness and quality are high. Since many of these operations involve small farms and small businesses, resources to deploy sensors and instruments for monitoring quality are scarce compared to larger operations. Within stringent power, cost, and size constraints, this article analyzes chemical sensor technologies suitable for monitoring fruit quality from the point of harvest to consumption in farm-to-table operations. Approaches to measuring sweetness (sugar content), acidity (pH), and ethylene gas are emphasized. Not surprisingly, many instruments developed for laboratory use or larger-scale operations are not suitable for farm-to-table operations. However, there are many opportunities still available to adapt pH, sugar, and ethylene sensing to the unique needs of localized farm-to-table operations that can help these operations survive and expand well into the future. Full article

(This article belongs to the Special Issue Recent Advances in Chemical and Biological Sensors and Sensor Systems)

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