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Humidity Sensors Based on Nanomaterials

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Environmental Sensing".

Deadline for manuscript submissions: closed (10 July 2023) | Viewed by 2514

Special Issue Editors


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Guest Editor
Department of Electronic and Biomedical Engineering and Institute of Nanoscience and Nanotechnology, University of Barcelona, 08028 Barcelona, Spain
Interests: chemiresistive sensors; supercapacitors

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Guest Editor
1. Departament d’Enginyeria Electrònica i Biomedical, Universitat de Barcelona, E-08028 Barcelona, Spain
2. Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, E-08028 Barcelona, Spain
Interests: optoelectronics; semiconductor device physics; semiconductor physics; thin films and nanotechnology; nanoelectronics; nanofabrication; nanomaterials; nanostructured materials; semiconductor; nanoscience; photonic devices; biosensors

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Co-Guest Editor
Functional Materials Research Laboratory, School of Physical Sciences, PAH Solapur University, Solapur 413255, MS, India
Interests: conducting polymers; gas sensors

Special Issue Information

Dear Colleagues,

The monitoring and control of humidity help to ensure an energy-efficient environment, safety and quality of life, and have applications in many areas such as environment control, agriculture/medical/chemical applications, semiconductor industry, climatology, smart building control, and many others. Consequently, there is considerable interest in developing highly sensitive humidity-sensing devices with a high degree of merit. Over the last few years, many humidity sensors based on nanoscale materials were developed on the basis of different transduction principles (resistive, capacitive, optical, surface acoustic wave, etc.). However, various issues relating detection parameters, in terms of higher sensitivities, faster response/recovery kinetics, accuracy/repeatability, and long-term stability, remain challenging. In this respect, the main aim of this Special Issue is to promote new insights and knowledge concerning humidity sensors. Particular emphasis is placed on the research and development of resistive/capacitive/optical humidity sensors based on nanostructured materials. This Special Issue of Sensors can be used as a scientific platform for discussing the benefits and opportunities of humidity sensors based on nanostructured materials. Accordingly, we welcome original research and review articles on humidity sensors developed for a wide range of applications.

Dr. Sachin Navale
Prof. Dr. Albert Romano-Rodriguez
Dr. Manik Chougule
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

  • nanostructured materials
  • humidity sensors
  • binary/ternary metal oxides
  • carbon/polymer-based materials
  • nanocomposites
  • sensing principles
  • flexible/self-powered humidity sensors
  • healthcare/environment applications

Published Papers (1 paper)

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Research

12 pages, 6243 KiB  
Article
Wide-Range Humidity–Temperature Hybrid Flexible Sensor Based on Strontium Titanate and Poly 3,4 Ethylenedioxythiophene Polystyrene Sulfonate for Wearable 3D-Printed Mask Applications
by Adnan Ahmed, Afaque Manzoor Soomro, Darshan Kumar, Muhammad Waqas, Kashif Hussain Memon, Faheem Ahmed, Suresh Kumar, Hina Ashraf and Kyung Hyun Choi
Sensors 2023, 23(1), 401; https://doi.org/10.3390/s23010401 - 30 Dec 2022
Cited by 4 | Viewed by 1847
Abstract
In this paper, we report a fast, linear wide-range hybrid flexible sensor based on a novel composite of strontium titanate (SrTiO3) and poly 3,4 ethylenedioxythiophene polystyrene sulfonate (PEDOT: PSS) as a sensing layer. Inter-digitate electrodes (IDEs) were printed for humidity monitoring [...] Read more.
In this paper, we report a fast, linear wide-range hybrid flexible sensor based on a novel composite of strontium titanate (SrTiO3) and poly 3,4 ethylenedioxythiophene polystyrene sulfonate (PEDOT: PSS) as a sensing layer. Inter-digitate electrodes (IDEs) were printed for humidity monitoring (finger: 250 µm; spacing: 140 µm; length: 8 mm) whilst a meander-based pattern was printed for the temperature measurement (meander thickness: 180 µm; spacing: 400 µm) on each side of the PET substrate using silver ink. Moreover, active layers with different concentration ratios were coated on the electrodes using a spray coating technique. The as-developed sensor showed an excellent performance, with a humidity measurement range of (10–90% RH) and temperature measurement range of (25–90 °C) with a fast response (humidity: 5 s; temperature: 4.2 s) and recovery time (humidity: 8 s; temperature: 4.4 s). The reliability of the sensor during mechanical bending of up to 5.5 mm was validated with a reliable performance. The sensor was also used in real-world applications to measure human respiration. For this, a suggested sensor-based autonomous wireless node was included in a 3D-printed mask. The manufactured sensor was an excellent contender for wearable and environmental applications because of its exceptional performance, which allowed for the simultaneous measurement of both quantities by a single sensing device. Full article
(This article belongs to the Special Issue Humidity Sensors Based on Nanomaterials)
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