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Two-Dimensional (2D) Metal Oxide-Enabled Electrochemical and Gas Sensors

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

Deadline for manuscript submissions: 25 October 2026 | Viewed by 1108

Special Issue Editors


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Guest Editor
School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, VIC 3001, Australia
Interests: raman spectroscopy; gas sensors; electrochemistry; nanoelectronics; nanomaterials; bio-sensors; electro-optical-thermal

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Guest Editor
School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, VIC 3001, Australia
Interests: advanced materials and nano-electronics; gas sensors and smart sensing systems; sustainable and climate-adaptive engineering technologies; ultrathin metal-oxide electronics and memristor-based gas sensors

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Guest Editor Assistant
School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, VIC 3001, Australia
Interests: materials science; nanotechnology; microscopy and spectroscopy; catalysis; sensing; analytical chemistry

Special Issue Information

Dear Colleagues,

Environmental pollution is becoming increasingly concerning, representing one of the biggest challenges in modern society today. Tons of toxic and harmful substances are released to the environment every day from different industrial processes, mobile sources, etc. These contaminants present a threat to the environment, and exposure to them can lead to the development of serious health conditions, even cancer. Therefore, it is important to monitor the presence and concentration of these substances before releasing them to the atmosphere. In recent years, sensors, particularly gas and electrochemical sensors developed from 2D metal oxides, have garnered increasing interest in this regard. Therefore, this Special Issue welcomes submissions on, but not limited to, the following topics:

  • Environmental sensors;
  • Environmental pollution;
  • Smart/intelligent/digital gas sensors;
  • Electrochemical gas sensors;
  • Electrochemical ion sensors;
  • Electrochemical dye sensors;
  • Nanosensors;
  • 2D materials;
  • Memristor-based gas sensors (Gasistors);
  • Metal oxide sensors;
  • Metal oxide semiconductors (MOSs).

Prof. Dr. Jianzhen Ou
Dr. Azmira Jannat
Guest Editors

Dr. Sanjida Afrin
Guest Editor Assistant

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 250 words) can be sent to the Editorial Office for assessment.

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

  • environmental sensors
  • environmental pollution
  • smart/intelligent/digital gas sensors
  • electrochemical gas sensors
  • electrochemical ion sensors
  • electrochemical dye sensors
  • nanosensors
  • 2D materials
  • memristor-based gas sensors (gasistors)
  • metal oxide sensors
  • metal oxide semiconductors (MOSs)

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Published Papers (1 paper)

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Research

13 pages, 7788 KB  
Article
Precision Gas Sensing Interface Circuit with Digital Potentiometer-Based Dynamic Gain Control
by Soon-Kyu Kwon and Hyeon-June Kim
Sensors 2026, 26(9), 2887; https://doi.org/10.3390/s26092887 - 5 May 2026
Viewed by 926
Abstract
This paper proposes a digital potentiometer-based adaptive gas sensor interface for stable detection without signal saturation under extreme environmental fluctuations. Conventional fixed-gain circuits often suffer from limited dynamic range, leading to data loss when severe baseline drifts exceed ADC input limits. To address [...] Read more.
This paper proposes a digital potentiometer-based adaptive gas sensor interface for stable detection without signal saturation under extreme environmental fluctuations. Conventional fixed-gain circuits often suffer from limited dynamic range, leading to data loss when severe baseline drifts exceed ADC input limits. To address this, we developed a real-time control algorithm that actively adjusts attenuator and amplifier gains, maintaining the ADC input voltage (VADC) near the common-mode voltage (VCM). Experimental results demonstrate that the interface remains stable even when the buffer voltage reaches 2.75 V, significantly surpassing the 1.2 V ADC limit. Sensor resistance data, reconstructed by inversely calculating updated circuit parameters, achieved high accuracy with a Mean Absolute Percentage Error (MAPE) of 1.628% and a maximum relative error under 4.8%. Consequently, this study proves that logically extending the physically limited ADC dynamic range enables high-precision gas sensing in diverse environments without requiring high-performance computing devices. This approach provides a cost-effective and robust solution for compact IoT-based gas monitoring systems. Full article
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