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Chemosensors
Special Issues
Gas Detection Sensors for On-Chip Applications
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Gas Detection Sensors for On-Chip Applications

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Applied Chemical Sensors".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 6619

Special Issue Editor

Prof. Dr. Changyu Shen

E-Mail Website
Guest Editor
Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China
Interests: hydrogen detection; biochemical sensors; on-chip sensors

Special Issue Information

Dear Colleagues,

Significant developments have been achieved in the fields of chemosensors, nanosensors, and lab-on-a-chip systems through the utilization of novel functional materials, structures, devices, and systems at the nano- and microscale, providing improved sensing performances. The aim of this Special Issue is to explore recent progress related to these research fields for gas detection and its applications.

This Special Issue aims to publish state-of-the-art original articles and comprehensive reviews covering gas detection sensors for on-chip applications. Contributions may include different aspects in terms of novel design, fabrication, chemistry, analysis, applications perspectives, and so on.

The topics that will be covered include (but are not limited to):

  • Optical fiber sensors;
  • Pressure, temperature, humidity sensors for gas detections;
  • Novel gas sensor lab-on-a-chip devices;
  • Novel nano- and micromaterials for gas detections.

Prof. Dr. Changyu Shen
Guest Editor

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. Chemosensors is an international peer-reviewed open access monthly 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 2700 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

  • fiber optic sensors
  • gas sensors
  • chemical sensor
  • lab-on-a-chip
  • nanosensors

Published Papers (2 papers)

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Research

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14 pages, 4263 KiB  
Article
Highly Sensitive Hydrogen Sensing Based on Tunable Diode Laser Absorption Spectroscopy with a 2.1 μm Diode Laser
by Tiantian Liang, Shunda Qiao, Xiaonan Liu and Yufei Ma
Chemosensors 2022, 10(8), 321; https://doi.org/10.3390/chemosensors10080321 - 11 Aug 2022
Cited by 12 | Viewed by 3201 | Correction
Abstract
As a new form of energy, hydrogen (H2) has clean and green features, and the detection of H2 has been a hot topic in recent years. However, the lack of suitable laser sources and the weak optical absorption of H [...] Read more.
As a new form of energy, hydrogen (H2) has clean and green features, and the detection of H2 has been a hot topic in recent years. However, the lack of suitable laser sources and the weak optical absorption of H2 limit the research concerning its detection. In this study, a continuous-wave distributed feedback (CW-DFB) diode laser was employed for sensing H2. Tunable diode laser absorption spectroscopy (TDLAS) was adopted as the detection technique. The strongest H2 absorption line, located at 4712.90 cm−1 (2121.83 nm, line strength: 3.19 × 10−26 cm−1/cm−2 × molec), was selected. We propose a H2-TDLAS sensor based on the wavelength modulation spectroscopy (WMS) technique and a Herriott multipass gas cell (HMPC) with an optical length of 10.13 m to achieve a sensitive detection. The WMS technique and second harmonic (2f) demodulation technique were utilized to suppress system noise and simplify the data processing. The 2f signal of the H2-TDLAS sensor, with respect to different H2 concentrations, was measured when the laser wavelength modulation depth was at the optimal value of 0.016 cm−1. The system’s signal-to-noise ratio (SNR) and minimum detection limit (MDL) were improved from 248.02 and 0.40% to 509.55 and 0.20%, respectively, by applying Daubechies (DB) wavelet denoising, resulting in 10 vanishing moments. The Allan variance was calculated, and the optimum MDL of 522.02 ppm was obtained when the integration time of the system was 36 s. Full article
(This article belongs to the Special Issue Gas Detection Sensors for On-Chip Applications)
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Review

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32 pages, 11957 KiB  
Review
Review of the Status and Prospects of Fiber Optic Hydrogen Sensing Technology
by Changyu Shen, Zihan Xie, Zhenlin Huang, Sasa Yan, Wenbo Sui, Jun Zhou, Zhaokun Wang, Wei Han and Xianglong Zeng
Chemosensors 2023, 11(9), 473; https://doi.org/10.3390/chemosensors11090473 - 23 Aug 2023
Cited by 4 | Viewed by 2098
Abstract
With the unprecedented development of green and renewable energy sources, the proportion of clean hydrogen (H2) applications grows rapidly. Since H2 has physicochemical properties of being highly permeable and combustible, high-performance H2 sensors to detect and monitor hydrogen concentration [...] Read more.
With the unprecedented development of green and renewable energy sources, the proportion of clean hydrogen (H2) applications grows rapidly. Since H2 has physicochemical properties of being highly permeable and combustible, high-performance H2 sensors to detect and monitor hydrogen concentration are essential. This review discusses a variety of fiber-optic-based H2 sensor technologies since the year 1984, including: interferometer technology, fiber grating technology, surface plasma resonance (SPR) technology, micro lens technology, evanescent field technology, integrated optical waveguide technology, direct transmission/reflection detection technology, etc. These technologies have been evolving from simply pursuing high sensitivity and low detection limits (LDL) to focusing on multiple performance parameters to match various application demands, such as: high temperature resistance, fast response speed, fast recovery speed, large concentration range, low cross sensitivity, excellent long-term stability, etc. On the basis of palladium (Pd)-sensitive material, alloy metals, catalysts, or nanoparticles are proposed to improve the performance of fiber-optic-based H2 sensors, including gold (Au), silver (Ag), platinum (Pt), zinc oxide (ZnO), titanium oxide (TiO2), tungsten oxide (WO3), Mg70Ti30, polydimethylsiloxane (PDMS), graphene oxide (GO), etc. Various microstructure processes of the side and end of optical fiber H2 sensors are also discussed in this review. Full article
(This article belongs to the Special Issue Gas Detection Sensors for On-Chip Applications)
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