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Special Issue "Advanced Nanocomposites for Sensing Applications"

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A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".

Deadline for manuscript submissions: 31 December 2023 | Viewed by 3356

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Special Issue Editors

Dr. Yao Yao

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Guest Editor

School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Interests: nanomaterials for physical and chemical sensor; piezoelectric devices; MEMS sensor; acoustic sensor
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Xianhe Huang

E-Mail Website
Guest Editor

School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Interests: nanomaterials for piezoelectric devices; acoustic device

Special Issue Information

Dear Colleagues,

In the last two decades, advanced nanocomposites, which are multiphase materials containing two or more distinctly dissimilar components mixed at the nanometric scale, have shown great prospects in various sensing applications, including physical and biochemical sensing. Nanocomposites surprisingly show unique and sometimes enhanced properties (e.g., mechanical, thermal, electrical, optical, etc.) which are not possessed by raw materials. Importantly, these superior properties of advanced nanocomposites can be tuned by varying the components of raw materials and adjusting the synthesis process. Furthermore, the emergence of new nanomaterials with outstanding physical and chemical properties (e.g., carbon nanotube, graphene, black phosphorus, MXene, etc.) has opened up a broader road for the sensing application of advanced nanocomposites.

This Special Issue focuses on the development of advanced nanocomposites for various sensing applications, including (but not limited to) physical sensors (e.g., strain, optical, acceleration, magnetic, etc.) and chemical sensors (e.g., gas, humidity, chemical ion, etc.). Both original research articles and comprehensive review articles are welcome.

Dr. Yao Yao
Prof. Dr. Xianhe Huang
Guest Editors

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Keywords

advanced nanocomposites
physical sensor
chemical sensor
sensitive mechanism of nanocomposites
sensitive electronics

Published Papers (3 papers)

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Research

14 pages, 13828 KiB

Open AccessArticle

Printable and Flexible Humidity Sensor Based on Graphene -Oxide-Supported MoTe₂ Nanosheets for Multifunctional Applications

and

Nanomaterials 2023, 13(8), 1309; https://doi.org/10.3390/nano13081309 - 07 Apr 2023

Cited by 1 | Viewed by 995

Abstract

This study focuses on a novel humidity sensor composed of graphene-oxide (GO)-supported MoTe₂ nanosheets. Conductive Ag electrodes were formed on PET substrates by inkjet printing. A thin film of GO-MoTe₂ was deposited on the Ag electrode used for adsorbing humidity. The experiment’s results demonstrate that MoTe₂ are attached to GO nanosheets uniformly and tightly. The capacitive output of the sensors with various ratios of GO/MoTe₂ has been tested for different levels of humidity (11.3–97.3%RH) at room temperature (25 °C). As a consequence, the obtained hybrid film exhibits superior sensitivity (94.12 pF/%RH). The structural integrity and interaction of different components were discussed to afford the prominent humidity sensitivity performance. Under the bending condition, the output curve of the sensor has no obvious fluctuation. This work provides a low-cost way to build flexible humidity sensors with high-performance in environmental monitoring and healthcare. Full article

(This article belongs to the Special Issue Advanced Nanocomposites for Sensing Applications)

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15 pages, 3871 KiB

Open AccessArticle

Impedance Analysis of Chitin Nanofibers Integrated Bulk Acoustic Wave Humidity Sensor with Asymmetric Electrode Configuration

and

Nanomaterials 2022, 12(17), 3035; https://doi.org/10.3390/nano12173035 - 01 Sep 2022

Cited by 2 | Viewed by 1059

Abstract

This paper fabricated a high-performance chitin nanofibers (ChNFs)-integrated bulk acoustic wave (BAW) humidity sensor with an asymmetric electrode configuration. The ChNFs were successfully prepared from crab shells and used as moisture-sensitive materials to compare the performance of quartz crystal microbalance (QCM) humidity sensors with symmetric and asymmetric electrode structures. The QCM humidity sensor with a smaller electrode area exhibited high sensitivity of 58.84 Hz/%RH, competitive response/recovery time of 30/3.5 s, and low humidity hysteresis of 2.5% RH. However, it is necessary to choose a suitable electrode diameter to balance the stability and sensitivity because the impedance analysis result showed that the reduction of the electrode diameter leads to a sharp decrease in the Q value (stability). Next, the possible humidity-sensitive mechanism of the ChNFs-integrated asymmetric n-m electrode QCM humidity sensor was discussed in detail. Finally, the reasons for the highest sensitivity of the asymmetric n-m electrode QCM humidity sensors having a smaller electrode diameter were analyzed in detail in terms of both mass sensitivity and fringing field effect. This work not only demonstrates that the chitin nanofiber is an excellent potential material for moisture detection, but also provides a new perspective for designing high-performance QCM humidity sensors. Full article

(This article belongs to the Special Issue Advanced Nanocomposites for Sensing Applications)

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8 pages, 688 KiB

Open AccessArticle

Damage Location Monitoring of Graphene/Conducting Polymer Composites Film Based on Self-Sensing

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Nanomaterials 2022, 12(16), 2823; https://doi.org/10.3390/nano12162823 - 17 Aug 2022

Viewed by 857

Abstract

Conductive graphene polymer composites are considered promising functional materials in gas detection, strain detection, metal corrosion prevention, and electromagnetic wave absorption, owing to their good flexibility, lightweight, and adjustable conductivity. The internal defects or external damages of composite films will seriously affect the electrical and functional properties of the materials. Based on the conductive network inside the conductive polymer film and the self-inductance to ultrasonic wave, the defect self-monitoring system of the conductive polymer film is designed and optimized in this work. The self-damage detection system is composed of an electrode array, excitation source, resistance signal acquisition and processing circuit, and damage display. Aiming at different scenarios, the improved interdigital structure transducer for sensors and damage detection device for coating film with a large area are presented and optimized respectively. Meanwhile, the damage location algorithm based on time difference measurement and kernel density estimation algorithm is also optimized. The multiple damage detection is realized by a device with a 4 × 8 electrode array, and the relative error of damage area with 1 mm × 1 mm is less than 5%, and the lower detection limits of damage size are 0.3 mm × 0.3 mm. Full article

(This article belongs to the Special Issue Advanced Nanocomposites for Sensing Applications)

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