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Nanomaterials
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Nanogenerators for Energy Harvesting and Sensing
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Nanogenerators for Energy Harvesting and Sensing

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 3635

Special Issue Editors

Dr. Guanlin Liu

E-Mail Website
Guest Editor
Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
Interests: energy harvesting; triboelectric nanogenerator; blue energy; self-powered sensing
Dr. Chaoyu Chen

E-Mail Website
Guest Editor
College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China
Interests: self-powered sensing; smart textiles; nanogenerator; wearable electronics; textile structure materials

Special Issue Information

Dear Colleagues,

Using Maxwell’s displacement current as the driving force to effectively convert mechanical/thermal energy into electric power, nanogenerators (NGs) are now flourishing. In addition to targeting self-powered sensor needs at a large scope, an area of nanoenergy sensors has also been developed, aiming at using nanotechnology to harvest the energy required for sustainable, independent, and maintenance-free operation of micro/nanosystems and mobile/portable electronics. Based on three effects, including piezoelectricity, triboelectricity, and pyroelectricity, NGs have broad applications in energy science, environmental protection, wearable electronics, self-powered sensors, medical science, robotics, and artificial intelligence.

This Special Issue of Nanomaterials aims to cover the most recent advances in energy harvesting and sensing for the preparation of different kinds of NGs, and related physicochemical effects, such as tribotronics, piezotronics, piezophototronics, pyroelectric, flexotronics, as well as potential applications such as wearable electronics, self-powered sensors, and blue energy.

We welcome full papers, communications, and review articles emphasizing the broad scope of the topic.

Dr. Guanlin Liu
Dr. Chaoyu Chen
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. Nanomaterials 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 2900 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

  • nanogenerator
  • triboelectric
  • tribotronics
  • piezoelectric
  • piezotronics
  • piezophototronics
  • pyroelectric
  • blue energy
  • self-powered sensing

Published Papers (3 papers)

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Research

15 pages, 16440 KiB  
Article
Enhancing the Output Performance of a Triboelectric Nanogenerator Based on Modified Polyimide and Sandwich-Structured Nanocomposite Film
by Jiaheng Zhou, Chunhao Lu, Danquan Lan, Yiyi Zhang, Yiquan Lin, Lingyu Wan, Wenchang Wei, Yuwang Liang, Dongxin Guo, Yansong Liu and Wenyao Yu
Nanomaterials 2023, 13(6), 1056; https://doi.org/10.3390/nano13061056 - 15 Mar 2023
Cited by 7 | Viewed by 1910
Abstract
Recently, scientists have been facing major obstacles in terms of improving the performances of dielectric materials for triboelectric nanogenerators. The triboelectric nanogenerator (TENG) is one of the first green energy technologies that can convert random mechanical kinetic energy into electricity. The surface charge [...] Read more.
Recently, scientists have been facing major obstacles in terms of improving the performances of dielectric materials for triboelectric nanogenerators. The triboelectric nanogenerator (TENG) is one of the first green energy technologies that can convert random mechanical kinetic energy into electricity. The surface charge density of TENGs is a critical factor speeding up their commercialization, so it is important to explore unique methods to increase the surface charge density. The key to obtaining a high-performance TENG is the preparation of dielectric materials with good mechanical properties, thermal stability and output performance. To solve the problem of the low output performance of PI-based triboelectric nanogenerators, we modified PI films by introducing nanomaterials and designed a new type of sandwich-shaped nanocomposite film. Herein, we used polyimide (PI) with ideal mechanical properties, excellent heat resistance and flexibility as the dielectric material, prepared an A-B-A sandwich structure with PI in the outer layer and modified a copper calcium titanate/polyimide (CCTO/PI) storage layer in the middle to improve the output of a TENG electrode. The doping amount of the CCTO was tailored. The results showed that at 8 wt% CCTO content, the electrical output performance was the highest, and the open-circuit voltage of CCTO/PI was 42 V. In the TENG, the open-circuit voltage, short-circuit current and transfer charge of the prepared sandwich-structured film were increased by 607%, 629% and 672% compared to the TENG with the PI thin film, respectively. This study presents a novel strategy of optimizing dielectric materials for triboelectric nano-generators and has great potential for the future development of high output-performance TENGs. Full article
(This article belongs to the Special Issue Nanogenerators for Energy Harvesting and Sensing)
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14 pages, 3568 KiB  
Article
Stretchable Woven Fabric-Based Triboelectric Nanogenerator for Energy Harvesting and Self-Powered Sensing
by Lijun Chen, Tairan Wang, Yunchu Shen, Fumei Wang and Chaoyu Chen
Nanomaterials 2023, 13(5), 863; https://doi.org/10.3390/nano13050863 - 25 Feb 2023
Cited by 8 | Viewed by 1919
Abstract
With the triboelectric nanogenerator developing in recent years, it has gradually become a promising alternative to fossil energy and batteries. Its rapid advancements also promote the combination of triboelectric nanogenerators and textiles. However, the limited stretchability of fabric-based triboelectric nanogenerators hindered their development [...] Read more.
With the triboelectric nanogenerator developing in recent years, it has gradually become a promising alternative to fossil energy and batteries. Its rapid advancements also promote the combination of triboelectric nanogenerators and textiles. However, the limited stretchability of fabric-based triboelectric nanogenerators hindered their development in wearable electronic devices. Here, in combination with the polyamide (PA) conductive yarn, polyester multifilament, and polyurethane yarn, a highly stretchable woven fabric-based triboelectric nanogenerator (SWF-TENG) with the three elementary weaves is developed. Different from the normal woven fabric without elasticity, the loom tension of the elastic warp yarn is much larger than non-elastic warp yarn in the weaving process, which results in the high elasticity of the woven fabric coming from the loom. Based on the unique and creative woven method, SWF-TENGs are qualified with excellent stretchability (up to 300%), flexibility, comfortability, and excellent mechanical stability. It also exhibits good sensitivity and fast responsibility to the external tensile strain, which can be used as a bend–stretch sensor to detect and identify human gait. Its collected power under pressure mode is capable of lighting up 34 light-emitting diodes (LEDs) by only hand-tapping the fabric. SWF-TENG can be mass-manufactured by using the weaving machine, which decreases fabricating costs and accelerates industrialization. Based on these merits, this work provides a promising direction toward stretchable fabric-based TENGs with wide applications in wearable electronics, including energy harvesting and self-powered sensing. Full article
(This article belongs to the Special Issue Nanogenerators for Energy Harvesting and Sensing)
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13 pages, 3159 KiB  
Article
An Internal-Electrostatic-Field-Boosted Self-Powered Ultraviolet Photodetector
by Dingcheng Yuan, Lingyu Wan, Haiming Zhang, Jiang Jiang, Boxun Liu, Yongsheng Li, Zihan Su and Junyi Zhai
Nanomaterials 2022, 12(18), 3200; https://doi.org/10.3390/nano12183200 - 15 Sep 2022
Cited by 4 | Viewed by 1849
Abstract
Self-powered photodetectors are of significance for the development of low-energy-consumption and environment-friendly Internet of Things. The performance of semiconductor-based self-powered photodetectors is limited by the low quality of junctions. Here, a novel strategy was proposed for developing high-performance self-powered photodetectors with boosted electrostatic [...] Read more.
Self-powered photodetectors are of significance for the development of low-energy-consumption and environment-friendly Internet of Things. The performance of semiconductor-based self-powered photodetectors is limited by the low quality of junctions. Here, a novel strategy was proposed for developing high-performance self-powered photodetectors with boosted electrostatic potential. The proposed self-powered ultraviolet (UV) photodetector consisted of an indium tin oxide and titanium dioxide (ITO/TiO2) heterojunction and an electret film (poly tetra fluoroethylene, PTFE). The PTFE layer introduces a built-in electrostatic field to highly enhance the photovoltaic effect, and its high internal resistance greatly reduces the dark current, and thus remarkable performances were achieved. The self-powered UV photodetector with PTFE demonstrated an extremely high on–off ratio of 2.49 × 105, a responsivity of 76.87 mA/W, a response rise time of 7.44 ms, and a decay time of 3.75 ms. Furthermore, the device exhibited exceptional stability from room temperature to 70 °C. Compared with the conventional ITO/TiO2 heterojunction without the PTFE layer, the photoresponse of the detector improved by 442-fold, and the light–dark ratio was increased by 8.40 × 105 times. In addition, the detector is simple, easy to fabricate, and low cost. Therefore, it can be used on a large scale. The electrostatic modulation effect is universal for various types of semiconductor junctions and is expected to inspire more innovative applications in optoelectronic and microelectronic devices. Full article
(This article belongs to the Special Issue Nanogenerators for Energy Harvesting and Sensing)
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