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Nanomaterials
Special Issues
Progress in Emerging Nanomaterials Development for Wearable and Flexible Electronics
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Progress in Emerging Nanomaterials Development for Wearable and Flexible Electronics

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

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 4331

Special Issue Editors

Prof. Dr. Jinwei Gao

E-Mail Website
Guest Editor
Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Interests: nano-materials transparent conductive electrodes; water splitting; flexible solar cells; optoelectronic materials and devices
Dr. Zhen Wang

E-Mail Website
Guest Editor
Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Interests: flexible perovskite solar cells; organic solar cells; transparent conductive electrodes
Dr. Chong Liu

E-Mail Website
Guest Editor
Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
Interests: perovskite solar cells and modules; growth dynamic control of thin films; slot-die coating
Dr. Shaohang Wu

E-Mail Website
Guest Editor Assistant
Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
Interests: transparent conductive oxide; perovskite solar cells

Special Issue Information

Dear Colleagues,

Flexible electronics integrate mechanically flexible materials in conventional electronic devices and systems to yield functionalities that cannot be achieved in traditional rigid wafer-based technology: lightweight design, soft mechanics, scalable manufacturing, conformable assembly, and the like. This cross-fertilized research field has undergone fast advances and significant innovations in the past decade due to the great efforts made by multidisciplinary scientists in chemistry, physics, materials science, and biomedical/mechanical/electrical engineering. Recent frontier achievements in active materials, electrodes, interfaces and systems of the flexible electronics have strongly motivated more in-depth study on both fundamental research and technical applications. As this area has expanded explosively with high degrees of freedom for ad hoc functional applications, we believe the flexible electronics will continue to have considerable impacts on human daily life, with implications for future wearable electronics, display, information security, bio-integrated systems, energy storage and harvesting, healthcare monitoring, and so on.

In the context of the recent progress in this explorative area, this Special Issue of Nanomaterials on the topic of “Flexible Electronics” aims to bring together contributions from distinguished experts and young researchers, who will share their own insights and contributions in this rapidly growing field. The area of flexible electronics is now open for valuable insights and discoveries, especially in appropriated materials selection, novel electronic architecture design, and advanced manufacturing and integration strategies. We believe that this Special Issue will bring knowledge and inspiration to readers that will further benefit the research community and ultimately provide innovations for future technology advances.

Prof. Dr. Jinwei Gao
Dr. Zhen Wang
Dr. Chong Liu
Guest Editors

Dr. Shaohang Wu
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 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

  • conformal mechanics
  • nanomaterials
  • flexible electrodes
  • sensors
  • healthcare
  • structural design
  • manufacturing technology
  • electronic devices
  • integrated devices

Published Papers (3 papers)

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Research

23 pages, 6624 KiB  
Article
Amphiphilic Silver Nanoparticles for Inkjet-Printable Conductive Inks
by Irena Ivanišević, Marin Kovačić, Marko Zubak, Antonia Ressler, Sara Krivačić, Zvonimir Katančić, Iva Gudan Pavlović and Petar Kassal
Nanomaterials 2022, 12(23), 4252; https://doi.org/10.3390/nano12234252 - 29 Nov 2022
Cited by 4 | Viewed by 1678
Abstract
The large-scale manufacturing of flexible electronics is nowadays based on inkjet printing technology using specially formulated conductive inks, but achieving adequate wetting of different surfaces remains a challenge. In this work, the development of a silver nanoparticle-based functional ink for printing on flexible [...] Read more.
The large-scale manufacturing of flexible electronics is nowadays based on inkjet printing technology using specially formulated conductive inks, but achieving adequate wetting of different surfaces remains a challenge. In this work, the development of a silver nanoparticle-based functional ink for printing on flexible paper and plastic substrates is demonstrated. Amphiphilic silver nanoparticles with narrow particle size distribution and good dispersibility were prepared via a two-step wet chemical synthesis procedure. First, silver nanoparticles capped with poly(acrylic acid) were prepared, followed by an amidation reaction with 3-morpholynopropylamine (MPA) to increase their lipophilicity. Density functional theory (DFT) calculations were performed to study the interactions between the particles and the dispersion medium in detail. The amphiphilic nanoparticles were dispersed in solvents of different polarity and their physicochemical and rheological properties were determined. A stable ink containing 10 wt% amphiphilic silver nanoparticles was formulated and inkjet-printed on different surfaces, followed by intense pulsed light (IPL) sintering. Low sheet resistances of 3.85 Ω sq–1, 0.57 Ω sq–1 and 19.7 Ω sq–1 were obtained for the paper, coated poly(ethylene terephthalate) (PET) and uncoated polyimide (PI) flexible substrates, respectively. Application of the nanoparticle ink for printed electronics was demonstrated via a simple flexible LED circuit. Full article
(This article belongs to the Special Issue Progress in Emerging Nanomaterials Development for Wearable and Flexible Electronics)
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14 pages, 4403 KiB  
Article
Screen Printing of Surface-Modified Barium Titanate/Polyvinylidene Fluoride Nanocomposites for High-Performance Flexible Piezoelectric Nanogenerators
by Hai Li and Sooman Lim
Nanomaterials 2022, 12(17), 2910; https://doi.org/10.3390/nano12172910 - 24 Aug 2022
Cited by 13 | Viewed by 1851
Abstract
Piezoelectric energy harvesters are appealing for the improvement of wearable electronics, owing to their excellent mechanical and electrical properties. Herein, screen-printed piezoelectric nanogenerators (PENGs) are developed from triethoxy(octyl)silane-coated barium titanate/polyvinylidene fluoride (TOS-BTO/PVDF) nanocomposites with excellent performance based on the important link between material, [...] Read more.
Piezoelectric energy harvesters are appealing for the improvement of wearable electronics, owing to their excellent mechanical and electrical properties. Herein, screen-printed piezoelectric nanogenerators (PENGs) are developed from triethoxy(octyl)silane-coated barium titanate/polyvinylidene fluoride (TOS-BTO/PVDF) nanocomposites with excellent performance based on the important link between material, structure, and performance. In order to minimize the effect of nanofiller agglomeration, TOS-coated BTO nanoparticles are anchored onto PVDF. Thus, composites with well-distributed TOS-BTO nanoparticles exhibit fewer defects, resulting in reduced charge annihilation during charge transfer from inorganic nanoparticles to the polymer. Consequently, the screen-printed TOS-BTO/PVDF PENG exhibits a significantly enhanced output voltage of 20 V, even after 7500 cycles, and a higher power density of 15.6 μW cm−2, which is 200 and 150% higher than those of pristine BTO/PVDF PENGs, respectively. The increased performance of TOS-BTO/PVDF PENGs is due to the enhanced compatibility between nanofillers and polymers and the resulting improvement in dielectric response. Furthermore, as-printed devices could actively adapt to human movements and displayed excellent detection capability. The screen-printed process offers excellent potential for developing flexible and high-performance piezoelectric devices in a cost-effective and sustainable way. Full article
(This article belongs to the Special Issue Progress in Emerging Nanomaterials Development for Wearable and Flexible Electronics)
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12 pages, 4415 KiB  
Article
High-Stability Silver Nanowire–Al2O3 Composite Flexible Transparent Electrodes Prepared by Electrodeposition
by Honglong Ning, Junlong Chen, Zhihang Li, Zhuohui Xu, Rihui Yao, Hongfu Liang, Taijiang Liu, Guoping Su, Dongxiang Luo and Junbiao Peng
Nanomaterials 2021, 11(11), 3047; https://doi.org/10.3390/nano11113047 - 12 Nov 2021
Cited by 3 | Viewed by 1802
Abstract
Silver nanowire (AgNW) conductive film fabricated by solution processing was investigated as an alternative to indium tin oxide (ITO) in flexible transparent electrodes. In this paper, we studied a facile and effective method by electrodepositing Al2O3 on the surface of [...] Read more.
Silver nanowire (AgNW) conductive film fabricated by solution processing was investigated as an alternative to indium tin oxide (ITO) in flexible transparent electrodes. In this paper, we studied a facile and effective method by electrodepositing Al2O3 on the surface of AgNWs. As a result, flexible transparent electrodes with improved stability could be obtained by electrodepositing Al2O3. It was found that, as the annealing temperature rises, the Al2O3 coating layer can be transformed from Al2O3·H2O into a denser amorphous state at 150 °C. By studying the increase of electrodeposition temperature, it was observed that the transmittance of the AgNW–Al2O3 composite films first rose to the maximum at 70 °C and then decreased. With the increase of the electrodeposition time, the figure of merit (FoM) of the composite films increased and reached the maximum when the time was 40 s. Through optimizing the experimental parameters, a high-stability AgNW flexible transparent electrode using polyimide (PI) as a substrate was prepared without sacrificing optical and electrical performance by electrodepositing at −1.1 V and 70 °C for 40 s with 0.1 mol/L Al(NO3)3 as the electrolyte, which can withstand a high temperature of 250 °C or 250,000 bending cycles with a bending radius of 4 mm. Full article
(This article belongs to the Special Issue Progress in Emerging Nanomaterials Development for Wearable and Flexible Electronics)
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