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Applied Sciences
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Laser-Induced Graphene and Its Applications in Flexible Electronics
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Laser-Induced Graphene and Its Applications in Flexible Electronics

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: closed (10 August 2023) | Viewed by 7219

Special Issue Editors

Prof. Dr. Yun Chen

E-Mail Website
Guest Editor
State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
Interests: laser-induced graphene; semiconductor etching; microelectronic packaging; flexible electronics
Special Issues, Collections and Topics in MDPI journals
Dr. Huilong Liu

E-Mail Website
Guest Editor
State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment & School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
Interests: nanostructured materials; carbon nanomaterials; laser processing; functional structures; micro-supercapacitors; flexible electrodes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since it was firstly reported in 2014, laser-induced graphene (LIG) has received extensive attention because of its high throughput, direct patterning, and customizable fabrication. It can be processed with a variety of lasers, including infrared and ultraviolet lasers, and using both synthetic materials and natural materials (e.g., organic films, plants, textiles, and papers) as the precursor of graphene.

LIG has successfully shown its potential in the fields of electronics devices which require high flexibility and versatility, including mechanical sensors, temperature and humidity sensors, gas sensors, electrochemical sensors, electrophysiological sensors, Joule heaters, and actuators, supercapacitors, and solid-state triboelectric nanogenerators.

This Special Issue will be dedicated to new perspectives in LIG and its applications on flexible electronics. Subjects that will be discussed in this Special Issue will focus not only on methods and technologies of preparing LIG, and characterization of its properties, but also on its full potential in creating complex structures and devices for practical flexible applications.

Prof. Dr. Yun Chen
Dr. Huilong​ Liu
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. Applied Sciences 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 2400 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

  • laser-induced graphene
  • flexible electronics
  • properties characterization
  • graphene patterning
  • sensors

Published Papers (3 papers)

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Editorial

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5 pages, 210 KiB  
Editorial
Laser-Induced Graphene Film and Its Applications in Flexible Electronics
by Huilong Liu and Yun Chen
Appl. Sci. 2022, 12(21), 11233; https://doi.org/10.3390/app122111233 - 5 Nov 2022
Cited by 4 | Viewed by 2181
Abstract
Laser-induced graphene (LIG) films and their derivatives have been regarded as one of the most outstanding functional flexible electrodes in the past decade, which will transform society and enable new devices and developments. The aim of this Special Issue is to provide a [...] Read more.
Laser-induced graphene (LIG) films and their derivatives have been regarded as one of the most outstanding functional flexible electrodes in the past decade, which will transform society and enable new devices and developments. The aim of this Special Issue is to provide a scientific platform for scholars in the LIG field to present their recent research towards a deeper understanding of forming mechanism, structure/ morphology, properties and behaviors of LIG films. This Special Issue gives readers the possibility to gain new insights into the applications of LIG films in flexible electronics, including mechanical/temperature/gas/electrochemical sensors, micro-supercapacitors, actuators, electrocatalysis, solid-state triboelectric nanogenerators, Joule heater, etc. We believe that the papers published in this Special Issue will provide a useful guidance for the manufacturing of nanostructured LIG electrodes in flexible electronics. Full article
(This article belongs to the Special Issue Laser-Induced Graphene and Its Applications in Flexible Electronics)

Research

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15 pages, 2669 KiB  
Article
Investigating the Device Performance Variation of a Buried Locally Gated Al/Al2O3 Graphene Field-Effect Transistor Process
by Tzu-Jung Huang, Adheesh Ankolekar, Anibal Pacheco-Sanchez and Ivan Puchades
Appl. Sci. 2023, 13(12), 7201; https://doi.org/10.3390/app13127201 - 16 Jun 2023
Cited by 2 | Viewed by 1510
Abstract
In this study, a process is developed for the fabrication of buried top-gated graphene transistors with Al2O3 as a gate dielectric, yielding devices that can be suitable for not only flexible electronics but also laser-induced graphene (LIG)-based technology implementations. A [...] Read more.
In this study, a process is developed for the fabrication of buried top-gated graphene transistors with Al2O3 as a gate dielectric, yielding devices that can be suitable for not only flexible electronics but also laser-induced graphene (LIG)-based technology implementations. A new processing option is presented with the use of tetraethyl-orthosilicate (TEOS) as an etch stop for contact via etching of Al2O3. Buried locally gated Al/Al2O3 graphene field-effect transistors (GFETs) are fabricated with Dirac points as low as 4 V, with a metal-to-graphene contact resistance as low as ∼1.7 kΩ·µm, and an average hole mobility of 457.97 cm2/V·s with a non-uniformity of 93%. Large device variation and non-uniformity in electrical performance are not uncommon for graphene-based devices, as process-induced defects play a major role in such variation. AFM, SEM, Raman spectroscopy, and model fitting indicated that the rough Al/Al2O3 surface was the main factor for the observed device variation. AFM analysis indicated a graphene surface roughness Ra of 16.19 nm on top of the buried Al/Al2O3 gate in contrast to a Ra of 4.06 nm over Al2O3/SiO2. The results presented indicate the need to reduce device variability and non-uniformity by improving transfer methods, as well as the use of smoother surfaces and compatible materials. The presented analyses provide a framework with which other researchers can analyze and correlate device variation and non-uniformities while methods to reduce variability are investigated. Full article
(This article belongs to the Special Issue Laser-Induced Graphene and Its Applications in Flexible Electronics)
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Review

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23 pages, 5540 KiB  
Review
Laser-Induced Graphene for Multifunctional and Intelligent Wearable Systems: For Health Care and Human–Computer Interaction
by Tian-Rui Cui, Ding Li, Thomas Hirtz, Wan-Cheng Shao, Zi-Bo Zhou, Shou-Rui Ji, Xin Li, Jian-Dong Xu, Jin-Ming Jian, Zhi-Kang Chen, Ze-Yi Tang, Zi-Gan Xu, Kai-Yin Liu, Hou-Fang Liu, Yi Yang and Tian-Ling Ren
Appl. Sci. 2023, 13(8), 4688; https://doi.org/10.3390/app13084688 - 7 Apr 2023
Cited by 4 | Viewed by 3009
Abstract
With its excellent electrical and mechanical properties and the rapid development of its device fabrication technologies, laser-induced graphene (LIG) has played an important role in the field of wearable technologies since its discovery in 2014. In recent years, with the relentless development of [...] Read more.
With its excellent electrical and mechanical properties and the rapid development of its device fabrication technologies, laser-induced graphene (LIG) has played an important role in the field of wearable technologies since its discovery in 2014. In recent years, with the relentless development of wearable devices, newly developed LIG-based wearable devices also possess multifunction and intelligence characteristics. This review is aimed toward two of the most important fields related to the development of LIG, namely, health care and human–computer interaction (HCI). We introduce multifunctional and intelligent LIG-based wearable systems for health care and HCI developed over the recent years, sorting out their design ideas, preparation process, performance, and application. Furthermore, we discuss the future development direction of LIG-based wearable systems for health care and HCI. Full article
(This article belongs to the Special Issue Laser-Induced Graphene and Its Applications in Flexible Electronics)
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