2D Materials and Their Applications in Electronic and Optoelectronic Devices, and Sensors

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "E:Engineering and Technology".

Deadline for manuscript submissions: closed (31 May 2021) | Viewed by 7312

Special Issue Editor


E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON, Canada
Interests: 2D material based electronic devices and sensors; Wearables; Semiconductor devices; Bioelectronics; Mobile health care

Special Issue Information

Dear Colleagues,

The separation of a single layer of carbon atoms from graphite, known as graphene, which was achieved for the first time in 2004, was followed by the discovery and study of various two-dimensional (2D) materials. The outstanding electrical, mechanical, optical, and chemical properties of 2D materials owing to their quantum confinement has opened a new exciting chapter in theoretical and experimental studies, which although it is yet in its infancy, resulted in utilizing  2D materials for novel electronics, optoelectronics, bioelectronics, sensing, energy storage, healthcare, and wearable devices applications. The significant effort of a large scientific community interested in 2D materials has brought the first member of the 2D materials family—graphene—to large-scale industrial production in less than 20 years after the first report of its successful separation and primary characterization. Further theoretical and experimental research and study is required for the large-area growth and characterization of other 2D materials as well as for the development of 2D material-based functional devices.

The focus of this Special Issue is the fundamental study and novel applications of 2D materials that may pave the path to the next generation of electronics, optoelectronics, and sensors, as well as the recent advances in the growth and production of 2D materials. 

Scope:

  • Large-area growth and characterization of 2D materials
  • Novel 2D material-based electronics, optoelectronics, sensors, wearables, super capacitors, and energy storage devices
  • Theoretical and fundamental study of 2D materials

Prof. Dr. Shideh Kabiri Ameri
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. Micromachines 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 2600 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.

Published Papers (3 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

12 pages, 3161 KiB  
Article
Switchable and Dual-Tunable Multilayered Terahertz Absorber Based on Patterned Graphene and Vanadium Dioxide
by Hongyao Liu, Panpan Wang, Jiali Wu, Xin Yan, Xueguang Yuan, Yangan Zhang and Xia Zhang
Micromachines 2021, 12(6), 619; https://doi.org/10.3390/mi12060619 - 27 May 2021
Cited by 8 | Viewed by 2275
Abstract
In this paper, a switchable and dual-tunable terahertz absorber based on patterned graphene and vanadium dioxide is proposed and analyzed. By controlling the Fermi level of graphene and the temperature of vanadium dioxide, the device’s function can be switched and its absorbing properties [...] Read more.
In this paper, a switchable and dual-tunable terahertz absorber based on patterned graphene and vanadium dioxide is proposed and analyzed. By controlling the Fermi level of graphene and the temperature of vanadium dioxide, the device’s function can be switched and its absorbing properties can be tuned. When the vanadium dioxide is in an insulator state, the device can be switched from near-total reflection (>97%) to ultra-broadband absorption (4.5–10.61 THz) as the Fermi level of graphene changes from 0 to 0.8 eV. When the vanadium dioxide is changed to a metal state, the device can act as a single-band absorber (when the Fermi level of graphene is 0 eV) and a dual-band absorber with peaks of 4.16 THz and 7.3 THz (when the Fermi level of graphene is 0.8 eV). Additionally, the absorber is polarization-insensitive and can maintain a stable high-absorption performance within a 55° incidence angle. The multilayered structure shows great potential for switchable and tunable high-performance terahertz devices. Full article
Show Figures

Figure 1

9 pages, 1750 KiB  
Article
Transient Study of Femtosecond Laser–Induced Ge2Sb2Te5 Phase Change Film Morphology
by Wenju Zhou, Zifeng Zhang, Qingwei Zhang, Dongfeng Qi, Tianxiang Xu, Shixun Dai and Xiang Shen
Micromachines 2021, 12(6), 616; https://doi.org/10.3390/mi12060616 - 27 May 2021
Cited by 3 | Viewed by 2536
Abstract
Femtosecond laser-induced crystallization and ablation of Ge2Sb2Te5 (GST) phase change film is investigated by reflectivity pump-probing technology. Below the ablation threshold, the face-centered cubic structure (FCC) state in the central area can be formed, and cylindrical rims are [...] Read more.
Femtosecond laser-induced crystallization and ablation of Ge2Sb2Te5 (GST) phase change film is investigated by reflectivity pump-probing technology. Below the ablation threshold, the face-centered cubic structure (FCC) state in the central area can be formed, and cylindrical rims are formed in the peripheral dewetting zone due to the solidification of transported matter. The time of surface temperature dropping to the crystallization point needs about 30 ps for 5.86 mJ/cm2 and 82 ps for 7.04 mJ/cm2, respectively. At higher laser fluence, crystallization GST island structures appear in the central ablation region due to the extremely short heating time (100 ps). Furthermore, crystallization rate is faster than the ablation rate of the GST film, which is caused by different reflectivity. Full article
Show Figures

Figure 1

12 pages, 3580 KiB  
Article
Graphene/Silver Nanowires/Graphene Sandwich Composite for Stretchable Transparent Electrodes and Its Fracture Mechanism
by Chi-Hsien Huang, Hong-Cing Wu, Bo-Feng Chen and Yen-Cheng Li
Micromachines 2021, 12(5), 512; https://doi.org/10.3390/mi12050512 - 02 May 2021
Cited by 5 | Viewed by 2049
Abstract
Polycrystalline graphene grown by chemical vapor deposition (CVD) is characterized by line defects and disruptions at the grain boundaries and nucleation sites. This adversely affects the stretchability and conductivity of graphene, which limits its applications in the field of flexible, stretchable, and transparent [...] Read more.
Polycrystalline graphene grown by chemical vapor deposition (CVD) is characterized by line defects and disruptions at the grain boundaries and nucleation sites. This adversely affects the stretchability and conductivity of graphene, which limits its applications in the field of flexible, stretchable, and transparent electrodes. We demonstrate a composite electrode comprised of a graphene/silver nanowires (AgNWs)/graphene sandwich structure on a polydimethylsiloxane substrate to overcome this limitation. The sandwich structure exhibits high transparency (>90%) and excellent conductivity improvement of the graphene layers. The use of AgNWs significantly suppresses the conductivity loss resulting from stretching. The mechanism of the suppression of the conductivity loss was investigated using scanning electron microscopy, atomic force microscopy, and lateral force microscopy. The results suggest that the high surface friction of the sandwich structure causes a sliding effect between the graphene layers would produce low crack or hole formation to maintain the conductivity. In addition to acting as conductive layers, the top and bottom graphene layers can also protect the AgNWs from oxidation, thereby enabling maintenance of the electrical performance of the electrodes over a prolonged period. We also confirmed the applicability of the sandwich structure electrode to the human body, such as on the wrist, finger, and elbow. Full article
Show Figures

Figure 1

Back to TopTop