Two-Dimensional Materials for (Opto)-Electronic Applications

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

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 4092

Special Issue Editors


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Guest Editor
Laboratoire de Nanochimie, Institut de Science et d’Ingénierie Supramoléculaires (ISIS), Université de Strasbourg & CNRS, 8 allée Gaspard Monge, CEDEX, 67083 Strasbourg, France
Interests: 2D materials; optoelectronics; molecular functionalization; low-temperature characterizations; semiconductor device physics

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Guest Editor
Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
Interests: 2D materials; optoelectronics; semiconductor device physics

Special Issue Information

Dear Colleagues,

Nano-electronic devices based on 2D materials offer many benefits for the more-than-Moore technology and Internet-of-Things applications. For the scientific community, 2D materials offer a new dreamland for creation and innovation, based on their unique properties, which allow for the improvement in existing (opto)-electronic, flexible, and wearable technology and functionalized multi-responsive devices.

In the last two decades, tremendous research efforts have been devoted to developing novel methods and strategies for the large-scale production of two-dimensional materials, as well as to modelling and fabricating electronic components such as field-effect transistors, sensors, diodes, printed and flexible devices.

Despite worldwide effort, researchers are still confronted with common challenges in material fabrication and device-performance optimization: gaining control over the materials’ fabrication to gain high crystallinity and uniformity, scaling up the material growth and controlling the production costs; optimizing the device structures and on-chip integration.

To address this demand, researchers have been developing an ever-growing interest in 2D semiconductors, leading to their great success.

This Special Issue of Nanomaterials is interested in the preparation, functionalization, and characterization of 2D materials to showcase the most recent advances in the application of 2D semiconductors for (Opto)-Electronic Applications. Original research articles communications, and reviews are welcome. We look forward to receiving your contributions.

Dr. Francesca Urban
Dr. Alessandro Grillo
Guest Editors

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Keywords

  • nanomaterials for opto-electronics
  • nanomaterials for flexible/wearable systems
  • 2D electronics (graphene, TMDs, 2D heterostructures, etc.)
  • nanomaterial-based electronic ink for printing electronic
  • two-dimensional nanomaterial for printing electronic devices
  • characterization and functionalization of 2d materials for multi-responsive devices

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Published Papers (2 papers)

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Research

16 pages, 3402 KiB  
Article
Regeneration and Long-Term Stability of a Low-Power Eco-Friendly Temperature Sensor Based on a Hydrogel Nanocomposite
by Giovanni Landi, Sergio Pagano, Veronica Granata, Guerino Avallone, Luca La Notte, Alessandro Lorenzo Palma, Paolo Sdringola, Giovanni Puglisi and Carlo Barone
Nanomaterials 2024, 14(3), 283; https://doi.org/10.3390/nano14030283 - 30 Jan 2024
Cited by 2 | Viewed by 1544
Abstract
A water-processable and low-cost nanocomposite material, based on gelatin and graphene, has been used to fabricate an environmentally friendly temperature sensor. Demonstrating a temperature-dependent open-circuit voltage between 260 and 310 K, the sensor effectively detects subzero ice formation. Notably, it maintains a constant [...] Read more.
A water-processable and low-cost nanocomposite material, based on gelatin and graphene, has been used to fabricate an environmentally friendly temperature sensor. Demonstrating a temperature-dependent open-circuit voltage between 260 and 310 K, the sensor effectively detects subzero ice formation. Notably, it maintains a constant temperature sensitivity of approximately −19 mV/K over two years, showcasing long-term stability. Experimental evidence demonstrates the efficient regeneration of aged sensors by injecting a few drops of water at a temperature higher than the gelation point of the hydrogel nanocomposite. The real-time monitoring of the electrical characteristics during the hydration reveals the initiation of the regeneration process at the gelation point (~306 K), resulting in a more conductive nanocomposite. These findings, together with a fast response and low power consumption in the range of microwatts, underscore the potential of the eco-friendly sensor for diverse practical applications in temperature monitoring and environmental sensing. Furthermore, the successful regeneration process significantly enhances its sustainability and reusability, making a valuable contribution to environmentally conscious technologies. Full article
(This article belongs to the Special Issue Two-Dimensional Materials for (Opto)-Electronic Applications)
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10 pages, 1979 KiB  
Article
Observation of Multi-Phonon Emission in Monolayer WS2 on Various Substrates
by Eli R. Adler, Thy Doan Mai Le, Ibrahim Boulares, Robert Boyd, Yangchen He, Daniel Rhodes, Edward Van Keuren, Paola Barbara and Sina Najmaei
Nanomaterials 2024, 14(1), 37; https://doi.org/10.3390/nano14010037 - 22 Dec 2023
Viewed by 1932
Abstract
Transition metal dichalcogenides (TMDs) have unique absorption and emission properties that stem from their large excitonic binding energies, reduced-dielectric screening, and strong spin–orbit coupling. However, the role of substrates, phonons, and material defects in the excitonic scattering processes remains elusive. In tungsten-based TMDs, [...] Read more.
Transition metal dichalcogenides (TMDs) have unique absorption and emission properties that stem from their large excitonic binding energies, reduced-dielectric screening, and strong spin–orbit coupling. However, the role of substrates, phonons, and material defects in the excitonic scattering processes remains elusive. In tungsten-based TMDs, it is known that the excitons formed from electrons in the lower-energy conduction bands are dark in nature, whereas low-energy emissions in the photoluminescence spectrum have been linked to the brightening of these transitions, either via defect scattering or via phonon scattering with first-order phonon replicas. Through temperature and incident-power-dependent studies of WS2 grown by CVD or exfoliated from high-purity bulk crystal on different substrates, we demonstrate that the strong exciton–phonon coupling yields brightening of dark transitions up to sixth-order phonon replicas. We discuss the critical role of defects in the brightening pathways of dark excitons and their phonon replicas, and we elucidate that these emissions are intrinsic to the material and independent of substrate, encapsulation, growth method, and transfer approach. Full article
(This article belongs to the Special Issue Two-Dimensional Materials for (Opto)-Electronic Applications)
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