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Stress-Strain Analysis and Interface of Thin Solid Films and 2D...
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Stress-Strain Analysis and Interface of Thin Solid Films and 2D Material

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Thin Films".

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 3681

Special Issue Editors

Dr. Sotirios A. Tsirkas

E-Mail Website
Guest Editor
Department of Mechanical Engineering, School of Engineering, University of the Peloponnese, M. Alexandrou 1, Koukouli, GR-26334 Patras, Greece
Interests: materials characterization; interfaces; stress and strain analysis; numerical simulation; thin solid films; manufacturing processes; metal machining
Dr. Spyridon Grammatikopoulos

E-Mail Website
Guest Editor
Department of Mechanical Engineering, School of Engineering, University of the Peloponnese, M. Alexandrou 1, Koukouli, GR-26334 Patras, Greece
Interests: materials; thin films; plasmonics; metal nanoparticles; interfaces; mechanical engineering; 2D materials

Special Issue Information

Dear Colleagues,

Stresses and strain produce a significant impact on the performance properties of thin solid films and 2D materials. The stresses are formed in the process of thin film deposition.  As a result, thin films and internal nanolayer structures are associated with certain problems. The objective of this Special Issue is to summarize the current knowledge in the field of predicting the formation of internal stresses in several-layers-thin solid films or 2D materials, the methods for measuring them, and their influence on the properties of coatings in various fields of application.

This Special Issue’s scope includes: (1) applications and characterizations of thin solid films and 2D materials; (2) stress and strain analysis; (3) experimental or theoretical verification of stress–strain distribution; (4) optimization methods for compensating stress and strain; (5) thin solid film and 2D material deposition processes; (6) fabrication, processing, and properties of devices based upon thin solid films and 2D materials; and (7) mechanical characterization of interface between the coating and the substrate.

We believe that the methods collected in this Special Issue may have further applications in other fields and will advance the current state of research in the area of thin solid films.

We look forward to receiving your contributions.

Dr. Sotirios A. Tsirkas
Dr. Spyridon Grammatikopoulos
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. Coatings 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.

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

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Research

9 pages, 34587 KiB  
Article
Development and Performance Evaluation of Stretchable Silver Pastes for Screen Printing on Thermoplastic Polyurethane Films
by Hyun J. Nam, Yu H. Hwangbo, Su Y. Nam and Hyun M. Nam
Coatings 2023, 13(9), 1499; https://doi.org/10.3390/coatings13091499 - 24 Aug 2023
Cited by 2 | Viewed by 1174
Abstract
Efficient, stretchable wiring electrodes are achieved when the resistance change during expansion and contraction is minimal. Herein, we prepared silver pastes specifically designed for screen printing on thermoplastic polyurethane films; they exhibit minimal resistance changes. The pastes were prepared using silver particles with [...] Read more.
Efficient, stretchable wiring electrodes are achieved when the resistance change during expansion and contraction is minimal. Herein, we prepared silver pastes specifically designed for screen printing on thermoplastic polyurethane films; they exhibit minimal resistance changes. The pastes were prepared using silver particles with sizes of 2 and 7 μm as well as a mixture of 2 and 7 μm silver particles (50:50 wt%). These pastes were analyzed using methods such as rheological measurements, thermogravimetric analysis, printability tests, tensile and torsion tests, and light-emitting diode (LED) tests. The most promising results were obtained when exclusively using 2 μm silver flake particles. The pastes demonstrated a viscosity of 24,880 cps, a thixotropic index value of 2.82, excellent printability, and consistent resistance measurements even after 100% stretch, thus indicating exceptional tensile properties. Moreover, the pastes exhibited substantial stability, with no change in brightness after the attachment of seven LEDs at 20% tension. Full article
(This article belongs to the Special Issue Stress-Strain Analysis and Interface of Thin Solid Films and 2D Material)
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13 pages, 7279 KiB  
Article
Flame-Retardant and Fire-Sensing Packaging Papers Enabled by Diffusion-Driven Self-Assembly of Graphene Oxide and Branched Polyethyleneimine Coatings
by Piao Wen, Jing Ren, Qiang Zhang and Shengjie Ling
Coatings 2023, 13(6), 1047; https://doi.org/10.3390/coatings13061047 - 5 Jun 2023
Cited by 2 | Viewed by 2219
Abstract
Paper has gained popularity as a packaging material due to its reduced environmental impact compared with non-degradable alternatives. However, its flammability poses safety risks, prompting research on enhancing its flame retardancy. This work introduces a diffusion-driven self-assembly strategy (DDSAS) to create a functional [...] Read more.
Paper has gained popularity as a packaging material due to its reduced environmental impact compared with non-degradable alternatives. However, its flammability poses safety risks, prompting research on enhancing its flame retardancy. This work introduces a diffusion-driven self-assembly strategy (DDSAS) to create a functional graphene oxide (GO) coating on various packaging papers. DDSAS involves infiltrating the paper’s cellulose microfiber network with branched polyethyleneimine (b-PEI), which binds firmly to cellulose microfibers. Electrostatic interactions between GO and b-PEI then drive GO assembly into a densely stacked, layered structure on the paper surface. This GO structure provides a physical barrier against flames and generates incombustible gases (CO2, H2O, NO2, and NO) when heated, diluting the surrounding oxygen concentration and acting as a heat insulation layer. These factors increase the flame retardancy of treated papers ten-fold. Additionally, the gradual reduction of GO upon heating forms reduced graphene oxide (rGO) on the paper, significantly increasing its electrical conductivity. As a result, the flame-retardant papers not only prevent the fire from spreading but can also act as fire sensors by triggering an alarm signal at the early stages of contact with fire. In summary, this work offers a rational strategy for designing and manufacturing flame-retardant paper packaging materials. Full article
(This article belongs to the Special Issue Stress-Strain Analysis and Interface of Thin Solid Films and 2D Material)
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