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Coatings
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Thin Films for Advance Applications
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Thin Films for Advance Applications

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (31 August 2018) | Viewed by 23435

Special Issue Editors

Prof. Dr. Waseem Haider

E-Mail Website
Guest Editor
School of Engineering and Technology, College of Science and Engineering, Central Michigan University, Mount Pleasant, MI 48859, USA
Interests: Biomaterials; Titanium Oxide Nanoparticles/Nanotubes; Thin Films; Graphene Based Nanocomposites; Magnetic Properties of Iron Oxide; Piezoelectric Materials; Surface Engineering; Photocatalysis; Electrochemistry
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Maria Teresa Vieira

E-Mail Website
Guest Editor
Centre for Mechanical Engineering, Materials and Processes, Department of Mechanical Engineering, University of Coimbra, Rua Luis Reis Santos, Polo II, 3030-788 Coimbra, Portugal
Interests: additive manufacturing; nanomaterials; multimaterials; nanoparticles; micromanufacturing

Special Issue Information

Dear Colleagues,

Thin films is an important field in materials science, electrical engineering, and applied solid-state physics. Advances in thin films during this century have enabled a wide range of technological breakthroughs in the fields of surface engineering, corrosion, energy generation and storage, microelectronics, computer manufacturing, and physical devices.

This Special Issue invites manuscripts on the synthesis, fabrication, processing, characterization, properties, and applications of thin films.

In particular, the topics of interest include, but are not limited to:

  • Synthesis and Fabrication
  • Characterization and Applications
  • Surfaces and Interfaces
  • Nanomechanics of thin films
  • Properties of thin films
  • Thin film devices

Dr. Waseem Haider
Prof. Dr. Maria Teresa Vieira
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.

Published Papers (5 papers)

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Research

10 pages, 6080 KiB  
Article
Corrosion Behavior of Hydrotalcite Film on AZ31 Alloy in Simulated Body Fluid
by Jun Chen, Kai Kang, Yingwei Song, En-Hou Han, Sude Ma and Jinqing Ao
Coatings 2019, 9(2), 113; https://doi.org/10.3390/coatings9020113 - 12 Feb 2019
Cited by 11 | Viewed by 2822
Abstract
The hydrotalcite (HT) film is a promising bioactive coating for magnesium alloys. In the present study, we investigate the corrosion behavior of HT film in the simulated body fluid (SBF), and compare with which in NaCl solution. The HT film can provide a [...] Read more.
The hydrotalcite (HT) film is a promising bioactive coating for magnesium alloys. In the present study, we investigate the corrosion behavior of HT film in the simulated body fluid (SBF), and compare with which in NaCl solution. The HT film can provide a very plummy initial protection to the AZ31 alloy in SBF. The corrosion behavior of the HT film in the two solutions is quite different. When in 0.1 mol·L−1 NaCl solution, the film is dissolved gradually, and filiform corrosion is predominant after 3 days immersion. While in Hank’s solution, the thickness and composition of the film are changed. A corrosion products layer mainly consisted of Mg/Ca–PO43−/HPO42−, and minor of CaCO3 is deposited on the top of HT film, which enhances the barrier effect of the HT film. As a result, except for local pit corrosion at several active places, most of the area of the coated sample still remains integral even after immersion for 15 days. It is demonstrated that the HT film has better corrosion protection effect in SBF than in NaCl solution. Full article
(This article belongs to the Special Issue Thin Films for Advance Applications)
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9 pages, 3635 KiB  
Article
Effects of Island-Coated PVdF-HFP Composite Separator on the Performance of Commercial Lithium-ion Batteries
by Junhua Zhao, Qin Hu, Jun Wang, Pinjie Zhang, Youliang Zhu, Guoqiang Wu, Yanwen Lv, Liang Lv, Yongjin Zhao and Meiting Yang
Coatings 2018, 8(12), 437; https://doi.org/10.3390/coatings8120437 - 28 Nov 2018
Cited by 5 | Viewed by 4760
Abstract
The widespread industrialization of high-energy density commercial lithium-ion batteries has long been challenged by issues of safety and efficiency stemming from uncontrollable lithium dendritic growths. Here, an island-coated composite separator has been fabricated using a pre-swelling process with water-based dispersions to address the [...] Read more.
The widespread industrialization of high-energy density commercial lithium-ion batteries has long been challenged by issues of safety and efficiency stemming from uncontrollable lithium dendritic growths. Here, an island-coated composite separator has been fabricated using a pre-swelling process with water-based dispersions to address the issue of dendrite growth. The pre-swelling of the polymer particle surface balances the contradiction between the high crystallinity and electrolyte compatibility showing high electrolyte wettability and electrolyte uptake ability. Furthermore, the point-to-point surface structure can balance the high interfacial adhesion of electrodes and anti-deformation ability well, which is beneficial for preventing ripple-shaped and pot-shaped deformation, smoothing the solid particle morphology of the electrode and achieving a steady interfacial structure for lithium diffusion in cells. This new strategy constructs a non-continuous novel structure, achieving greatly improved dendrite growth suppressing and cell interface stabilization. This paper has opened up a new method for the development of low cost, simple process and easy industry of the lithium-ion pouch cell with improved quality and efficiency. Full article
(This article belongs to the Special Issue Thin Films for Advance Applications)
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12 pages, 4834 KiB  
Article
Enhanced Transmittance Modulation of SiO2-Doped Crystalline WO3 Films Prepared from a Polyethylene Oxide (PEO) Template
by Guanguang Zhang, Kuankuan Lu, Xiaochen Zhang, Weijian Yuan, Honglong Ning, Ruiqiang Tao, Xianzhe Liu, Rihui Yao and Junbiao Peng
Coatings 2018, 8(7), 228; https://doi.org/10.3390/coatings8070228 - 26 Jun 2018
Cited by 17 | Viewed by 4244
Abstract
Polyethylene oxide (PEO)-modified silicon dioxide (SiO2)-doped crystalline tungsten trioxide (WO3) films for use as electrochromic layers were prepared on indium tin oxide (ITO) glass by the sol–gel spin coating technique. The effects of the PEO template and SiO2 [...] Read more.
Polyethylene oxide (PEO)-modified silicon dioxide (SiO2)-doped crystalline tungsten trioxide (WO3) films for use as electrochromic layers were prepared on indium tin oxide (ITO) glass by the sol–gel spin coating technique. The effects of the PEO template and SiO2 on the electrochromic transmittance modulation ability of crystalline WO3 films were investigated. Fourier transform infrared spectroscopy (FT-IR) spectra analysis indicated that PEO was decomposed after annealing at 500 °C for 3 h. X-ray diffraction (XRD) pattern analysis showed that both SiO2 and PEO helped reduce the crystalline grain size of the WO3 films. Atomic force microscope (AFM) images showed that the combined action of SiO2 and PEO was helpful for achieving high surface roughness and a macroporous structure. An electrochromic test indicated that PEO-modified SiO2-doped crystalline WO3 films intercalated more charges (0.0165 C/cm2) than pure WO3 crystalline films (0.0095 C/cm2). The above effects resulted in a good transmittance modulation ability (63.2% at 628 nm) of PEO-modified SiO2-doped crystalline WO3 films, which was higher than that of pure WO3 crystalline films (9.4% at 628 nm). Full article
(This article belongs to the Special Issue Thin Films for Advance Applications)
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17 pages, 14304 KiB  
Article
Dithienylpyrrole- and Tris[4-(2-thienyl)phenyl]amine-Containing Copolymers as Promising Anodic Layers in High-Contrast Electrochromic Devices
by Tzi-Yi Wu, Yuh-Shan Su and Jui-Cheng Chang
Coatings 2018, 8(5), 164; https://doi.org/10.3390/coatings8050164 - 27 Apr 2018
Cited by 9 | Viewed by 3260
Abstract
Three dithienylpyrrole- and tris[4-(2-thienyl)phenyl]amine-containing copolymers (P(MPS-co-TTPA), P(MPO-co-TTPA), and P(ANIL-co-TTPA)) were deposited on indium tin oxide (ITO) surfaces using electrochemical polymerization. Spectroelectrochemical characterizations of polymer films revealed that P(MPS-co-TTPA) film was light olive green, greyish-green, bluish [...] Read more.
Three dithienylpyrrole- and tris[4-(2-thienyl)phenyl]amine-containing copolymers (P(MPS-co-TTPA), P(MPO-co-TTPA), and P(ANIL-co-TTPA)) were deposited on indium tin oxide (ITO) surfaces using electrochemical polymerization. Spectroelectrochemical characterizations of polymer films revealed that P(MPS-co-TTPA) film was light olive green, greyish-green, bluish grey, and grey in neutral state, intermediate state, oxidized state, and highly oxidized state, respectively, whereas P(MPO-co-TTPA) film was green moss, foliage green, dark greyish-green, and bluish-grey in neutral state, intermediate state, oxidized state, and highly oxidized state, respectively. The ΔTmax of P(MPS-co-TTPA) film at 964 nm, P(MPO-co-TTPA) film at 914 nm, and P(ANIL-co-TTPA) film at 960 nm were 67.2%, 60.7%, and 67.1%, respectively, and the coloration efficiency (η) of P(MPS-co-TTPA) film at 964 nm, P(MPO-co-TTPA) film at 914 nm, and P(ANIL-co-TTPA) film at 960 nm were calculated to be 260.3, 176.6, and 230.8 cm2 C−1, respectively. Dual type complementary colored electrochromic devices (ECDs) were constructed using P(MPS-co-TTPA), P(MPO-co-TTPA), or P(ANIL-co-TTPA) as anodic copolymer layer and PProDOT-Et2 as cathodic polymer layer. P(MPO-co-TTPA)/PProDOT-Et2 ECD revealed high ΔT (55.1%) and high η (766.5 cm2 C−1) at 580 nm. Moreover, P(MPS-co-TTPA)/PProDOT-Et2, P(MPO-co-TTPA)/PProDOT-Et2, and P(ANIL-co-TTPA)/PProDOT-Et2 ECDs showed satisfactory long-term cycling stability and optical memory. Full article
(This article belongs to the Special Issue Thin Films for Advance Applications)
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15 pages, 57937 KiB  
Article
Morphological Characteristics of Au Films Deposited on Ti: A Combined SEM-AFM Study
by Francesco Ruffino and Maria Grazia Grimaldi
Coatings 2018, 8(4), 121; https://doi.org/10.3390/coatings8040121 - 26 Mar 2018
Cited by 15 | Viewed by 7718
Abstract
Deposited Au films and coatings are, nowadays, routinely used as active or passive elements in several innovative electronic, optoelectronic, sensing, and energy devices. In these devices, the physical properties of the Au films are strongly determined by the films nanoscale structure. In addition, [...] Read more.
Deposited Au films and coatings are, nowadays, routinely used as active or passive elements in several innovative electronic, optoelectronic, sensing, and energy devices. In these devices, the physical properties of the Au films are strongly determined by the films nanoscale structure. In addition, in these devices, often, a layer of Ti is employed to promote adhesion and, so, influencing the nanoscale structure of the deposited Au film. In this work, we present experimental analysis on the nanoscale cross-section and surface morphology of Au films deposited on Ti. In particular, we sputter-deposited thick (>100 nm thickness) Au films on Ti foils and we used Scanning Electron Microscopy to analyze the films cross-sectional and surface morphology as a function of the Au film thickness and deposition angle. In addition, we analyzed the Au films surface morphology by Atomic Force Microscopy which allowed quantifying the films surface roughness versus the film thickness and deposition angle. The results establish a relation between the Au films cross-sectional and surface morphologies and surface roughness to the film thickness and deposition angle. These results allow setting a general working framework to obtain Au films on Ti with specific morphological and topographic properties for desired applications in which the Ti adhesion layer is needed for Au. Full article
(This article belongs to the Special Issue Thin Films for Advance Applications)
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