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Nanomaterials
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Futuristic Nanocomposite Coatings
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Futuristic Nanocomposite Coatings

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanocomposite Materials".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 4180

Special Issue Editor

Prof. Dr. Zulfiqar Ahmad Khan

E-Mail Website
Guest Editor
NanoCorr, Energy & Modelling (NCEM) Research Group, Department of Design & Engineering, Bournemouth University, Dorset BH12 5BB, UK
Interests: advanced materials; nanocomposite coatings; complex interacting systems; contact mechanics; corrosion; energy conservation; surface engineering; tribology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Novel and cutting-edge designs and engineering solutions are required to meet the increasing demand for technologically advanced products that have increased durability and reliability can be applied in complex interacting systems. These systems should be capable of operating in harsh conditions, such as extremely high/low temperatures, high operating loads, multi axial loading, corrosive medium, and starved lubrication. Lately, nanocomposite coatings have made significant contributions in terms of enhancing the durability, reliability and service life of components and the energy efficiency of interacting systems. Nanocomposite coatings are relatively new within the context of industrial applications; therefore, their major benefits are yet to be fully realised. The design of nanocomposite coatings has progressed in recent years following the development of more robust, reliable, and cost-effective characteristics. The control and optimisation of properties at the nanoscale enables researchers to deliver the best possible solutions.

This Special Issue welcomes the submission of original research papers, short communications and in-depth reviews that present novel research findings on nanocomposite coatings applied in, but not limited to, the following: tribology, tribocorrosion, thermofluids and low-to-zero-emission energy generation, conversion and storage.

Prof. Dr. Zulfiqar Ahmad Khan
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. Nanomaterials 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 2900 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

  • wear
  • friction
  • tribocorrosion
  • energy
  • experimental techniques
  • numerical modelling
  • simulation

Published Papers (3 papers)

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Research

12 pages, 3671 KiB  
Article
Wetting Properties of Simulated and Commercial Contaminants on High Transmittance Superhydrophobic Coating
by Michele Ferrari and Francesca Cirisano
Nanomaterials 2023, 13(18), 2541; https://doi.org/10.3390/nano13182541 - 11 Sep 2023
Viewed by 812
Abstract
The large and necessary diffusion of huge solar plants in extra urban areas implies the adoption of maintenance strategies especially where human intervention would require high costs and logistic problems. Animal dejections like bird droppings and agricultural sprays are environmental agents able to [...] Read more.
The large and necessary diffusion of huge solar plants in extra urban areas implies the adoption of maintenance strategies especially where human intervention would require high costs and logistic problems. Animal dejections like bird droppings and agricultural sprays are environmental agents able to significantly decrease light absorption and, in some cases, cause serious damage to the electric conversion systems in a photovoltaic panel. In this work, the performance of a superhydrophobic (SH) coating in terms of durable self-cleaning properties and transparency has been studied in the presence of commercial and simulated contaminants on glass reference and solar panel surfaces. Wettability studies have been carried out both in static and dynamic conditions in order to compare the compositional effect of commercial liquids used as fertilizers or pesticides and molecules like pancreatin as model substances simulating bird droppings. From these studies, it can be observed that the superhydrophobic coating, independently from the surface where it is applied, is able to repel water and substances used such as fertilizers or pesticides and substances simulating bird droppings, maintaining its properties and transparency. This kind of approach can provide information to design suitable spray formulations without the above-mentioned drawbacks to be used in natural environment areas and agrosolar plants. Full article
(This article belongs to the Special Issue Futuristic Nanocomposite Coatings)
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15 pages, 3041 KiB  
Article
Bioactivity Enhancement of Plasma-Sprayed Hydroxyapatite Coatings through Non-Contact Corona Electrical Charging
by Pedro R. Prezas, Manuel J. Soares, João P. Borges, Jorge C. Silva, Filipe J. Oliveira and Manuel Pedro F. Graça
Nanomaterials 2023, 13(6), 1058; https://doi.org/10.3390/nano13061058 - 15 Mar 2023
Cited by 5 | Viewed by 1151
Abstract
Atmospheric plasma spray (APS) remains the only certified industrial process to produce hydroxyapatite (Hap) coatings on orthopaedic and dental implants intended for commercialization. Despite the established clinical success of Hap-coated implants, such as hip and knee arthroplasties, a concern is being raised regarding [...] Read more.
Atmospheric plasma spray (APS) remains the only certified industrial process to produce hydroxyapatite (Hap) coatings on orthopaedic and dental implants intended for commercialization. Despite the established clinical success of Hap-coated implants, such as hip and knee arthroplasties, a concern is being raised regarding the failure and revision rates in younger patients, which are increasing rapidly worldwide. The lifetime risk of replacement for patients in the 50–60 age interval is about 35%, which is significantly higher than 5% for patients aged 70 or older. Improved implants targeted at younger patients are a necessity that experts have been alerted to. One approach is to enhance their bioactivity. For this purpose, the method with the most outstanding biological results is the electrical polarization of Hap, which remarkably accelerates implant osteointegration. There is, however, the technical challenge of charging the coatings. Although this is straightforward on bulk samples with planar faces, it is not easy on coatings, and there are several problems regarding the application of electrodes. To the best of our knowledge, this study demonstrates, for the first time, the electrical charging of APS Hap coatings using a non-contact, electrode-free method: corona charging. Bioactivity enhancement is observed, establishing the promising potential of corona charging in orthopedics and dental implantology. It is found that the coatings can store charge at the surface and bulk levels up to high surface potentials (>1000 V). The biological in vitro results show higher Ca2+ and P5+ intakes in charged coatings compared to non-charged coatings. Moreover, a higher osteoblastic cellular proliferation is promoted in the charged coatings, indicating the promising potential of corona-charged coatings when applied in orthopedics and dental implantology. Full article
(This article belongs to the Special Issue Futuristic Nanocomposite Coatings)
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15 pages, 5470 KiB  
Article
Facile Synthesis and X-ray Attenuation Properties of Ultrasmall Platinum Nanoparticles Grafted with Three Types of Hydrophilic Polymers
by Abdullah Khamis Ali Al Saidi, Adibehalsadat Ghazanfari, Shuwen Liu, Tirusew Tegafaw, Mohammad Yaseen Ahmad, Dejun Zhao, Ying Liu, So Hyeon Yang, Dong Wook Hwang, Ji-ung Yang, Ji Ae Park, Jae Chang Jung, Sung-Wook Nam, Yongmin Chang and Gang Ho Lee
Nanomaterials 2023, 13(5), 806; https://doi.org/10.3390/nano13050806 - 22 Feb 2023
Cited by 3 | Viewed by 1715
Abstract
Ultrasmall platinum nanoparticles (Pt-NPs) grafted with three types of hydrophilic and biocompatible polymers, i.e., poly(acrylic acid), poly(acrylic acid-co-maleic acid), and poly(methyl vinyl ether-alt-maleic acid) were synthesized using a one-pot polyol method. Their physicochemical and X-ray attenuation properties were characterized. All polymer-coated Pt-NPs had [...] Read more.
Ultrasmall platinum nanoparticles (Pt-NPs) grafted with three types of hydrophilic and biocompatible polymers, i.e., poly(acrylic acid), poly(acrylic acid-co-maleic acid), and poly(methyl vinyl ether-alt-maleic acid) were synthesized using a one-pot polyol method. Their physicochemical and X-ray attenuation properties were characterized. All polymer-coated Pt-NPs had an average particle diameter (davg) of 2.0 nm. Polymers grafted onto Pt-NP surfaces exhibited excellent colloidal stability (i.e., no precipitation after synthesis for >1.5 years) and low cellular toxicity. The X-ray attenuation power of the polymer-coated Pt-NPs in aqueous media was stronger than that of the commercial iodine contrast agent Ultravist at the same atomic concentration and considerably stronger at the same number density, confirming their potential as computed tomography contrast agents. Full article
(This article belongs to the Special Issue Futuristic Nanocomposite Coatings)
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