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Crystals
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3D Printing/Additive Manufacturing of Alloys, Ceramics and Polymers
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3D Printing/Additive Manufacturing of Alloys, Ceramics and Polymers

A special issue of Crystals (ISSN 2073-4352).

Deadline for manuscript submissions: closed (20 March 2022) | Viewed by 11225

Special Issue Editor

Dr. George Kenanakis

E-Mail Website
Guest Editor
Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, 70013 Heraklion, Greece
Interests: 3D printing; nanocomposites; metamaterials; energy harvesting; photocatalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The aim of this issue is to present the most recent advances in the field of three-dimensional (3D) printing, also known as additive manufacturing (AM), with multifunction properties.

This Special Issue provides an international forum for professionals and academics to exchange novel ideas and disseminate knowledge covering the full range of activities related to the multidisciplinary area of 3D printing.

Topics of interest include but are not limited to novel design for 3D printing; new applications of 3D printing processes; alloy design; 3D printing of polymeric nanostructures and single crystals; etc. Moreover, this Special Issue will cover 3D data acquisition technologies, rapid tooling and manufacturing, customized mechanical, chemical, and electrical properties, quality control and AM standards, case studies, etc., and several novel applications, such as 3D-printed circuits and electronics, 3D-printed flexible electrodes, large-scale 3D photocatalytic/self-cleaning filters and devices, 3D printing for medicine and biomedical engineering, photonic metamaterials and metasurfaces, etc., to name but a few.

The scope of this Special Issue also includes all 3D printing processes for alloys, ceramics, and polymers.

It is our pleasure to invite you to submit review articles, regular research papers, and short communications for this Special Issue on “3D Printing/Additive Manufacturing of Polymeric Nanostructures with Multifunction Properties”.

Dr. George Kenanakis
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. Crystals 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 2100 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

  • three-dimensional (3D) printing
  • fused deposition modeling (FDM)
  • stereolithography (SLA) 3D printing
  • nanomaterials
  • nanostructures
  • mechanical properties
  • defect formation
  • electrical properties

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

Published Papers (4 papers)

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Research

11 pages, 3106 KiB  
Article
Broadband Reflective Liquid Crystal Films Prepared by Rapid Inkjet Printing and Superposition Polymerization
by Wanli He, Daipeng Yao, Shiguang Luo, Ruijuan Xiong and Xiaotao Yuan
Crystals 2022, 12(4), 473; https://doi.org/10.3390/cryst12040473 - 29 Mar 2022
Cited by 7 | Viewed by 2479
Abstract
Inkjet printing is a non-contact, material saving and on-demand material manufacturing technology, which is able to be applied to the fabrication of functional materials with high efficiency. A new method for preparing broadband reflective cholesteric films based on inkjet printing and non-stick technology [...] Read more.
Inkjet printing is a non-contact, material saving and on-demand material manufacturing technology, which is able to be applied to the fabrication of functional materials with high efficiency. A new method for preparing broadband reflective cholesteric films based on inkjet printing and non-stick technology was proposed in this paper. The feasibility of automatic mixing of liquid crystal and doped materials in inkjet printing was studied. The spectral data of samples prepared by manual mixing and automatic mixing by inkjet printing were compared. It was found that the spectral error of the printed film was only less than 0.17 wt%, which reached or even exceeded the effect of manual mixing. The feasibility of preparing liquid crystal films with broadband reflection characteristics by stacking polymerization based on in situ UV polymerization and non-stick technology was verified. By changing the printing amount of chiral doped ink, the bandwidth of PSCLC film can be accurately controlled. This technology is expected to play an important role in scientific research and practical application. Full article
(This article belongs to the Special Issue 3D Printing/Additive Manufacturing of Alloys, Ceramics and Polymers)
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12 pages, 3990 KiB  
Article
A Study on Fabrication Process of Gold Microdisk Arrays by the Direct Imprinting Method Using a PET Film Mold
by Potejana Potejanasak
Crystals 2021, 11(12), 1452; https://doi.org/10.3390/cryst11121452 - 25 Nov 2021
Cited by 3 | Viewed by 2249
Abstract
In this study, an efficient nanofabrication process of metal microdisk arrays using direct imprinting was developed. This process was comprised of three steps; sputter etching on the quartz glass substrate, gold thin film deposition on an etched surface of a substrate, and transfer [...] Read more.
In this study, an efficient nanofabrication process of metal microdisk arrays using direct imprinting was developed. This process was comprised of three steps; sputter etching on the quartz glass substrate, gold thin film deposition on an etched surface of a substrate, and transfer imprinting using a polyethylene terephthalate (PET) film mold on the Au thin film. A new idea to utilize a PET film mold for disk patterning by the nano transfer imprinting was examined. The PET film mold was prepared by thermally embossing the pillar pattern of a master mold on the PET film. The master mold was prepared from a silicon wafer. The PET film mold was used for transfer imprinting on a metal film deposited on a quartz substrate. The experimental results revealed that the PET film mold can effectively form gold micro-disk arrays on the Au film despite the PET film mold being softer than the Au film. This method can control the distribution and orientation of the nano-arrays on the disk. The plasmonic properties of the gold micro-disk arrays are studied and the absorbance spectrum exhibit depends on the distribution and orientation of gold micro-disk patterns. The nano-transfer imprinting technique is useful for fabricating metallic microdisk arrays on substrate as a plasmonic device. Full article
(This article belongs to the Special Issue 3D Printing/Additive Manufacturing of Alloys, Ceramics and Polymers)
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16 pages, 2955 KiB  
Article
3D-Printed Metasurface Units for Potential Energy Harvesting Applications at the 2.4 GHz Frequency Band
by Z. Viskadourakis, E. Tamiolakis, O. Tsilipakos, A. C. Tasolamprou, E. N. Economou and G. Kenanakis
Crystals 2021, 11(9), 1089; https://doi.org/10.3390/cryst11091089 - 7 Sep 2021
Cited by 11 | Viewed by 2894
Abstract
The capability of three-dimensional printed cut-wire metasurfaces to harvest energy in frequencies around 2.4 GHz, is studied in this paper. Cut-wire metasurfaces were constructed using the Fused Filament Fabrication technique. In particular, two metasurfaces, consisting of different materials were produced. The first was [...] Read more.
The capability of three-dimensional printed cut-wire metasurfaces to harvest energy in frequencies around 2.4 GHz, is studied in this paper. Cut-wire metasurfaces were constructed using the Fused Filament Fabrication technique. In particular, two metasurfaces, consisting of different materials were produced. The first was constructed using Polylactic Acid as starting material. Then, the printed metasurface was covered with a thin layer of conductive silver paint, in order to achieve good electrical conductivity. The other metasurface was built using commercially available, conductive Electrifi. Both metasurfaces exhibit good energy harvesting behavior, in the frequency band near 2.4 GHz. Their harvesting efficiency is found to be almost three times lower than that obtained for conventional PCB-printed cut-wire metasurfaces. Nevertheless, all of the experimental results presented here strongly corroborate that three-dimensional-printed metasurfaces can be potentially used to harvest energy in the 2.4 GHz frequency band. Full article
(This article belongs to the Special Issue 3D Printing/Additive Manufacturing of Alloys, Ceramics and Polymers)
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12 pages, 6125 KiB  
Article
Microstructure and Crystallographic Texture of Laser Additive Manufactured Nickel-Based Superalloys with Different Scanning Strategies
by Xingbo Liu, Hui Xiao, Wenjia Xiao and Lijun Song
Crystals 2021, 11(6), 591; https://doi.org/10.3390/cryst11060591 - 24 May 2021
Cited by 14 | Viewed by 2609
Abstract
Control of solidification structure and crystallographic texture during metal additive manufacturing is a challenging work which attracts the increasing interest of researchers. In the present work, two kinds of scanning strategies (i.e., single-directional scanning (SDS) and cross-directional scanning (CDS) were used to control [...] Read more.
Control of solidification structure and crystallographic texture during metal additive manufacturing is a challenging work which attracts the increasing interest of researchers. In the present work, two kinds of scanning strategies (i.e., single-directional scanning (SDS) and cross-directional scanning (CDS) were used to control the solidification structure and crystallographic texture during quasi-continuous-wave laser additive manufacturing (QCW-LAM) of Inconel 718. The results show that the solidification structure and texture are strongly dependent on scanning strategies. The SDS develops a typical fiber texture with unidirectional columnar grains, whereas the CDS develops a more random texture with a mixture of unidirectional and multidirectional grains. In addition, the SDS promotes the continuously epitaxial growth of columnar dendrites and results in the linearly distributed Laves phase particles, while the CDS leads to the alternately distributed Laves phase particles with chain-like morphology and discrete morphology. The changed stacking features of molten-pool boundary and the switched heat flow direction caused by different scanning strategies plays a crucial role on the epitaxial growth of dendrites and the final solidification structure of the fabricated parts. Full article
(This article belongs to the Special Issue 3D Printing/Additive Manufacturing of Alloys, Ceramics and Polymers)
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