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Micromachines
Special Issues
Selected papers from the ICNNN 2019 and ICAFM 2019
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Selected papers from the ICNNN 2019 and ICAFM 2019

A special issue of Micromachines (ISSN 2072-666X).

Deadline for manuscript submissions: closed (31 December 2019) | Viewed by 10007

Special Issue Editor

Prof. Dr. Hao Gong

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, National University of Singapore, Singapore 117576, Singapore
Interests: nanomaterials and thin films; supercapacitors; solar cells; transparent semiconductors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will publish selected papers from the 8th International Conference on Nanostructures, Nanomaterials and Nanoengineering 2019 (ICNNN 2019, Kyoto, Japan, 11–14 October 2019, http://icnnn.org) and the 4th International Conference on Advanced Functional Materials (ICAFM 2019, Salt Lake City, UT, USA,  2-5 August, 2019, http://icafm.org/). We aim to collect expanded and high-quality conference papers from ICNNN 2019 and ICAFM 2019, which focus on all aspects of micro-/nano-scaled structures, materials, devices, and systems and are related to micro- and nanotechnology, from fundamental research to applications.

Potential topics include, but are not limited to:

  • Different methods for the growth of nanostructures
  • Characterization of nanomaterials
  • Organic, inorganic, and biomedical applications of nanomaterials and devices
  • Different kinds and morphologies of nanostructures: metals and metal oxides of nanoparticle, nanowires and nanorod, carbon nanotube, and graphene
  • Nanostructured thin films and coatings
  • Nanocomposites
  • Semiconductor and functional nanomaterials and devices
  • Nanostructured ceramic
  • Mechanical, thermal, electric, optical, and magnetic properties of nanomaterials
  • Modification of nanomaterials
  • Nanoengineering

Prof. Dr. Hao Gong
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. Micromachines 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 (3 papers)

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Research

14 pages, 2642 KiB  
Article
The Potential of Pandanus amaryllifolius Leaves Extract in Fabrication of Dense and Uniform ZnO Microrods
by Rabiatuladawiyah Md Akhir, Siti Zulaikha Umbaidilah, Nurul Afaah Abdullah, Salman A.H. Alrokayan, Haseeb A. Khan, Tetsuo Soga, M. Rusop and Zuraida Khusaimi
Micromachines 2020, 11(3), 299; https://doi.org/10.3390/mi11030299 - 13 Mar 2020
Cited by 10 | Viewed by 3587
Abstract
Zinc oxide (ZnO) micro and nanorods were successfully prepared using Pandanus amaryllifolius and hexamethylenetetramine (HMTA) separately as stabilizers using the solution immersion method. Two types of ZnO seed layer were prepared using the same pre-cursor with the different stabilizers. The fabricated ZnO microrods [...] Read more.
Zinc oxide (ZnO) micro and nanorods were successfully prepared using Pandanus amaryllifolius and hexamethylenetetramine (HMTA) separately as stabilizers using the solution immersion method. Two types of ZnO seed layer were prepared using the same pre-cursor with the different stabilizers. The fabricated ZnO microrods exhibit absorption at ~375 nm as revealed from the UV–Visible absorption spectrum, and this is comparable with ZnO nanorods synthesized using HMTA. X-ray diffraction (XRD) measurement displayed a sharp peak corresponding to the hexagonal wurtzite structure of ZnO microrods. Field emission scanning electron microscopy (FESEM) of ZnO microrods showed average diameter at approximately 500 nm compared to 70 nm of those synthesized from HMTA. A new finding is the ability of Pandanus amaryllifolius as a green stabilizer to grow a dense ZnO microrod structure with high crystallinity. Results reveal that both samples from different stabilizers during the preparation of the ZnO seed layer greatly improved the morphological and structural properties and optical absorption of ZnO. The main outcomes from this study will benefit optoelectronic application, such as in ultraviolet (UV) sensors. Full article
(This article belongs to the Special Issue Selected papers from the ICNNN 2019 and ICAFM 2019)
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18 pages, 9054 KiB  
Article
The Tool Life and Coating-Substrate Adhesion of AlCrSiN-Coated Carbide Cutting Tools Prepared by LARC with Respect to the Edge Preparation and Surface Finishing
by Tomáš Vopát, Martin Sahul, Marián Haršáni, Ondřej Vortel and Tomáš Zlámal
Micromachines 2020, 11(2), 166; https://doi.org/10.3390/mi11020166 - 5 Feb 2020
Cited by 20 | Viewed by 2919
Abstract
Nanocomposite AlCrSiN hard coatings were deposited on the cemented carbide substrates with a negative substrate bias voltage within the range of −80 to −120 V using the cathodic arc evaporation system. The effect of variation in the bias voltage on the coating-substrate adhesion [...] Read more.
Nanocomposite AlCrSiN hard coatings were deposited on the cemented carbide substrates with a negative substrate bias voltage within the range of −80 to −120 V using the cathodic arc evaporation system. The effect of variation in the bias voltage on the coating-substrate adhesion and nanohardness was investigated. It was clear that if bias voltage increased, nanohardness increased in the range from −80 V to −120 V. The coating deposited at the bias voltage of −120 V had the highest nanohardness (37.7 ± 1.5 GPa). The samples were prepared by brushing and wet microblasting to finish a surface and prepare the required cutting edge radii for the tool life cutting tests and the coating adhesion observation. The indents after the static Mercedes indentation test were studied by scanning the electron microscope to evaluate the coating-substrate adhesion. The longer time of edge preparation with surface finishing led to a slight deterioration in the adhesion strength of the coating to the substrate. The tool wear of cemented carbide turning inserts was studied on the turning centre during the tool life cutting test. The tested workpiece material was austenitic stainless steel. The cemented carbide turning inserts with larger cutting edge radius were worn out faster during the machining. Meanwhile, the tool life increased when the cutting edge radius was smaller. Full article
(This article belongs to the Special Issue Selected papers from the ICNNN 2019 and ICAFM 2019)
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10 pages, 2615 KiB  
Article
Growth of Less than 20 nm SnO Nanowires Using an Anodic Aluminum Oxide Template for Gas Sensing
by Bo-Chi Zheng, Jen-Bin Shi, Hsien-Sheng Lin, Po-Yao Hsu, Hsuan-Wei Lee, Chih-Hsien Lin, Ming-Way Lee and Ming-Cheng Kao
Micromachines 2020, 11(2), 153; https://doi.org/10.3390/mi11020153 - 30 Jan 2020
Cited by 4 | Viewed by 3032
Abstract
Stannous oxide (SnO) nanowires were synthesized by a template and catalyst-free thermal oxidation process. After annealing a Sn nanowires-embedded anodic aluminum oxide (AAO) template in air, we obtained a large amount of SnO nanowires. SnO nanowires were first prepared by electrochemical deposition and [...] Read more.
Stannous oxide (SnO) nanowires were synthesized by a template and catalyst-free thermal oxidation process. After annealing a Sn nanowires-embedded anodic aluminum oxide (AAO) template in air, we obtained a large amount of SnO nanowires. SnO nanowires were first prepared by electrochemical deposition and an oxidization method based on an AAO template. The preparation of SnO nanowires used aluminum sheet (purity 99.999%) and then a two-step anodization procedure to obtain a raw alumina mold. Finally, transparent alumina molds (AAO template) were obtained by reaming, soaking with phosphoric acid for 20 min, and a stripping process. We got a pore size of < 20 nm on the transparent alumina mold. In order to meet electroplating needs, we produced a platinum film on the bottom surface of the AAO template by using a sputtering method as the electrode of electroplating deposition. The structure was characterized by X-ray diffraction (XRD). High resolution transmission electron microscopy (HRTEM) and field emission scanning electron microscopy (FESEM) with X-ray energy dispersive spectrometer (EDS) were used to observe the morphology. The EDS spectrum showed that components of the materials were Sn and O. FE-SEM results showed the synthesized SnO nanowires have an approximate length of ~10–20 μm with a highly aspect ratio of > 500. SnO nanowires with a Sn/O atomic ratio of ~1:1 were observed from EDS. The crystal structure of SnO nanowires showed that all the peaks within the spectrum lead to SnO with a tetragonal structure. This study may lead to the use of the 1D structure nanowires into electronic nanodevices and/or sensors, thus leading to nano-based functional structures. Full article
(This article belongs to the Special Issue Selected papers from the ICNNN 2019 and ICAFM 2019)
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