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Applied Sciences
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Nano Korea 2021
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Nano Korea 2021

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: closed (20 August 2021) | Viewed by 6518

Special Issue Editors

Prof. Dr. Junhong Min

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Guest Editor
School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
Interests: atomic force microscopy; electrical/electrochemical nanobiosensors; optical nanobiosensors; biochips; BioMEMS and BioNEMS; nanobiomaterials for environments; nanotechnology for bio-robotics; nanotechnology for tissue engineering and regenerative medicine; nanomaterials and nanotechnology in drug and gene delivery; nano-toxicology; sample preparation; molecular diagnostic system; bioanalytical engineering
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Dae Joon Kang

E-Mail Website
Guest Editor
Department of Physics, Sungkyunkwan University, Suwon 16419, Republic of Korea
Interests: synthesis of 2D atomic crystals and their device applications; synthesis of metal oxides and their device physics; electrohydrodynamic lithography; atomic layer deposition
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Won Seok Chang

E-Mail Website
Guest Editor
1. Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
2. Department of Nano-Mechatronics, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
Interests: quantum dots; semiconductors; metals; nanolithography; photolithography; nanoimprint; scanning probe lithography; 3D printing; atomic force microscopy; carbon nanotube; flexible device; stretchable device; nanometrology; ultrafast laser processing; laser scanning microscopy; nanomaterial-based flexible device; maskless digital lithography
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Moongyu Jang
*
E-Mail Website
Guest Editor
Department of Materials Engineering & Engineering, Hallym University, Chuncheon 24252, Korea
Interests: semiconductor logic device; memory device; display device; optoelectronic device; energy conversion; 1D nanomaterials; 2D nanomaterials; semiconductors; graphene; thermoelectrics; energy harvesting; nanolithography; photolithography; nanowire FET; electrical/electrochemical nanobiosensors
* Publication Chair
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Wan Soo Yun

E-Mail Website
Guest Editor
Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
Interests: nanobiosensor; nano-analysis; nanomaterials; nanomanufacturing
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jong-Ryul Jeong

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Korea
Interests: nanomagnetic materials; spin caloritronics; plasmonic nanostructures; magnetoplasmonics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will publish selected papers from the 19th International Nanotech Symposium & Nano-Convergence Exhibition (NANO KOREA 2021), 7–9 July 2021, KINTEX, Ilsan, Korea.

In particular, the symposium, which is the largest sympoisum on nanoscale science and technology in Korea, will be a meaningful occasion to confirm major research results and up-to-date research trends, increase the exchange among researchers in relevant fields, and materialize the results of research. The NANO KOREA symposium will cover the following main topics:

  • Nanoelectronics and photonics;
  • Advanced nanomaterials;
  • Nanofabrication and measurement;
  • Nanobiotechnology and nanomedicine;
  • Nanotechnology for energy;
  • Safety, standardization, and regulation in nanotechlogy;
  • Sensors and actuators;
  • Computational nanoscience and technology.

Papers attracting the most interest at the conference, or that provide novel contributions, will be selected for publication in Applied Sciences. These papers will be peer-reviewed for validation of research results, developments, and applications.

You may choose our Joint Special Issue in Micromachines.

Prof. Dr. Junhong Min
Prof. Dr. Dae Joon Kang
Prof. Dr. Won Seok Chang
Prof. Dr. Moongyu Jang
Prof. Dr. Wan Soo Yun
Prof. Dr. Jong-Ryul Jeong
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. Applied Sciences 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 2400 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 (4 papers)

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Research

12 pages, 29364 KiB  
Article
Effect of Magnetic Nanofluids on the Performance of a Fin-Tube Heat Exchanger
by Yun-Seok Choi and Youn-Jea Kim
Appl. Sci. 2021, 11(19), 9261; https://doi.org/10.3390/app11199261 - 06 Oct 2021
Cited by 2 | Viewed by 1584
Abstract
As electrical devices become smaller, it is essential to maintain operating temperature for safety and durability. Therefore, there are efforts to improve heat transfer performance under various conditions, such as using extended surfaces and nanofluids. Among them, cooling methods using ferrofluid are drawing [...] Read more.
As electrical devices become smaller, it is essential to maintain operating temperature for safety and durability. Therefore, there are efforts to improve heat transfer performance under various conditions, such as using extended surfaces and nanofluids. Among them, cooling methods using ferrofluid are drawing the attention of many researchers. This fluid can control the movement of the fluid in magnetic fields. In this study, the heat transfer performance of a fin-tube heat exchanger, using ferrofluid as a coolant, was analyzed when external magnetic fields were applied. Permanent magnets were placed outside the heat exchanger. When the magnetic fields were applied, a change in the thermal boundary layer was observed. It also formed vortexes, which affected the formation of flow patterns. The vortex causes energy exchanges in the flow field, activating thermal diffusion and improving heat transfer. A numerical analysis was used to observe the cooling performance of heat exchangers, as the strength and number of the external magnetic fields were varying. VGs (vortex generators) were also installed to create vortex fields. A convective heat transfer coefficient was calculated to determine the heat transfer rate. In addition, the comparative analysis was performed with graphical results using contours of temperature and velocity. Full article
(This article belongs to the Special Issue Nano Korea 2021)
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11 pages, 3469 KiB  
Article
Localized Surface Plasmon Fields Manipulation on Nanostructures Using Wavelength Shifting
by Hyerin Song, Heesang Ahn, Taeyeon Kim, Jong-ryul Choi and Kyujung Kim
Appl. Sci. 2021, 11(19), 9133; https://doi.org/10.3390/app11199133 - 30 Sep 2021
Cited by 1 | Viewed by 1448
Abstract
Metallic nanowires have been utilized as a platform for propagating surface plasmon (SPs) fields. To be exploited for applications such as plasmonic circuits, manipulation of localized field propagating pattern is also important. In this study, we calculated the field distributions of localized surface [...] Read more.
Metallic nanowires have been utilized as a platform for propagating surface plasmon (SPs) fields. To be exploited for applications such as plasmonic circuits, manipulation of localized field propagating pattern is also important. In this study, we calculated the field distributions of localized surface plasmons (LSPs) on the specifically shaped nanostructures and explored the feasibility of manipulating LSP fields. Specifically, plasmonic fields were calculated at different wavelengths for a nanoscale rod array (I-shaped), an array connected with two nanoscale rods at right angles (T-shaped), and an array with three nanoscale rods at 120° to each other (Y-shaped). Three different types of nanostructures are suggested to manipulate the positions of LSP fields collaborating with adjustment of wavelength, polarization, and incident orientation of light source. The results of this study are important not only for the understanding of the wavelength-dependent surface plasmon field localization mechanism but also for the applicability of swept source-based plasmonic techniques or designing a plasmonic circuit. Full article
(This article belongs to the Special Issue Nano Korea 2021)
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9 pages, 79397 KiB  
Article
Effect of Shot Peening on the Evolution of Scale on T91 Steel Exposed to Steam
by Liming Xu, Yinsheng He, Yeonkwan Kang and Keesam Shin
Appl. Sci. 2021, 11(19), 8831; https://doi.org/10.3390/app11198831 - 23 Sep 2021
Viewed by 1262
Abstract
Shot peening can be an effective solution for the prevention or retardation of scale formation, and subsequent exfoliation, upon exposure of the inner tube to steam in coal-fired power plants. In this study, specimens of T91 tubes were shot peened and then exposed [...] Read more.
Shot peening can be an effective solution for the prevention or retardation of scale formation, and subsequent exfoliation, upon exposure of the inner tube to steam in coal-fired power plants. In this study, specimens of T91 tubes were shot peened and then exposed to 1-bar steam for 100–1000 h at 650 °C, and were then analyzed using Vickers hardness test and microscopic techniques OM, SEM, TEM, etc. The analysis indicates that the oxide scales are typically Fe2O3 on the topmost layer, Fe3O4 below, and a FeCr2O4 spinel on the bottom in both shot peening treated and untreated specimens. However, the oxide scale thicknesses of shot peened specimens are thinner, indicating that shot peened specimens have better oxidation resistance. In addition, numerous defects, such as voids and micro-cracks, were found in the untreated specimens, which are believed to cause exfoliation of the uppermost Fe2O3 layers of the specimens exposed to steam for 800 and 1000 h. By contrast, the shot peened specimens maintained a dense contact oxide scale with fewer defects. Full article
(This article belongs to the Special Issue Nano Korea 2021)
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18 pages, 5055 KiB  
Article
Enhancement of Desulfurization Capacity with Cu-Based Macro-Porous Sorbents for Hydrogen Production by Gasification of Petroleum Cokes
by Dongjoon Kim, Dasol Bae, Yu Jin Kim, Seung Jong Lee, Jin Wook Lee, Yongseung Yun, No-Kuk Park and Minkyu Kim
Appl. Sci. 2021, 11(17), 7775; https://doi.org/10.3390/app11177775 - 24 Aug 2021
Cited by 5 | Viewed by 1574
Abstract
Macro-porous alumina was used as a support for a pellet-type Cu-based desulfurization sorbent in the gas purification process for producing blue hydrogen by the gasification of petroleum coke. The effects of the macro-porous alumina on the pellet-type sorbents in reducing the gas diffusion [...] Read more.
Macro-porous alumina was used as a support for a pellet-type Cu-based desulfurization sorbent in the gas purification process for producing blue hydrogen by the gasification of petroleum coke. The effects of the macro-porous alumina on the pellet-type sorbents in reducing the gas diffusion resistance into the pores were investigated. The results showed that the macro-porous alumina enhances the diffusion resistance, resulting in an improved sulfur capacity of CuO absorbents. Such effects were more significant on the pellet type CuO absorbents than the powder type. In addition, CO production was observed experimentally during the desulfurization reaction of carbonyl sulfide (COS) at low temperatures (~473 K). Density functional theory calculations were also performed to understand the kinetics of desulfurization and CO production. The simulation results predicted that the kinetics of desulfurization is strongly affected by the local surface environment. The CO generated from C–O bond breaking from COS had a lower adsorption energy than the CO2 formation. These results suggest that the Cu-based desulfurization sorbent has potential catalytic activity for producing CO from COS dissociation. Full article
(This article belongs to the Special Issue Nano Korea 2021)
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