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Applied Sciences
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High Dielectric Constant Nanoparticles
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High Dielectric Constant Nanoparticles

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 (30 June 2020) | Viewed by 25583

Special Issue Editors

Prof. Dr. Hyung-Ho Park

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Guest Editor
Department of Materials Science and Engineering, Yonsei University, Seoul, Korea
Interests: 1. nanoporous aerogels: thermal barrier, filter, soundproofing, adsorber, gas sensor, ILD of ULSI; 2. thin films: ALD, sputtering deposition, TCO, Mott’s for ReRAM, high-K dielectrics; 3. nanomaterials: nanoparticles, nanocomposite, OLED, QLED, high-K dielectrics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jiwan Kim

E-Mail Website
Guest Editor
Advanced Materials Engineering, Kyonggi University, Suwon, Korea
Interests: nanomaterials; nanoparticles; organic/inorganic electroluminescent device
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hong-Sub Lee

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Kangwon National University, Chuncheon 24341, Korea
Interests: ferroelectric tunnel junction; high-K materials; memristor; memtransistor (2D memristor); oxide semiconductor; strongly correlated electron system
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

High dielectric constant nanoparticles are an important emerging technology that allow us to significantly improve performance and functionality of future electronic devices as sensors, electro-optical devices, thermistors and multi-layer ceramic capacitors. Additionally, the importance of the technology related with energy efficiency and saving has been emphasized increasingly. For instance, novel dielectric nanocomposites of ferroelectric polymers and surface-functionalized high-K nanoparticles with comparable dielectric permittivities and homogeneous nanoparticle dispersions have been reported the enhancement of energy density for high density electrical energy storage.

In this special issue, we will cover a wide range of this research topic from the various chemical synthesis and manufacturing techniques of high-K nanoparticles to their chemical/physical/optical properties, characterization methods and applications.

Prof. Hyung-Ho Park
Prof. Jiwan Kim
Prof. Hong-Sub Lee
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.

Keywords

  • High-K
  • Nanoparticles
  • Ferroelectric
  • Nanocomposites
  • Energy storage

Published Papers (3 papers)

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19 pages, 3373 KiB  
Article
Preparation and Characterization of Zinc Oxide Nanoparticles Using Leaf Extract of Sambucus ebulus
by Sanaz Alamdari, Morteza Sasani Ghamsari, Chan Lee, Wooje Han, Hyung-Ho Park, Majid Jafar Tafreshi, Hosein Afarideh and Mohammad Hosein Majles Ara
Appl. Sci. 2020, 10(10), 3620; https://doi.org/10.3390/app10103620 - 23 May 2020
Cited by 226 | Viewed by 18194
Abstract
Plants are one of the best sources to obtain a variety of natural surfactants in the field of green synthesizing material. Sambucus ebulus, which has unique natural properties, has been considered a promising material in traditional Asian medicine. In this context, zinc [...] Read more.
Plants are one of the best sources to obtain a variety of natural surfactants in the field of green synthesizing material. Sambucus ebulus, which has unique natural properties, has been considered a promising material in traditional Asian medicine. In this context, zinc oxide nanoparticles (ZnO NPs) were prepared using S. ebulus leaf extract, and their physicochemical properties were investigated. X-ray diffraction (XRD) results revealed that the prepared ZnO NPs are highly crystalline, having a wurtzite crystal structure. The average crystallite size of prepared NPs was around 17 nm. Green synthesized NPs showed excellent absorption in the UV region as well as strong yellow-orange emission at room temperature. Prepared nanoparticles exhibited good antibacterial activity against various organisms and a passable photocatalytic degradation of methylene blue dye pollutants. The obtained results demonstrated that the biosynthesized ZnO NPs reveal interesting characteristics for various potential applications in the future. Full article
(This article belongs to the Special Issue High Dielectric Constant Nanoparticles)
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6 pages, 2682 KiB  
Article
Correlation between the Morphology of ZnO Layers and the Electroluminescence of Quantum Dot Light-Emitting Diodes
by Seongkeun Oh and Jiwan Kim
Appl. Sci. 2019, 9(21), 4539; https://doi.org/10.3390/app9214539 - 25 Oct 2019
Cited by 8 | Viewed by 2535
Abstract
The present work shows the effect of the ZnO layer morphology on inverted quantum dot light-emitting diodes (QLEDs) using different spin-coating processes. In the inverted structure of ITO/ZnO/QDs/CBP/MoO3/Al, ZnO nanoparticles were used as the electron transport layer. The utilization of a [...] Read more.
The present work shows the effect of the ZnO layer morphology on inverted quantum dot light-emitting diodes (QLEDs) using different spin-coating processes. In the inverted structure of ITO/ZnO/QDs/CBP/MoO3/Al, ZnO nanoparticles were used as the electron transport layer. The utilization of a two-step spin-coating process to deposit a ZnO layer on a patterned ITO glass substrate resulted in an increase in the surface roughness of the ZnO layer and a decrease in the luminance of the QLEDs. However, the current efficiency of the device was enhanced by more than two-fold due to the reduced current density. Optimization of the ZnO spin-coating process can efficiently improve the optical and electrical properties of QLEDs. Full article
(This article belongs to the Special Issue High Dielectric Constant Nanoparticles)
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18 pages, 1764 KiB  
Opinion
High-k Polymer Nanocomposite Materials for Technological Applications
by Ganesh Shimoga and Sang-Youn Kim
Appl. Sci. 2020, 10(12), 4249; https://doi.org/10.3390/app10124249 - 20 Jun 2020
Cited by 14 | Viewed by 4327
Abstract
Understanding the properties of small molecules or monomers is decidedly important. The efforts of synthetic chemists and material engineers must be appreciated because of their knowledge of how utilize the properties of synthetic fragments in constructing long-chain macromolecules. Scientists active in this area [...] Read more.
Understanding the properties of small molecules or monomers is decidedly important. The efforts of synthetic chemists and material engineers must be appreciated because of their knowledge of how utilize the properties of synthetic fragments in constructing long-chain macromolecules. Scientists active in this area of macromolecular science have shared their knowledge of catalysts, monomers and a variety of designed nanoparticles in synthetic techniques that create all sorts of nanocomposite polymer stuffs. Such materials are now an integral part of the contemporary world. Polymer nanocomposites with high dielectric constant (high-k) properties are widely applicable in the technological sectors including gate dielectrics, actuators, infrared detectors, tunable capacitors, electro optic devices, organic field-effect transistors (OFETs), and sensors. In this short colloquy, we provided an overview of a few remarkable high-k polymer nanocomposites of material science interest from recent decades. Full article
(This article belongs to the Special Issue High Dielectric Constant Nanoparticles)
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