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Processes
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Synthesis, Characterization, and Application of Functional Materials
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Synthesis, Characterization, and Application of Functional Materials

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Materials Processes".

Deadline for manuscript submissions: closed (15 October 2021) | Viewed by 10283

Special Issue Editor

Prof. Dr. Yuan-Chang Liang

E-Mail Website
Guest Editor
Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, Taiwan
Interests: epitaxial engineering; LPCVD and PVD crystal growth; chemical route derived nanostructures; functionalized nanoscale and nanostructured materials and surfaces; advanced characterization techniques

Special Issue Information

Dear Colleagues,

Functional materials in forms of thin films, rods, wires, sheets, etc. have opened the door to a revolution in the field of functional devices, making them one of the most studied materials due to their unique intrinsic optical, electrical, mechanical, photoelectric, and chemical/physical sensing features. Several design approaches including microstructural control, doping, composite structures etc., have attracted the attention of scientists in synthesizing functional materials in many fields of application with improved functionality.

This Special Issue on “Synthesis, characterization, and application of functional materials” will attempt to cover the most recent advances in process-dependent properties of functional materials, concerning not only correlations between synthesis and characterization but also process design strategy for their enhanced functional and smart properties to be applied in various scientific fields. This Special Issue welcomes contributions from all researchers working on the synthesis of functional materials and on design strategy for their enhanced characterization and properties.

Prof. Dr. Yuan-Chang Liang
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. Processes 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 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

  • functional materials
  • synthesis
  • property
  • application
  • materials analysis
  • microstructure
  • nanotechnology
  • functional device

Published Papers (4 papers)

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Research

12 pages, 51079 KiB  
Article
Preparation of 2D Periodic Nanopatterned Arrays through Vertical Vibration-Assisted Convective Deposition for Application in Metal-Enhanced Fluorescence
by Kittidhaj Dhanasiwawong, Kheamrutai Thamaphat, Mati Horprathum, Annop Klamchuen, Apiwat Phetsahai and Pichet Limsuwan
Processes 2022, 10(2), 202; https://0-doi-org.brum.beds.ac.uk/10.3390/pr10020202 - 21 Jan 2022
Cited by 1 | Viewed by 2484
Abstract
The performance of a metal-enhanced fluorescence (MEF) substrate is fundamentally based on the orientation of the metal nanostructures on a solid substrate. In particular, two-dimensional (2D) periodic metallic nanostructures exhibit a strong confinement of the electric field between adjacent nanopatterns due to localized [...] Read more.
The performance of a metal-enhanced fluorescence (MEF) substrate is fundamentally based on the orientation of the metal nanostructures on a solid substrate. In particular, two-dimensional (2D) periodic metallic nanostructures exhibit a strong confinement of the electric field between adjacent nanopatterns due to localized surface plasmon resonance (LSPR), leading to stronger fluorescence intensity enhancement. The use of vertical vibration-assisted convective deposition, a novel, simple, and highly cost-effective technique for preparing the 2D periodic nanostructure of colloidal particles with high uniformity, was therefore proposed in this work. The influences of vertical vibration amplitude and frequency on the structure of thin colloidal film, especially its uniformity, monolayer, and hexagonal close-packed (HCP) arrangement, were also investigated. It was found that the vibration amplitude affected film uniformity, whereas the vibration frequency promoted the colloidal particles to align themselves into defect-free HCP nanostructures. Furthermore, the results showed that the self-assembled 2D periodic arrays of monodisperse colloidal particles were employed as an excellent template for a Au thin-film coating in order to fabricate an efficient MEF substrate. The developed MEF substrate provided a strong plasmonic fluorescence enhancement, with a detection limit for rhodamine 6G as low as 10−9 M. This novel approach could be advantageous in further applications in the area of plasmonic sensing platforms. Full article
(This article belongs to the Special Issue Synthesis, Characterization, and Application of Functional Materials)
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16 pages, 3936 KiB  
Article
Microporous Oxide-Based Surface-Enhanced Raman Scattering Film for Quadrillionth Detection of Mercury Ion (II)
by Sripansuang Tangsuwanjinda, Yu-Yu Chen, Ching-Hsiang Lai, Guan-Ting Jhou, Yu-Wei Chiang and Hsin-Ming Cheng
Processes 2021, 9(5), 794; https://0-doi-org.brum.beds.ac.uk/10.3390/pr9050794 - 30 Apr 2021
Cited by 5 | Viewed by 1971
Abstract
A variety of chemical sensing materials and procedures for conveniently detecting mercuric ion (II) (Hg2+) have been extensively explored. The detection challenges for accomplishing a simple, fast, and low investment procedure at the ultrasensitive level are ongoing. Herein we report a [...] Read more.
A variety of chemical sensing materials and procedures for conveniently detecting mercuric ion (II) (Hg2+) have been extensively explored. The detection challenges for accomplishing a simple, fast, and low investment procedure at the ultrasensitive level are ongoing. Herein we report a quadrillionth level for detecting Hg2+ by the surface-enhanced Raman scattering (SERS) technique. There is an interaction of silver nanoparticles decorated on a zinc-oxide tetrapod structure and coated on FTO glass (Ag@ZnO-FTO) with an organic ligand. 4,4′-Dipyridyl (DPy) performed as being chemisorbed by Ag nanoparticles interacting with a pyridine ring to produce plasmonic hot spots for SERS. The morphology of the surface and porous structure of the tetrapod becomes the powerful platform for enhanced SERS performance of DPy detection. In the absence of the augmentative electrolyte, the enhancement factor for DPy is more than 107. The inhibiting of the aggregation between Ag and DPy was present following the appearance of Hg2+, demonstrated by the quenching of the SERS signal from the DPy molecules. The capability to reproduce and the selectivity of the sensing by DPy were both demonstrated. In addition, the applications for detecting Hg2+ in natural water and beverages were successfully detected. These results demonstrated the SERS sensors had the potential for detecting Hg2+ in practical use. Full article
(This article belongs to the Special Issue Synthesis, Characterization, and Application of Functional Materials)
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15 pages, 2656 KiB  
Article
Evaluation of Antifungal Activity by Mixed Oxide Metallic Nanocomposite against Candida spp.
by Ayodeji Precious Ayanwale, Brenda Lizbeth Estrada-Capetillo and Simón Yobanny Reyes-López
Processes 2021, 9(5), 773; https://0-doi-org.brum.beds.ac.uk/10.3390/pr9050773 - 28 Apr 2021
Cited by 10 | Viewed by 1973
Abstract
High doses of antimicrobial agents are a huge threat due to the increasing number of pathogenic organisms that are becoming resistant to antimicrobial agents. This resistance has led to a search for alternatives. Therefore, this study presents the synthesis and characterization of ZrO [...] Read more.
High doses of antimicrobial agents are a huge threat due to the increasing number of pathogenic organisms that are becoming resistant to antimicrobial agents. This resistance has led to a search for alternatives. Therefore, this study presents the synthesis and characterization of ZrO2-Ag2O nanoparticles (NPs) by sol-gel. The NPs were analyzed by dynamic light scattering (DLS), UV-visible (UV-vis), Raman and scanning electron microscopy (SEM). The NPs were later evaluated for their antifungal effects against Candidaalbicans, Candida dubliniensis, Candida glabrata, and Candida tropicalis, using disc diffusion and microdilution methods, followed by the viability study. The DLS showed sizes for ZrO2 76 nm, Ag2O 50 nm, and ZrO2-Ag2O samples between 14 and 42 nm. UV-vis shows an absorption peak at 300 nm for ZrO2 and a broadband for Ag2O NPs. Raman spectra were consistent with factor group analysis predictions. SEM showed spherically shaped NPs. The antifungal activity result suggested that ZrO2-Ag2O NPs were effective against Candida spp. From the viability study, there was no significance difference in viability as a function of time and concentration on human mononuclear cells. This promising result can contribute toward the development of alternative therapies to treat fungal diseases in humans. Full article
(This article belongs to the Special Issue Synthesis, Characterization, and Application of Functional Materials)
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12 pages, 2592 KiB  
Article
In Situ Deposition of Green Silver Nanoparticles on Urinary Catheters under Photo-Irradiation for Antibacterial Properties
by Fueangfahkan Chutrakulwong, Kheamrutai Thamaphat, Sukon Tantipaibulvut and Pichet Limsuwan
Processes 2020, 8(12), 1630; https://0-doi-org.brum.beds.ac.uk/10.3390/pr8121630 - 11 Dec 2020
Cited by 6 | Viewed by 2613
Abstract
Urinary tract infections, especially catheter-associated urinary tract infections (CAUTIs), are the most common type of nosocomial infections. Patients with chronic indwelling urinary catheters have a higher risk of infection due to biofilm formation on the urinary catheter surface. Therefore, in this work, a [...] Read more.
Urinary tract infections, especially catheter-associated urinary tract infections (CAUTIs), are the most common type of nosocomial infections. Patients with chronic indwelling urinary catheters have a higher risk of infection due to biofilm formation on the urinary catheter surface. Therefore, in this work, a novel, cost-effective antimicrobial urinary catheter was developed using green technology. Silver nanoparticles (AgNPs) synthesized from Mon Thong durian rind waste were used as an antimicrobial agent for the prevention of infection. Flavonoids, phenolic compounds, and glucose extracted from durian rind were used as a reducing agent to reduce the Ag+ dissolved in AgNO3 solution to form non-aggregated AgNPs under light irradiation. The AgNPs were simultaneously synthesized and coated on the inner and outer surfaces of silicone indwelling urinary catheters using the dip coating method. The results showed that the antimicrobial urinary catheter fabricated using a 0.3 mM AgNO3 concentration and 48 h coating time gave the highest antibacterial activity. The as-prepared spherical AgNPs with an average diameter of 9.1 ± 0.4 nm formed on catheter surfaces in a monolayer approximately 1.3 µm thick corresponding to a 0.712 mg/cm2 silver content. The AgNP layer was found to damage and almost completely inhibit the growth of Escherichia coli cells with antibacterial activity by 91%, equivalent to the commercial, high-price antimicrobial urinary catheter. The cumulative amount of silver released from the coated catheter through artificial urine over 10 days was about 0.040 µg/mL, which is less than the silver content that causes tissue and organ toxicity at 44 µg/mL. Thus, we concluded that the developed antimicrobial urinary catheter was useful in reducing the risk of infectious complications in patients with indwelling catheters. Full article
(This article belongs to the Special Issue Synthesis, Characterization, and Application of Functional Materials)
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