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State-of-the-Art Materials Science in Korea
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State-of-the-Art Materials Science in Korea

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Materials Science".

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 7688

Special Issue Editors

Prof. Dr. In-Seop Lee

E-Mail Website
Guest Editor
Institute of Natural Sciences, Yonsei University, Seoul 120-749, Republic of Korea
Interests: 3D printing; biomimetic materials; bio-material Interface
Dr. Young-IL Jeong

E-Mail Website
Guest Editor
Department of Dental Materials, College of Dentistry, Chosun University, Gwangju 61452, Republic of Korea
Interests: nanoparticle-based drug targeting against cancer; nanomedicine-based drug delivery system across blood-brain barrier; nanomedicine for Alzheimer's disease
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue of the International Journal of Molecular Sciences (IJMS) aims to rapidly publish contributions on the synthesis, properties’ characterization and application of all aspects of materials with a focus on biological or molecular research. Topics include, without being limited to:

  • Biomaterials
  • Nanomaterials
  • Structural Materials
  • Functional/Sensor Materials
  • Advanced/Nuclear Materials
  • Polymers/Composites
  • Self-Assembly/Macromolecular Materials
  • Optoelectronic/Magnetic Materials
  • Soft Materials
  • Biological Materials
  • Non-covalent Interactions

Prof. Dr. In-Seop Lee
Dr. Young-IL 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. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. 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

  • biomaterials
  • nanomaterials
  • structural materials
  • functional/sensor materials
  • advanced/nuclear materials
  • polymers/composites
  • self-assembly/macromolecular materials
  • optoelectronic/magnetic materials
  • soft materials
  • biological materials
  • non-covalent interactions

Published Papers (4 papers)

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Research

10 pages, 3605 KiB  
Article
CuO Modified by 7,7,8,8-Tetracyanoquinodimethane and Its Application to CO2 Separation
by Juyeong Lee and Sangwook Kang
Int. J. Mol. Sci. 2022, 23(23), 14583; https://doi.org/10.3390/ijms232314583 - 23 Nov 2022
Cited by 2 | Viewed by 1245
Abstract
7,7,8,8-Tetracyanoquinomethane (TCNQ) was added to polyvinylpyrrolidone (PVP)/CuO composites to modify and prevent agglomeration of the particles, and thus the CuO particles were well dispersed to a small size, thereby increasing CO2 solubility and separation performance. When the separation performance of the PVP/CuO/TCNQ [...] Read more.
7,7,8,8-Tetracyanoquinomethane (TCNQ) was added to polyvinylpyrrolidone (PVP)/CuO composites to modify and prevent agglomeration of the particles, and thus the CuO particles were well dispersed to a small size, thereby increasing CO2 solubility and separation performance. When the separation performance of the PVP/CuO/TCNQ composite membrane was measured for CO2/N2 gases, a CO2 separation of about 174 was measured. This improvement in performance was attributed to the fact that TCNQ was applied to PVP and CuO to prevent agglomeration between particles with surface modification. Due to TCNQ, CuO could be dispersed to a small size in PVP; the bonds between chains in PVP weakened; the interaction between molecules weakened; and the free volume increased, as confirmed by FT-IR, TGA, and UV–Vis spectroscopy. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in Korea)
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14 pages, 2788 KiB  
Article
Sn(IV)-Porphyrin-Based Nanostructures Featuring Pd(II)-Mediated Supramolecular Arrays and Their Photocatalytic Degradation of Acid Orange 7 Dye
by Nirmal Kumar Shee and Hee-Joon Kim
Int. J. Mol. Sci. 2022, 23(22), 13702; https://doi.org/10.3390/ijms232213702 - 8 Nov 2022
Cited by 14 | Viewed by 1921
Abstract
Two robust Sn(IV)-porphyrin-based supramolecular arrays (1 and 2) were synthesized via the reaction of trans-Pd(PhCN)2Cl2 with two precursor building blocks (SnP1 and SnP2). The structural patterns in these architectures vary from 2D to [...] Read more.
Two robust Sn(IV)-porphyrin-based supramolecular arrays (1 and 2) were synthesized via the reaction of trans-Pd(PhCN)2Cl2 with two precursor building blocks (SnP1 and SnP2). The structural patterns in these architectures vary from 2D to 3D depending on the axial ligation of Sn(IV)-porphyrin units. A discrete 2D tetrameric supramolecule (1) was constructed by coordination of {(trans-dihydroxo)[5,10-bis(4-pyridyl)-15,20-bis(phenyl) porphyrinato]}tin(IV) (SnP1) with trans-PdCl2 units. In contrast, the coordination between the {(trans-diisonicotinato)[5,10-bis(4-pyridyl)-15,20-bis(phenyl)porphyrinato]}tin(IV) (SnP2) and trans-PdCl2 units formed a divergent 3D array (2). Axial ligation of the Sn(IV)-porphyrin building blocks not only alters the supramolecular arrays but also significantly modifies the nanostructures, including porosity, surface area, stability, and morphology. These structural changes consequently affected the photocatalytic degradation efficiency under visible-light irradiation towards acid orange 7 (AO) dye in an aqueous solution. The degradation efficiency of the AO dye in the aqueous solution was observed to be between 86% to 91% within 90 min by these photocatalysts. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in Korea)
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13 pages, 4549 KiB  
Article
Interior Hotspot Engineering in Ag–Au Bimetallic Nanocomposites by In Situ Galvanic Replacement Reaction for Rapid and Sensitive Surface-Enhanced Raman Spectroscopy Detection
by Iris Baffour Ansah, Soo Hyun Lee, ChaeWon Mun, Dong-Ho Kim and Sung-Gyu Park
Int. J. Mol. Sci. 2022, 23(19), 11741; https://doi.org/10.3390/ijms231911741 - 3 Oct 2022
Cited by 6 | Viewed by 1541
Abstract
Engineering of interior hotspots provides a paradigm shift from traditional surface-enhanced Raman spectroscopy (SERS), in which the detection sensitivity depends on the positioning of adsorbed molecules. In the present work, we developed an Ag–Au bimetallic nanocomposite (SGBMNC) SERS platform with interior hotspots through [...] Read more.
Engineering of interior hotspots provides a paradigm shift from traditional surface-enhanced Raman spectroscopy (SERS), in which the detection sensitivity depends on the positioning of adsorbed molecules. In the present work, we developed an Ag–Au bimetallic nanocomposite (SGBMNC) SERS platform with interior hotspots through facile chemical syntheses. Ag nanoparticles replaced by Au via the galvanic replacement reaction (GRR) provided hotspot regions inside the SGBMNC that remarkably enhanced the plasmonic activity compared to the conventional SERS platforms without the internal hotspots. The diffusion of analytes into the proposed interior hotspots during the GRR process enabled sensitive detections within 10 s. The SERS behaviors of the SGBMNC platform were investigated using methylene blue (MB) as a Raman probe dye. A quantitative study revealed excellent detection performance, with a limit of detection (LOD) of 42 pM for MB dye and a highly linear correlation between peak intensity and concentration (R2 ≥ 0.91). The SGBMNC platform also enabled the detection of toxic benzyl butyl phthalate with a sufficient LOD of 0.09 ppb (i.e., 280 pM). Therefore, we believe that the proposed methodology can be used for SERS assays of hazardous materials in practical fields. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in Korea)
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20 pages, 3916 KiB  
Article
Biophysical Characterization of LTX-315 Anticancer Peptide Interactions with Model Membrane Platforms: Effect of Membrane Surface Charge
by Dong Jun Koo, Tun Naw Sut, Sue Woon Tan, Bo Kyeong Yoon and Joshua A. Jackman
Int. J. Mol. Sci. 2022, 23(18), 10558; https://doi.org/10.3390/ijms231810558 - 12 Sep 2022
Cited by 6 | Viewed by 2535
Abstract
LTX-315 is a clinical-stage, anticancer peptide therapeutic that disrupts cancer cell membranes. Existing mechanistic knowledge about LTX-315 has been obtained from cell-based biological assays, and there is an outstanding need to directly characterize the corresponding membrane-peptide interactions from a biophysical perspective. Herein, we [...] Read more.
LTX-315 is a clinical-stage, anticancer peptide therapeutic that disrupts cancer cell membranes. Existing mechanistic knowledge about LTX-315 has been obtained from cell-based biological assays, and there is an outstanding need to directly characterize the corresponding membrane-peptide interactions from a biophysical perspective. Herein, we investigated the membrane-disruptive properties of the LTX-315 peptide using three cell-membrane-mimicking membrane platforms on solid supports, namely the supported lipid bilayer, intact vesicle adlayer, and tethered lipid bilayer, in combination with quartz crystal microbalance-dissipation (QCM-D) and electrochemical impedance spectroscopy (EIS) measurements. The results showed that the cationic LTX-315 peptide selectively disrupted negatively charged phospholipid membranes to a greater extent than zwitterionic or positively charged phospholipid membranes, whereby electrostatic interactions were the main factor to influence peptide attachment and membrane curvature was a secondary factor. Of note, the EIS measurements showed that the LTX-315 peptide extensively and irreversibly permeabilized negatively charged, tethered lipid bilayers that contained high phosphatidylserine lipid levels representative of the outer leaflet of cancer cell membranes, while circular dichroism (CD) spectroscopy experiments indicated that the LTX-315 peptide was structureless and the corresponding membrane-disruptive interactions did not involve peptide conformational changes. Dynamic light scattering (DLS) measurements further verified that the LTX-315 peptide selectively caused irreversible disruption of negatively charged lipid vesicles. Together, our findings demonstrate that the LTX-315 peptide preferentially disrupts negatively charged phospholipid membranes in an irreversible manner, which reinforces its potential as an emerging cancer immunotherapy and offers a biophysical framework to guide future peptide engineering efforts. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in Korea)
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