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Tan M, Wang F, Yang J, Zhong Z, Chen G, Chen Z. Hydroxyl silicone oil grafting onto a rough thermoplastic polyurethane surface created durable super-hydrophobicity. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024; 35:1359-1378. [PMID: 38490948 DOI: 10.1080/09205063.2024.2329453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 03/06/2024] [Indexed: 03/17/2024]
Abstract
Indwelling medical catheters are frequently utilized in medical procedures, but they are highly susceptible to infection, posing a vital challenge for both health workers and patients. In this study, the superhydrophobic micro-nanostructure surface was constructed on the surface of thermoplastic polyurethane (TPU) membrane using heavy calcium carbonate (CaCO3) template. To decrease the surface free energy, hydroxyl silicone oil was grafted onto the surface, forming a super-hydrophobic surface. The water contact angle (WCA) increased from 91.1° to 143 ± 3° when the concentration of heavy calcium CaCO3 was 20% (weight-to-volume (w/v)). However, the increased WCA was unstable and tended to decrease over time. After grafting hydroxyl silicone oil, the WCA rose to 152.05 ± 1.62° and remained consistently high for a period of 30 min. Attenuated total reflection infrared spectroscopy (ATR-FTIR) analysis revealed a chemical crosslinking between silicone oil and the surface of TPU. Furthermore, Scanning electron microscope (SEM) image showed the presence of numerous nanoparticles on the micro surface. Atomic force microscope (AFM) testing indicated a significant improvement in surface roughness. This method of creating a hydrophobic surface demonstrated several advantages, including resistance to cell, bacterial, protein, and platelet adhesion and good biosecurity. Therefore, it holds promising potential for application in the development of TPU-based medical catheters with antibacterial properties.
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Affiliation(s)
- Miaomiao Tan
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
| | - Fuping Wang
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
| | - Jinlan Yang
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
| | - Zhengpeng Zhong
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
| | - Guobao Chen
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
| | - Zhongmin Chen
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
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Ji MK, Kim H, Jeong G, Kim WJ, Ryu JH, Cho H, Lim HP. Effects of TiO 2 Nanotubes and Reduced Graphene Oxide on Streptococcus mutans and Preosteoblastic Cells at an Early Stage. Int J Mol Sci 2024; 25:1351. [PMID: 38279351 PMCID: PMC10816206 DOI: 10.3390/ijms25021351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/12/2024] [Accepted: 01/17/2024] [Indexed: 01/28/2024] Open
Abstract
The effects of TiO2 nanotube (TNT) and reduced graphene oxide (rGO) deposition onto titanium, which is widely used in dental implants, on Streptococcus mutans (S. mutans) and preosteoblastic cells were evaluated. TNTs were formed through anodic oxidation on pure titanium, and rGO was deposited using an atmospheric plasma generator. The specimens used were divided into a control group of titanium specimens and three experimental groups: Group N (specimens with TNT formation), Group G (rGO-deposited specimens), and Group NG (specimens under rGO deposition after TNT formation). Adhesion of S. mutans to the surface was assessed after 24 h of culture using a crystal violet assay, while adhesion and proliferation of MC3T3-E1 cells, a mouse preosteoblastic cell line, were evaluated after 24 and 72 h through a water-soluble tetrazolium salt assay. TNT formation and rGO deposition on titanium decreased S. mutans adhesion (p < 0.05) and increased MC3T3-E1 cell adhesion and proliferation (p < 0.0083). In Group NG, S. mutans adhesion was the lowest (p < 0.05), while MC3T3-E1 cell proliferation was the highest (p < 0.0083). In this study, TNT formation and rGO deposition on a pure titanium surface inhibited the adhesion of S. mutans at an early stage and increased the initial adhesion and proliferation of preosteoblastic cells.
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Affiliation(s)
- Min-Kyung Ji
- Dental 4D Research Center, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea;
| | - Hyeonji Kim
- Department of Prosthodontics, School of Dentistry, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea;
| | - Geonwoo Jeong
- Department of Materials Science & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea;
| | - Won-Jae Kim
- Department of Oral Physiology, School of Dentistry, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea;
| | - Je-Hwang Ryu
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea;
| | - Hoonsung Cho
- Department of Materials Science & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea;
| | - Hyun-Pil Lim
- Dental 4D Research Center, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea;
- Department of Prosthodontics, School of Dentistry, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea;
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3
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Alam K, Jang W, Jeong G, Ser J, Kang D, Kim TH, Cho H. Synthesis of High-Entropy Alloys with a Tailored Composition and Phase Structure Using a Single Configurable Target. ACS OMEGA 2024; 9:1362-1374. [PMID: 38222601 PMCID: PMC10785334 DOI: 10.1021/acsomega.3c07721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 01/16/2024]
Abstract
Previously, refractory high-entropy alloys (HEAs) with high crystallinity were synthesized using a configurable target without heat treatment. This study builds upon prior investigations to develop nonrefractory elemental HEAs with low crystallinity using a novel target system. Different targets with various elemental compositions, i.e., Co20Cr20Ni20Mn20Mo20 (target 1), Co30Cr15Ni25Mn15Mo15 (target 2), and Co15Cr25Cu20Mn20Ni20 (target 3), are designed to modify the phase structure. The elemental composition is varied to ensure face-centered cubic (FCC) or body-centered cubic (BCC) phase stabilization. In target 1, the FCC and BCC phases coexist, whereas targets 2 and 3 are characterized by a single FCC phase. Thin films based on targets 1 and 2 exhibit crystalline phases followed by annealing, as indicated by X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses. In contrast, target 3 yields crystalline thin films without any heat treatment. The thin-film coatings are classified based on the atomic size difference (δ). The δ value for the target with the elemental composition CoCrMoMnNi is 9.7, i.e., ≥6.6, corresponding to an HEA with an amorphous phase. However, the annealed thin film is considered a multiprincipal elemental alloy. In contrast, δ for the CoCrCuMnNi HEA is 5, i.e., ≤6.6, upon the substitution of Mo with Cu, and a solid solution phase is formed without any heat treatment. Thus, the degree of crystallinity can be controlled through heat treatment and the manipulation of δ in the absence of heat treatment. The XRD results clarify the crystallinity and phase structure, indicating the presence of FCC or a combination of FCC and BCC phases. The outcomes are consistent with those obtained through the analysis of the valence electron concentration based on X-ray photoelectron spectroscopy. Furthermore, a selected area electron diffraction analysis confirms the presence of both amorphous and crystalline structures in the HEA thin films. Additionally, phase evolution and segregation are observed at 500 °C.
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Affiliation(s)
- Khurshed Alam
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
- Department
of Metal Powder, Korea Institute of Materials
Science, 51508 Changwon, South Korea
| | - Woohyung Jang
- Department
of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
| | - Geonwoo Jeong
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jinhui Ser
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
- Gordon
Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States
| | - Doori Kang
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Tae-Hoon Kim
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Hoonsung Cho
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
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Bjelajac A, Phillipe AM, Guillot J, Chemin JB, Choquet P, Bulou S. Iron oxide/graphene oxide nanocomposite synthesis using atmospheric cold plasma. RSC Adv 2024; 14:1750-1756. [PMID: 38192327 PMCID: PMC10772707 DOI: 10.1039/d3ra05560d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 12/28/2023] [Indexed: 01/10/2024] Open
Abstract
Herein, we demonstrate the use of an atmospheric pressure plasma with a Dielectric Barrier Discharge (DBD) for the synthesis of FeOx nanoparticles with a simultaneous formation of graphene oxide domains at low substrate temperature. For that, the interaction of the plasma to control good decomposition of the Fe precursor is essential and this is demonstrated by FTIR analyses. Thanks to a fine tuning of the plasma conditions, a homogeneous spatial distribution around 5 nm nanoparticles (NPs) was obtained, whereas without plasma, in the same configuration of the process, a heterogeneity regarding size and shape for the NPs was obtained. The Raman spectrum of the plasma deposit confirmed the presence of graphene oxide as the characteristic G and D bands were observed with I(D)/I(G) = 0.92. Thanks to optical emission spectroscopy (OES) measurements, it is proposed that the carbon deposition on FeOx nanoparticles is produced on the near plasma post discharge. XPS studies showed that the main contribution of iron was in Fe2+ form, corresponding to the FeO phase. No metallic Fe or carbide were detected. As there are many studies reporting the synergetic effect of FeOx NPs and graphene oxide, we believe that this new one-step simultaneous synthesis method may be of high interest for applications requiring direct deposition on temperature labile substrates such as polymers.
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Affiliation(s)
- Andjelika Bjelajac
- Luxembourg Institute of Science and Technology 28, Avenue des Hauts-Fourneaux L-4365 Esch-sur-Alzette Luxembourg
| | - Adrian-Marie Phillipe
- Luxembourg Institute of Science and Technology 28, Avenue des Hauts-Fourneaux L-4365 Esch-sur-Alzette Luxembourg
| | - Jérôme Guillot
- Luxembourg Institute of Science and Technology 28, Avenue des Hauts-Fourneaux L-4365 Esch-sur-Alzette Luxembourg
| | - Jean-Baptiste Chemin
- Luxembourg Institute of Science and Technology 28, Avenue des Hauts-Fourneaux L-4365 Esch-sur-Alzette Luxembourg
| | - Patrick Choquet
- Luxembourg Institute of Science and Technology 28, Avenue des Hauts-Fourneaux L-4365 Esch-sur-Alzette Luxembourg
| | - Simon Bulou
- Luxembourg Institute of Science and Technology 28, Avenue des Hauts-Fourneaux L-4365 Esch-sur-Alzette Luxembourg
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5
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Kunisaki A, Kodama A, Ishikawa M, Ueda T, Lima MD, Kondo T, Adachi N. Oxidation-treated carbon nanotube yarns accelerate neurite outgrowth and induce axonal regeneration in peripheral nerve defect. Sci Rep 2023; 13:21799. [PMID: 38066058 PMCID: PMC10709329 DOI: 10.1038/s41598-023-48534-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 11/28/2023] [Indexed: 12/18/2023] Open
Abstract
Carbon nanotubes (CNTs) have the potential to promote peripheral nerve regeneration, although with limited capacity and foreign body reaction. This study investigated whether CNTs hydrophilized by oxidation can improve peripheral nerve regeneration and reduce foreign body reactions and inflammation. Three different artificial nerve conduit models were created using CNTs treated with ozone (O group), strong acid (SA group), and untreated (P group). They were implanted into a rat sciatic nerve defect model and evaluated after 8 and 16 weeks. At 16 weeks, the SA group showed significant recovery in functional and electrophysiological evaluations compared with the others. At 8 weeks, histological examination revealed a significant increase in the density of regenerated neurofilament and decreased foreign body giant cells in the SA group compared with the others. Oxidation-treated CNTs improved biocompatibility, induced nerve regeneration, and inhibited foreign-body reactions.
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Affiliation(s)
- Atsushi Kunisaki
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Akira Kodama
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
| | - Masakazu Ishikawa
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takahiro Ueda
- Nano-Science and Technology Center, LINTEC OF AMERICA, INC., Richardson, USA
| | - Marcio D Lima
- Nano-Science and Technology Center, LINTEC OF AMERICA, INC., Richardson, USA
| | - Takeshi Kondo
- Nano-Science and Technology Center, LINTEC OF AMERICA, INC., Richardson, USA
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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6
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Kim J, Han JH, Kim JH. A Study on the O 2 Plasma Etching Method of Spray-Formed SWCNT Films and Their Utilization as Electrodes for Electrochemical Sensors. SENSORS (BASEL, SWITZERLAND) 2023; 23:7812. [PMID: 37765869 PMCID: PMC10537897 DOI: 10.3390/s23187812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/28/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023]
Abstract
In this study, we analyzed the morphological changes and molecular structure changes on the surface of single-walled carbon nanotube (SWCNT) films during oxygen plasma (O2) etching of SWCNT surfaces formed by the spray method and analyzed their potential use as electrochemical electrodes. For this purpose, a SWCNT film was formed on the surface of a glass substrate using a self-made spray device using SWCNT powder prepared with DCB as a solvent, and SEM, AFM, and XPS analyses were performed as the SWCNT film was O2 plasma etched. SEM images and AFM measurements showed that the SWCNT film started etching after about 30 s under 50 W of O2 plasma irradiation and was completely etched after about 300 s. XPS analysis showed that as the O2 plasma etching of the SWCNT film progressed, the sp2 bonds representing the basic components of graphite decreased, the sp3 bonds representing defects increased, and the C-O, C=O, and COO peaks increased simultaneously. This result indicates that the SWCNT film was etched by the O2 plasma along with the oxygen species. In addition, electrochemical methods were used to verify the damage potential of the remaining SWCNTs after O2 plasma etching, including cyclic voltammetry, Randles plots, and EIS measurements. This resulted in a reversible response based on perfect diffusion control in the cyclic voltammetry, and an ideal linear curve in the Randles plot of the peak current versus square root scan rate curve. EIS measurements also confirmed that the charge transfer resistance of the remaining SWCNTs after O2 plasma etching is almost the same as before etching. These results indicate that the remaining SWCNTs after O2 plasma etching do not lose their unique electrochemical properties and can be utilized as electrodes for biosensors and electrochemical sensors. Our experimental results also indicate that the ionic conductivity enhancement by O2 plasma can be achieved additionally.
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Affiliation(s)
- Jinkyeong Kim
- Department of Nanomechatronics Engineering, Pusan University, 2 Busandaehak-ro 63 Beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea
| | - Ji-Hoon Han
- KIURI Center for Hydrogen Based Next Generation Mechanical System, Inha University, Incheon 22212, Republic of Korea
| | - Joon Hyub Kim
- Department of Nanomechatronics Engineering, Pusan University, 2 Busandaehak-ro 63 Beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea
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7
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Alam K, Jang W, Jeong G, Park CK, Lee K, Cho H. Design and Development of High-Entropy Alloys with a Tailored Composition and Phase Structure Based on Thermodynamic Parameters and Film Thickness Using a Novel Combinatorial Target. ACS OMEGA 2023; 8:28333-28343. [PMID: 37576658 PMCID: PMC10413475 DOI: 10.1021/acsomega.3c02222] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 07/12/2023] [Indexed: 08/15/2023]
Abstract
This study presents a novel synthesis route for high-entropy alloys (HEAs) and high-entropy metallic glass (HEMG) using radio frequency (RF) magnetron sputtering and controlling the HEA phase selection according to atomic size difference (δ) and film thickness. The preparation of HEAs using sputtering requires either multitargets or the preparation of a target containing at least five distinct elements. In developing HEA-preparation techniques, the emergence of a novel sputtering target system is promising to prepare a wide range of HEAs. A new HEA-preparation technique is developed to avoid multitargets and configure the target elements with the required components in a single target system. Because of a customizable target facility, initially, a TiZrNbMoTaCr target emerged with an amorphous phase owing to a high δ value of 7.6, which was followed by a solid solution (SS) by lowering the δ value to 5 (≤6.6). Thus, this system was tested for the first time to prepare TiZrNbMoTa HEA and TiZrNbMoTa HEMG via RF magnetron sputtering. Both films were analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy, field emission scanning electron microscopy cross-sectional thickness, and atomic force microscopy (AFM). Furthermore, HEMG showed higher hardness 10.3 (±0.17) GPa, modulus 186 (±7) GPa, elastic deformation (0.055) and plastic deformation (0.032 GPa), smooth surface, lower corrosion current density (Icorr), and robust cell viability compared to CP-Ti and HEA. XRD analysis of the film showed SS with a body-centered cubic (BCC) structure with (110) as the preferred orientation. The valence electron concentration [VEC = 4.8 (<6.87)] also confirmed the BCC structure. Furthermore, the morphology of the thin film was analyzed through AFM, revealing a smooth surface for HEMG. Inclusively, the concept of configurational entropy (ΔSmix) is applied and the crystalline phase is achieved at room temperature, optimizing the processing by avoiding further furnace usage.
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Affiliation(s)
- Khurshed Alam
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
- Powder
Materials Division, Korea Institute of Materials
Science, 51508 Changwon, South Korea
| | - Woohyung Jang
- Department
of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic
of Korea
| | - Geonwoo Jeong
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Chul-Kyu Park
- Gachon
Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Republic of Korea
| | - Kwangmin Lee
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Hoonsung Cho
- School
of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
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Kim D, Alam K, Han MK, Surendran S, Lim J, Young Kim J, Jun Moon D, Jeong G, Gon Kim M, Kwon G, Yang S, Gon Kang T, Kyu Kim J, Yeop Jung S, Cho H, Sim U. Manipulating wettability of catalytic surface for improving ammonia production from electrochemical nitrogen reduction. J Colloid Interface Sci 2023; 633:53-59. [PMID: 36434935 DOI: 10.1016/j.jcis.2022.11.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 11/19/2022]
Abstract
An electrochemical nitrogen reduction reaction (ENRR) is considered a promising alternative for the traditional Haber-Bosch process. In this study, we present a method for improving the ENRR by controlling the wettability of the catalyst surface, suppressing the hydrogen evolution reaction (HER) while facilitating N2 adsorption. Reduced-graphene oxide (rGO) with a hydrophobic surface property and a contact angle (C.A.) of 59° was synthesized through a high-density atmospheric plasma deposition. Two other hydrophilic and superhydrophobic surfaces with a C.A. of 15° and 150° were developed through additional argon plasma and heat treatment of as-deposited rGO, respectively. The ENRR results showed that the ammonia yield and Faradaic efficiency tended to increase with increasing hydrophobicity. Electrochemical measurements reveal that superhydrophobic rGO achieves a higher Faradaic efficiency (5.73 %) at -0.1 V (vs RHE) and a higher NH3 yield (9.77 μg h-1 cm-2) at -0.4 V (vs RHE) in a 0.1 M KOH electrolyte. In addition, the computational fluid dynamics simulation confirmed that the amount of time the N2 gas remains on the surface could increase by improving the hydrophobicity of the catalytic surface. This study inspires the development of the rGO electrocatalyst through surface wettability modification for boosting ammonia electrosynthesis.
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Affiliation(s)
- Dohun Kim
- Department of Materials Science & Engineering, Chonnam National University, Gwangju 61186, South Korea
| | - Khurshed Alam
- Department of Materials Science & Engineering, Chonnam National University, Gwangju 61186, South Korea
| | - Mi-Kyung Han
- Department of Materials Science & Engineering, Chonnam National University, Gwangju 61186, South Korea
| | - Subramani Surendran
- Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), 200 Hyeoksin-ro, Naju, Jeonnam 58330, Rep. of Korea
| | - Jaehyoung Lim
- Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), 200 Hyeoksin-ro, Naju, Jeonnam 58330, Rep. of Korea
| | - Joon Young Kim
- Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), 200 Hyeoksin-ro, Naju, Jeonnam 58330, Rep. of Korea; Research Institute, NEEL Sciences, INC., 58326 Jeollanamdo, South Korea
| | - Dae Jun Moon
- Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), 200 Hyeoksin-ro, Naju, Jeonnam 58330, Rep. of Korea; Research Institute, NEEL Sciences, INC., 58326 Jeollanamdo, South Korea
| | - Geonwoo Jeong
- Department of Materials Science & Engineering, Chonnam National University, Gwangju 61186, South Korea
| | - Myeong Gon Kim
- Department of Materials Science & Engineering, Chonnam National University, Gwangju 61186, South Korea
| | - Gibum Kwon
- Department of Mechanical Engineering, University of Kansas, Lawrence, KS 66045, United States
| | - Sangsun Yang
- Powder and Ceramics Division, Korea Institute of Materials Science, Changwon 51508, South Korea
| | - Tae Gon Kang
- School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang-si, Gyeonggi-do 10540, South Korea
| | - Jung Kyu Kim
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon 16419, Rep. of Korea
| | - Seon Yeop Jung
- Department of Chemical Engineering, Dankook University, Yongin-si, Gyeonggi-do 16890, South Korea.
| | - Hoonsung Cho
- Department of Materials Science & Engineering, Chonnam National University, Gwangju 61186, South Korea.
| | - Uk Sim
- Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), 200 Hyeoksin-ro, Naju, Jeonnam 58330, Rep. of Korea; Research Institute, NEEL Sciences, INC., 58326 Jeollanamdo, South Korea; Center for Energy Storage System, Chonnam National University, Gwangju 61186, South Korea.
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9
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Souza AP, Neves JG, Navarro da Rocha D, Lopes CC, Moraes ÂM, Correr-Sobrinho L, Correr AB. Chitosan/Xanthan/Hydroxyapatite-graphene oxide porous scaffold associated with mesenchymal stem cells for dentin-pulp complex regeneration. J Biomater Appl 2023; 37:1605-1616. [PMID: 36740600 DOI: 10.1177/08853282231155570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The aim of this paper was to synthesize and characterize polymeric scaffolds of Chitosan/Xanthan/Hydroxyapatite-Graphene Oxide nanocomposite associated with mesenchymal stem cells for regenerative dentistry application. The chitosan-xanthan gum (CX) complex was associated with Hydroxyapatite-Graphene Oxide (HA-GO) nanocomposite with different Graphene Oxides (GO) concentration (0.5 wt%; 1.0 wt%; 1.5 wt%). The scaffolds characterizations were performed by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and contact angle. The mechanical properties were assessed by compressive strength. The in vitro bioactivity and the in vitro cytotoxicity test (MTT test) were analyzed as well. The data was submitted to the Normality and Homogeneity tests. In vitro Indirect Cytotoxicity assay data was statistically analyzed by ANOVA two-way, followed by Tukey's test (α = 0.05). Compressive strength and contact angle data were statistically analyzed by one-way ANOVA, followed by Tukey's test (α = 0.05). XRD showed the presence of Hydroxyapatite (HA) peaks in the structures CXHA, CXHAGO 0.5%,1.0% and 1.5%. FT-IR showed amino and carboxylic bands characteristic of CX. Raman spectroscopy analysis evidenced a high quality of the GO. In the TGA it was observed the mass loss associated with the CX degradation by depolymerization. SEM analysis showed pores in the scaffolds, in addition to HA incorporated and adhered to the polymer. Contact angle test showed that scaffolds have a hydrophilic characteristic, with the CX group the highest contact angle and CXHA the lowest (p < 0.05). 1.0 wt% GO significantly increased the compressive strength compared to other compositions. In the bioactivity test, the apatite crystals precipitation on the scaffold surface was observed. MTT test showed high cell viability in CXHAGO 1.0% and CXHAGO 1.5% scaffold. CXHAGO scaffolds are promising for regenerative dentistry application because they have morphological characteristics, mechanical and biological properties favorable for the regeneration process.
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Affiliation(s)
- Alana Pc Souza
- Department of Restorative Dentistry- Dental Materials Area, Piracicaba Dental School, 28132State University of Campinas - UNICAMP, S.P, Brazil
| | - José G Neves
- Department of Restorative Dentistry- Dental Materials Area, Piracicaba Dental School, 28132State University of Campinas - UNICAMP, S.P, Brazil
| | - Daniel Navarro da Rocha
- Department of Mechanical and Materials Engineering, 28098Military Institute of Engineering- IME, Rio de Janeiro, Brazil.,Department of Bioengineering, 28132R-Crio Criogenia S.A., Campinas, SP, Brazil
| | - Camila C Lopes
- Department of Mechanical and Materials Engineering, 28098Military Institute of Engineering- IME, Rio de Janeiro, Brazil
| | - Ângela M Moraes
- Department of Engineering of Materials and of Bioprocesses, School of Chemical Engineering, 28132University of Campinas UNICAMP, Campinas, SP, Brazil
| | - Lourenço Correr-Sobrinho
- Department of Restorative Dentistry- Dental Materials Area, Piracicaba Dental School, 28132State University of Campinas - UNICAMP, S.P, Brazil
| | - Américo Bortolazzo Correr
- Department of Restorative Dentistry- Dental Materials Area, Piracicaba Dental School, 28132State University of Campinas - UNICAMP, S.P, Brazil
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Souza APC, Neves JG, Navarro da Rocha D, Lopes CC, Moraes ÂM, Correr-Sobrinho L, Correr AB. Chitosan/Xanthan membrane containing hydroxyapatite/Graphene oxide nanocomposite for guided bone regeneration. J Mech Behav Biomed Mater 2022; 136:105464. [PMID: 36209591 DOI: 10.1016/j.jmbbm.2022.105464] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To develop a chitosan-xanthan (CX) membrane associated with Hydroxyapatite (HA) and different concentrations of graphene oxide (GO). METHODOLOGY The CX complex was associated with the hydroxyapatite-graphene oxide (HAGO) nanocomposite in different concentrations. The experimental groups were:1) CX; 2) Chitosan-Xanthan/Hydroxyapatite (CXHA); 3) Chitosan-Xanthan/Hydroxyapatite-Graphene Oxide 0.5% (CXHAGO 0.5%); 4) CXHAGO 1.0%; 5) CXHAGO 1.5%. The membranes characterizations were performed by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, Scanning Electron Microscopy (SEM), Contact angle, Tensile Strength, in vitro Bioactivity and the in vitro Cell viability (MTT test). The data was submitted to the Normality and Homogeneity tests. In vitro Indirect Cytotoxicity assay data was statistically analyzed by two-way ANOVA and Tukey's test (α = 0.05). Tensile Strength and Contact Angle data were statistically analyzed by one-way ANOVA followed by Tukey's test (α = 0.05). RESULTS XRD, FTIR and Raman spectroscopy confirmed the characteristic bands of the CX polymeric complex, the phosphate bands related to HA, and the presence of GO. SEM images demonstrated the non-porous and homogeneous surface of membranes. The contact angle test showed the hydrophilic characteristic of all membranes (p > 0.05). CX showed tensile strength significantly higher than other membranes. The apatite deposition was observed in all membranes after performing the bioactivity test. The cell viability of CXHAGO 1.0% and CXHAGO 1.5% was significantly higher than CX. CONCLUSION The addition of HAGO reduced the mechanical strength of membranes, but improved its cell viability. It demonstrated the potential of CXHAGO membranes to be used in guided bone regeneration therapies.
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Affiliation(s)
- Alana P C Souza
- Department of Restorative Dentistry- Dental Materials Area, Piracicaba Dental School. State University of Campinas - UNICAMP, S.P., Brazil.
| | - José G Neves
- Department of Restorative Dentistry- Dental Materials Area, Piracicaba Dental School. State University of Campinas - UNICAMP, S.P., Brazil.
| | - Daniel Navarro da Rocha
- Department of Mechanical and Materials Engineering, Military Institute of Engineering- IME, Rio de Janeiro, R.J., Brazil; Department of Bioengineering, R-Crio Criogenia S.A., Campinas, S.P., Brazil
| | - Camila C Lopes
- Department of Mechanical and Materials Engineering, Military Institute of Engineering- IME, Rio de Janeiro, R.J., Brazil
| | - Ângela M Moraes
- Department of Engineering of Materials and of Bioprocesses, School of Chemical Engineering, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Lourenço Correr-Sobrinho
- Department of Restorative Dentistry- Dental Materials Area, Piracicaba Dental School. State University of Campinas - UNICAMP, S.P., Brazil
| | - Américo Bortolazzo Correr
- Department of Restorative Dentistry- Dental Materials Area, Piracicaba Dental School. State University of Campinas - UNICAMP, S.P., Brazil
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11
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Xu VW, Nizami MZI, Yin IX, Lung CYK, Yu OY, Chu CH. Caries Management with Non-Metallic Nanomaterials: A Systematic Review. Int J Nanomedicine 2022; 17:5809-5824. [PMID: 36474525 PMCID: PMC9719741 DOI: 10.2147/ijn.s389038] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/23/2022] [Indexed: 07/29/2023] Open
Abstract
BACKGROUND Non-metallic nanomaterials do not stain enamel or dentin. Most have better biocompatibility than metallic nanomaterials do for management of dental caries. OBJECTIVE The objective of this study is to review the types, properties and potential uses of non-metallic nanomaterials systematically for managing dental caries. METHODS Two researchers independently performed a literature search of publications in English using PubMed, Scopus and Web of Science. The keywords used were (nanoparticles OR nanocomposites OR nanomaterials) AND (caries OR tooth decay). They screened the titles and abstracts to identify potentially eligible publications of original research reporting non-metallic nanomaterials for caries management. Then, they retrieved and studied the full text of the identified publications for inclusion in this study. RESULTS Out of 2497 resulting publications, this study included 75 of those. The non-metallic nanomaterials used in these publications were categorized as biological organic nanomaterials (n=45), synthetic organic nanomaterials (n=15), carbon-based nanomaterials (n=13) and selenium nanomaterials (n=2). They inhibited bacteria growth and/or promoted remineralization. They could be incorporated in topical agents (29/75, 39%), dental adhesives (11/75, 15%), restorative fillers (4/75, 5%), dental sealant (3/75, 4%), oral drugs (3/75, 4%), toothpastes (2/75, 3%) and functional candies (1/75, 1%). Other publications (22/75, 29%) do not mention specific applications. However, most publications (67/75, 89%) were in vitro studies. Six publications (6/75, 8%) were animal studies, and only two publications (2/75, 3%) were clinical studies. CONCLUSION The literature showed non-metallic nanomaterials have antibacterial and/or remineralising properties. The most common type of non-metallic nanomaterials for caries management is organic nanomaterials. Non-metallic nanomaterials can be incorporated into dental sealants, toothpaste, dental adhesives, topical agents and even candies and drugs. However, the majority of the publications are in vitro studies, and only two publications are clinical studies.
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Affiliation(s)
- Veena Wenqing Xu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, People’s Republic of China
| | | | - Iris Xiaoxue Yin
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, People’s Republic of China
| | - Christie Ying Kei Lung
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, People’s Republic of China
| | - Ollie Yiru Yu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, People’s Republic of China
| | - Chun Hung Chu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, People’s Republic of China
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12
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Ling L, Wu C, Xing F, Memon SA, Sun H. Recycling Nanoarchitectonics of Graphene Oxide from Carbon Fiber Reinforced Polymer by the Electrochemical Method. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12203657. [PMID: 36296845 PMCID: PMC9609354 DOI: 10.3390/nano12203657] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 05/15/2023]
Abstract
In this paper, an electrochemical method was proposed to recycle nanoarchitectonics of graphene oxide (GO) from carbon fiber reinforced polymer (CFRP). In the recycling process, NaCl solution with varied concentrations (3% and 10%) and tap water were used as electrolyte, while the impressed current density varied from 2.67 A/m2 to 20.63 A/m2. The results indicated that in NaCl electrolyte, the obtained nanoarchitectonics of GO contained a large amount of nano-carbon onions (NCO) produced by etching CFRP, while high purity GO was produced when tap water was used as electrolyte. The higher current density improved the production efficiency and resulted in a finer GO particle size. The proposed recycling method of GO is economical and simple to operate. It also provides an alternate approach to handle discarded CFRP.
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Affiliation(s)
- Li Ling
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Chao Wu
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Feng Xing
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Shazim Ali Memon
- Department of Civil Engineering and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan
| | - Hongfang Sun
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
- Correspondence:
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13
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Kim HS, Ji MK, Jang WH, Alam K, Kim HS, Cho HS, Lim HP. Biological Effects of the Novel Mulberry Surface Characterized by Micro/Nanopores and Plasma-Based Graphene Oxide Deposition on Titanium. Int J Nanomedicine 2021; 16:7307-7317. [PMID: 34737568 PMCID: PMC8560131 DOI: 10.2147/ijn.s311872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 09/22/2021] [Indexed: 12/23/2022] Open
Abstract
Purpose This paper presents a technique for developing a novel surface for dental implants using a combination of nitriding and anodic oxidation, followed by the deposition of graphene oxide using atmospheric plasma. The effects of various surface treatments on bacterial adhesion and osteoblast activation were also evaluated. Methods CP titanium (control) was processed into disk-shaped specimens. Nitriding was conducted using vacuum nitriding, followed by anodic oxidation, which was performed in an electrolyte using a DC power supply, to form the novel “mulberry surface.” Graphene oxide deposition was performed using atmospheric plasma with an inflow of carbon sources. After analyzing the sample surfaces, antibacterial activity was evaluated using Streptococcus mutans and Porphyromonas gingivalis bacteria. The viability, adhesion, proliferation, and differentiation of osteoblasts were also assessed. Analysis of variance (ANOVA) with Tukey’s post-hoc test was used to calculate statistical differences. Results We observed that the mulberry surface was formed on samples treated with nitriding and anodic oxidation, and these samples exhibited more effective antibacterial activity than the control. We also found that the samples with additional graphene oxide deposition exhibited better biocompatibility, which was validated by osteoblast adhesion, proliferation, and differentiation. Conclusion The development of the mulberry surface along with graphene oxide deposition inhibits bacterial adhesion to the implant and enhances the adhesion, proliferation, and differentiation of osteoblasts. These results indicate that the mulberry surface and graphene oxide deposition together can inhibit peri-implantitis and promote osseointegration.
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Affiliation(s)
- Hee-Seon Kim
- Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Min-Kyung Ji
- Optoelectronics Convergence Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Woo-Hyung Jang
- Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Khurshed Alam
- Department of Materials Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hyun-Seung Kim
- Department of Division of New Projects, KJ Meditech Co, Ltd, Gwangju, 61009, Republic of Korea
| | - Hoon-Sung Cho
- Department of Materials Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hyun-Pil Lim
- Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
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Nabih S, Hassn SS. Nonchemical integration of Au/Ag-based reduced graphene nanohybrid combined with 5-Fluorouracil drug to treat cancer cells. Life Sci 2021; 272:119262. [PMID: 33639151 DOI: 10.1016/j.lfs.2021.119262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 02/07/2021] [Accepted: 02/18/2021] [Indexed: 10/22/2022]
Abstract
The perpetual lack of advanced strategies to prevent aggressive breast cancer with multiple categories represents challenging scientific society problems. Reduced graphene oxide- can treat disease, which was recently investigated due to its ability to induce apoptosis-based death. This research tested the chemotherapeutics in vitro efficacy of reduced graphene oxide embedded with gold and silver nanoparticles toward drug-sensitive breast cancer cells (MCF-7) and their cytotoxicity. Synthesis of the Au-Ag/rGO-5FU nanocomposites has been conducted using a wet chemical approach with chitosan aid as a pore directing and capping agent. The particle structure and morphology well characterized using different systems. HR-TEM shows a narrow-sized distribution of less than 100 nm, which is proper for cell membranes and medical use. The physical combination of the nanocomposite and 5-FU drug has been conducted mechanically using wet chemistry. The Au/Ag/rGO-5FU material's high activity enables it to produce reactive oxygen radicals, which display a potential against MCF-7 cell lines. All the results, including those obtained via cytometry, use the combination of Au/Ag/rGO-5FU to show a more substantial anticancer influence and more drug stability than pure 5-FU.
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Affiliation(s)
- Shimaa Nabih
- Basic Science Departments, Modern Academy for Engineering and Technology, Maadi, Egypt.
| | - Shaymaa Sherif Hassn
- Basic Science Departments, Modern Academy for Engineering and Technology, Maadi, Egypt
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Sreekantan S, Hassan M, Sundera Murthe S, Seeni A. Biocompatibility and Cytotoxicity Study of Polydimethylsiloxane (PDMS) and Palm Oil Fuel Ash (POFA) Sustainable Super-Hydrophobic Coating for Biomedical Applications. Polymers (Basel) 2020; 12:polym12123034. [PMID: 33352856 PMCID: PMC7766846 DOI: 10.3390/polym12123034] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 12/09/2020] [Accepted: 12/12/2020] [Indexed: 12/23/2022] Open
Abstract
A sustainable super-hydrophobic coating composed of silica from palm oil fuel ash (POFA) and polydimethylsiloxane (PDMS) was synthesised using isopropanol as a solvent and coated on a glass substrate. FESEM and AFM analyses were conducted to study the surface morphology of the coating. The super-hydrophobicity of the material was validated through goniometry, which showed a water contact angle of 151°. Cytotoxicity studies were conducted by assessing the cell viability and cell morphology of mouse fibroblast cell line (L929) and hamster lung fibroblast cell line (V79) via tetrazolium salt 3-(4–dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and microscopic methods, respectively. The clonogenic assay was performed on cell line V79 and the cell proliferation assay was performed on cell line L929. Both results validate that the toxicity of PDMS: SS coatings is dependent on the concentration of the super-hydrophobic coating. The results also indicate that concentrations above 12.5 mg/mL invariably leads to cell toxicity. These results conclusively support the possible utilisation of the synthesised super-hydrophobic coating for biomedical applications.
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Affiliation(s)
- Srimala Sreekantan
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Pulau Pinang, Malaysia; (M.H.); (S.S.M.)
- Correspondence: ; Tel.: +60-4-5995-255
| | - Mohd Hassan
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Pulau Pinang, Malaysia; (M.H.); (S.S.M.)
| | - Satisvar Sundera Murthe
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Pulau Pinang, Malaysia; (M.H.); (S.S.M.)
| | - Azman Seeni
- Malaysian Institute of Pharmaceuticals and Nutraceuticals (IPHARM), National Institute of Biotechnology Malaysia, Ministry of Science, Technology and Innovation, Bukit Gambir, Gelugor 11700, Pulau Pinang, Malaysia;
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