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Yan C, Tong H, Liu C, Ye X, Yuan X, Xu J, Li H. Activation of polyimide by oxygen plasma for atomic layer deposition of highly compact titanium oxide coating. Nanotechnology 2024; 35:265704. [PMID: 38522103 DOI: 10.1088/1361-6528/ad3743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 03/24/2024] [Indexed: 03/26/2024]
Abstract
Titanium oxide (TiO2) coated polyimide has broad application prospects under extreme conditions. In order to obtain a high-quality ultra-thin TiO2coating on polyimide by atomic layer deposition (ALD), the polyimide was activated byin situoxygen plasma. It was found that a large number of polar oxygen functional groups, such as carboxyl, were generated on the surface of the activated polyimide, which can significantly promote the preparation of TiO2coating by ALD. The nucleation and growth of TiO2were studied by x-ray photoelectron spectroscopy monitoring and scanning electron microscopy observation. On the polyimide activated by oxygen plasma, the size of TiO2nuclei decreased and the quantity of TiO2nuclei increased, resulting in the growth of a highly uniform and dense TiO2coating. This coating exhibited excellent resistance to atomic oxygen. When exposed to 3.5 × 1021atom cm-2atomic oxygen flux, the erosion yield of the polyimide coated with 100 ALD cycles of TiO2was as low as 3.0 × 10-25cm3/atom, which is one order less than that of the standard POLYIMIDE-ref Kapton®film.
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Affiliation(s)
- Chi Yan
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Hua Tong
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Cui Liu
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Xiaojun Ye
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Xiao Yuan
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Jiahui Xu
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Hongbo Li
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
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2
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Beltsios E, Zubarevich A, Ruemke S, Rubalskii E, Osswald A, Arjomandi Rad A, Heidenau F, Buer J, Hanke J, Schmitto J, Popov AF, Kuehn C, Schmack B, Ruhparwar A, Weymann A. Antibacterial copper-filled TiO 2 coating of cardiovascular implants to prevent infective endocarditis-A pilot study. Artif Organs 2024; 48:356-364. [PMID: 38010063 DOI: 10.1111/aor.14688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/15/2023] [Accepted: 11/07/2023] [Indexed: 11/29/2023]
Abstract
BACKGROUND Infective endocarditis (IE) poses a significant health risk, especially in patients with prosthetic heart valves. Despite advances in treatment, mortality rates remain high. This study aims to investigate the antibacterial properties of a copper titanium dioxide (4× Cu-TiO2) coating on cardiovascular implants against Staphylococcus aureus, a common causative agent of IE. METHODS Titanium oxide carriers functionalized with copper ions were employed as an antibacterial coating for heart and vascular prostheses. The coating's antibacterial efficacy was assessed using S. aureus ATCC 29213. Microscopic evaluations were conducted on both biological and artificial materials. Antibacterial activity was qualitatively assessed via a modified disc diffusion method and quantitatively measured through colony counts in NaCl suspensions. RESULTS The coating process was successfully applied to all tested cardiovascular prosthetic materials. Qualitative assessments of antibacterial effectiveness revealed an absence of bacterial growth in the area directly beneath the coated valve. Quantitative evaluations showed a significant reduction in bacterial colonization on coated mechanical valves, with 2.95 × 104 CFU per valve, compared to 1.91 × 105 CFU in control valves. CONCLUSIONS The 4× Cu-TiO2 coating demonstrated promising antibacterial properties against S. aureus, suggesting its potential as an effective strategy for reducing the risk of bacterial colonization of cardiovascular implants. Further studies are needed to assess the longevity of the coating and its efficacy against other pathogens.
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Affiliation(s)
- Eleftherios Beltsios
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Alina Zubarevich
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Stefan Ruemke
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Evgenii Rubalskii
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Anja Osswald
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center, University of Duisburg-Essen, Essen, Germany
| | | | | | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Jasmin Hanke
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Jan Schmitto
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Aron-Frederik Popov
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Christian Kuehn
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Bastian Schmack
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Arjang Ruhparwar
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Alexander Weymann
- Department of Cardiothoracic, Transplant and Vascular Surgery, Hannover Medical School, Hannover, Germany
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Huang W, Wang H, Hu R, Liu J, Yang L, Zhu M. Combining Structural Modification and Electrolyte Regulation to Enable Long-Term Cyclic Stability of MoO 3-x @TiO 2 as Cathode for Aqueous Zn-Ion Batteries. Small 2023; 19:e2303286. [PMID: 37264708 DOI: 10.1002/smll.202303286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 05/16/2023] [Indexed: 06/03/2023]
Abstract
Orthorhombic MoO3 (α-MoO3 ) with multivalent redox couple of Mo6+ /Mo4+ and layered structure is a promising cathode for rechargeable aqueous Zn-ion batteries (AZIBs). However, pure α-MoO3 suffers rapid capacity decay due to the serious dissolution and structural collapse. Meanwhile, the growth of byproduct and dendrite on the anode also lead to the deterioration of cyclic stability. This article establishes the mechanism of proton intercalation into MoO3 and proposes a joint strategy combining structural modification with electrolyte regulation to enhance the cyclic stability of MoO3 without sacrificing the capacity. In ZnSO4 electrolyte with Al2 (SO4 )3 additive, TiO2 coated oxygen-deficient α-MoO3 (MoO3-x @TiO2 ) delivers a reversible capacity of 93.2 mA h g-1 at 30 A g-1 after 5000 cycles. The TiO2 coating together with the oxygen deficiency avoids structural damage while facilitating proton diffusion. Besides, the additive of Al2 (SO4 )3 , acting as a pump, continuously supplements protons through dynamic hydrolysis, avoiding the formation of Zn4 SO4 (OH)6 ·xH2 O byproducts at both MoO3-x @TiO2 and Zn anode. In addition, Al2 (SO4 )3 additive facilitates uniform deposition of Zn owing to the tip-blocking effect of Al3+ ion. The study demonstrates that the joint strategy is beneficial for both cathode and anode, which may shed some light on the development of AZIBs.
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Affiliation(s)
- Wenjie Huang
- School of Materials Science and Engineering, and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Hui Wang
- School of Materials Science and Engineering, and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Renzong Hu
- School of Materials Science and Engineering, and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Jun Liu
- School of Materials Science and Engineering, and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Lichun Yang
- School of Materials Science and Engineering, and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Min Zhu
- School of Materials Science and Engineering, and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510640, P. R. China
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Jekal S, Kim J, Lu Q, Kim DH, Noh J, Kim HY, Kim MJ, Kim MS, Oh WC, Choi HJ, Yoon CM. Development of Novel Colorful Electrorheological Fluids. Nanomaterials (Basel) 2022; 12:3113. [PMID: 36144903 PMCID: PMC9504833 DOI: 10.3390/nano12183113] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 08/31/2022] [Accepted: 09/06/2022] [Indexed: 06/16/2023]
Abstract
Herein, the electrorheological (ER) performances of ER fluids were correlated with their colors to allow for the visual selection of the appropriate fluid for a specific application using naked eyes. A series of TiO2-coated synthetic mica materials colored white, yellow, red, violet, blue, and green (referred to as color mica/TiO2 materials) were fabricated via a facile sol-gel method. The colors were controlled by varying the thickness of the TiO2 coating layer, as the coatings with different thicknesses exhibited different light interference effects. The synthesized color mica/TiO2 materials were mixed with silicone oil to prepare colored ER fluids. The ER performances of the fluids decreased with increasing thickness of the TiO2 layer in the order of white, yellow, red, violet, blue, and green materials. The ER performance of differently colored ER fluids was also affected by the electrical conductivity, dispersion stability, and concentrations of Na+ and Ca2+ ions. This pioneering study may provide a practical strategy for developing new ER fluid systems in future.
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Affiliation(s)
- Suk Jekal
- Department of Chemical and Biological Engineering, Hanbat National University, Yuseong-gu, Daejeon 34158, Korea
| | - Jiwon Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Yuseong-gu, Daejeon 34158, Korea
| | - Qi Lu
- Department of Polymer Science and Engineering, Inha University, Michuhol-gu, Incheon 22212, Korea
- Program of Environmental and Polymer Engineering, Inha University, Michuhol-gu, Incheon 22212, Korea
| | - Dong-Hyun Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Yuseong-gu, Daejeon 34158, Korea
| | - Jungchul Noh
- McKetta Department of Chemical Engineering and Texas Material Institute, The University of Texas at Austin, Austin, TX 78712, USA
| | - Ha-Yeong Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Yuseong-gu, Daejeon 34158, Korea
| | - Min-Jeong Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Yuseong-gu, Daejeon 34158, Korea
| | - Min-Sang Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Yuseong-gu, Daejeon 34158, Korea
| | - Won-Chun Oh
- Department of Advanced Materials Science and Engineering, Hanseo University, Seosan-si 31962, Korea
| | - Hyoung-Jin Choi
- Department of Polymer Science and Engineering, Inha University, Michuhol-gu, Incheon 22212, Korea
- Program of Environmental and Polymer Engineering, Inha University, Michuhol-gu, Incheon 22212, Korea
| | - Chang-Min Yoon
- Department of Chemical and Biological Engineering, Hanbat National University, Yuseong-gu, Daejeon 34158, Korea
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Labuto G, Sanches S, Crespo JG, Pereira VJ, Huertas RM. Stability of Polymeric Membranes to UV Exposure before and after Coating with TiO 2 Nanoparticles. Polymers (Basel) 2021; 14:polym14010124. [PMID: 35012146 PMCID: PMC8747730 DOI: 10.3390/polym14010124] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/24/2021] [Accepted: 10/14/2021] [Indexed: 12/05/2022] Open
Abstract
The combination of photocatalysis and membrane filtration in a single reactor has been proposed, since the photocatalytic treatment may degrade the pollutants retained by the membrane and reduce fouling. However, polymeric membranes can be susceptible to degradation by UV radiation and free radicals. In the present study, five commercial polymeric membranes were exposed to ultraviolet (UV) radiation before and after applying a sol–gel coating with TiO2 nanoparticles. Membrane stability was characterized by changes in hydrophilicity as well as analysis of soluble substances and nanoparticles detached into the aqueous medium, and by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and energy-dispersive X-ray spectrometry (EDS) for structural, morphological, and elemental distribution analysis, respectively. The TiO2 coating conferred photocatalytic properties to the membranes and protected them during 6 h of UV radiation exposures, reducing or eliminating chemical and morphological changes, and in some cases, improving their mechanical resistance. A selected commercial nanofiltration membrane was coated with TiO2 and used in a hybrid reactor with a low-pressure UV lamp, promoting photocatalysis coupled with cross-flow filtration in order to remove 17α-ethinylestradiol spiked into an aqueous matrix, achieving an efficiency close to 100% after 180 min of combined filtration and photocatalysis, and almost 80% after 90 min.
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Affiliation(s)
- Geórgia Labuto
- Department of Chemistry, Universidade Federal de São Paulo, Diadema 09913-030, Brazil
- Laboratory of Integrated Sciences—LabInSciences, Universidade Federal de São Paulo, Diadema 09913-030, Brazil
- Correspondence:
| | - Sandra Sanches
- iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras, Portugal; (S.S.); (V.J.P.); (R.M.H.)
| | - João G. Crespo
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal;
| | - Vanessa J. Pereira
- iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras, Portugal; (S.S.); (V.J.P.); (R.M.H.)
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Rosa M. Huertas
- iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras, Portugal; (S.S.); (V.J.P.); (R.M.H.)
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal;
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Zhao H, Qi Y, Liang K, Li J, Zhou L, Chen J, Huang X, Ren Y. Interface-Driven Pseudocapacitance Endowing Sandwiched CoSe 2/N-Doped Carbon/TiO 2 Microcubes with Ultra-Stable Sodium Storage and Long-Term Cycling Stability. ACS Appl Mater Interfaces 2021; 13:61555-61564. [PMID: 34913689 DOI: 10.1021/acsami.1c20154] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Cobalt diselenide (CoSe2) has drawn great concern as an anode material for sodium-ion batteries due to its considerable theoretical capacity. Nevertheless, the poor cycling stability and rate performance still impede its practical implantation. Here, CoSe2/nitrogen-doped carbon-skeleton hybrid microcubes with a TiO2 layer (denoted as TNC-CoSe2) are favorably prepared via a facile template-engaged strategy, in which a TiO2-coated Prussian blue analogue of Co3[Co(CN)6]2 is used as a new precursor accompanied with a selenization procedure. Such structures can concurrently boost ion and electron diffusion kinetics and inhibit the structural degradation during cycling through the close contact between the TiO2 layer and NC-CoSe2. Besides, this hybrid structure promotes the superior Na-ion intercalation pseudocapacitance due to the well-designed interfaces. The as-prepared TNC-CoSe2 microcubes exhibit a superior cycling capability (511 mA h g-1 at 0.2 A g-1 after 200 cycles) and long cycling life (456 mA h g-1 at 6.4 A g-1 for 6000 cycles with a retention of 92.7%). Coupled with a sodium vanadium fluorophosphate (Na3V2(PO4)2F3)@C cathode, this assembled full cell displays a specific capacity of 281 mA h g-1 at 0.2 A g-1 for 100 cycles. This work can be potentially used to improve other metal selenide-based anodes for rechargeable batteries.
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Affiliation(s)
- Hongshun Zhao
- School of Materials Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery, Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power Battery, Changzhou University, Changzhou 213164, China
| | - Yanli Qi
- School of Materials Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery, Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power Battery, Changzhou University, Changzhou 213164, China
| | - Kang Liang
- School of Materials Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery, Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power Battery, Changzhou University, Changzhou 213164, China
| | - Jianbin Li
- School of Materials Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery, Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power Battery, Changzhou University, Changzhou 213164, China
| | - Liangyan Zhou
- School of Materials Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery, Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power Battery, Changzhou University, Changzhou 213164, China
| | - Jinyuan Chen
- School of Materials Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery, Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power Battery, Changzhou University, Changzhou 213164, China
| | - Xiaobing Huang
- Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion Aircraft, Hunan Provincial Key Laboratory of Water Treatment Functional Materials, College of Chemistry and Materials Engineering, Hunan University of Arts and Science, Changde 415000, China
| | - Yurong Ren
- School of Materials Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery, Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power Battery, Changzhou University, Changzhou 213164, China
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Jafari Gukeh M, Moitra S, Ibrahim AN, Derrible S, Megaridis CM. Machine Learning Prediction of TiO 2-Coating Wettability Tuned via UV Exposure. ACS Appl Mater Interfaces 2021; 13:46171-46179. [PMID: 34523902 DOI: 10.1021/acsami.1c13262] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Surfaces with extreme wettability (too low, superhydrophobic; too high, superhydrophilic) have attracted considerable attention over the past two decades. Titanium dioxide (TiO2) has been one of the most popular components for generating superhydrophobic/hydrophilic coatings. Combining TiO2 with ethanol and a commercial fluoroacrylic copolymer dispersion, known as PMC, can produce coatings with water contact angles approaching 170°. Another property of interest for this specific TiO2 formulation is its photocatalytic behavior, which causes the contact angle of water to be gradually reduced with rising timed exposure to UV light. While this formulation has been employed in many studies, there exists no quantitative guidance to determine or tune the contact angle (and thus wettability) with the composition of the coating and UV exposure time. In this article, machine learning models are employed to predict the required UV exposure time for any specified TiO2/PMC coating composition to attain a certain wettability (UV-reduced contact angle). For that purpose, eight different coating compositions were applied to glass slides and exposed to UV light for different time intervals. The collected contact-angle data was supplied to different regression models to designate the best method to predict the required UV exposure time for a prespecified wettability. Two types of machine learning models were used: (1) parametric and (2) nonparametric. The results showed a nonlinear behavior between the coating formulation and its contact angle attained after timed UV exposure. Nonparametric methods showed high accuracy and stability with general regression neural network (GRNN) performing best with an accuracy of 0.971, 0.977, and 0.933 on the test, train, and unseen data set, respectively. The present study not only provides quantitative guidance for producing coatings of specified wettability, but also presents a generalized methodology that could be employed for other functional coatings in technological applications requiring precise fluid/surface interactions.
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Affiliation(s)
- Mohamad Jafari Gukeh
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Shashwata Moitra
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Ali Noaman Ibrahim
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
- Mechanical Engineering College, University of Babylon, Hilla 51001, Iraq
| | - Sybil Derrible
- Department of Civil, Materials, and Environmental Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Constantine M Megaridis
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
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Smieszek A, Seweryn A, Marcinkowska K, Sikora M, Lawniczak-Jablonska K, Witkowski BS, Kuzmiuk P, Godlewski M, Marycz K. Titanium Dioxide Thin Films Obtained by Atomic Layer Deposition Promotes Osteoblasts' Viability and Differentiation Potential While Inhibiting Osteoclast Activity-Potential Application for Osteoporotic Bone Regeneration. Materials (Basel) 2020; 13:E4817. [PMID: 33126628 PMCID: PMC7662580 DOI: 10.3390/ma13214817] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/20/2020] [Accepted: 10/26/2020] [Indexed: 12/17/2022]
Abstract
Atomic layer deposition (ALD) technology has started to attract attention as an efficient method for obtaining bioactive, ultrathin oxide coatings. In this study, using ALD, we have created titanium dioxide (TiO2) layers. The coatings were characterised in terms of physicochemical and biological properties. The chemical composition of coatings, as well as thickness, roughness, wettability, was determined using XPS, XRD, XRR. Cytocompatibillity of ALD TiO2 coatings was accessed applying model of mouse pre-osteoblast cell line MC3T3-E1. The accumulation of transcripts essential for bone metabolism (both mRNA and miRNA) was determined using RT-qPCR. Obtained ALD TiO2 coatings were characterised as amorphous and homogeneous. Cytocompatibility of the layers was expressed by proper morphology and growth pattern of the osteoblasts, as well as their increased viability, proliferative and metabolic activity. Simultaneously, we observed decreased activity of osteoclasts. Obtained coatings promoted expression of Opn, Coll-1, miR-17 and miR-21 in MC3T3-E1 cells. The results are promising in terms of the potential application of TiO2 coatings obtained by ALD in the field of orthopaedics, especially in terms of metabolic- and age-related bone diseases, including osteoporosis.
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Affiliation(s)
- Agnieszka Smieszek
- Department of Experimental Biology, Wroclaw University of Environmental and Life Sciences, Norwida St. 27 B, PL-50375 Wroclaw, Poland; (A.S.); (K.M.); (M.S.)
| | - Aleksandra Seweryn
- Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland; (K.L.-J.); (B.S.W.); (P.K.); (M.G.)
| | - Klaudia Marcinkowska
- Department of Experimental Biology, Wroclaw University of Environmental and Life Sciences, Norwida St. 27 B, PL-50375 Wroclaw, Poland; (A.S.); (K.M.); (M.S.)
| | - Mateusz Sikora
- Department of Experimental Biology, Wroclaw University of Environmental and Life Sciences, Norwida St. 27 B, PL-50375 Wroclaw, Poland; (A.S.); (K.M.); (M.S.)
| | - Krystyna Lawniczak-Jablonska
- Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland; (K.L.-J.); (B.S.W.); (P.K.); (M.G.)
| | - Bartlomiej. S. Witkowski
- Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland; (K.L.-J.); (B.S.W.); (P.K.); (M.G.)
| | - Piotr Kuzmiuk
- Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland; (K.L.-J.); (B.S.W.); (P.K.); (M.G.)
| | - Marek Godlewski
- Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland; (K.L.-J.); (B.S.W.); (P.K.); (M.G.)
| | - Krzysztof Marycz
- International Institute of Translational Medicine, Jesionowa 11 Street, 55-124 Malin, Poland
- Collegium Medicum, Institute of Medical Science, Cardinal Stefan Wyszynski University (UKSW), Wóycickiego 1/3, 01-938 Warsaw, Poland
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Park MJ, Kim JH, Oh SW. Inactivation of Salmonella Typhimurium and Escherichia coli O157:H7 on black pepper powder using UV-C, UV-A and TiO 2 coating. Food Sci Biotechnol 2020; 29:283-291. [PMID: 32064137 PMCID: PMC6992800 DOI: 10.1007/s10068-019-00651-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/28/2019] [Accepted: 07/18/2019] [Indexed: 10/30/2022] Open
Abstract
This study was conducted to measure the inactivation characteristics of UVs and TiO2 against Salmonella. Typhimurium and Escherichia coli O157:H7 on black pepper powder. The sample was irradiated by UV-A and UV-C combined with TiO2 coating. After treatment, microbial and physicochemical analysis was carried out. Among various sterilization conditions, the largest number of pathogen in black pepper powder was inactivated by UV-A and UV-C combined with TiO2 coating. The microbial count of black pepper powder treated simultaneously with UV-A and UV-C was less than that of black pepper powder treated with alone. The inactivation effect of UV-A and UV-C was increased when TiO2 coating was combined. Moisture content was decreased with increasing treatment time, but color did not change. In this study, it was indicated that the combined treatment of UV-C, UV-A and TiO2 coating was effective for reducing S. Typhimurium and E. coli O157:H7 on black pepper powder.
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Affiliation(s)
- Mi-Jung Park
- Department of Food and Nutrition, Kookmin University, Seoul, 02727 Republic of Korea
| | - Jin-Hee Kim
- Department of Food and Nutrition, Kookmin University, Seoul, 02727 Republic of Korea
| | - Se-Wook Oh
- Department of Food and Nutrition, Kookmin University, Seoul, 02727 Republic of Korea
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Jung HJ, Nam K, Sung HG, Hyun HS, Sohn Y, Shin WG. Preparation of TiO₂-Decorated Boron Particles by Wet Ball Milling and their Photoelectrochemical Hydrogen and Oxygen Evolution Reactions. Materials (Basel) 2016; 9:E1012. [PMID: 28774132 DOI: 10.3390/ma9121012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 11/19/2016] [Accepted: 12/07/2016] [Indexed: 11/17/2022]
Abstract
TiO₂-coated boron particles were prepared by a wet ball milling method, with the particle size distribution and average particle size being easily controlled by varying the milling operation time. Based on the results from X-ray photoelectron spectroscopy, transmission electron microscopy, energy dispersive X-ray analysis, and Fourier transform infrared spectroscopy, it was confirmed that the initial oxide layer on the boron particles surface was removed by the wet milling process, and that a new B-O-Ti bond was formed on the boron surface. The uniform TiO₂ layer on the 150 nm boron particles was estimated to be 10 nm thick. Based on linear sweep voltammetry, cyclic voltammetry, current-time amperometry, and electrochemical impedance analyses, the potential for the application of TiO₂-coated boron particles as a photoelectrochemical catalyst was demonstrated. A current of 250 μA was obtained at a potential of 0.5 V for hydrogen evolution, with an onset potential near to 0.0 V. Finally, a current of 220 μA was obtained at a potential of 1.0 V for oxygen evolution.
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Wang X, Wu G, Zhou B, Shen J. Optical Constants of Crystallized TiO₂ Coatings Prepared by Sol-Gel Process. Materials (Basel) 2013; 6:2819-2830. [PMID: 28811410 PMCID: PMC5521283 DOI: 10.3390/ma6072819] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 06/09/2013] [Accepted: 07/09/2013] [Indexed: 11/18/2022]
Abstract
Titanium oxide coatings have been deposited by the sol-gel dip-coating method. Crystallization of titanium oxide coatings was then achieved through thermal annealing at temperatures above 400 °C. The structural properties and surface morphology of the crystallized coatings were studied by micro-Raman spectroscopy and atomic force microscopy, respectively. Characterization technique, based on least-square fitting to the measured reflectance and transmittance spectra, is used to determine the refractive indices of the crystallized TiO2 coatings. The stability of the synthesized sol was also investigated by dynamic light scattering particle size analyzer. The influence of the thermal annealing on the optical properties was then discussed. The increase in refractive index with high temperature thermal annealing process was observed, obtaining refractive index values from 1.98 to 2.57 at He-Ne laser wavelength of 633 nm. The Raman spectroscopy and atomic force microscopy studies indicate that the index variation is due to the changes in crystalline phase, density, and morphology during thermal annealing.
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Affiliation(s)
- Xiaodong Wang
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Pohl Institute of Solid State Physics, Tongji University, Siping Road 1239, Shanghai 200092, China.
| | - Guangming Wu
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Pohl Institute of Solid State Physics, Tongji University, Siping Road 1239, Shanghai 200092, China.
| | - Bin Zhou
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Pohl Institute of Solid State Physics, Tongji University, Siping Road 1239, Shanghai 200092, China.
| | - Jun Shen
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Pohl Institute of Solid State Physics, Tongji University, Siping Road 1239, Shanghai 200092, China.
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