1
|
Manninen I, Ritasalo R, Hirsjärvi S. Improved properties of glass vials for primary packaging with atomic layer deposition. J Pharm Sci 2024:S0022-3549(24)00411-8. [PMID: 39278592 DOI: 10.1016/j.xphs.2024.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Revised: 09/06/2024] [Accepted: 09/06/2024] [Indexed: 09/18/2024]
Abstract
Novel pharmaceuticals and drug delivery devices may require better performance from the packaging material e.g., in terms of extractables and leachables, and unwanted interactions. To address this, we applied atomic layer deposition (ALD) to build nanometer-range SiO2, ZrO2 and Al2O3-TiO2 films on primary packaging glass. Controlled modification of the surface also enabled creation of functionality without affecting visual appearance of the material. ALD-coated Type I borosilicate vials were compared to uncoated ones, and tailored functionality was presented by appropriate measurements. The tested ALD coatings formed a barrier on glass against extractables and leachables, from the vial and the coating alike. A good ALD coating prevents any leakage into the stored drug product. Hydrolytic resistance results improved by 85-92%, and these results correlated well with straightforward water conductivity measurements. Opposite to uncoated borosilicate glass vials, no extracted elements could be detected from the extracts of the coated vials with stable ALD films. Improved surface integrity was observed with electron microscopy as well. ALD films increased hydrophilicity of the surface and tuning the ALD film thickness and composition allowed precise blocking of UV light wavelengths, without affecting transparency. As a conclusion, ALD is a versatile method to create barrier and functional films on primary packaging materials.
Collapse
Affiliation(s)
- Ilkka Manninen
- Picosun Oy, an Applied Materials company, Masalantie 365, 02430 Masala, Finland.
| | - Riina Ritasalo
- Picosun Oy, an Applied Materials company, Masalantie 365, 02430 Masala, Finland
| | - Samuli Hirsjärvi
- Picosun Oy, an Applied Materials company, Masalantie 365, 02430 Masala, Finland; Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E (P.O.Box 56), Finland
| |
Collapse
|
2
|
Yue HL, Zeng HY, Peng JF, Yan W, Zhang K, Luo CW, Tian ZF. Oxalate-derived porous C-doped NiO with amorphous-crystalline heterophase for supercapacitors. J Colloid Interface Sci 2024; 678:221-232. [PMID: 39243722 DOI: 10.1016/j.jcis.2024.08.254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 08/24/2024] [Accepted: 08/29/2024] [Indexed: 09/09/2024]
Abstract
Constructing amorphous/crystalline heterophase structure with high porosity is a promising strategy to effectively tailor the physicochemical properties of electrode materials and further improve the electrochemical performance of supercapacitors. Here, the porous C-doped NiO (C-NiO) with amorphous/crystalline heterophase grown on NF was prepared using NF as Ni source via a self-sacrificial template method. Calcining the self-sacrificial NiC2O4 template at a suitable temperature (400 °C) was beneficial to the formation of porous heterophase structure with abundant cavities and cracks, resulting in high electrical conductivity and rich ion/electron-transport channels. The density functional theory (DFT) calculations further verified that in-situ C-doping could modulate the electronic structure and enhance the OH- adsorption capability. The unique porous amorphous/crystalline heterophase structure greatly accelerated electrons/ions transfer and Faradaic reaction kinetic, which effectively improved the charge storage. The C-NiO calcined at 400 °C (C-NiO(400)) displayed a markedly enhanced specific charge, outstanding rate property and excellent cycling stability. Furthermore, the hybrid supercapacitor assembled by C-NiO(400) and active carbon achieved a high energy density of 49.0 Wh kg-1 at 800 W kg-1 and excellent cycle stability (90.9 % retention at 5 A/g after 10 000 cycles). This work provided a new strategy for designing amorphous/crystalline heterophase electrode materials in high-performance energy storage.
Collapse
Affiliation(s)
- Hong-Li Yue
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Hong-Yan Zeng
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China.
| | - Jin-Feng Peng
- School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China.
| | - Wei Yan
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Kai Zhang
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Chao-Wei Luo
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Zi-Feng Tian
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
| |
Collapse
|
3
|
Ell M, Bui MT, Kigili S, Zeck G, Prado-López S. Assessment of chemotherapeutic effects on cancer cells using adhesion noise spectroscopy. Front Bioeng Biotechnol 2024; 12:1385730. [PMID: 38803844 PMCID: PMC11128629 DOI: 10.3389/fbioe.2024.1385730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 04/12/2024] [Indexed: 05/29/2024] Open
Abstract
With cancer as one of the leading causes of death worldwide, there is a need for the development of accurate, cost-effective, easy-to-use, and fast drug-testing assays. While the NCI 60 cell-line screening as the gold standard is based on a colorimetric assay, monitoring cells electrically constitutes a label-free and non-invasive tool to assess the cytotoxic effects of a chemotherapeutic treatment on cancer cells. For decades, impedance-based cellular assays extensively investigated various cell characteristics affected by drug treatment but lack spatiotemporal resolution. With progress in microelectrode fabrication, high-density Complementary Metal Oxide Semiconductor (CMOS)-based microelectrode arrays (MEAs) with subcellular resolution and time-continuous recording capability emerged as a potent alternative. In this article, we present a new cell adhesion noise (CAN)-based electrical imaging technique to expand CMOS MEA cell-biology applications: CAN spectroscopy enables drug screening quantification with single-cell spatial resolution. The chemotherapeutic agent 5-Fluorouracil exerts a cytotoxic effect on colorectal cancer (CRC) cells hampering cell proliferation and lowering cell viability. For proof-of-concept, we found sufficient accuracy and reproducibility for CAN spectroscopy compared to a commercially available standard colorimetric biological assay. This label-free, non-invasive, and fast electrical imaging technique complements standardized cancer screening methods with significant advances over established impedance-based approaches.
Collapse
Affiliation(s)
- Maximilian Ell
- Institute of Biomedical Electronics, Faculty of Electrical Engineering and Information Technology, TU Wien, Vienna, Austria
| | - Mai Thu Bui
- Institute of Biomedical Electronics, Faculty of Electrical Engineering and Information Technology, TU Wien, Vienna, Austria
| | - Seyda Kigili
- Institute of Solid State Electronics, Faculty of Electrical Engineering and Information Technology, TU Wien, Vienna, Austria
| | - Günther Zeck
- Institute of Biomedical Electronics, Faculty of Electrical Engineering and Information Technology, TU Wien, Vienna, Austria
| | - Sonia Prado-López
- Institute of Solid State Electronics, Faculty of Electrical Engineering and Information Technology, TU Wien, Vienna, Austria
| |
Collapse
|
4
|
Agosta L, Arismendi-Arrieta D, Dzugutov M, Hermansson K. Origin of the Hydrophobic Behaviour of Hydrophilic CeO 2. Angew Chem Int Ed Engl 2023; 62:e202303910. [PMID: 37011105 DOI: 10.1002/anie.202303910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/02/2023] [Accepted: 04/03/2023] [Indexed: 04/05/2023]
Abstract
The nature of the hydrophobicity found in rare-earth oxides is intriguing. The CeO2 (100) surface, despite its strongly hydrophilic nature, exhibits hydrophobic behaviour when immersed in water. In order to understand this puzzling and counter-intuitive effect we performed a detailed analysis of the confined water structure and dynamics. We report here an ab-initio molecular dynamics simulation (AIMD) study which demonstrates that the first adsorbed water layer, in immediate contact with the hydroxylated CeO2 surface, generates a hydrophobic interface with respect to the rest of the liquid water. The hydrophobicity is manifested in several ways: a considerable diffusion enhancement of the confined liquid water as compared with bulk water at the same thermodynamic condition, a weak adhesion energy and few H-bonds above the hydrophobic water layer, which may also sustain a water droplet. These findings introduce a new concept in water/rare-earth oxide interfaces: hydrophobicity mediated by specific water patterns on a hydrophilic surface.
Collapse
Affiliation(s)
- Lorenzo Agosta
- Department of Chemistry-Ångström, Uppsala University, 751 21, Uppsala, Sweden
| | | | - Mikhail Dzugutov
- Department of Chemistry-Ångström, Uppsala University, 751 21, Uppsala, Sweden
| | - Kersti Hermansson
- Department of Chemistry-Ångström, Uppsala University, 751 21, Uppsala, Sweden
| |
Collapse
|
5
|
Punathil Meethal R, Jalalzai P, Kumar S, Peter J, Klipp A, Kim TG, Park JG. Benzethonium chloride as a tungsten corrosion inhibitor in neutral and alkaline media for the post-chemical mechanical planarization application. J Colloid Interface Sci 2023; 643:465-479. [PMID: 37088050 DOI: 10.1016/j.jcis.2023.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 03/30/2023] [Accepted: 04/03/2023] [Indexed: 04/25/2023]
Abstract
The cleaning solution for the post-chemical mechanical planarization (post-CMP) process of tungsten in neutral-alkaline media requires corrosion inhibitors as an additive, especially for advanced devices where the device node size shrinks below 10 nm. In the present study, the corrosion inhibition performance of benzethonium chloride (BTC) is evaluated in neutral-alkaline conditions. The electrochemical impedance spectroscopy (EIS) analysis showed ∼ 90 % of corrosion inhibition efficiency with an optimum concentration of 0.01 wt% BTC at both pH 7 and 11. Langmuir adsorption isotherm, frontier molecular orbital theory, molecular simulation, contact angle, precipitation study, and X-ray photoelectron spectroscopy analysis were performed to identify the inhibition mechanism of the BTC molecule on the W surface. Based on the proposed mechanism, the electrostatic attraction between the positively charged N atom in the BTC molecule and the negatively charged W surface initiates the adsorption of the molecule. The high dipole moment and large molecular size enhance the physical adsorption of the molecule to the surface. In addition to this, the adsorption isotherm analysis shows that possible chemical interaction with a moderate value of Gibbs free energy change of adsorption exists between the W and BTC molecule. The excellent corrosion inhibition efficiency of BTC on W is confirmed by the frontier molecular orbital theory and molecular dynamic simulation analysis.
Collapse
Affiliation(s)
- Ranjith Punathil Meethal
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea
| | - Palwasha Jalalzai
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea
| | - Sumit Kumar
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea
| | - Jerome Peter
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea
| | | | - Tae-Gon Kim
- Department of Smart Convergence Engineering, Hanyang University, Ansan 15588, Republic of Korea.
| | - Jin-Goo Park
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea.
| |
Collapse
|
6
|
Investigation of Ti/Al2O3 + TiO2 and Ti + TiO2/Al2O3 + TiO2 hybrid coatings as protection of ultra-light Mg–(Li)–Al–RE alloys against corrosion. Sci Rep 2022; 12:19363. [DOI: 10.1038/s41598-022-23452-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 10/31/2022] [Indexed: 11/13/2022] Open
Abstract
AbstractLow corrosion resistance is a significant problem of magnesium alloys, particularly ultra-light magnesium-lithium alloys. Surface treatment is one way to improve their corrosion resistance. The paper presents the results of tests of Ti/Al2O3 + TiO2 and Ti + TiO2/Al2O3 + TiO2 coatings obtained in a hybrid process combining PVD and ALD methods and ALD coating of Al2O3 + TiO2 type obtained on AE42 (Mg–4Li–2RE) and LAE442 (Mg–4Li–4Al–2RE). Structural studies were performed using scanning and transmission electron microscopy (SEM and TEM), atomic force microscopy and EDS and XPS spectroscopic methods. Potentiodynamic tests and electrochemical impedance spectroscopy EIS in 0.05 M NaCl solution were performed to determine the electrochemical properties of the tested materials. Moreover, tests of surface wettability and tribological properties using the ball-on-disc method were performed. Based on the analysis of anodic polarisation curves and Tafel analysis, it was found that the Ti + TiO2/Al2O3 + TiO2 coating showed the best potentiodynamic properties on both substrates. In particular, on the magnesium-lithium substrate, the value of the polarisation resistance of this hybrid coating is Rpol = 14 × 103 Ω × cm2, and the value of the corrosion current is jcorr = 0.4 µA/cm2. For the uncoated LAE442 substrate, the polarisation resistance is Rpol = 1.05 × 103 Ω × cm2, and the corrosion current value is jcorr = 5.49 µA/cm2. This improvement is due to the synergistic effect of the combined PVD and ALD technologies. The study confirmed the impact of hybrid coatings on improving the anti-corrosion and tribological properties of ultra-light magnesium alloys.
Collapse
|
7
|
Gashoul Daresibi F, Khodadadi AA, Mortazavi Y, Huotari S, Ritala M. Highly dispersed atomic layer deposited CrOx on SiO2 catalyst with enhanced yield of propylene for CO2 –mediated oxidative dehydrogenation of propane. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
8
|
Osouli Tabrizi H, Panahi A, Forouhi S, Sadighbayan D, Soheili F, Haji Hosseini Khani MR, Magierowski S, Ghafar-Zadeh E. Oral Cells-On-Chip: Design, Modeling and Experimental Results. Bioengineering (Basel) 2022; 9:218. [PMID: 35621496 PMCID: PMC9137814 DOI: 10.3390/bioengineering9050218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/15/2022] [Accepted: 05/17/2022] [Indexed: 11/23/2022] Open
Abstract
Recent advances in periodontal studies have attracted the attention of researchers to the relation between oral cells and gum diseases, which is a real threat to overall human health. Among various microfabrication technologies, Complementary Metal Oxide Semiconductors (CMOSs) enable the development of low-cost integrated sensors and circuits for rapid and accurate assessment of living cells that can be employed for the early detection and control of periodontal diseases. This paper presents a CMOS capacitive sensing platform that can be considered as an alternative for the analysis of salivatory cells such as oral neutrophils. This platform consists of two sensing electrodes connected to a read-out capacitive circuitry designed and fabricated on the same chip using Austria Mikro Systeme (AMS) 0.35 µm CMOS process. A graphical user interface (GUI) was also developed to interact with the capacitive read-out system and the computer to monitor the capacitance changes due to the presence of saliva cells on top of the chip. Thanks to the wide input dynamic range (IDR) of more than 400 femto farad (fF) and high resolution of 416 atto farad (aF), the experimental and simulation results demonstrate the functionality and applicability of the proposed sensor for monitoring cells in a small volume of 1 µL saliva samples. As per these results, the hydrophilic adhesion of oral cells on the chip varies the capacitance of interdigitated electrodes (IDEs). These capacitance changes then give an assessment of the oral cells existing in the sample. In this paper, the simulation and experimental results set a new stage for emerging sensing platforms for testing oral samples.
Collapse
Affiliation(s)
- Hamed Osouli Tabrizi
- Biologically Inspired Sensors and Actuators (BioSA) Laboratory, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada; (H.O.T.); (A.P.); (S.F.); (D.S.); (F.S.); (M.R.H.H.K.)
- Department of Electrical Engineering and Computer Science, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada;
| | - Abbas Panahi
- Biologically Inspired Sensors and Actuators (BioSA) Laboratory, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada; (H.O.T.); (A.P.); (S.F.); (D.S.); (F.S.); (M.R.H.H.K.)
- Department of Electrical Engineering and Computer Science, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada;
| | - Saghi Forouhi
- Biologically Inspired Sensors and Actuators (BioSA) Laboratory, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada; (H.O.T.); (A.P.); (S.F.); (D.S.); (F.S.); (M.R.H.H.K.)
- Department of Electrical Engineering and Computer Science, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada;
| | - Deniz Sadighbayan
- Biologically Inspired Sensors and Actuators (BioSA) Laboratory, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada; (H.O.T.); (A.P.); (S.F.); (D.S.); (F.S.); (M.R.H.H.K.)
- Department of Biology, Faculty of Science, York University, Toronto, ON M3J 1P3, Canada
| | - Fatemeh Soheili
- Biologically Inspired Sensors and Actuators (BioSA) Laboratory, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada; (H.O.T.); (A.P.); (S.F.); (D.S.); (F.S.); (M.R.H.H.K.)
- Department of Biology, Faculty of Science, York University, Toronto, ON M3J 1P3, Canada
| | - Mohammad Reza Haji Hosseini Khani
- Biologically Inspired Sensors and Actuators (BioSA) Laboratory, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada; (H.O.T.); (A.P.); (S.F.); (D.S.); (F.S.); (M.R.H.H.K.)
| | - Sebastian Magierowski
- Department of Electrical Engineering and Computer Science, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada;
| | - Ebrahim Ghafar-Zadeh
- Biologically Inspired Sensors and Actuators (BioSA) Laboratory, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada; (H.O.T.); (A.P.); (S.F.); (D.S.); (F.S.); (M.R.H.H.K.)
- Department of Electrical Engineering and Computer Science, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada;
- Department of Biology, Faculty of Science, York University, Toronto, ON M3J 1P3, Canada
| |
Collapse
|
9
|
Shi Z, Zhang Z, Huang W, Zeng H, Mandić V, Hu X, Zhao L, Zhang X. Spontaneous Adsorption-Induced Salvinia-like Micropillars with High Adhesion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:6728-6735. [PMID: 34034488 DOI: 10.1021/acs.langmuir.1c00702] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Superhydrophobic surfaces with high adhesion provide high potential for underwater applications. Inspired by Salvinia leaf, here, we have reported a simple method for fabricating adhesive Salvinia-like micropillars via photolithography and spontaneous adsorption of organic molecules from the atmosphere. With continuous hydrocarbon adsorption on sputtered cerium dioxide (CeO2) films, the surface gradually evolved and eventually became chemically heterogeneous. Huge wetting contrast from superhydrophilic to superhydrophobic over exposure time was observed; meanwhile, the wetting mode changed from the Wenzel (W) state to Cassie-Baxter (C-B) state. As a result, hydrophobic hydrocarbons (C-C/C-H) and trapped air between adjacent pillars contributed to the high apparent contact angle (CA), while the hydrophilic domains of C-O/O═C-O and CeO2 on the top layer made the surface highly adhesive with water droplets. In comparison with traditional fluorinated superhydrophobic surfaces, CeO2-coated surfaces showed high adhesive force with water droplets and can be used as a "mechanical hand" for water droplet transport. The adsorption-induced Salvinia-like micropillars with high adhesion may find many other droplet-based applications in microfluidic fields.
Collapse
Affiliation(s)
- Zhen Shi
- Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, People's Republic of China
- Chinese Academy of Sciences (CAS), Suzhou Institute of Nano-Tech and Nano-Bionics, Suzhou 215123, People's Republic of China
| | - Zejun Zhang
- Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, People's Republic of China
| | - Wei Huang
- Chinese Academy of Sciences (CAS), Suzhou Institute of Nano-Tech and Nano-Bionics, Suzhou 215123, People's Republic of China
| | - Hang Zeng
- Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, People's Republic of China
| | - Vilko Mandić
- Department of Inorganic Chemical Technology and Non-metals, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, 10000 Zagreb, Croatia
| | - Xin Hu
- Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, People's Republic of China
- Chinese Academy of Sciences (CAS), Suzhou Institute of Nano-Tech and Nano-Bionics, Suzhou 215123, People's Republic of China
| | - Lizhong Zhao
- Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, People's Republic of China
| | - Xuefeng Zhang
- Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, People's Republic of China
| |
Collapse
|
10
|
Woźniak A, Walke W, Jakóbik-Kolon A, Ziębowicz B, Brytan Z, Adamiak M. The Influence of ZnO Oxide Layer on the Physicochemical Behavior of Ti6Al4V Titanium Alloy. MATERIALS 2021; 14:ma14010230. [PMID: 33466481 PMCID: PMC7796469 DOI: 10.3390/ma14010230] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/26/2020] [Accepted: 12/28/2020] [Indexed: 01/14/2023]
Abstract
Titanium and its alloys are characterized by high biocompatibility and good corrosion resistance as a result of the ability to form a TiO2 oxide layer. However, based on literature data it can be concluded that titanium degradation products, in the form of titanium particles, metal-protein groups, oxides and ions, may cause allergic, inflammatory reactions and bone resorption. The corrosion process of Ti6Al4V in the human body environment may be intensified by a decreased pH and concentration of chloride compounds. The purpose of this article was to analyze the corrosion resistance of the Ti6Al4V alloy, obtained by the selective laser melting method in a corrosion solution of neutral pH and in a solution simulating peri-implant inflammatory conditions. Additionally, the influence of zinc oxide deposited by the atomic layer deposition method on the improvement of the physicochemical behavior of the Ti6Al4V alloy was analyzed. In order to characterize the ZnO layer, tests of chemical and phase composition as well as surface morphology investigation were performed. As part of the assessment of the physicochemical properties of the uncoated samples and those with the ZnO layer, tests of wetting angle, pitting corrosion and impedance corrosion were carried out. The number of ions released after the potentiodynamic test were measured using the inductively coupled plasma atomic emission spectrometry (ICP-AES) method. It can be concluded that samples after surface modification (with the ZnO layer) were characterized by favorable physicochemical properties and had higher corrosion resistance.
Collapse
Affiliation(s)
- Anna Woźniak
- Department of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Street, 44-100 Gliwice, Poland; (B.Z.); (Z.B.); (M.A.)
- Correspondence: ; Tel.: +48-32-2372603
| | - Witold Walke
- Department of Biomaterials and Medical Devices Engineering, Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40 Street, 41-800 Zabrze, Poland;
| | - Agata Jakóbik-Kolon
- Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6 Street, 44-100 Gliwice, Poland;
| | - Bogusław Ziębowicz
- Department of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Street, 44-100 Gliwice, Poland; (B.Z.); (Z.B.); (M.A.)
| | - Zbigniew Brytan
- Department of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Street, 44-100 Gliwice, Poland; (B.Z.); (Z.B.); (M.A.)
| | - Marcin Adamiak
- Department of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Street, 44-100 Gliwice, Poland; (B.Z.); (Z.B.); (M.A.)
| |
Collapse
|
11
|
Current developments and future outlook in nanofluid flooding: A comprehensive review of various parameters influencing oil recovery mechanisms. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.10.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
12
|
Sadgar AL, Deore TS, Jayaram RV. Pickering Interfacial Catalysis-Knoevenagel Condensation in Magnesium Oxide-Stabilized Pickering Emulsion. ACS OMEGA 2020; 5:12224-12235. [PMID: 32548405 PMCID: PMC7271354 DOI: 10.1021/acsomega.0c00819] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 05/07/2020] [Indexed: 06/01/2023]
Abstract
In the present study, a novel catalytic route for the Knoevenagel condensation reaction has been developed by Pickering interfacial catalysis using magnesium oxide (MgO) as both an emulsion stabilizer and a base catalyst. MgO was prepared by the precipitation method using sodium hydroxide or ammonium hydroxide as the precipitating agent and calcined at different temperatures. The calcined samples were characterized by XRD, SEM, TEM, AFM, BET, and DLS techniques. The catalytic application of the emulsions stabilized by MgO was investigated for the Knoevenagel condensation reaction of benzaldehyde and its derivatives with malononitrile. All of the reactions were carried out at an ambient temperature (30 °C) under static conditions without stirring. Both the emulsion-stabilizing ability and the catalytic activity of MgO were found to be affected by the method of preparation, calcination temperature, and the nature of the oil phase. It was observed that the method of preparation varied the texture and morphology of MgO and thus the stability and droplet size of the emulsion formed. This was further reflected in the catalytic activity. The highest yield (87%) of the condensation product was obtained with MgO prepared by precipitation using a strong base (NaOH) and further calcined at 400 °C. The developed catalytic system offers several green chemistry advantages such as reusable solid-base catalyst and use of a single material as both emulsion stabilizer and catalyst. Room-temperature reaction under static conditions is an additional advantage of the developed catalytic system.
Collapse
|
13
|
Gateman SM, Page K, Halimi I, Nascimento ARC, Savoie S, Schulz R, Moreau C, Parkin IP, Mauzeroll J. Corrosion of One-Step Superhydrophobic Stainless-Steel Thermal Spray Coatings. ACS APPLIED MATERIALS & INTERFACES 2020; 12:1523-1532. [PMID: 31820910 DOI: 10.1021/acsami.9b17836] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
As most superhydrophobic coatings are made of soft materials, the need for harder, more robust films is evident in applications where erosional degradation is of concern. The work herein describes a methodology to produce superhydrophobic stainless-steel thermal spray coatings using the high-velocity oxygen fuel technique. Due to the use of a kerosene fuel source, a carbon-rich film is formed on the surface of the thermal spray coatings, lowering the surface energy of the high-energy metallic substrates. The thermal spray process generates a hierarchical micro-/sub-micro-structure that is needed to sustain superhydrophobicity. The effect of spray parameters such as particle velocity and temperature on the coating's hydrophobicity state was explored, and a high particle velocity was shown to cause superhydrophobic characteristics. The coatings were characterized using scanning electron microscopy, profilometry, X-ray photoelectron spectroscopy, static water contact angle measurements, water droplet roll-off measurements, and water droplet bouncing tests. The corrosion behavior of the coatings was studied using potentiodynamic polarization measurements in order to correlate water repellency with corrosion resistance; however, all coatings demonstrated active corrosion without passivation. This study describes an interesting phenomenon where superhydrophobicity does not guarantee corrosion resistance and discusses alternative applications for such materials.
Collapse
Affiliation(s)
- Samantha Michelle Gateman
- Laboratory for Electrochemical Reactive Imaging and Detection of Biological Systems , McGill University , Montreal , Quebec H3A 0B8 , Canada
| | - Kristopher Page
- Materials Chemistry Department , University College London , London WC1E 6BT , United Kingdom
| | - Ilias Halimi
- Laboratory for Electrochemical Reactive Imaging and Detection of Biological Systems , McGill University , Montreal , Quebec H3A 0B8 , Canada
| | | | - Sylvio Savoie
- Institut de recherche d'Hydro-Québec , Varennes , Quebec J3X 1S1 , Canada
| | - Robert Schulz
- Institut de recherche d'Hydro-Québec , Varennes , Quebec J3X 1S1 , Canada
| | - Christian Moreau
- Thermal Spray and Multiphase Flow Laboratory , Concordia University , Montreal , Quebec H3G 1M8 , Canada
| | - Ivan P Parkin
- Materials Chemistry Department , University College London , London WC1E 6BT , United Kingdom
| | - Janine Mauzeroll
- Laboratory for Electrochemical Reactive Imaging and Detection of Biological Systems , McGill University , Montreal , Quebec H3A 0B8 , Canada
| |
Collapse
|