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Dogan G, Demir SO, Gutzler R, Gruhn H, Dayan CB, Sanli UT, Silber C, Culha U, Sitti M, Schütz G, Grévent C, Keskinbora K. Bayesian Machine Learning for Efficient Minimization of Defects in ALD Passivation Layers. ACS Appl Mater Interfaces 2021; 13:54503-54515. [PMID: 34735111 PMCID: PMC8603353 DOI: 10.1021/acsami.1c14586] [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] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
Atomic layer deposition (ALD) is an enabling technology for encapsulating sensitive materials owing to its high-quality, conformal coating capability. Finding the optimum deposition parameters is vital to achieving defect-free layers; however, the high dimensionality of the parameter space makes a systematic study on the improvement of the protective properties of ALD films challenging. Machine-learning (ML) methods are gaining credibility in materials science applications by efficiently addressing these challenges and outperforming conventional techniques. Accordingly, this study reports the ML-based minimization of defects in an ALD-Al2O3 passivation layer for the corrosion protection of metallic copper using Bayesian optimization (BO). In all experiments, BO consistently minimizes the layer defect density by finding the optimum deposition parameters in less than three trials. Electrochemical tests show that the optimized layers have virtually zero film porosity and achieve five orders of magnitude reduction in corrosion current as compared to control samples. Optimized parameters of surface pretreatment using Ar/H2 plasma, the deposition temperature above 200 °C, and 60 ms pulse time quadruple the corrosion resistance. The significant optimization of ALD layers presented in this study demonstrates the effectiveness of BO and its potential outreach to a broader audience, focusing on different materials and processes in materials science applications.
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Affiliation(s)
- Gül Dogan
- Robert
Bosch GmbH, Automotive Electronics, Postfach 13 42, 72703 Reutlingen, Germany
- Max
Planck Institute for Intelligent Systems, Heisenbergstr 3, 70569 Stuttgart, Germany
| | - Sinan O. Demir
- Max
Planck Institute for Intelligent Systems, Heisenbergstr 3, 70569 Stuttgart, Germany
| | - Rico Gutzler
- Max
Planck Institute for Solid State Research, Heisenbergstr 1, 70569 Stuttgart, Germany
| | - Herbert Gruhn
- Robert
Bosch GmbH, Corporate Sector Research and Advance Engineering , Robert-Bosch-Campus1, 71272 Stuttgart, Germany
| | - Cem B. Dayan
- Max
Planck Institute for Intelligent Systems, Heisenbergstr 3, 70569 Stuttgart, Germany
| | - Umut T. Sanli
- Max
Planck Institute for Intelligent Systems, Heisenbergstr 3, 70569 Stuttgart, Germany
| | - Christian Silber
- Robert
Bosch GmbH, Automotive Electronics, Postfach 13 42, 72703 Reutlingen, Germany
| | - Utku Culha
- Max
Planck Institute for Intelligent Systems, Heisenbergstr 3, 70569 Stuttgart, Germany
| | - Metin Sitti
- Max
Planck Institute for Intelligent Systems, Heisenbergstr 3, 70569 Stuttgart, Germany
| | - Gisela Schütz
- Max
Planck Institute for Intelligent Systems, Heisenbergstr 3, 70569 Stuttgart, Germany
| | - Corinne Grévent
- Robert
Bosch GmbH, Automotive Electronics, Postfach 13 42, 72703 Reutlingen, Germany
| | - Kahraman Keskinbora
- Max
Planck Institute for Intelligent Systems, Heisenbergstr 3, 70569 Stuttgart, Germany
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Yousefi S, Ghasemi B. Mg(OH)2 nanostructures using impure brine: optimization of synthesis parameters by Taguchi robust design and study of optical properties. Res Chem Intermed 2021; 47:2029-47. [DOI: 10.1007/s11164-020-04383-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gao Z, Cheng G, Yang H, Xue X, Ri J. Preparation of Ferrotitanium Using Ilmenite with Different Reduction Degrees. Metals 2019; 9:962. [DOI: 10.3390/met9090962] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effect of ilmenite with different reduction degrees on the production of ferrotitanium, using a self-propagation high-temperature synthesis method with aluminum as the reducing agent, was investigated. Increasing the degree of reduction not only contributed to lower consumption of aluminum, but also lowered the oxygen content and improved the grades of titanium and iron in the ferrotitanium. The aluminum content of the ferrotitanium increased with an increase in the extent of reduction of ilmenite, so the Al2O3 content formed in the slag decreased with the constant addition of CaO and CaF2 to the Al powder. This decreased relatively the content of high-melting-point CaAl12O19 and increased the contents of low-melting-point CaAl2O4 and CaF2 in the slag, thereby promoting the separation of ferrotitanium and slag. Improving the reduction degree of ilmenite is beneficial to the preparation of ferrotitanium.
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Khalaj M, Kamali M, Khodaparast Z, Jahanshahi A. Copper-based nanomaterials for environmental decontamination - An overview on technical and toxicological aspects. Ecotoxicol Environ Saf 2018; 148:813-824. [PMID: 29197796 DOI: 10.1016/j.ecoenv.2017.11.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/18/2017] [Accepted: 11/22/2017] [Indexed: 06/07/2023]
Abstract
Synthesis of the various types of engineered nanomaterials has gained a huge attention in recent years for various applications. Copper based nanomaterials are a branch of this category seem to be able to provide an efficient and cost-effective way for the treatment of the persistent effluents. The present work aimed to study the various parameters may involve in the overall performance of the copper based nanomaterials for environmental clean-up purposes. To this end, the related characteristics of copper based nanomaterials and their effects on the nanomaterials reactivity and the environmental and operating parameters have been critically reviewed. Toxicological study of the copper based nanomaterials has been also considered as a factor with high importance for the selection of a typical nanomaterial with optimum performance and minimum environmental and health subsequent effects.
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Affiliation(s)
- Mohammadreza Khalaj
- Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mohammadreza Kamali
- Department of Environment and Planning, Center for Environmental and Marine Studies, CESAM, Aveiro Institute of Materials, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Zahra Khodaparast
- Department of Biology, Center for Environmental and Marine Studies, CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Akram Jahanshahi
- Department of Economics, Management, Industrial Engineering and Tourism, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
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Li Y, Chen G, Peng J, Srinivasakannan C, Ruan R. Study of the oxygen reduction of low valent titanium in high titanium slag by microwave rapid heating. POWDER TECHNOL 2017; 315:318-21. [DOI: 10.1016/j.powtec.2017.04.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mahani AAZ, Manteghian M, Pahlavanzadeh H. Synthesis of silver nanoparticles by gelcasting using a low toxic monomer and optimization of gelation time using the Taguchi method. Particulate Science and Technology 2017. [DOI: 10.1080/02726351.2016.1154907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Mehrdad Manteghian
- Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
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EL-Moslamy SH, Elkady MF, Rezk AH, Abdel-Fattah YR. Applying Taguchi design and large-scale strategy for mycosynthesis of nano-silver from endophytic Trichoderma harzianum SYA.F4 and its application against phytopathogens. Sci Rep 2017; 7:45297. [PMID: 28349997 PMCID: PMC5368611 DOI: 10.1038/srep45297] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 02/14/2017] [Indexed: 11/26/2022] Open
Abstract
Development of reliable and low-cost requirement for large-scale eco-friendly biogenic synthesis of metallic nanoparticles is an important step for industrial applications of bionanotechnology. In the present study, the mycosynthesis of spherical nano-Ag (12.7 ± 0.8 nm) from extracellular filtrate of local endophytic T. harzianum SYA.F4 strain which have interested mixed bioactive metabolites (alkaloids, flavonoids, tannins, phenols, nitrate reductase (320 nmol/hr/ml), carbohydrate (25 μg/μl) and total protein concentration (2.5 g/l) was reported. Industrial mycosynthesis of nano-Ag can be induced with different characters depending on the fungal cultivation and physical conditions. Taguchi design was applied to improve the physicochemical conditions for nano-Ag production, and the optimum conditions which increased its mass weight 3 times larger than a basal condition were as follows: AgNO3 (0.01 M), diluted reductant (10 v/v, pH 5) and incubated at 30 °C, 200 rpm for 24 hr. Kinetic conversion rates in submerged batch cultivation in 7 L stirred tank bioreactor on using semi-defined cultivation medium was as follows: the maximum biomass production (Xmax) and maximum nano-Ag mass weight (Pmax) calculated (60.5 g/l and 78.4 g/l respectively). The best nano-Ag concentration that formed large inhibition zones was 100 μg/ml which showed against A.alternate (43 mm) followed by Helminthosporium sp. (35 mm), Botrytis sp. (32 mm) and P. arenaria (28 mm).
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Affiliation(s)
- Shahira H. EL-Moslamy
- Bioprocess development Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technology Applications, New Borg El-Arab City, Alexandria, Egypt
| | - Marwa F. Elkady
- Chemical and Petrochemical Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria, Egypt
- Fabrication Technology Researches Department Advanced Technology and New Materials and Research Institute, City of Scientific Research and Technological Applications, New Borg El-Arab City, Alexandria, Egypt
| | - Ahmed H. Rezk
- Bioprocess development Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technology Applications, New Borg El-Arab City, Alexandria, Egypt
| | - Yasser R. Abdel-Fattah
- Bioprocess development Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technology Applications, New Borg El-Arab City, Alexandria, Egypt
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Affiliation(s)
- Emilia Gîlcă
- INCDO-INOE 2000, Research Institute for Analytical Instrumentation, Cluj-Napoca, Romania
| | - Andrada Măicăneanu
- Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj Napoca, Romania
| | - Árpád Imre-Lucaci
- Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj Napoca, Romania
| | - Petru Ilea
- Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj Napoca, Romania
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Pourghahramani P, Akhgar B. Influence of mechanical activation on the reactivity of natural pyrite in lead (II) removal from aqueous solutions. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.10.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Pourghahramani P, Akhgar B. Characterization of structural changes of mechanically activated natural pyrite using XRD line profile analysis. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.minpro.2014.11.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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