Wetting and corrosion properties of CuxOy films deposited by magnetron sputtering for maritime applications

Castro, José D.; Lima, Mário; Carvalho, S.

doi:10.1016/j.apsusc.2022.152582

Cited by 9 publications

(3 citation statements)

References 47 publications

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“…An ideal antifouling agent must develop sufficient antifouling activity while imposing the least amount of hazardous effect on the maritime organisms that inhabit the surrounding environments of submerged surfaces. Different types of recently developed antifouling coatings that are utilized to prevent medical fouling [54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69] and maritime/environmental fouling [70][71][72][73][74][75][76][77][78][79][80][81][82] are listed in Table S2.…”

Section: Synthetic Antifouling Strategies and Toxicities Associated W...mentioning

confidence: 99%

New Insights on Biological Activities, Chemical Compositions, and Classifications of Marine Actinomycetes Antifouling Agents

Morgan,

Ali,

Alshahrani

et al. 2023

Microorganisms

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Biofouling is the assemblage of undesirable biological materials and macro-organisms (barnacles, mussels, etc.) on submerged surfaces, which has unfavorable impacts on the economy and maritime environments. Recently, research efforts have focused on isolating natural, eco-friendly antifouling agents to counteract the toxicities of synthetic antifouling agents. Marine actinomycetes produce a multitude of active metabolites, some of which acquire antifouling properties. These antifouling compounds have chemical structures that fall under the terpenoids, polyketides, furanones, and alkaloids chemical groups. These compounds demonstrate eminent antimicrobial vigor associated with antiquorum sensing and antibiofilm potentialities against both Gram-positive and -negative bacteria. They have also constrained larval settlements and the acetylcholinesterase enzyme, suggesting a strong anti-macrofouling activity. Despite their promising in vitro and in vivo biological activities, scaled-up production of natural antifouling agents retrieved from marine actinomycetes remains inapplicable and challenging. This might be attributed to their relatively low yield, the unreliability of in vitro tests, and the need for optimization before scaled-up manufacturing. This review will focus on some of the most recent marine actinomycete-derived antifouling agents, featuring their biological activities and chemical varieties after providing a quick overview of the disadvantages of fouling and commercially available synthetic antifouling agents. It will also offer different prospects of optimizations and analysis to scale up their industrial manufacturing for potential usage as antifouling coatings and antimicrobial and therapeutic agents.

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Section: Synthetic Antifouling Strategies and Toxicities Associated W...mentioning

confidence: 99%

New Insights on Biological Activities, Chemical Compositions, and Classifications of Marine Actinomycetes Antifouling Agents

Morgan,

Ali,

Alshahrani

et al. 2023

Microorganisms

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“…Due to this surface oxidation, diffusion of Cu atoms is inhibited considerably, and conductive properties are affected significantly. In addition to CuO and Cu 2 O, other research has discovered crystalline metaphase formations such as Cu 8 O and Cu 64 O [25][26][27]. Therefore, it is highly important to control sintering process parameters to prevent oxidation of the surface of Cu NPs.…”

Section: Introductionmentioning

confidence: 99%

Effect of dual sintering with laser irradiation and thermal treatment on printed copper nanoparticle patterns

Chowdhury,

Young,

Poche

et al. 2023

Nanotechnology

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The dual sintering of copper (Cu) nanoparticles (NPs) was introduced to produce conductive patterns suitable for flexible electronics applications. In this method, laser irradiation using a Nd:YAG laser with a wavelength of 1064 nm was performed at laser powers of 400, 600, and 800 mJ. The laser irradiation time was 15 and 30 s for each laser power. After laser irradiation, all of the Cu NP patterns were thermally sintered under formic acid (FA) vapors. The temperature and time for thermal sintering were selected as 260 °C and 15 min, respectively. The resultant physical, chemical, electrical and mechanical properties were evaluated and compared considering the six different dual sintering conditions. The Cu NP patterns sintered using 800 mJ for 30 s showed increased necking and coalescence compared to the other patterns and featured a microstructure with increased density. Despite being oxidized, the Cu NP patterns sintered with 800 mJ for 30 s showed the lowest electrical resistivity of 11.25 μΩ·cm. The surface of every sintered Cu pattern was oxidized, and mechanical hardness increased with increasing laser power. The Cu NP pattern sintered with 800 mJ for 30 s demonstrated the highest hardness of 48.64 N/mm2. After sintering using the six different conditions, the Cu NP patterns exhibited a weight loss of 0.02-3.87 wt%, and their roughness varied in the range of 26.15-74.08 nm. This can be attributed to the effective removal of organic residues and the degree of particle agglomeration. After performing folding tests up to 50 cycles, Cu NP patterns showed an upward trend in resistance with increasing laser power and time. The highest and lowest resistance ratios were observed as 3.97 and 17.24 for the patterns sintered at 400 mJ for 15 s and 800 mJ for 30 s, respectively.

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“…In order to understand surface corrosion kinetics, bulk direct current (DC) and alternating current (AC) electrochemical techniques such as Tafel polarization and electrochemical impedance spectroscopy (EIS) have been widely used . Additionally, advanced microspectroscopy techniques (e.g., SEM, EBSD, AFM, XPS, and TEM) are utilized to characterize the physical and chemical properties of the surface pre- and postcorrosion and are often used to corroborate the electroanalytical results. − Combining the insights from experimental techniques such as bulk electrochemical measurements and highly resolved microspectroscopy with theoretical modeling leads to insights on the structure–function relationship between electrochemical corrosion kinetics and surface characteristics, and eventually lead to the development of corrosion-resistant materials.…”

Section: Introductionmentioning

confidence: 99%

Understanding Localized Corrosion on Metal Surfaces Using Scanning Electrochemical Cell Impedance Microscopy (SECCIM)

et al. 2022

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Understanding the electrochemical properties at a localized scale is critically important to comprehend the origin of corrosion and develop multifunctional materials with robust corrosion resistance, particularly at conjoined metal interfaces typically encountered in automobile manufacturing. Scanning electrochemical cell microscopy (SECCM) is an emerging technique which enables to study the corrosion of metal surfaces to be visualized at the microscopic level. In this work, we developed scanning electrochemical cell impedance microscopy (SECCIM) by combining SECCM with electrochemical impedance spectroscopy (EIS) and explored the unique advantages of using SECCIM to measure the corrosion kinetics on single-crystal Mg (0001) as the model surface using direct current and alternating current polarization techniques. Specifically, a theta capillary with a tip diameter of 10 μm filled with a 0.01 M NaCl electrolyte was used as a probe to perform spatially resolved potentiodynamic Tafel polarization and EIS. The combination of traditional SECCM with EIS led to the development of SECCIM and enabled us to study small interfacial events such as charge transfer, adsorption, and emergence of resistive oxide films on the surface using the distribution of relaxation time analysis. Furthermore, by comparing localized SECCIM measurements with bulk electrochemical measurements, we establish the reliability of SECCIM for the mapping of corrosion potential and associated charge-transfer resistance on the Mg (0001) surface. Our results indicate that SECCIM measurement with Tafel and EIS analysis will provide an unparalleled ability to characterize the pitting corrosion mechanism on the heterogeneous surface of mixed-metal alloys and metal joints.

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Wetting and corrosion properties of CuxOy films deposited by magnetron sputtering for maritime applications

Cited by 9 publications

References 47 publications

New Insights on Biological Activities, Chemical Compositions, and Classifications of Marine Actinomycetes Antifouling Agents

New Insights on Biological Activities, Chemical Compositions, and Classifications of Marine Actinomycetes Antifouling Agents

Effect of dual sintering with laser irradiation and thermal treatment on printed copper nanoparticle patterns

Understanding Localized Corrosion on Metal Surfaces Using Scanning Electrochemical Cell Impedance Microscopy (SECCIM)

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