Article
Materials Science, Multidisciplinary
Hongpeng Zheng, Li Liu, Fandi Meng, Yu Cui, Zhong Li, Emeka E. Oguzie, Fuhui Wang
Summary: This study focuses on developing easy-to-apply superhydrophobic coatings with multifunctional capabilities to extend the integrity and durability of the coatings in harsh marine environments. By using selective chemical etching and fluorination methods, a superhydrophobic surface with the required structure and low surface energy was fabricated on basalt scales for large surface area applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Seung Yong Baek, Alexander Efremov, Alexander Bobylev, Gilyoung Choi, Kwang-Ho Kwon
Summary: In this study, we investigated the impact of component ratios on various aspects of plasma characteristics, chemistry of active species, and silicon etching kinetics in CF4 + O-2, CHF3 + O-2, and C4F8 + O-2 gas mixtures. The results showed that the addition of O-2 significantly altered the plasma parameters, suppressed the densities of CFx radicals, and influenced the kinetics of F atoms. Furthermore, the dominant Si etching mechanism was found to be the chemical interaction with F atoms, which is characterized by a nonconstant reaction probability reflecting the presence of fluorocarbon polymer and oxidation of the silicon surface.
Article
Multidisciplinary Sciences
Hugo Hartl, Joseph Davies, Geoffrey Will, Kostya Ostrikov, Jennifer MacLeod
Summary: This study presents a new method for directly fabricating a superhydrophobic surface coating on mild steel. Dielectric barrier discharge (DBD) plasma was used to convert a liquid small-molecule precursor to a solid film through plasma-assisted on-surface polymerization. The properties of the coating were analyzed using various techniques, including microscopy, spectroscopy, and contact angle measurement. The results showed that the wettability of the films could be controlled by adjusting the plasma parameters and incorporating graphene nanoplatelets in the precursor. High-dose plasma exposures of the nanoplatelet-containing precursor resulted in the formation of superhydrophobic films with water contact angles above 150 degrees. However, the superhydrophobic coating provided limited corrosion protection according to potentiodynamic polarisation tests.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Arpan Hazra, Satyanarayana Bonakala, Stephen Adie Adalikwu, Sundaram Balasubramanian, Tapas Kumar Maji
Summary: The synthesis and structural characterization of a photoresponsive fluorinated MOF for selective capture of CO2 in the presence of water vapor was reported. The material exhibited superhydrophobicity and ability to transform into a new framework structure through a cycloaddition reaction, leading to increased CO2 uptake capacity.
INORGANIC CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Mac Kim, Sung Hyun Kim, Yecheol Rho, Eunmi Cho, Jae Heung Lee, Sang-Jin Lee
Summary: Highly transparent and flexible Cu-plasma-polymerized fluorocarbon (PPFC) nanocomposite thin films with hydrophobicity and antistatic properties were proposed, showing excellent mechanical robustness and fatigue resistance. These films have potential applications in various industries such as flexible displays, medical, automobiles, functional textiles, and aerospace.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Coatings & Films
Ben Pace, Avi Bendavid, Mohammed Ahsan, Matthew Dargusch, Vijay Bhatia, Jacob Byrnes, Julie Cairney
Summary: By treating the substrate surface using ultrasonication or plasma-based etching, the microstructure and properties of thick tantalum films on NiTi wires can be significantly controlled. This optimization allows for influencing bulk properties such as cohesive and shear strength, ductility, conductivity, and cohesion in thick tantalum coatings.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Physics, Applied
Vivek Pachchigar, Umesh K. Gaur, T. Amrutha, K. P. Sooraj, Sukriti Hans, Sanjeev K. Srivastava, Mukesh Ranjan
Summary: This study investigated the effects of Ar plasma treatment on the surface properties of polytetrafluoroethylene (PTFE). It was found that a superhydrophobic surface could be achieved with specific treatment conditions, but prolonged treatment led to a hydrophilic surface. X-ray photoelectron spectroscopy analysis confirmed the formation of a yellowish layer on the surface, which was attributed to crosslinking, redeposition of fluorocarbon species, and iron impurities in the plasma system.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Nanoscience & Nanotechnology
Fabian Kaufmann, Giovanni Finco, Andreas Maeder, Rachel Grange
Summary: Lithium niobate on insulator is becoming a versatile platform for new photonic integrated devices. Progress has been made to improve the fabrication of optical circuits on a large scale, and the performance has reached remarkable levels. However, the argon etching process is still challenging to optimize due to micro-masking effects and low etch mask selectivity. A workflow is presented to identify the best etching results, and three methods are proposed to achieve redeposition-free lithium niobate etching with good sidewall quality without the need for wet chemistry.
Article
Materials Science, Coatings & Films
Xinglei Cui, Zhenbo Xu, Yangyang Zhou, Xi Zhu, Sen Wang, Zhi Fang
Summary: This study demonstrates that a superhydrophobic film can be deposited on the ceramic surface under appropriate treatment conditions, and further investigates the hydrophobicity of the film.
SURFACE & COATINGS TECHNOLOGY
(2022)
Review
Biotechnology & Applied Microbiology
Shangjie Ge-Zhang, Hong Yang, Haiming Ni, Hongbo Mu, Mingming Zhang
Summary: As an emerging fringe science, bionics integrates the understanding of nature, imitation of nature, and surpassing nature in one aspect. Bionic superhydrophobic surface, prepared by imitating the microstructure of a natural biological surface, has the properties of self-cleaning, anti-icing, water collection, anti-corrosion, and oil-water separation. The etching modification method, which directly modifies the substrate, shows advantages of integrated surface stability and corrosion resistance.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Won-nyoung Jeong, Young-seok Lee, Chul-hee Cho, In-ho Seong, Shin-jae You
Summary: The etching characteristics of SiO2 were investigated, and a process window was identified. By adjusting the pulse-off time, the etching depth could be enhanced or reduced, depending on the radical flux.
Article
Materials Science, Paper & Wood
Md Ibrahim H. Mondal, Joykrisna Saha
Summary: C6-fluorocarbon-dendrimer has been applied to cotton knit fabric to develop multifunctional properties, such as water repellency, oil-water separation, acid resistance, self-cleaning, UV resistance, and antibacterial properties.
Article
Chemistry, Physical
Qi Zhao, Yixin Guo, Chun He, Feipeng Wang, Jian Li
Summary: This paper investigates the secondary electron emission (SEE) behavior of fluorocarbon (FC) films based on theoretical analysis and numerical calculations. It finds that the electron affinity (EA) and energy difference between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) are influenced by the fluorine to carbon (F/C) ratio. The electron capture capacity is enhanced with increasing F/C ratio. The SEE behavior is affected by the chemical composition and island-like nanostructure of the FC films. The growth process is divided into two stages, with roughening and smoothing effects playing dominant roles. Increasing sputtering time leads to higher film thickness, larger surface roughness, and larger F/C ratio. Experimental results show that the SEY decreases with increased film thickness and aging.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Hyunjin Park, Hyemin Kim, Sung Hyun Kim, Eunmi Cho, Han-Ki Kim, Sang-Jin Lee
Summary: In this study, a transparent and flexible heater using PPFC/Ag bilayer thin films was successfully fabricated. The bilayer thin film structure improved the optical transmittance while simplifying the process. The optimized bilayer thin film exhibited good performance and can be used in flexible and rollable devices to prevent frosting and fogging.
Article
Engineering, Multidisciplinary
Junchi Chen, Shudong Yu, Ting Fu, Liang Xu, Yong Tang, Zongtao Li
Summary: The kapok petal exhibits superhydrophobic characteristics due to densely distributed microscale trichomes with a reentrant curvature, unlike other natural superhydrophobic surfaces with hierarchical morphologies. The petal's self-cleaning ability is excellent, and the proposed mechanism suggests potential applications in various fields.
BIOINSPIRATION & BIOMIMETICS
(2022)
Article
Materials Science, Coatings & Films
Yanchun Xie, Xiaodong Wang, Shenshen Cui, Jiali Hu, Yongcun Wei, Yi Lian, Anwu Xuan, Bin Yu, Erlin Zhang
Summary: In this study, Ti-xFe (x = 3,5,9 wt%) alloys were surface modified by micro-arc oxidation (MAO) to improve their antimicrobial properties and biocompatibility. The results showed that increasing the oxidation voltage greatly enhanced the roughness and hydrophilicity of Ti-xFe-MAO alloys. The Ti-xFe alloys micro-arc oxidized at 250 V and 300 V exhibited improved corrosion resistance and excellent antimicrobial and cytocompatibility properties, making them suitable for orthopedic implant materials.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuting Hao, Zuoyan Ye, Lili Wang, Minheng Ye, Hui Dong, Chao Wang, Yunchen Du
Summary: This study focuses on the modification of PEO coatings on Ta-12W alloy using NH4F additive. The results show that ultra-low porosity coatings can be prepared by optimizing the NH4F content. The formation process of specific structures on the coating surface is discussed, and the effects of NH4F concentration and treatment duration on coating characteristics are investigated.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuanzhuo Liu, Linjiang Chai, Tao Yang, Chaodan Hu, Chuanmei Wang, Guoqiang Xi
Summary: By employing a pulsed laser, laser cladding was performed on IN718 alloy pre-coated with CrCoNi-TiC/SiC powders and three defect-free coatings were successfully prepared. The addition of TiC and SiC powders generated fine carbides dispersed in the coatings and led to changes in grain and substructure morphologies, resulting in increased hardness and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
M. Ghaemi, A. Lopez-Cazalilla, K. Sarakinos, G. J. Rosaz, C. P. A. Carlos, S. Leith, S. Calatroni, M. Himmerlich, F. Djurabekova
Summary: The use of high-power impulse magnetron sputtering can result in dense and uniform niobium films on all surfaces of superconducting rf cavities, as simulated and investigated in this study.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Jiaheng Du, Xinli Fan, Dongqin Xiao, Wuxiang Wang, Yiran Yin, Zhong Li, Kui He, Yanfei Tan, Jiyuan Yan, Gangli Liu, Ke Duan
Summary: This study investigated the electrophoretic deposition (EPD) of magnesium oxide (MgO) coatings on micro-arc oxidized titanium (MAO-Ti) and evaluated their in vitro antibacterial properties and biocompatibility. The results showed that MgO coatings significantly reduced bacterial numbers and biofilm formation, while also demonstrating good cytocompatibility and induction of osteoblast mineralization.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Samiksha Moharana, Yuichi Otsuka, R. Gnanamoorthy
Summary: The addition of titania to HAp coatings improves their wear resistance and reduces damage to titanium implants caused by debris generation. This study evaluates the fretting wear resistance of titania-added HAp suspension plasma spray coating and finds that it exhibits reduced friction coefficient and increased wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Li-Ping Wu
Summary: The functional hazenite coating deposited on AZ31 Mg alloy showed improved roughness and hydrophilicity, enhanced biocompatibility, reduced degradation rate, and decreased susceptibility to stress corrosion cracking.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Ning Tian, Delei Xu, Jinfei Wei, Bucheng Li, Junping Zhang
Summary: This study reports the preparation of a superhydrophobic and anti-bacterial fabric for face masks. The fabric exhibits high superhydrophobicity and excellent moisture resistance, enabling functionality effectiveness in cold weather conditions. The fabric also demonstrates remarkable anti-bacterial activity against E. coli, attributed to the synergistic effect of superhydrophobicity and embedded ZnO nanoparticles. This superhydrophobic anti-bacterial fabric holds great potential for various practical applications in personal protective equipment, healthcare, and disease prevention.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Katharina Beck, Anke S. Ulrich, Andreas K. Czerny, Emma M. H. White, Martin Heilmaier, Mathias C. Galetz
Summary: Refractory metal based alloys have great potential as structural materials for high-temperature applications due to their high melting points. However, they are prone to catastrophic oxidation at around 700 degrees C. This study investigated the effect of aluminium diffusion coatings on the oxidation resistance of pure molybdenum, niobium, tantalum, and tungsten. The results showed that the aluminization improved the oxidation behavior and decreased the oxide growth rate for molybdenum and tantalum.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Wenwen Shuai, Haijun Dou, Zhichen Guan, Wei Qian, Zhibao Li, Yinqun Hua, Jie Cai
Summary: This study synthesized (Y1-xLax)3Al5O12 (x = 0, 0.1, 0.2, 0.3) materials by doping lanthanum ions, and found that the doped materials exhibited improved mechanical properties and thermal expansion coefficient, as well as enhanced resistance to CMAS corrosion. These materials have potential applications.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Xianglei Liu, Jiahui Ding, Wanbo Hou, Xinhao Shi, Tao Feng, Xiangyuan Meng, Shifeng Wen, Mingde Tong, Zhufeng Yue
Summary: A composite coating was developed to improve the adhesion, wear resistance, and corrosion resistance, which exhibited significant enhancements in these properties.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hongxuan Xing, Jidong Li, Xianwei Hu, Liang Tian, Renyun Zhang, Yiyong Wang
Summary: By depositing a Cu/Co-Mo corrosion-resistant plating layer on the surface of 6061 Al alloy, the bonding strength between the alloy and the plating layer can be improved and the corrosion resistance can be enhanced. The composite coating forms an obvious three-layer structure with Co-Mo coating exhibiting amorphous characteristics and Co3Mo phase composition. The composite coating improves the corrosion resistance and hardness of the substrate, effectively protecting the 6061 Al alloy.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Fan Yang, Debin Wang, Tianrun Li, Baijun Yang, Suode Zhang, Jianqiang Wang
Summary: The impact-corrosion behavior of monolayer and hierarchical Fe-based amorphous coatings fabricated by HVAF was investigated in 3.5 wt% NaCl solution. The monolayer coating exhibits corrosion failure with increased impact energy, while the hierarchical coating shows improved resistance. However, at high impact energies, both coatings experience corrosion degradation.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Shoaib Ahmad, Muddasir Nawaz, Solaiman Mohammad, R. A. Shakoor, Ramazan Kahraman, Talal Mohammed Al Tahtamouni
Summary: This research presents a novel self-healing anti-corrosion composite coating that demonstrates higher inhibition efficiency and self-healing effect, providing protection for metallic structures against corrosive environments.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hui-Wen Peng, Chun-Hway Hsueh
Summary: A series of (CoCrNi)100-x-ySixNdy medium entropy alloy films with manipulated metalloid element, Si, and rare earth element, Nd, were synthesized using magnetron three-target co-sputtering. The films showed different structures and mechanical properties with varying Si and Nd contents. The optimized mechanical properties were observed in the film with Si0.61Nd5.14, attributed to precipitation strengthening and grain refinement.
SURFACE & COATINGS TECHNOLOGY
(2024)