Article
Materials Science, Multidisciplinary
Elias Kaady, Syreina Sayegh, Mikhael Bechelany, Roland Habchi, Akram Alhussein
Summary: The effect of carbon insertion using CH4 gas flow as the carbon precursor in magnetron sputtering on the mechanical and electrochemical properties of CrN coatings, as well as the influence of Al2O3-ZnO nanolaminates sealing layers deposited by ALD on distinctive CrCN sputtered coatings, were investigated. Structural, morphological, and topographical analyses were conducted to examine the coatings. Nanoindentation measurements determined the mechanical properties and electrochemical behavior was evaluated. The study provides new insights in the field of duplex treatment based on hybrid deposition techniques.
Article
Materials Science, Multidisciplinary
Elias Kaady, Akram Alhussein, Mikhael Bechelany, Roland Habchi
Summary: This study aims to develop coatings for improving the corrosion resistance of 316L stainless steel in chlorinated environments through a combination of PVD and ALD techniques. The PVD/ALD/PVD architecture was found to be the most efficient in providing corrosion resistance improvement.
Article
Multidisciplinary Sciences
Marcin Staszuk, Daniel Pakula, Lukasz Reimann, Malgorzata Musztyfaga-Staszuk, Robert Socha, Tomasz Tanski
Summary: This study investigates the corrosion resistance and tribological properties of ultra-light magnesium alloys through the application of Ti/Al2O3 + TiO2 and Ti + TiO2/Al2O3 + TiO2 coatings obtained via a hybrid PVD and ALD process. The results show that the hybrid coatings exhibit improved corrosion resistance and tribological properties compared to uncoated substrates.
SCIENTIFIC REPORTS
(2022)
Article
Nanoscience & Nanotechnology
Janne-Petteri Niemela, Barbara Putz, Gustavo Mata-Osoro, Carlos Guerra-Nunez, Remo N. Widmer, Nadia Rohbeck, Thomas E. J. Edwards, Max Doebeli, Krzysztof Mackosz, Aleksandra Szkudlarek, Yury Kuzminykh, Xavier Maeder, Johann Michler, Bernhard Andreaus, Ivo Utke
Summary: This study investigates the mechanical properties of atomic layer-deposited coatings and proposes a method to control the fracture onset strain. The results show that the layer structure and composition can be manipulated to tailor the fragmentation onset of the coatings. It is also found that the intrinsic residual stress of Y2O3 coatings is a disadvantage for applications with applied tensile stresses, while the insertion of an Al2O3 layer at the film/substrate interface can enhance the interface toughness. Additionally, the high-temperature behavior of the coatings is studied, revealing good temperature tolerance.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Coatings & Films
Xiaoyan Guan, Haorong Shi, Meiyan Zhao, Guangan Zhang, Yiwei Cao
Summary: Due to growth defects, the CrN coating-substrate system is vulnerable to corrosion and wear attack in a marine environment. A new approach of fabricating Al2O3/CrN duplex coatings was introduced to improve the efficiency and achieve excellent corrosion and wear performances. The duplex coatings were obtained by combining multi-arc ion plating system sputter CrN layers with sequential atomic layer deposition Al2O3 layers. The corrosion resistance and tribological properties of the duplex coatings were investigated in a seawater environment. The results showed that the Al2O3/CrN duplex coatings exhibited superior corrosion resistance and reduced wear rate compared to single CrN coatings.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Electrochemistry
Ivan Spajic, Ehsan Rahimi, Maria Lekka, Ruben Offoiach, Lorenzo Fedrizzi, Ingrid Milosev
Summary: Thin films of alumina and hafnia prepared by atomic layer deposition show excellent barrier properties for biomedical applications, with protection mainly dependent on film thickness and substrate type, rather than configuration. Further investigation is warranted for these single and multilayer thin films.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Jinxin Fan, Yuan Tian, Cheng Wang
Summary: In this study, three-dimensional mullite sheets were fabricated and used as interlayers in lithium metal batteries to regulate lithium deposition and suppress dendrite growth and dead lithium accumulation, leading to improved battery performance.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Coatings & Films
P. C. Lin, K. F. Lin, C. Chiu, V. Semenov, H. C. Lin, M. J. Chen
Summary: ALPT technique enhances the corrosion protection of TALD-ZrO2 film by increasing crystallinity and reducing oxygen defects, with the best result achieved at 30s treatment time.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Xuan Minh Chau Ta, Thanh Tran-Phu, Jodie A. Yuwono, Thi Kim Anh Nguyen, Anh Dinh Bui, Thien N. Truong, Li-chun Chang, Elena Magnano, Rahman Daiyan, Alexandr N. Simonov, Antonio Tricoli
Summary: In this study, the authors improved the stability and catalytic activity of low-cost Co3O4 anodes by depositing dielectric nanoscale-thin oxide layers, including Al2O3, SiO2, TiO2, SnO2, and HfO2, through atomic layer deposition. The results demonstrated that the HfO2 layer had the best performance, increasing the durability of the Co3O4 anode over threefold.
Article
Metallurgy & Metallurgical Engineering
Mirco Peron, Susanna Cogo, Maria Bjelland, Abdulla Bin Afif, Anup Dadlani, Elisa Greggio, Filippo Berto, Jan Torgersen
Summary: The study investigates the corrosion behavior and biological response of ALD TiO2, HfO2, and ZrO2 coatings on AZ31 alloy. Results indicate improved corrosion resistance and cytotoxicity of all three coatings, with HfO2 showing the highest performance in terms of corrosion resistance and cell viability.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Coatings & Films
Luciana Mendes Ribeiro de Sousa, Moises das Virgens Santana, Bruno Pereira da Silva, Thays Oliveira Marques, Ramon Pena-Garcia, Angel Alberto Hidalgo, Maria Leticia Vega, Bartolomeu Cruz Viana, Thiago Domingues Stocco, Luana Marotta Reis de Vasconcellos, William Chiappim, Rodrigo Savio Pessoa, Fernanda Roberta Marciano, Anderson Oliveira Lobo
Summary: By using Atomic Layer Deposition (ALD) and simulated body fluid method, Ti6Al7Nb alloy was modified with Al2O3 and coated with apatite. Various techniques including X-Ray Fluorescence (FRX), Energy Scattering X-Ray Spectroscopy (EDS), Scanning Electron Microscopy (SEM), X-Ray Diffraction Spectroscopy (XRD), Raman Spectroscopy, and Atomic Force Microscopy (AFM) were used to determine the chemical and crystallographic composition of Ti6Al7Nb before and after surface modifications. The results showed that the surface modifications improved the bioactivity of the titanium alloy by promoting the formation of microporosity and influencing the nucleation of apatite at the nanoscale. These nanofilms were found to be non-cytotoxic, making them promising for tissue engineering applications.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Thomas Lange, Sven Reichenberger, Markus Rohe, Mathias Bartsch, Laura Kampermann, Julian Klein, Jennifer Strunk, Gerd Bacher, Robert Schloegl, Stephan Barcikowski
Summary: The research reports the complete photostabilization of individual ZnS particles by a dense and durable Al2O3 layer produced by atomic layer deposition. This technology prevents ZnS from corrosive decomposition during UV irradiation, significantly expanding its potential applications.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jordan D. Levine, Alex Q. Rosen, Tawney A. Knecht, Darren W. Johnson
Summary: Hydrophobic coatings were successfully prepared on cotton fabrics using a solution deposition and photo-assisted anneal method. The coatings exhibited low surface roughness and high uniformity, as confirmed by SEM imaging and elemental analysis. This method is robust, scalable, and environmentally benign, making it suitable for industrial processes.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Mihaela Dinu, Kaiying Wang, Emile S. Massima Mouele, Anca C. C. Parau, Alina Vladescu (Dragomir), Xinhua Liang, Viorel Braic, Leslie Felicia Petrik, Mariana Braic
Summary: The potential of enhanced corrosion resistance of Ti(N,O) cathodic arc evaporation-coated 304L stainless steel using oxide nano-layers deposited by atomic layer deposition (ALD) was explored in this study. Al2O3, ZrO2, and HfO2 nanolayers of two different thicknesses were deposited onto Ti(N,O)-coated 304L stainless steel surfaces by ALD. The anticorrosion properties of the coated samples were investigated using XRD, EDS, SEM, surface profilometry, and voltammetry. The amorphous oxide nanolayers exhibited lower roughness after corrosion attack and the thickest oxide layers showed the best corrosion resistance. The thicker oxide nanolayers enhanced the corrosion resistance of the Ti(N,O)-coated stainless steel in a saline, acidic, and oxidising environment, which is important for corrosion-resistant housings in advanced oxidation systems.
Article
Chemistry, Physical
Hou-Jen Chen, Ying-Chu Chen, Pi-Chen Lin, Kaifan Lin, Jonathan C. Lin, Miin-Jang Chen, Hsin-Chih Lin
Summary: In this study, atomic layer deposition (ALD) techniques were used to deposit HfO2, ZrO2, TiO2, and Al2O3 thin films on AMC reinforced with 20 vol.% SiC particles. The ALD-deposited films effectively enhance the corrosion resistance of these composites, with the HfO2 film showing the most significant reduction in corrosion current density.
Article
Materials Science, Multidisciplinary
Jeongyeon Lee, Yoonbin Kim, Soyong Park, Kang Ho Shin, Gun Jang, Min Jun Hwang, Daekyu Kim, Kyung-Ah Min, Ho Seok Park, Byungchan Han, Dennis K. P. Ng, Lawrence Yoon Suk Lee
Summary: In this study, researchers utilized polymeric disodium phthalocyanines (pNaPc) as anode materials for sodium-ion batteries, providing stable coordination sites for Na ions and enhancing stability at high current density. By varying the linker type, two pNaPc anodes with O- (O-pNaPc) and S-linkers (S-pNaPc) were prepared, and their structural and electrochemical properties were investigated. O-pNaPc showed improved redox kinetics and cycle stability, allowing the fabrication of a full cell with high energy density (288 Wh kg(-1)) and high power density (149 W kg(-1)) when coupled with Na3V2(PO4)(2)F-3/C cathode.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sukhwa Hong, Kahyun Ham, Jeemin Hwang, Sinwoo Kang, Min Ho Seo, Young-Woo Choi, Byungchan Han, Jaeyoung Lee, Kangwoo Cho
Summary: In this study, a highly efficient and stable oxygen evolution reaction (OER) electrocatalyst is developed by using scalable solution casting method to deposit doped nanoparticles on Ni foam. Advanced X-ray absorption spectroscopy and density functional theory calculations reveal the changes in catalytic active sites, providing new insights for precious-metal doped Ni-Fe oxide electrocatalysts.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Woo-Jae Lee, Se-Hun Kwon
Summary: Ultrathin films or particles of atomic layer deposition (ALD) on high surface can improve the activity and durability of catalyst fields. In this study, a Pt catalyst is synthesized through ALD on carbon black whose surface is modified through treatment with citric acid. The acid-treated carbon exhibits rich oxidized functional groups and abundant defects but lower surface areas and pore volumes. After ALD Pt deposition, highly dense, uniform, and well-dispersed Pt nanoparticles (NPs) are observed on the acid-treated carbon, resulting in improved electrochemical activity and PEMFC performances.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Suseong Hyun, Hoje Chun, Minjoon Hong, Joonhee Kang, Byungchan Han
Summary: In this study, we designed ultrafast diffusion channels for Li ions through optimal aliovalent doping (Fe2+) of the halide electrolyte with a chloride framework, solving the issue of slow Li+ diffusion even in advanced halide-type electrolytes. The proposed material exhibits high chemical stability and high Li-ion conductivity, providing a new direction for research in electrolyte field.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Hyun Woo Park, Eunyeong Cho, Yun Zou, Sea Hoon Lee, Jae Ryung Choi, Sang-Bok Lee, Kyeongwoon Chung, Se Hun Kwon, Jeonghun Kim, Hee Jung Lee
Summary: Yttria-stabilized zirconia (YSZ) nanospheres were synthesized by calcination after adsorbing Y3+ ions into the pores of a zirconium-based metal-organic framework (MOF). The synthesized 3YSZ, 8YSZ, and 30YSZ nanospheres showed uniform sizes and shapes. Complex permittivity and permeability measurements in the K-band indicated that these materials have potential for use as low-k materials in high-frequency 5G communications.
Article
Nanoscience & Nanotechnology
Su-Young Park, Jung-Won An, Ji-Hu Baek, Hyun-Jae Woo, Woo-Jae Lee, Se-Hun Kwon, Susanta Bera
Summary: This study evaluates the activity and stability of in situ crystallized antimony-doped tin oxide (Sb-SnO2)@RuOx heterostructure nanosheets (NSs) for acidic water oxidation. The catalyst prepared by atomic layer deposition and heat treatment exhibits comparable activity but longer stability than the ex situ catalyst. The controlled interface stability of heterostructure catalysts plays a significant role in enhancing oxygen evolution reaction (OER) activity and stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Editorial Material
Chemistry, Physical
Han-Bo-Ram Lee, Seiyon Kim
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Yujin Lee, Kangsik Kim, Zonghoon Lee, Hong-Sub Lee, Han-Bo-Ram Lee, Woo-Hee Kim, Il-Kwon Oh, Hyungjun Kim
Summary: In this study, Dy incorporation was used to stabilize HfO2 films and increase the grain size, which resulted in a reduction of leakage current density and an increase in breakdown strength. The properties of Dy-doped HfO2 thin films were characterized using various analysis techniques. The phase transformation of HfO2 films from different planes to a main m(-111) plane was observed through X-ray diffraction, indicating the role of Dy in stabilizing the film. The increase in grain size due to Dy incorporation was confirmed by electron microscopy.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhengtao Wu, Yintuan Zhang, Qimin Wang, Kwang-Ho Kim, Se-Hun Kwon
Summary: The microstructure and properties of WTi alloy films with different contents of Ti prepared by magnetron sputtering were investigated. The electrical resistivity increased with the increase in Ti content. The alloy film with 6.8 at.% Ti showed the highest temperature coefficient of resistance, which decreased gradually after thermal resistance tests and annealing treatment. The WTi films exhibited excellent stability in thermal resistance tests and have potential applications in temperature measurement of tools and dies.
APPLIED SCIENCES-BASEL
(2023)
Article
Nanoscience & Nanotechnology
Min-Ji Kim, Jong-Seong Bae, Myung-Jin Jung, Eunsong Jeon, Yiseul Park, Hasmat Khan, Se-Hun Kwon
Summary: Defect control in TiO2 thin films is challenging but crucial for improving photoelectrochemical (PEC) efficiency in water splitting processes. In this study, defective amorphous TiOx thin films were prepared by atomic layer deposition (ALD) at various growth temperatures. The defect concentration in the films was found to be controllable by adjusting the growth temperature during ALD, as analyzed by X-ray photoelectron spectroscopy and electron spin resonance spectroscopy. The light absorption properties of the films were characterized using ultraviolet-visible absorption spectroscopy. The film deposited at 200 degrees C exhibited the highest defect concentration and photocurrent density compared to other films. By carefully studying the light absorption efficiency, photogenerated charge separation efficiency, and charge transfer efficiency, the correlation between defect concentration and PEC activity in the prepared TiOx thin films was understood. This study provides insights into the PEC properties of defective amorphous ALD-TiOx thin films.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Chi Thang Nguyen, Eun-Hyoung Cho, Ngoc Le Trinh, Bonwook Gu, Mingyu Lee, Sunghee Lee, Jeong-Yub Lee, Youngho Kang, Han-Bo-Ram Lee
Summary: Area-selective deposition (ASD) using a precursor inhibitor (PI) has the potential to replace self-assembled monolayer inhibitors due to its wide material selection and process compatibility. This study introduces bis(ethylcyclopentadienyl)ruthenium [Ru(EtCp)(2)] as a homometallic PI for ASD of Ru. The blocking property is determined by the packing density of Ru(EtCp)(2) on the surface, and an additional H2O pulse is used to create more space for adsorption of Ru(EtCp)(2), improving the blocking property. Ru(EtCp)(2) with an additional H2O pulse inhibits the growth of Ru atomic layer deposition (ALD) film for up to 300 cycles. This study highlights the possibility of using homometallic PIs in future metal ASD processes.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Coatings & Films
Sanghun Lee, Seunggi Seo, Woo-Jae Lee, Wontae Noh, Se-Hun Kwon, Il-Kwon Oh, Hyungjun Kim
Summary: The correlation between hydroxyl and the growth of ALD TiSiOx was investigated, and it was found that the presence or absence of hydroxyl at different temperatures leads to differences in growth characteristics.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Chemistry, Physical
Wonjae Lee, Hyebin Yun, Yongmin Kim, Sun Seo Jeon, Hoon Taek Chung, Byungchan Han, Hyunjoo Lee
Summary: Water electrolysis using anion exchange membranes holds promise for hydrogen production, and Ni-Mo catalysts have shown high activity for alkaline hydrogen evolution reaction. This study investigates their performance in a single-cell setup and reveals the significant impact of activation procedures on cell performance. The study also provides insights into the distribution of Mo, the surface structure, and the reaction mechanism, contributing to the development of efficient catalysts for large-scale hydrogen production.
Article
Materials Science, Multidisciplinary
Byung-Hyun Shin, Dohyung Kim, Doo-In Kim, Wookjin Lee, Se-Hun Kwon
Summary: The demand for Li-ion batteries has increased due to the growing need for electric vehicles and electronic devices. Super duplex stainless steel (SDSS) is suitable for Li-ion batteries due to its strength and corrosion resistance. This study focuses on Ni plating of heat-treated SDSS and finds that solution annealing can optimize the plating and enhance corrosion resistance.
Article
Nanoscience & Nanotechnology
See Wee Koh, Jie Hu, Hoje Chun, Peng Yu, Junyu Ge, Zixu Sun, Wei Hong, Qiunan Liu, Kyungju Nam, Byungchan Han, Zheng Liu, Hong Li
Summary: In this study, two-dimensional ternary palladium phosphoronitride (Pd3P2Nx) was synthesized for the first time for oxygen reduction reaction (ORR) catalysis, with a rational design guided by first-principles density functional theory calculations. The doping process significantly increased the mass activity of the palladium phosphorus sulfide compound and improved its kinetics and stability for ORR. The ORR diffusion-limited current density of Pd3P2Nx exceeded that of commercial Pt/C, showcasing fast kinetics and robust long-term stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
