Article
Materials Science, Coatings & Films
Petro Deminskyi, Chih-Wei Hsu, Babak Bakhit, Polla Rouf, Henrik Pedersen
Summary: The study introduced an ALD process for GaN deposition and demonstrated that adding a B-pulse improved the material quality and growth rate per ALD cycle of GaN deposition.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)
Article
Nanoscience & Nanotechnology
Azina Rahmani, Maksim A. Sultanov, Kemah Kamiru-White, Lorianne R. Shultz-Johnson, Brian E. Butkus, Shaohua Xie, Fudong Liu, Diep T. H. Nguyen, Noeimie Wilson-Faubert, Ali Nazemi, Parag Banerjee, Lei Zhai, Massimiliano Delferro, Jianguo Wen, Titel Jurca
Summary: Galvanic exchange and atomic layer deposition techniques were used to prepare ultralow loading Pt catalysts with high stability and recyclability. The catalysts showed high activity towards various functionalized styrenes and excellent tolerance towards substituents.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Nickolas Anderson, Soumya Saha, Gregory Jursich, Christos G. Takoudis
Summary: By utilizing different copper substrate materials and further optimizing the substrate treatment, the selectivity of zirconium oxide deposition can be significantly enhanced; the selectivity of ALD is mainly determined by the balance of the total amounts of oxygen and carbon in the reactor, as well as the ALD conditions and reactor design.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Nanoscience & Nanotechnology
Yujin Jo, Yong Tae Kim, Hoonsung Cho, Min-Kyung Ji, Jaeyeong Heo, Hyun-Pil Lim
Summary: The study aimed to create a uniform zirconia layer on complex structures using atomic layer deposition (ALD). The results showed that zirconia coatings via ALD reduced bacterial adhesion and increased osteoblast cell viability, indicating the potential for reducing peri-implantitis and improving osseointegration on implant surfaces.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2021)
Article
Chemistry, Physical
Selvaraj Seenivasan, Hyeonjung Jung, Jeong Woo Han, Do-Heyoung Kim
Summary: By converting the nanoshells of the electrocatalyst into active shell layers through controlled anion-exchange reactions, the surface active sites are increased, facilitating faster water splitting kinetics. The modulation of electron density induced by the nanoshell layer decreases overpotentials of electrodes, leading to improved reaction rates. In addition, the composite electrodes demonstrate good durability during industrial seawater electrolysis, maintaining stable electrochemical activity after continuous water splitting for 10 days.
Article
Nanoscience & Nanotechnology
Samuel S. Hardisty, Shira Frank, Melina Zysler, Reut Yemini, Anya Muzikansky, Malachi Noked, David Zitoun
Summary: The article discusses the issue of catalyst poisoning and presents a solution using V2O5 coating deposited through atomic layer deposition to protect Pt/C catalysts. The coating selectively enhances hydrogen transport to the Pt surface, resulting in higher mass activity in alkaline electrolytes and protection from harmful species like HBr/Br-2.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Marvin Frisch, Meng-Yang Ye, Muhammad Hamid Raza, Aleks Arinchtein, Denis Bernsmeier, Anna Gomer, Thomas Bredow, Nicola Pinna, Ralph Kraehnert
Summary: Metal carbides can be promising materials for electrocatalytic reactions such as water electrolysis. This study presents a new method for synthesizing porous tungsten carbide films surface-modified with nickel oxide, which demonstrates significantly improved OER catalytic activity in alkaline medium. The highly conductive carbide support promotes the conversion of Ni2+ into Ni3+, leading to outstanding mass-specific activity in the OER process.
Article
Biochemistry & Molecular Biology
Tatsuhide Hayashi, Masaki Asakura, Shin Koie, Shogo Hasegawa, Akimichi Mieki, Koki Aimu, Tatsushi Kawai
Summary: This study investigated the deposition of thin films of titanium dioxide (TiO2), aluminum oxide (Al2O3), silicon dioxide (SiO2), and zinc oxide (ZnO) on zirconia using atomic layer deposition (ALD), and evaluated the cell proliferation abilities on each sample. The results suggest that TiO2 deposition using ALD could be a promising surface modification procedure for zirconia dental implants.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Peng Zhai, Laibao Zhang, David A. Cullen, Divakar R. Aireddy, Kunlun Ding
Summary: The study demonstrates that the inverse design of metal-zeolite interfaces constructed by area-selective atomic layer deposition can effectively steer the selectivity of metal catalysts, offering a potential solution for the fabrication of task-specific metal-zeolite interfaces.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Iva Saric, Maria Kolympadi Markovic, Robert Peter, Petra Linic, Karlo Wittine, Ivna Kavre Piltaver, Ivana Jelovica Badovinac, Dean Markovic, Mato Knez, Gabriela Ambrozic
Summary: This study demonstrates the use of copper-free vapor phase azide-alkyne click reactions for functionalizing metal oxide nanopowders, automated with the atomic layer deposition (ALD) technique. The results show that the method can be used to construct functional organic layers on metal oxide surfaces, enhancing their stability and chemical properties.
APPLIED SURFACE SCIENCE
(2021)
Article
Polymer Science
Mahdi Bourassi, Magda Karaszova, Mariia Pasichnyk, Raul Zazpe, Jana Hercikova, Vlastimil Fila, Jan M. Macak, Jana Gaalova
Summary: The study compared different membranes for the adsorption and pertraction of ibuprofen, finding that tailor-made membranes had higher adsorption capacity but commercial membranes showed better mechanical stability for pertraction process application.
Review
Engineering, Environmental
Rui Li, Ning Li, Jingwei Hou, Yang Yu, Lan Liang, Beibei Yan, Guanyi Chen
Summary: This study reviews the application of atomic layer deposition (ALD) in water treatment, discussing its advantages and significant role. ALD can precisely fabricate multifunctional materials, significantly improving the removal efficiency of water pollutants, and is of great importance for current and future water quality management.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Shihan Yan, Hao Li, Jiahao Zhu, Wei Xiong, Renbo Lei, Xinwei Wang
Summary: This study introduces a novel non-precious NiS(x)/CNT electrocatalyst, which enhances the kinetics of oxygen reduction and oxygen evolution reactions in zinc-air batteries, resulting in improved battery performance.
Article
Chemistry, Analytical
Qiumei Wang, Chenyu Wang, Xiao Chang, Xianghong Liu, Jun Zhang
Summary: By depositing Pd and Rh metals on porous In2O3 thin films using ALD technology, high and fast response to NO2 at room temperature was achieved. The Pd/Rh catalysts greatly improved the interaction and charge transfer between In2O3 and NO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Josiah Yarbrough, Stacey F. Bent
Summary: This study explores the use of 1-nitropropane as a small molecule inhibitor for selective atomic layer deposition. The results show that 1-nitropropane selectively chemisorbs on Cu and CuOx substrates, forming a high-quality inhibition layer. A new multistep process is developed for low-temperature Al2O3 ALD, allowing sequential reapplied and etched of the SMIs. The resulting area-selective ALD process enables high selectivity and could expand selective growth schemes to temperature-sensitive substrates.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Shawulienu Kezilebieke, Orlando J. Silveira, Md N. Huda, Viliam Vano, Markus Aapro, Somesh Chandra Ganguli, Jouko Lahtinen, Rhodri Mansell, Sebastiaan van Dijken, Adam S. Foster, Peter Liljeroth
Summary: The successful synthesis of a superconductor-ferromagnet heterostructure using molecular-beam epitaxy technique demonstrates that the monolayer of CrBr3 maintains its ferromagnetic ordering under external magnetic field, leading to a slight reduction in the superconducting gap of NbSe2 and the formation of a vortex lattice on the CrBr3 layer. These findings suggest the potential of leveraging proximity effects to achieve novel phenomena in 2D heterostructures.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Applied
Prakhar Arora, Hoda Abdolahi, You Wayne Cheah, Muhammad Abdus Salam, Eva Lind Grennfelt, Henrik Radberg, Derek Creaser, Louise Olsson
Summary: The HDO activity of NiMo catalysts in bio-based feedstocks was evaluated in the presence of catalyst poisons, with a focus on contaminants like Fe, P, and metals. Calcination treatment was studied for recovering the activity of spent catalysts. Fe was found to have the most deactivating effect, with Fe deposits found to a depth of 100 μm regardless of concentration.
Article
Chemistry, Physical
Karsten Arts, Harvey Thepass, Marcel A. Verheijen, Riikka L. Puurunen, Wilhelmus M. M. Kessels, Harm C. M. Knoops
Summary: This study demonstrates that even under low-energy ion conditions, ions have a significant impact on the conformality, film thickness, crystallinity, and wet etch rate of TiO2 films during plasma ALD. The magnitude of this impact depends on various parameters such as deposition temperature, plasma exposure time, and ion energy, which can be utilized to minimize or exploit the effect. Understanding the role of ions in plasma ALD is crucial for precise control over film properties and process reproducibility.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Karsten Arts, Sanne Deijkers, Riikka L. Puurunen, Wilhelmus M. M. Kessels, Harm C. M. Knoops
Summary: This study determines the surface recombination probability r of oxygen radicals during plasma ALD of SiO2 and TiO2, finding that the determined values of r are very low within certain temperature and pressure ranges. The results can help optimize plasma ALD throughput for high-AR applications and provide valuable input for modeling radical recombination mechanisms.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Zahra Ahaliabadeh, Ville Miikkulainen, Miia Mantymaki, Seyedabolfazl Mousavihashemi, Jouko Lahtinen, Yao Lide, Hua Jiang, Kenichiro Mizohata, Timo Kankaanpaa, Tanja Kallio
Summary: Nickel-rich layered oxides like NMC622 suffer from poor durability at high voltages, but nanoscale coatings of TiOx and LixTiyOz have been found to enhance their electrochemical performance. The coatings reduce side reactions, suppress electrode degradation mechanisms, and improve cycle life and capacity. This study provides insight into enhancing the performance of Ni-rich positive electrode materials under high-voltage ranges.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Luojun Du, Yanchong Zhao, Linlu Wu, Xuerong Hu, Lide Yao, Yadong Wang, Xueyin Bai, Yunyun Dai, Jingsi Qiao, Md Gius Uddin, Xiaomei Li, Jouko Lahtinen, Xuedong Bai, Guangyu Zhang, Wei Ji, Zhipei Sun
Summary: The authors studied a 1D vdW semiconductor, fibrous red phosphorous, and observed exceptional optical properties of large optical anisotropy and high photoluminescence.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Joby Sebastian, You Wayne Cheah, Diana Bernin, Derek Creaser, Louise Olsson
Summary: In the deoxygenation process of kraft lignin to aromatics, the presence of impurities has a significant impact on the activity of the catalyst, with some impurities obstructing depolymerization and leading to catalyst deactivation. However, at lower loadings, impurities can also act as promoters, counteracting the negative effects during depolymerization.
Article
Nanoscience & Nanotechnology
Harjinder Singh, Rathindranath Biswas, Imtiaz Ahmed, Pooja Thakur, Avinava Kundu, Abhishek Ramachandra Panigrahi, Biplab Banerjee, Krishna Kamal Halder, Jouko Lahtinen, Krishnakanta Mondal, Krishna Kanta Haldar
Summary: This research developed an efficient electrocatalyst for the oxygen evolution reaction (OER) based on structurally versatile dumbbell-shaped ternary transition-metal phosphates. The electrocatalyst exhibited excellent catalytic performance and stability under alkaline and neutral conditions, making it a promising candidate for various electrochemical applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jose Rosa, Jouko Lahtinen, Jaakko Julin, Zhipei Sun, Harri Lipsanen
Summary: Atomic layer deposition (ALD) technology allows fine control at the atomic level, creating new materials characteristics and functions, particularly relevant for inorganic luminescent materials.
Article
Chemistry, Applied
Emma Verkama, Paavo Auvinen, Sylvia Albersberger, Marja Tiitta, Reetta Karinen, Riikka L. Puurunen
Summary: Studied the effects of co-hydrotreating palmitic acid and tetradecylamine on the reactivity and selectivity of a catalyst. Found that hydrodeoxygenation is faster than hydrodenitrogenation and that deoxygenation reactions inhibit hydrodenitrogenation. Also observed that the formation of heavy secondary amides and amines increases with an increase in the share of palmitic acid in the feed. Described the ease of hydrodeoxygenation compared to hydrodenitrogenation and the inhibitory effect on the latter.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Physical
Jaenis Jaervilehto, Jorge A. Velasco, Jihong Yim, Christine Gonsalves, Riikka L. Puurunen
Summary: Atomic layer deposition (ALD) is widely used for coating high-aspect-ratio (HAR) structures. Different models, such as diffusion-reaction (DR) models, ballistic transport-reaction (BTR) models, and Monte Carlo simulations, have been developed to analyze the conformality of ALD films in HAR structures. This study compares the saturation profiles obtained from a DR model and a BTR model. The qualitative and quantitative comparison of these profiles reveals differences in penetration depth, slope, and adsorption front broadness between the two models.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Jihong Yim, Emma Verkama, Jorge A. Velasco, Karsten Arts, Riikka L. Puurunen
Summary: Unparalleled conformality is driving new applications for atomic layer deposition (ALD). In this study, a diffusion-reaction model was implemented to simulate film growth in wide microchannels. The model considered various process parameters and showed that factors such as molar mass and growth per cycle influenced the penetration depth into the microchannel. The study also compared the model to a slope method for extracting the sticking coefficient.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
You Wayne Cheah, Muhammad Abdus Salam, Joby Sebastian, Sreetama Ghosh, Olov Ohrman, Derek Creaser, Louise Olsson
Summary: Catalytic hydrodeoxygenation (HDO) is crucial for producing high-quality biomass-derived fuel components and chemicals. The study focuses on enhancing unsupported MoS2 catalysts through post-annealing treatment, leading to improved deoxygenation activity and efficiency.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Chemistry, Physical
Muhammad Abdus Salam, You Wayne Cheah, Phuoc Hoang Ho, Louise Olsson, Derek Creaser
Summary: The study found that NiMoY30 exhibited the highest hydrogenolysis activity for etheric C-O bonds, despite NiMoY12 showing a higher initial cleavage rate. Additionally, NiMoY30 showed good hydrodeoxygenation and cracking reactions, resulting in a higher yield of deoxygenated products. Even with lower acidity, NiMoY80 was able to rapidly cleave the methylene-linked C-C dimer. Overall, the balance of acidity and pore accessibility in NiMoY30 led to effective breaking of recalcitrant linkages in lignin, producing a liquid transportation fuel rich in hydrocarbons.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Chemistry, Physical
You Wayne Cheah, Muhammad Abdus Salam, Prakhar Arora, Olov Ohrman, Derek Creaser, Louise Olsson
Summary: Transition metal sulfides are commonly used in petroleum refining for HDS and HDN, while bio-oils require HDO for upgrading to advanced biofuels. Catalyst screening showed varying yields of deoxygenated compounds with Ni-promoted catalyst being the most effective. A kinetic model revealed DDO as the dominant pathway for deoxygenation of PG using sulfided catalysts.
SUSTAINABLE ENERGY & FUELS
(2021)