Article
Chemistry, Inorganic & Nuclear
Matthias M. Minjauw, Ji-Yu Feng, Timo Sajavaara, Christophe Detavernier, Jolien Dendooven
Summary: This work presents the use of ruthenium tetroxide (RuO4) as a co-reactant in atomic layer deposition (ALD), achieving ALD of ruthenium-containing metal oxides and demonstrating self-limiting surface reactions. Different processes result in films with varied metal ratios and impurities, all of which are amorphous.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Yueqing Ren, Xiaojie Sun, Lanlan Chen, Hui Wei, Bo Feng, Jingyun Chen
Summary: In this study, polymer-based encapsulation films were prepared by plasma-enhanced atomic layer deposition (PEALD) of Al2O3 film on a polycarbonate (PC) substrate. The properties of the PC substrate, the structure of PEALD Al2O3 films, and the optical transmission, surface morphology, and gas-barrier properties of the Al2O3/PC film were investigated as a function of temperature. The optimal deposition temperature was found to be 120°C, and the minimum water vapor transmission rate (WVTR) and oxygen transmission rate (OTR) of the Al2O3/PC film were 0.00132 g/(m^2 24 h) and 0.11 cm^3/(m^2 24 h 0.1 MPa), respectively. The gas-barrier properties of the Al2O3/PC film were attributed to both the densification of the Al2O3 film and the cracks caused by the shrinkage of the PC substrate.
Review
Chemistry, Multidisciplinary
Eszter Fazekas, Phoebe A. Lowy, Maisarah Abdul Rahman, Anna Lykkeberg, Yali Zhou, Raju Chambenahalli, Jennifer A. Garden
Summary: This review focuses on efficient polymerization catalysts based on main group metals such as Group 1, Group 2, Zn, and Group 13. Key mechanisms and catalyst developments, including ligand design, heterometallic cooperativity, bicomponent systems, and selective polymerization conditions, are discussed.
CHEMICAL SOCIETY REVIEWS
(2022)
Review
Materials Science, Multidisciplinary
Binh M. Trinh, Boon P. Chang, Tizazu H. Mekonnen
Summary: The current packaging materials market is dominated by single-use plastics derived from petrochemicals, which are inexpensive and environmentally stable. However, these plastics pose a threat to the environment as they are rarely recycled and often end up in landfills or littered in the environment. Nature-derived and biodegradable polymers offer potential alternatives, but their barrier properties fall short compared to traditional plastics. Therefore, there is a need to enhance the barrier properties of sustainable polymer systems through chemistry and processing technology. This review summarizes the important contributions and advancements in improving the gas and moisture barrier properties of sustainable polymer systems for packaging applications, including microstructure tuning, surface energy modification, morphology control, and self-assembly.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Srikant Kumar Mohanty, Poshan Kumar Reddy, Om Kumar Prasad, Chien-Hung Wu, Kow-Ming Chang, Jia-Chuan Lin
Summary: This work demonstrates the achievement of 3-bit per cell storage capability in AlN/AlO memristors through interface engineering, showcasing seven distinct high resistance states and one low resistance state by controlling reset-stop voltage, as well as six resistance states with reliability and reproducibility by varying set compliance current.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Vrindaa Somjit, Bilge Yildiz
Summary: Identifying the structure of the Al2O3/Al interface is crucial for enhancing its performance in various applications. This study utilizes ab initio grand canonical Monte Carlo to explore the composition and configuration space of the interface, revealing its atomically sharp and layer-by-layer propagation nature. The insights obtained contribute to the design and engineering of Al2O3/Al-based corrosion coatings, controllable transistor technologies, and noise-free superconducting qubits.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Automation & Control Systems
Ruichen Tao, Xuefeng Xu, Yubin Fan, Jie Xiao, Yanqi Wang, Liming Wei
Summary: In this paper, the push-bending process for the aluminum tube with a relative bending radius of 0.9D was analyzed through simulation. The tangential tensile stress concentration occurring at the front endpoint of tube intrados increased the risk of cracking. To address this issue, a differential lubrication method using different friction coefficients at intrados and extrados was proposed. The simulation and experimental results demonstrated that the differential lubrication method effectively avoided cracking.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Vu Thi Tuyet Thuy, Lam Tan Hao, Hyeonyeol Jeon, Jun Mo Koo, Jaeduk Park, Eun Seong Lee, Sung Yeon Hwang, Sejin Choi, Jeyoung Park, Dongyeop X. Oh
Summary: The study successfully developed a sustainable, self-cleaning, transparent oxygen/moisture barrier coating on PET film, meeting key requirements for food packaging. The coating, formed through layer-by-layer assembly of nanomaterials, achieved low oxygen transmission rate and porous surface for low water vapor transmission rate, demonstrating high sustainability and potential for applications.
Article
Materials Science, Ceramics
Pejman Zamani, Zia Valefi, Kourosh Jafarzadeh
Summary: The study found that the Cr2O3 coating exhibited the best corrosion resistance, while the Cr2O3-25% Al2O3 coating had the lowest corrosion resistance. Both as-sprayed and sealed coatings showed an increase in polarization resistance and charge transfer resistance.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Industrial
Xiaohui Cui, Zhihao Du, Ang Xiao, Ziqing Yan, Dongyang Qiu, Hailiang Yu, Baoguo Chen
Summary: This study investigated the application of electromagnetic forming in the manufacturing of aircraft skin parts, demonstrating through numerical simulation the difference between electromagnetic partitioning forming and traditional bending forming methods, and verifying that electromagnetic partitioning forming can reduce material springback.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Materials Science, Composites
Hossein Dehghanian, Seyyed Mahdi Hosseini Farrash, Mohammad Jafari
Summary: This study experimentally investigated the effect of adding aluminum oxide nanoparticles on the flexural strength of glass/phenolic composites exposed to water environment. The results showed that adding 0.25 wt% of nanoparticles significantly increased the flexural strength of the composites after water absorption.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Physical
Vamseedhara Vemuri, Sean W. King, William A. Lanford, John T. Gaskins, Patrick Edward Hopkins, Jeremy Van Derslice, Han Li, Nicholas C. Strandwitz
Summary: Thermal processing of MLD alucone films can produce porous and low-k materials. The chemical evolution of the films during heating was studied using various spectroscopy techniques. The lowest dielectric constant of the processed alucone films was lower than that of ALD alumina films.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Juan He, Xue Jiang, Fujian Xu, Chenghui Li, Zhou Long, Hanjiao Chen, Xiandeng Hou
Summary: Low temperature and atmospheric pressure plasma-induced polymerization is shown as a fast and facile method for tailoring COF-1 packing phase and preparing diverse COFs, including 2D and 3D structures. The plasma approach allows for rapid synthesis of various COFs under mild conditions, requiring less time, lower power, and no additional heating or gas protection.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Ceramics
Yongfu Zhang, Aiming Bu, Yan Xiang, Yunjie Yang, Xiaolin Wei, Weiwei Chen, Huanwu Cheng, Lu Wang, Maoyuan Li, Lin Lu
Summary: This study aimed to rapidly synthesize Y3Al5O12 using plasma electrolysis for the first time, and studied the topography, structure, and elements of the prepared powder through SEM and XRD. The results showed that the synthesized Y3Al5O12 powder had a good crystal form and high purity.
CERAMICS INTERNATIONAL
(2021)
Article
Polymer Science
Xiaowu Wang, Minmin Shi, Jiwen Hui, Xinhui Kou, Jiansen Wang, Ronglin Zhong, Zhibo Li
Summary: A metal-free phosphonium bisborane Lewis pair (PBB-Br) was used as a catalyst for the immortal ring-opening polymerization (iROP) of propylene oxide (PO) with alcohols as chain-transfer agents (CTAs). Narrow dispersed poly-(propylene oxides)(PPOs) with controllable molecular weights were obtained. The iROP feature of PBB-Br-catalyzed PO polymerization was demonstrated, allowing for the production of various well-defined heterofunctionalized PPOs.
