Article
Materials Science, Coatings & Films
Junling Qin, Zhiguang Cao, Jieying He, Hui Li, Zixue Su
Summary: Porous anodic metal oxides, including Al2O3, Fe2O3, TiO2, Ta2O5, prepared by anodization of corresponding metal substrates in appropriate electrolytes have found applications in various fields. The pore diameter and cell size of anodic TiO2 nanotube arrays can decrease dramatically under high voltage accompanied by high current density, leading to faster growth rates.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Chemical
Hernan D. Traid, Maria L. Vera, Marta I. Litter
Summary: The present study introduces a new figure of merit for the synthesis of TiO2 coatings by PEO, called total energy per unit of surface (TSE). A strong relationship was found between TSE and the TiO2 anatase fraction. By applying TSE and considering the known synthesis variables, the anatase fraction and pore diameter of the coating can be predicted before anodization.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Review
Biochemistry & Molecular Biology
Anna M. Brudzisz, Damian Gizinski, Wojciech J. Stepniowski
Summary: Anodic oxidation of metals leads to the formation of ordered nanoporous or nanotubular oxide layers, playing a significant role in various applications. However, there are still many fundamental aspects of anodizing that require deeper understanding. The inevitable phenomenon of anion incorporation during metal anodization and its impact on properties are discussed in detail in this review.
Article
Materials Science, Multidisciplinary
Zhuyin Chen, Chuanzong Wu, Xinli Liu, Ting Shen, Lei Zhang
Summary: Porous titanium materials with honeycomb pore structure were prepared by freeze casting, and the effect of freezing temperature on pore structure and mechanical properties was investigated. Anodizing resulted in neatly arranged nanopore structures on the surface, promoting cell adhesion and proliferation, thus improving biocompatibility. Apatite deposition was observed on the anodized porous titanium surface in simulated body fluid culture experiments, showing potential as a biomedical material.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Coatings & Films
Shuji Yamamoto, Terumitsu Nonaka
Summary: The electrostatic and tribological properties of three types of anodic aluminium oxide (alumite) and hydrogenated Diamond-Like Carbon (DLC) on alumites were investigated. It was found that ultrathin DLC on an insulative surface exhibited slow discharge. Clear electrostatic discharge behavior was not observed on alumites, but slow charge and discharge were observed after coating alumites with hydrogenated DLC. DLC coatings significantly improved dielectric strength and hardness of alumites due to their intrusion into the porous structure. DLC coating also greatly improved the coefficient of friction, wear loss, and lifetime of alumites.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jiahuan Chen, Zhen He, Jiaming Liu, Yuxin Wang, Michael Hodgson, Wei Gao
Summary: Anodic aluminium oxide-copper (AAO-Cu) coatings were prepared on aluminium alloy substrates to achieve excellent antibacterial performance and mechanical stability. The intermediate zone of the AAO-Cu coating plays a significant role in enhancing adhesion and preventing defoliation. The sustained antibacterial capability of the AAO-Cu intermediate zone, even when the outer Cu coating is removed, makes it suitable for a wide range of antibacterial products in public.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Ivana Zrinski, Alexey Minenkov, Claudia Cancellieri, Cezarina Cela Mardare, Heiko Groiss, Achim Walter Hassel, Andrei Ionut Mardare
Summary: Improved performance and memory characteristics of memristive devices are achieved through combinatorial screening approach. A thin film library of Nb-Ta alloy with a compositional spread of 13 to 80 at.% Ta is used, and their anodic oxides serve as active layers. Memristors based on mixed Nb2O5-Ta2O5 are categorized into four compositional zones according to their switching characteristics. Excellent memory and electrical characteristics are exhibited by memristive devices based on two singled-out Nb-Ta alloys, making them promising candidates for neuromorphic applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Electrochemistry
Katsiaryna Chernyakova, Vaclovas Klimas, Arunas Jagminas, Nikita Lushpa, Igor Vrublevsky, Sigitas Jankauskas
Summary: A characteristic feature of disordered porous anodic film growth at the initial stage of aluminum anodizing was revealed. ImageJ analysis showed the simultaneous development of major pores and minor pores. A geometric model demonstrated that the centers of the minor pores are located inside the elementary hexagonal cell formed by the centers of the major pores. The development of minor pores is determined by energy-efficient conditions.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Aziz Fennouri, Jonathan List, Julie Ducrey, Jessica Dupasquier, Viktorija Sukyte, Simon F. Mayer, Reyner D. Vargas, Laura Pascual Fernandez, Frederick Bertani, Sandra Rodriguez Gonzalo, Jerry Yang, Michael Mayer
Summary: The study demonstrated a method to overcome the size limitation of protein pores for analyzing and characterizing globular biomolecules by programmably assembling peptide with single-stranded DNA to form pores of various diameters. The functionalization of these semisynthetic biological nanopores with DNA-cholesterol anchors increased their sensitivity to lipid membranes and prolonged their open-state lifetime, showing potential for enhanced cytotoxic activity against cancer cells.
Article
Materials Science, Multidisciplinary
Ivana Zrinski, Alexey Minenkov, Claudia Cancellieri, Roland Hauert, Cezarina Cela Mardare, Jan Philipp Kollender, Lars P. H. Jeurgens, Heiko Groiss, Achim Walter Hassel, Andrei Ionut Mardare
Summary: A combinatorial screening approach was designed to identify Hf-Ta anodic memristors with enhanced properties. Two compositional zones were found to be relevant for memristive applications. The chemistry and microstructure of these special anodic structures were investigated using photoelectron spectroscopy and high-resolution transmission electron microscopy.
APPLIED MATERIALS TODAY
(2022)
Article
Materials Science, Multidisciplinary
Xianzhe Shi, Xiuxia Wang, Biao Chen, Junko Umeda, Abdollah Bahador, Katsuyoshi Kondoh, Jianghua Shen
Summary: Oxygen is an effective strengthening element in titanium and its alloys, but excessive oxygen can lead to embrittlement. By studying the decomposition process of Ti oxides in a-Ti matrix at elevated temperatures, we can precisely control and push the limit of oxygen in Ti and its alloys. The results show that TiO particles decompose and oxygen atoms diffuse into the matrix. By incorporating 0.87 wt% oxygen, an ultra-high tensile strength of close to 1100 MPa can be achieved without sacrificing elongation-to-failure. The strength contribution from oxygen follows the Labusch law. These findings offer a novel approach to design high-performance Ti alloys with nontoxic and cheap elements.
MATERIALS & DESIGN
(2023)
Article
Green & Sustainable Science & Technology
Reza Behmadi, Mahsa Mokhtarian, Ali Davoodi, Saman Hosseinpour
Summary: In this study, three different active gamma-bauxite were developed from a low-grade raw boehmite ore as adsorbents for desulfurization of gas condensates. The process parameters were optimized using response surface methodology. The results showed that intercalated PBa had higher sulfur removal efficiency compared to non-intercalated adsorbents, with similar pore size but larger surface area, indicating the successful role of PEG in improving desulfurization efficiency.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Analytical
Joonwon Lim, Ki-Hwan Kim, Costel-Sorin Cojocaru
Summary: The use of artificial nuclei in electrodeposition facilitates uniform and stable Cu nanoobject fabrication within nanopores, providing precise control over the geometry of the nanoobjects. This approach effectively suppresses random overgrowth of Cu, achieving highly uniform distribution on substrate surfaces.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Environmental Sciences
Hassan H. Shaarawy, Hala S. Hussein, Nabila H. Hussien, Ghada A. Al Bazedi, Salwa Hawash
Summary: This study presents the results of preparing nanometric titanium dioxide through anodic dissolution and calcination process. The optimized anodic dissolution conditions and thermal calcination process resulted in high-purity anatase titanium dioxide nanopowder. The chemical and physical characterizations confirmed the potential applications of these nanoparticles in photocatalysis, semiconductors, and wastewater treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Cesar Adolfo Escobar Claros, Leonardo Contri Campanelli, Alberto Moreira Jorge Jr, Jean-Claude Lepretre, Claudemiro Bolfarini, Virginie Roche
Summary: This study investigated the corrosion behavior of Ti-12Mo-6Zr-2Fe alloy under different surface conditions and found that samples with Nt and NP exhibited higher corrosion resistance and lower passivation current after 14 days in SBF. Traditional equivalent circuits and a new two-channel transmission line model were used to efficiently simulate the EIS data of the various surface conditions.
Article
Engineering, Chemical
Fangren Qian, Bing Zhao, Min Guo, Zhijian Wu, Wuzong Zhou, Zhong Liu
Summary: The research demonstrates that Na doping (LMO-Na) can enhance the adsorption capacity of Li1.6Mn1.6O4 and reduce the dissolution rate of Mn, thereby improving the material's cycling stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Jialu Chen, Jemima J. Davies, Alister S. Goodfellow, Sarah M. D. Hall, Helena G. Lancaster, Xinyu Liu, Cameron J. Rhodes, Wuzong Zhou
Summary: Dendritic silver and copper crystals were synthesized via Galvanic replacement reactions on zinc and aluminum plates. The study revealed that crystal growth is controlled by kinetics and thermodynamics, with crystal growth rate and Coulomb interaction between negatively charged crystal surface and metal cations playing crucial roles in the formation of metal dendrites.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Coatings & Films
Junling Qin, Zhiguang Cao, Hui Li, Zixue Su
Summary: TiO2 nanotubes with a diameter down to around 6 nm were successfully fabricated in ammonium fluoride-containing ethylene glycol electrolyte through a one-step anodic oxidation method. By systematically studying the influences of various factors, the growth mechanism of TiO2 nanotubes with ultra-small pore diameter and cell size was revealed.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Hui Li, Junling Qin, Zhiguang Cao, Zixue Su
Summary: Through the use of 4D transmission electron microscopy, the authors demonstrated the formation of reversible laser-induced periodic surface structures on amorphous silicon nitride and silicon dioxide thin films, which can transition to permanent structures based on laser intensity and pulse number. The orientation of these structures shows unexpected laser polarization memory.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Chemistry, Physical
Zhiguang Cao, Yuebei Yang, Junling Qin, Zixue Su
Summary: In this study, hollow carbon nanospheres loaded with MnO2 were investigated as an anode material for lithium-ion batteries, showing excellent electrochemical performance and cycling stability.
JOURNAL OF POWER SOURCES
(2021)
Article
Nanoscience & Nanotechnology
Zhen Bao, Chiao-Yin Hsiu, Mu-Huai Fang, Natalia Majewska, Weihao Sun, Shing-Jong Huang, Eric Chung-Yueh Yuan, Yu-Chun Chang, Jerry Chun Chung Chan, Sebastian Mahlik, Wuzong Zhou, Chia-Wei Yang, Kuang-Mao Lu, Ru-Shi Liu
Summary: Cs4PbI6, a rarely investigated member of the Cs4PbX6 family, has been successfully synthesized and optimized with the addition of ZnI2 as an effective supplier of iodide ions. The material exhibits strong red to near-infrared emission properties, attributed to numerous embedded CsPbI3 nanocrystallites. High-resolution transmission electron microscopy confirmed a raisin bread-like structure of the Cs4PbI6 crystals, which were successfully used to fabricate a NIR mini-LED for biological applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Hui Li, Zixue Su
Summary: (NH4)(3)FeF6 mesocrystalline octahedrons are formed through in situ dissolution and the reaction of anodic iron oxides, followed by a non-classical crystal growth process involving electrical polarization and alignment of primary (NH4)(3)FeF6 particles under an external electric field. The obtained (NH4)(3)FeF6 can be converted to nano-micro hierarchical alpha-Fe2O3 octahedrons through thermal annealing.
CHEMICAL COMMUNICATIONS
(2022)
Article
Electrochemistry
Hui Li, Zixue Su
Summary: The 3D ordered superstructures of NH4TiOF3 and (NH4)(2)TiOF4 were synthesized through in-situ evolution from anodic TiO2 nanotube arrays grown on the Ti metal substrate under high current density. These mesocrystals consist of well aligned nanoparticle subunits and can be converted to TiO2 (anatase) mesocrystals with their original exterior shapes retained upon thermal annealing. The formation of NH4TiOF3 and (NH4)(2)TiOF4 mesocrystals involves a nonclassical crystal growth process with fast oriented aggregation of particles assisted by electric field-dipole interaction.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Physics, Applied
Hui Li, Zixue Su
Summary: Time-resolved dark-field imaging of alpha Fe2O3 nanoparticle and Ag nanowires using scattered electrons by selected crystal planes is achieved by photon-induced near-field electron microscopy (PINEM) with high spatiotemporal resolution.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Weihao Sun, Wuzong Zhou
Summary: Pseudo-icosahedral Cu microcrystals were synthesized in a solvothermal system and the novel formation mechanism of the crystals was investigated. The evolution of structural and morphological features of Cu microcrystals was found to be influenced by the crystalline phases in the solution, resulting in the formation of pseudo-icosahedral shapes.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Hui Li, Zixue Su
Summary: Hierarchical nanocrystalline cuboids with large electrolyte-electrode contact areas, channels, and pore accessibility were synthesized by a nonclassical crystallization process and thermal annealing, exhibiting excellent performance as lithium-ion battery anodes.
Article
Chemistry, Multidisciplinary
Weihao Sun, Wuzong Zhou
Summary: Cu2O spherulites are fabricated solvothermally using Cu(NO3)(2) and polyvinylpyrrolidone (PVP). The spherulites are composed of needle-like submicron-rods made of small Cu2O/PVP spheres, with embedded Cu2O nanocrystallites generating a dipolar field along the [100] direction. The spherulites have a negatively charged surface due to the orientation of nanocrystallites towards the core and surface.
Article
Chemistry, Multidisciplinary
Kirsty McRoberts, Wuzong Zhou
Summary: The investigation of crystal growth of metal organic framework MIL-68(In) under solvothermal conditions revealed a non-classical reversed crystal growth mechanism, involving a path from nanorods to oriented aggregation into polycrystalline microrods to surface recrystallization into a hexagonal shell to extension of recrystallization from surface to core of microrods.
Article
Chemistry, Multidisciplinary
Chang-Yang Chiang, Wuzong Zhou
Summary: MnxCo3-xO4 yolk-shell microspheres are formed via a solvothermal reaction using hydrated cobalt and manganese nitrates in ethanol. Spinel nanocrystals of cobalt oxide or cobalt-rich ternary oxide and manganese-rich hydroxide nanosheets aggregate into large microspheres due to their strong inter-particle interaction. The formation mechanism based on electron microscopic studies could help in developing multifunctional materials based on yolk-shell structures.
Article
Chemistry, Physical
Jinping Zhong, Yikui Zeng, Zheng Yin, Mingyuan Zhang, Dengfeng Yan, Zixue Su, Peirong Chen, Mingli Fu, Daiqi Ye
Summary: Controllable assembly of three-dimensional (3D) nanomaterials from one-dimensional (1D) metal-organic frameworks (MOFs) through gentle hydrolysis has been achieved, allowing for full recovery of expensive organic ligands. The transformation of 1D nanowires of Co-MOF-74 into 3D CoCO3 with different morphologies was successfully accomplished using urea or hexamethylenediamine (HMT) as modulators. The resulting 3D CoCO3-derived Co3O4 catalyst showed enhanced catalytic performance for VOC degradation compared to directly calcined 1D Co3O4 from Co-MOF-74, with consistent morphology and performance using recycled ligands.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
