Article
Chemistry, Physical
Gaoying Hong, Mengyuan Liao, Tong Wu, Qiyue Zhou, Haifeng Xie, Chen Chen
Summary: The study demonstrated that grafting mercapto- and amino-terminated silanes effectively enhanced the osteogenic potential of Y-TZP implants, promoting osteogenic differentiation and mineralization while improving surface hydrophilicity to facilitate cell adhesion and growth. In contrast, vinyl- and methyl-terminal silanes exhibited inhibitory effects on certain bone-related gene expressions, highlighting the superiority of mercapto- and amino-terminated silanes in promoting osteogenesis.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Composites
Shubham C. Ambilkar, Chayan Das
Summary: Uniform dispersion of metal oxide-like zirconia in elastomeric matrix is essential for proper reinforcement. In this study, three different surface modifiers were employed to modify sol-gel derived zirconia and their effects on the properties of zirconia-filled nitrile rubber composite were investigated. The results show that tris (hydroxymethyl) aminomethane (Tris) is a potential surface modifier for zirconia, which can improve the thermal stability and tensile strength of the composite.
POLYMER COMPOSITES
(2023)
Article
Engineering, Chemical
Yu-Lin Kuo, Hua-Wei Chen, Ying-Sui Sun, Shu-Chuan Liao, Yu-Ming Su, Yih-Hsing Lo
Summary: This study demonstrated the controlled formation of oxygen vacancies in tetragonal zirconia particles using a nonthermal atmospheric pressure plasma jet (APPJ). Characterization analyses confirmed the presence of oxygen vacancies and their relationship with surface defects, which resulted in a decreased bandgap. This research suggests that defect engineering via the APPJ method holds promise for improving the optoelectronic and photocatalytic performance of oxide materials.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Dan Zhao, Ming Chen, Zhipeng Pi, Fan Zhang
Summary: This study focuses on the effects of rare-earth dopants on the phase equilibria and phase stability of tetragonal zirconia in ZrO2-RETaO4 systems. The composition range of non-transformable t-ZrO2 in ZrO2-YbTaO4, ZrO2-DyTaO4, and ZrO2-GdTaO4 is measured to be about 30-41, 22-29, and 16-19 mol% RE0.5Ta0.5O2, respectively. However, non-transformable t-ZrO2 cannot be found in ZrO2NdTaO4 and ZrO2-LaTaO4. These findings are valuable for the development of appropriate thermal barrier coatings.
CERAMICS INTERNATIONAL
(2023)
Article
Spectroscopy
Maneshwar Thakur, Ankush Vij, Fouran Singh, Vir Singh Rangra
Summary: This study investigates the structural and luminescent properties of zirconium dioxide synthesized via the solid-state combustion method. The results show that the synthesized zirconium dioxide mainly exhibits a tetragonal structure, with a minor monoclinic phase observed in some samples. The sample with a 1:1 nitrate-fuel ratio demonstrates a more pronounced overall thermoluminescence intensity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Materials Science, Ceramics
Michiyuki Yoshida, Mitsuki Hada, Osamu Sakurada, Koji Morita
Summary: Transparent tetragonal zirconia (3YTZ) was obtained by sinter forging nanoparticles at 950°C under an applied stress of 200 MPa. The initial compact made by gel-casting had a densely packed structure of nanoparticles. The resulting dense sample had a grain size of approximately 47 nm. The in-line transmittance of a 0.9 mm-thick sample was 28% at a wavelength of 640 nm, representing 37% of the theoretical value. The sample with the best transparency in this study had a slight whitish appearance. This study demonstrated the effectiveness of combining nanoparticle gel-casting with external pressure to lower the sintering temperature for obtaining transparent tetragonal zirconia.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Kshitij Gurung, Travis H. James, Angel Torres, Alexander Sinitskii, Marjorie A. Langell
Summary: The study investigated the oxygen availability of cerium oxide catalysts in the form of nanocrystalline ZnxCe1-xO2 solid solution, showing increased oxygen reactivity with higher zinc concentrations. Both H-2 temperature-programmed reduction and methanol oxidation reactions demonstrated enhanced oxygen availability and reactivity with increased zinc content up to the miscibility limit.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
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
Chemistry, Multidisciplinary
Yajuan Zhao, Zhigang Yin, Xingxing Li, Maoyuan Zheng, Yong Cheng, Jingbi You, Jinliang Wu, Xingwang Zhang
Summary: This study reports the stabilization of the metastable tetragonal phase of BiFeO3 on the highly anisotropic ZnO(11-20) surface. Heteroepitaxy generates anisotropic misfit strains that are powerful in controlling the energy balance of competing phases, favoring the formation of tetragonal BiFeO3. The integration of thick tetragonal BiFeO3 films with ZnO has important implications for oxide electronics.
CRYSTAL GROWTH & DESIGN
(2021)
Review
Engineering, Biomedical
Kai Tang, Meng-Lin Luo, Wei Zhou, Li-Na Niu, Ji-Hua Chen, Fu Wang
Summary: Stable soft tissue integration is crucial for long-term implant stability, preventing peri-implantitis, and protecting underlying bone tissue. Zirconia abutments are preferred over titanium for aesthetic restoration, but achieving soft tissue attachment remains challenging. This review discusses advances in zirconia surface treatment and structural design that can enhance soft tissue integration.
BIOACTIVE MATERIALS
(2023)
Article
Chemistry, Applied
Na Li, Weiwei Wang, Lixin Song, Hui Wang, Qiang Fu, Zhenping Qu
Summary: In this study, three types of CexZryOz (CCZ) catalysts with different crystal phases were constructed, and it was found that tetragonal-CCZ (CCZ-t) exhibited the highest activity and methanol selectivity, while cubic-CCZ (CCZ-c) showed lower reaction activity and methanol selectivity. Structural analysis revealed a correlation between oxygen vacancies, surface hydroxyls, and unsaturated Cu species with the activity and methanol selectivity. Temperature programmed experiments and mechanism studies showed that the interface between Cu and tetragonal (t and t) CexZryOz promoted CO2 adsorption and the formation of intermediate species, which facilitated the production of methanol. These findings suggest that constructing active Cu-support interfaces is a crucial approach for designing catalysts for CO2 hydrogenation.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Zanlin Qiu, Cheng-Han Li, Joerg R. Jinschek, Pelagia-Irene Gouma
Summary: HfO2 exhibits polymorphism that can lead to a wide range of applications in thermal barrier coatings and MOSFETs, but stabilizing metastable phases like the tetragonal polymorph requires high temperatures, limiting the synthesis of large quantities of tetragonal HfO2.
CERAMICS INTERNATIONAL
(2021)
Article
Green & Sustainable Science & Technology
Ruibing Li, Zhixin Yao, Sansan Yu, Ting-an Zhang, Dajin Yang
Summary: Arsenic sulfide slag (ASS), the product of sulfide precipitation from arsenic wastewater, needs further processing to protect the environment. In this study, surface modification of arsenic sulfide particles (ASP) was investigated to reduce the use of lime and the oxidizing agent. The stability of the arsenic in the surface modified ASP was evaluated using USEPA toxicity characteristics leaching procedure (TCLP) in which the ASS was cured with cement. The method successfully reduces the leaching concentration of arsenic and has the potential to reduce industrial toxic arsenic slag discharge.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Multidisciplinary
Divya Chopra, Anjana Jayasree, Tianqi Guo, Karan Gulati, Saso Ivanovski
Summary: Zirconium (Zr)-based implants have gained popularity due to their excellent properties, but their performance can be suboptimal in compromised conditions. This study fabricated controlled ZrO2 nano structures (ZONs) on Zr surfaces using optimized electrochemical anodization. The findings showed that nano-engineered Zirconia augments osteoblast activity without promoting biofilm formation. Anodized nano-engineered Zirconia implants are proposed as potential next-generation dental implants.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Physics, Multidisciplinary
A. Abu El-Fadl, Amna M. Eltokhey, A. A. Abu-Sehly, Amina A. Abozeed
Summary: In this study, Fe-x/ZrO2 nanoparticles were synthesized using a modified sol-gel method. The stability of the tetragonal phase of ZrO2 was investigated in relation to the Fe incorporation ratios and thermal treatment. XRD analysis confirmed the formation of zirconium oxide with good crystallinity in the tetragonal phase at different Fe ratios. The effect of thermal treatment on stabilizing the tetragonal phase was extensively studied.
Article
Materials Science, Composites
H. N. Petersen, R. F. Minty, J. L. Thomason, L. Yang, Y. Kusano, P. Brondsted, K. Almdal
COMPOSITE INTERFACES
(2019)
Article
Biochemistry & Molecular Biology
Morten Leth Jepsen, Line Hagner Nielsen, Anja Boisen, Kristoffer Almdal, Martin Dufva
Article
Materials Science, Multidisciplinary
Artem Shikin, Elizaveta Lebedkina, Czcibor Ciostek, Pawel Holewa, Sokol Ndoni, Kristoffer Almdal, Kresten Yvind, Marcin Syperek, Elizaveta Semenova
OPTICAL MATERIALS EXPRESS
(2019)
Article
Engineering, Biomedical
Fabio Tentor, Giorgia Siccardi, Pasquale Sacco, Danilo Demarchi, Eleonora Marsich, Kristoffer Almdal, Sanjukta Bose Goswami, Anja Boisen
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2020)
Article
Nanoscience & Nanotechnology
Firoz Babu Kadumudi, Jon Trifol, Mohammadjavad Jahanshahi, Tiberiu-Gabriel Zsurzsan, Mehdi Mehrali, Eva Zeqiraj, Hossein Shaki, Morteza Alehosseini, Carsten Gundlach, Qiang Li, Mingdong Dong, Mohsen Akbari, Arnold Knott, Kristoffer Almdal, Alireza Dolatshahi-Pirouz
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Materials Science, Multidisciplinary
Saif Ullah, Pierrick Anthony Mindykowski, Rolff Ripke Leisted, Sergey Chernyy, Sie Woldum Tordrup, Grunde Jomaas, Kristoffer Almdal
FIRE AND MATERIALS
(2020)
Article
Biochemistry & Molecular Biology
Mikkel Madsen, Peter Westh, Sanaullah Khan, Richard Ipsen, Kristoffer Almdal, Finn L. Aachmann, Birte Svensson
Summary: Alginates were studied for their ability to form complexes with beta-lactoglobulin at different pH levels and varying ratios of M and G residues. The results showed that pH and M content influenced the binding capacity and size of the particles, providing insights for designing alginate-protein particles in acidic environments.
Article
Chemistry, Multidisciplinary
Aaron P. Lindsay, Ashish Jayaraman, Austin J. Peterson, Andreas J. Mueller, Steven Weigand, Kristoffer Almdal, Mahesh K. Mahanthappa, Timothy P. Lodge, Frank S. Bates
Summary: The reanalysis of an asymmetric PEP-PDMS diblock co-polymer revealed a rich phase behavior including a dodecagonal quasicrystal, a Frank-Kasper sigma phase, and a body-centered cubic packing. When subjected to large amplitude oscillatory shear below the order-order transition temperature, a twinned BCC phase emerged, followed by a transition to an anisotropic DDQC state upon heating. Surprisingly, no evidence of epitaxy was observed during the sigma-BCC transition, suggesting a shear-induced order-order transition and an apparent BCC-DDQC epitaxy favored by micelle translation-mediated ordering dynamics far below the order-order transition temperature.
Article
Physics, Multidisciplinary
Kell Mortensen, Anine L. Borger, Jacob J. K. Kirkensgaard, Qian Huang, Ole Hassager, Kristoffer Almdal
Summary: This study presents a detailed description of the structural relaxation of a polystyrene star polymer after cessation of high-rate extensional flow, which includes three distinct regimes of relaxation and ends with relaxation via reptation.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Bin Wang, Einstom Engay, Peter R. Stubbe, Saeed Z. Moghaddam, Esben Thormann, Kristoffer Almdal, Aminul Islam, Yi Yang
Summary: In this study, we demonstrate a method for achieving high precision internal mechanical property gradients in 3D printing using tomographic volumetric printing (TVP) technology. By utilizing visible and UV light sources in conjunction with specific chemical reactions, we achieve full 3D stiffness control. Additionally, we identify the role of reactive transport of radical inhibitors in shaping the workpiece and limiting the achievable stiffness contrast range.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Christina Schmidleithner, Rujing Zhang, Nayere Taebnia, Esben K. U. Larsen, Kristoffer Almdal, Niels B. Larsen
Summary: A high-resolution dual-material 3D printing concept is developed, allowing for the production of distinct materials locally based on orthogonal chemical reactions depending on the illumination wavelength. The resulting devices have micrometer-scale precision in tissue modeling.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Suman Basak, Harshvardhan Ajay Khare, Paul J. Kempen, Nazila Kamaly, Kristoffer Almdal
Summary: Atherosclerosis, a leading cause of death worldwide, can be effectively treated using newly developed ROS-scavenging antioxidant nanoparticles. These nanoparticles, synthesized via reversible addition-fragmentation chain-transfer (RAFT) polymerization, act as a superoxide dismutase (SOD) mimetic agent. The nanoparticles are shown to be taken up by macrophages and exhibit cytocompatibility. Additionally, the nanoparticles have been demonstrated to inhibit foam cell formation in macrophages.
NANOSCALE ADVANCES
(2022)
Article
Physics, Multidisciplinary
Anine L. Borger, Qian Huang, Ole Hassager, Jacob J. K. Kirkensgaard, Kristoffer Almdal, Kell Mortensen
PHYSICAL REVIEW RESEARCH
(2020)
Article
Multidisciplinary Sciences
M. Skovgaard, M. Gudik-Sorensen, K. Almdal, A. Ahniyaz
SN APPLIED SCIENCES
(2020)
Article
Biochemistry & Molecular Biology
Suman Basak, Harshvardhan Ajay Khare, Martin Roursgaard, Paul J. Kempen, Jong Hyun Lee, Salime Bazban-Shotorbani, Martin Kraemer, Sergey Chernyy, Thomas L. Andresen, Kristoffer Almdal, Nazila Kamaly
Summary: This study focuses on the initiating mechanism of atherosclerosis and presents the development of therapeutic nanogels using biocompatible PEG cross-linking method. The nanogels release anti-inflammatory and anti-oxidizing enzyme PON-1 to reduce the production of ox-LDL, effectively inhibiting macrophage foam cell and reactive oxygen species formation.
