Article
Chemistry, Multidisciplinary
Dirk Doehler, Andres Triana, Pascal Buettner, Florian Scheler, Eric S. A. Goerlitzer, Johannes Harrer, Anna Vasileva, Ezzeldin Metwalli, Wolfgang Gruber, Tobias Unruh, Alina Manshina, Nicolas Vogel, Julien Bachmann, Ignacio Minguez-Bacho
Summary: A highly ordered nanostructured transparent electrode is prepared via a combination of nanosphere lithography and anodization, improving pore domain size and reducing defect pore density. The increased electrical contact between the electrode and the conductive substrate results in improved performance of energy conversion devices.
Article
Materials Science, Multidisciplinary
Krzysztof Staninski, Malgorzata Kaczmarek
Summary: Spectroscopic studies were conducted on mesoporous alumina layers obtained by anodic oxidation in various solutions, revealing the influence of thermal treatment, electrolyte type, and excitation time on the emission spectra. Significant differences were found between the afterglow luminescence (A-Lum) and photoluminescence phenomena based on the kinetic parameters of emission decay curves and emission spectra.
Article
Polymer Science
Nabila Mehwish, Mengdie Xu, Muhammad Zaeem, Bae Hoon Lee
Summary: Surface functionalization via molecular design is a crucial method for adding new functions to existing biomaterials. Mussel-inspired polydopamine (PDA) has been used to functionalize bovine serum albumin methacryloyl (BSAMA)-BM cryogels, resulting in excellent antioxidative and antibacterial qualities, improved mineralization, and better cell responsiveness.
Article
Chemistry, Inorganic & Nuclear
Fatemeh Hakimi, Maede Abroon, Somayeh Sadighian, Ali Ramazani
Summary: Graphene oxide/hydroxy apatite (GO/HAp) nanocomposites were synthesized using different ratios of HAp through a hydrothermal process. The impact of these ratios on the growth of bone-like HAp crystals was investigated, and the bioactivity of the GO/HAp nanocomposites was tested in a simulated body fluid solution. Characterization techniques such as FTIR, XRD, and TEM confirmed the successful synthesis of GO/HAp nanocomposites.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Alla Vorobjova, Daria Tishkevich, Elena A. Outkina, Dmitry L. Shimanovich, Ihar U. Razanau, Tatiana Zubar, Anastasia A. Bondaruk, Ekaterina K. Zheleznova, Mengge Dong, Dalal A. Aloraini, M. Sayyed, Aljawhara H. Almuqrin, Maxim Silibin, Sergey Trukhanov, Alex Trukhanov
Summary: This paper discusses the formation of Ta2O5 pillars with Ni tips during thin porous anodic alumina through-mask anodization on Si/SiO2 substrates. It reveals the main mechanism of the formation of Ta2O5 pillars and observes the superparamagnetic behavior of the Ta2O5 nanopillars with Ni tips. These findings provide a theoretical and experimental basis for the development of novel functional nanomaterials.
Article
Materials Science, Multidisciplinary
Koichiro Hayashi, Akira Tsuchiya, Masaya Shimabukuro, Kunio Ishikawa
Summary: The use of scaffolds with multiscale pores is an effective strategy for bone regeneration. In this study, multiscale porous scaffolds (MPSs) were fabricated and the effects of macropores and micropores on bone regeneration were evaluated. The results showed that macropores played a crucial role in promoting new bone formation in the early stage, while micropores were the dominant factor affecting the replacement of MPSs with new bone in the medium term. Optimization of pore size distribution is a promising strategy to develop scaffolds that satisfy the requirements of both osteogenesis and mechanical strength.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Takashi Yanagishita, Hideaki Takai, Toshiaki Kondo, Hideki Masuda
Summary: SnO2 nanofibers with uniform diameters were successfully obtained using ordered anodic porous alumina as a spinneret and wet spinning followed by heat treatment. The monodisperse nanofiber structures were maintained even after heat treatment at 600 degrees C, showcasing the potential for precise fiber diameter control by changing the hole size of the spinneret. The obtained SnO2 nanofibers are expected to be useful in various functional devices.
Article
Engineering, Biomedical
Camila Bussola Tovani, Thibaut Divoux, Sebastien Manneville, Thierry Azais, Guillaume Laurent, Marta de Frutos, Alexandre Gloter, Pietro Ciancaglini, Ana P. Ramos, Nadine Nassif
Summary: This study investigates the physiological and pathological effects of strontium (Sr2 +) on bone biomineralization. The results show that excessive levels of Sr2 + destabilize the mineral and collagen fibril assembly, leading to impaired cellular activity and correlating with bone-weakening disorders.
ACTA BIOMATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Daria Tishkevich, Alla Vorobjova, Anastasia A. Bondaruk, Elena S. Dashkevich, Dmitry L. Shimanovich, Ihar U. Razanau, Tatiana Zubar, Dmitry Yakimchuk, Mengge G. Dong, M. Sayyed, Hamoud H. Somaily, Denis A. Vinnik, Maxim Silibin, Sergei Trukhanov, Valery M. Fedosyuk, Alex Trukhanov
Summary: This article presents the results of studies on the wettability properties and preparation of porous anodic alumina (PAA) membranes with different pore sizes. The research found that the surface properties of alumina can be changed from hydrophilic to hydrophobic by adjusting the synthesis conditions. This study is of great significance in designing functional surfaces with tunable wettability.
Article
Materials Science, Multidisciplinary
Hideki Hashimoto, Yuki Fujita, Koji Yazawa, Hidetaka Asoh
Summary: Using NMR spectroscopy, this study investigated the factors influencing the local structure of anodic porous alumina films prepared under different electrolytic conditions. It was found that anion-free alumina films prepared with chromic acid showed no dependence on electrolytic factors, while films prepared with phosphoric acid exhibited a lower average coordination number. Films prepared with oxalic and sulfuric acids showed a higher average coordination number. Furthermore, the type and content of anions were found to affect the aluminum coordination number of the alumina films. The depth of anion incorporation into cell walls and compositional uniformity were also crucial for accurate interpretation of NMR spectra.
RESULTS IN PHYSICS
(2023)
Article
Materials Science, Coatings & Films
Chunnan Wang, Ruomei Shao, Guiqiang Wang, Jingru Zhao, Zhou Sha, Shuqing Sun
Summary: This paper presents the anisotropic wet etching of porous anodic alumina (PAA) using phosphoric acid to controllably form various structures, achieving specific structures such as alumina micropillar arrays by controlling the thickness of PAA films. By fine-tuning the etching conditions, cone-shaped pillar arrays can also be obtained. The super-hydrophobic surfaces prepared can be used as templates to replicate various polymer structures.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Xianzhong Lang, Xudong Wang, Ji Ma, Teng Qiu
Summary: A novel process for the flexible fabrication of new-type porous anodic alumina membranes with tunable geometric features is described, achieving a series of new-type PAAs with controlled characteristics through adjusting the anode voltages of PAA stamps, imprinting pressures and guided anode voltages. These new-type PAAs provide a low-cost flexible option for the preparation of arrays for photonic, electronic, and magnetic devices.
NANOSCALE ADVANCES
(2021)
Article
Thermodynamics
Ilya I. Ryzhkov, Ivan A. Kharchenko, Elena Mikhlina, Andrey Minakov, Dmitry Guzei, Ivan Nemtsev, Mikhail N. Volochaev, Anna Korobko, Mikhail M. Simunin
Summary: Experimental and simulation studies on the growth mechanism of carbon nanotubes in PAA membranes reveal the influence of synthesis temperature, pressure, argon flow rate, and ethanol/water flow rate on carbon growth rate. SEM and TEM image processing show overestimated values of nanotube diameter and thickness in SEM data compared to TEM data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
H. Simunkova, T. Lednicky, A. H. Whitehead, L. Kalina, P. Simunek, J. Hubalek
Summary: Fabrication of tantalum-based nanotube arrays was achieved through porous anodic alumina assisted electrodeposition, with the electrolyte employing an ionic liquid solvent, leading to impurities in the nanotubes. Analysis showed the nanotubes to be semiconducting, which is significant for potential applications in microelectronic devices.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Takashi Yanagishita, Reina Asami, Hideki Masuda
Summary: Monodisperse albumin particles were obtained through membrane emulsification using ordered anodic porous alumina with uniform-sized holes, with the particle size controlled by adjusting the hole size. A fluorescent dye was loaded into the albumin particles by adding it to the dispersed phase used for emulsification. These monodisperse albumin particles with controlled size show potential for various applications, particularly as drug carriers.
MATERIALS RESEARCH EXPRESS
(2021)
