Article
Chemistry, Multidisciplinary
Jia-Ahn Pan, Justin C. Ondry, Dmitri Talapin
Summary: A direct photopatterning approach for lead halide perovskite nanocrystals has been introduced, allowing for the creation of patterns through molecular cleavage after photoirradiation. Postpatterning ligand exchange results in increased photoluminescence quantum yields and emission wavelength tunability. The patterned nanocrystal films exhibit photoconductive behavior, indicating good electrical contact between the nanocrystals.
Article
Engineering, Chemical
Muxi Zhang, Hongxiang Zhu, Beidou Xi, Yuxin Tian, Xiaojie Sun, Hongxia Zhang, Beibei Wu
Summary: Biochar-amended soil cover (BSC) in landfills can improve methane oxidation, but it may increase rainwater infiltration. Modifying biochar with the silane coupling agent KH-570 enhances its waterproof ability, reducing rainwater entering landfills. Hydrophobic biochar-amended soil cover (HBSC) showed significantly better waterproof performance compared to BSC in simulated precipitation tests.
Review
Chemistry, Multidisciplinary
Marine Le Goas, Justine Saber, Sara Gonzalez Bolivar, Jean-Michel Rabanel, Jean-Marc Awogni, Daria C. Boffito, Xavier Banquy
Summary: Multiple inorganic nanoparticles are being developed for nanomedicine, and the organic ligands on their surface play a crucial role in their stability and biological fate. However, the stability of ligands has been little addressed in the literature. This review aims to provide an overview of this phenomenon, identify mechanisms promoting ligand instability, and discuss the biological fate of ligands.
Article
Materials Science, Composites
Wei Zhu, Hong Xiao, Jian Wang, Xiudong Li
Summary: Epoxy silane coupling agent and amine silane coupling agent have significant effects on the interface properties of carbon-reinforced aluminum laminates, with the best performance observed at a content of 1%.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Multidisciplinary
Hajime Kameo, Akihiro Mushiake, Tomohito Isasa, Hiroyuki Matsuzaka, Didier Bourissou
Summary: The Pd/Ni -> Ge-F interactions supported by phosphine-chelation were found to dual activate Ge-F bonds under mild conditions, enabling catalytic Ge-C cross-coupling with fluoro germanes and achieving Germa-Suzuki reactions for the first time.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Jiaqi Chen, Ting Zhong, Xi Lu, Pan Wang, Dawei Zhang, Wei Feng, Yuxin Yang, Xin Gou
Summary: In this study, the growth kinetic process, morphology, and stability of Au@Cu2O nanostructures were controlled by employing different surface ligands. The use of CTAB resulted in relatively stable cubic nanostructures, while the use of SDS led to the formation of nanocubes that were unstable and prone to detachment. On the other hand, the use of PAA produced the most stable nanostructures with rough surfaces. This study provides an effective way to control the nanostructures and stability of metal-semiconductor heterostructures.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Zakereyya S. M. Albashaireh, Ghada A. Maghaireh, Hala N. Alsaafeen
Summary: The clinical performance of repaired composite restorations using silane coupling agent, with or without intra-oral sandblasting, showed no significant improvement after 6 months. Surface treatment with sandblasting and silane coupling agent offered marginal improvement in the clinical performance of repaired composite restorations, but the difference was not significant.
JOURNAL OF DENTISTRY
(2023)
Article
Physics, Applied
Seung Hyuk Lee, Keisuke Kitano, Takahiro Doe, Noboru Iwata, Makoto Izumi, Yasuhiko Arakawa, Tetsu Tatsuma
Summary: The ligand engineering of quantum dots is crucial for improving the performance of QD light-emitting diode displays. This study demonstrates that exchanging an organic ligand with an inorganic ligand can enhance stability and efficiency of QLED devices. The thinner ligand layer improves carrier injection efficiency, resulting in improved external quantum efficiency and device lifetime.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Composites
Oguz Eryilmaz, Erhan Sancak
Summary: The study focused on modifying epoxy resin with APTES and APMDMS to enhance interfacial adhesion between carbon fiber and matrix. Results showed that at a concentration of 0.5wt%, composites modified with APTES exhibited slightly higher mechanical properties compared to those modified with APMDMS. Silane-treated composites showed increased strength and modulus compared to untreated composites.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Textiles
Md. Ibrahim H. Mondal, Md. Khademul Islam, Firoz Ahmed
Summary: Surface finishing of cotton fiber using silane coupling agents significantly improves textile properties such as tensile strength, wear comfortness, moisture absorption and wrinkle recovery, while also enhancing thermal stability and dye penetration, ultimately resulting in increased wear comfortness.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Multidisciplinary
Xiao Peng, Jinshan Qin, Dong Huang, Zhenglin Zeng, Chao Tang
Summary: The study shows that all three silane coupling agents can enhance the thermal conductivity, thermal stability, and mechanical properties of cellulose models. Among them, KH550 is the best grafting method for the hBN/cellulose system, significantly improving thermal conductivity and glass transition temperature, as well as strengthening the toughness and resistance to deformation of cellulose.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Engineering, Chemical
Preeth Sivakumar, Surbhi Mahajan Du, Matt Selter, John Daye, Junghyun Cho
Summary: The research found that the selection of silane coupling agents with organofunctional groups similar to the coating material is crucial to improving adhesion properties, especially for PU, PU + SR, PUA, and PUA + SR coatings on tin surfaces.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Chemistry, Physical
Tinglong Liu, Yu Wang, Huan Zhang, Feng Chen, Qiang Fu
Summary: This paper investigates the modification mechanism of silane coupling agent (SCA) and the role of free silane in improving the interfacial compatibility between fillers and matrix. The degree of hydrolysis, self-polymerization, and graft coupling can be controlled by regulating the reaction conditions. The study also shows that the degree of hydrolysis and self-polymerization of free silanes significantly affect the fluidity and store stability of the modified fillers.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Zijun Yi, Xin Li, Bo Xiao, Qinghui Jiang, Yubo Luo, Junyou Yang
Summary: Defect-induced charge non-radiative recombination loss at perovskite/charge transport layers interfaces is a major issue for the efficiency and stability of flexible perovskite solar cells. This study proposes a comprehensive strategy to reduce the defect density at these interfaces, using TMPU material to improve conductivity of SnO2 and passivate the SnO2/perovskite interface defects, and TMFS layer to suppress perovskite surface defects and improve environmental stability. With this dual-interface engineering strategy, the optimized flexible and rigid PSCs achieve higher photoelectric conversion efficiency compared to the pristine devices, and the flexible device also demonstrates excellent mechanical durability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Textiles
S. Riaz, M. Ashraf, T. Hussain, M. T. Hussain, A. Younus, M. Raza, A. Nosheen
Summary: The study aimed to achieve durable functionality of cotton fabric while maintaining comfort and physical properties. TiO2 nanoparticles were modified with different silane coupling agents, applied on textiles, and confirmed through washing cycles. The effects of different silane coupling agents were compared to select the best one with minimum impact on inherent properties of cotton textiles.
FIBERS AND POLYMERS
(2021)
Article
Materials Science, Ceramics
Takuma Takahashi, Fumika Sakamoto, Junichi Tatami, Motoyuki Iijima
Summary: In situ observation of the internal structure evolution during sintering of Al2O3 green bodies using swept-source optical coherence tomography revealed changes in the density distribution and growth of coarser pores. This technique allows real-time monitoring of sintering behavior, providing insights into the development of ceramics with superior properties.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Chemistry, Physical
Motoyuki Iijima, Naoya Taki, Junichi Tatami
Summary: This study hypothesized that the real particle dynamics during shearing could be effectively revealed by combining macroscopic flow curve measurements, OCT observation, and AFM measurement. Experimental results showed that suspensions may exhibit different microscopic flow modes during flow curve measurements depending on the complexation of fatty acids to PEI.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Tsukaho Yahagi, Daisuke Kawai, Takuma Takahashi, Motoyuki Iijima, Junichi Tatami
Summary: This study investigated the electrical resistivity of Si3N4 ceramics with Yb2O3 additive by applying various voltages at different temperatures. The addition of Yb2O3 led to a lower resistivity in the Si3N4 ceramics, which decreased with increasing temperature and applied voltage. Hopping conduction through the J-phase was found to be the main reason for the decrease in resistivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Ryota Sato, Tsukaho Yahagi, Junichi Tatami, Motoyuki Iijima
Summary: A new method for rapid manufacturing of transparent SiO2 glass components using a hybridized 3D structuring approach has been reported. The method involves photo-curing, green machining, fast debinding/sintering process, and the use of interparticle photo-cross-linkable suspensions. The study demonstrates that this method can produce highly transparent SiO2 glass components with improved mechanical properties and green machinability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Motoyuki Iijima, Ryoya Arita, Yoko Fujishiro, Taichi Furukawa, Shoji Maruo, Junichi Tatami
Summary: The relationships between the processing methods of photocurable SiO2 suspensions, powder dispersion states, material processability, and the structural changes of photocured SiO2 bodies during their sintering into transparent glass components were investigated. The effects of the differences in the particle dispersion states on the real-time multi-scaled structural changes of photocured bodies during sintering were elucidated. The in-line transparency of the sintered SiO2 material was consistent with those of the microstructures observed using OCT.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Kohei Aminaka, Junichi Tatami, Motoyuki Iijima, Takuma Takahashi, Tsukaho Yahagi
Summary: In this study, high-transparency α-SiAlON ceramics were fabricated by adding various rare-earth oxides, and their effects on transparency and fluorescence were investigated. The use of Ho2O3 as an additive resulted in the lowest light scattering and highest in-line transmittance. These transparent α-SiAlON ceramics also exhibited fluorescence corresponding to different rare-earth ions.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Chemical
Yoshihiko Yamanoi, Junichi Tatami, Motoyuki Iijima
Summary: A new series of Pickering emulsions that can be photo-cured by interparticle photo-cross-linking reactions using small amounts of multifunctional acrylate (MA) monomers is proposed to rapidly manufacture complex-structured porous ceramic materials.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Yuki Otsuka, Isao Yamamoto, Motoyuki Iijima, Junichi Tatami
Summary: This study investigated the sintering behavior of green bodies molded under a strong magnetic field using the master sintering curve (MSC) theory. The results showed that the green bodies molded with a magnetic field had higher apparent activation energy during sintering and more consistent grain orientation compared to those without a magnetic field.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Kohei Aminaka, Junichi Tatami, Motoyuki Iijima, Takuma Takahashi
Summary: In this study, transparent alpha-SiAlON:Ce3+ ceramics were successfully fabricated using gas-pressure sintering technique, with Lu-alpha-SiAlON:Ce3+ ceramics displaying higher transparency and blue shift in maximum emission wavelength compared to Y-alpha-SiAlON:Ce3+ ceramics. Lower Ce concentration resulted in increased transparency and blue shift in maximum emission wavelength.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Taiki Maruyama, Masaru Mukai, Ryota Sato, Motoyuki Iijima, Mitsuki Sato, Taichi Furukawa, Shoji Maruo
Summary: This study demonstrates the production of heterogeneous 3D-printed objects with different mechanical and optical properties by controlling the microphase-separated structures through copolymerization and varying scanning speeds in a laboratory-constructed laser-scanning micro-stereolithography system. The ability to control the physical properties of 3D-printed parts has potential for functionalizing microdevices.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Ceramics
Yuki Otsuka, Isao Yamamoto, Motoyuki Iijima, Junichi Tatami
Summary: Wet-jet milling of a slurry can achieve highly oriented hydroxyapatite ceramics with anisotropy in fracture toughness.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Mariko Minami, Junichi Tatami, Motoyuki Iijima, Takuma Takahashi, Tatsuki Ohji
Summary: This study investigated the behavior of crack formation during the dewaxing process using two types of Al2O3 green bodies added with different organic binders. It was found that the type of the binder significantly affected the crack initiation and deformation behaviors of the green bodies.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Mami Tanabe, Junichi Tatami, Motoyuki Iijima, Tsukaho Yahagi, Takuma Takahashi, Hiromi Nakano, Tatsuki Ohji
Summary: The yield stress and fracture strength of beta-Si3N4 single crystals were measured by bending tests of microcantilever beam specimens. The yield stress depended on the crystal orientation, and the plastic deformation resulted from dislocations in the primary slip system {101 over bar 0}$\{ 10\bar{1}0\} $. The fracture strength ranged approximately up to 20 GPa, depending on the crystal orientation, and the fracture behavior was discussed in terms of the accumulation of dislocations.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Chemical
Fumiya Ito, Takuya Honda, Haruka Komuro, Fumitaka Yoshikawa, Junichi Tatami, Motoyuki Iijima
Summary: The flowing behavior of concentrated aqueous TiO2 suspensions was analyzed by studying the structure of polymeric dispersants, their adlayer thickness on particle surface, and particle concentrations. The results showed hysteresis characteristics of the suspension flow curves when the steric repulsive force of the polymer dispersant dominated the van der Waals attractive forces. The particle concentration dependency of the suspension viscosities followed a unified trend when the concept of relative surface distance was introduced.
Article
Materials Science, Ceramics
Hiromasa Kuroda, Junichi Tatami, Motoyuki Iijima, Takuma Takahashi
Summary: In the wet forming of ceramics, it is important to control the cracking and deformation of the ceramic slurry during drying. This study developed a combined system of OCT and TG for real-time observation of the internal structural changes in a drying SiO2 slurry. The observations revealed significant changes in OCT signal intensity due to the Brownian motion of SiO2 particles in the early stages of drying. The slurry exhibited shrinkage, loss of fluidity, and agglomeration of ceramic particles, leading to crack formation in localized dry regions.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2023)