Article
Engineering, Electrical & Electronic
M. Tobise, S. Saito
Summary: Metastable alpha ''-Fe16N2 is considered a good candidate as a semi-hard magnetic material, and in this study, it was found that only when M=Al and V were used as substitution elements for Fe, the desired nanoparticles could be obtained. This suggests the importance of the substitution elements in the synthesis process.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Engineering, Electrical & Electronic
M. Tobise, S. Saito
Summary: The metastable alpha ''-Fe16N2 is a candidate for rare earth-free semi-hard magnetic materials, but the magnetocrystalline anisotropy needs to be improved. Substitution of Fe with elements such as Co, Ni, Mn, and Al has been studied to enhance the magnetocrystalline anisotropy through theoretical calculations and thin-film experiments.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Materials Science, Multidisciplinary
Sajjad Ur Rehman, Liang Qiao, Ruibiao Zhang
Summary: This manuscript reports new NdPrFeB/Alnico nanocomposite magnetic materials with enhanced Curie temperatures and maximum magnetic energy products. The Curie temperature of the composite alloys is enhanced by adding low-grade Alnico, and the molecular field penetration improves the temperature stability of the magnets. The maximum energy product is enhanced and the magnetostatic and exchange interactions in the alloys were studied.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ghulam Abbas, Saba Maqbool, Muhammad Khuram Shahzad, Muhammad Afzaal, Muhammad Usama Daud, Nazma Goher Fatima, Abdul Ghuffar
Summary: Hyperthermia is a technique used to treat malignancies by raising the temperature of defective tissues. This study explores the use of gold nanoparticles (AuNPs) for hyperthermia treatment, finding that nanorods achieve the highest temperature compared to other shapes, highlighting their effectiveness in this process. The research delves into the effects of nanoparticle shape and surface coating on thermal absorption in hyperthermia, underlining the significance of Au NPs in this treatment.
Article
Materials Science, Multidisciplinary
Natarajan Prabakaran, Paulpandian Muthu Mareeswaran, Poovan Shanmugavelan
Summary: This study successfully enhances the dispersion ability of curcumin in water by incorporating it into the silica shell formed on the surface of iron oxide. The interaction with DNA is investigated to explore its potential applications in living organisms.
Article
Polymer Science
Yen-Zen Wang, Yu-Wei Cheng, Lin-Chia Ho, Wen-Yao Huang, Ko-Shan Ho, Yu-Ting Syu
Summary: Oleic acid-modified Fe3O4 nanoparticles were successfully covered with polyanilines through inverse suspension polymerization, resulting in the formation of superparamagnetic ferrite and α''-Fe16N2 mixture at high temperature. The magnetic saturation of the calcined iron-composites slightly decreases after 3 months of storage, but remains relatively high.
Article
Nanoscience & Nanotechnology
Yuhuan Qin, Mingming Hao, Jiaqi Wang, Rusheng Yuan, Zhaohui Li
Summary: This study demonstrates an efficient strategy of fabricating superior photocatalytic systems by a rational coupling of plasmonic Au NPs and photocatalytic active MOFs into a core-shell structured nanocomposite. The resulting nanocomposite shows improved photocatalytic performance under visible light, generating more active radicals. The removal of the capping agent further enhances the photocatalytic performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Sofia Mares-Bou, Maria-Antonia Serrano, Jose Antonio Gomez-Tejedor
Summary: Electrospun membranes were developed for controlled drug release with different coating structures. The morphology of the fibers was analyzed and different release rates were obtained for the coated fibers, making them suitable for various applications.
Article
Materials Science, Ceramics
Shixiang Dong, Jing Li, Ning Li, Shuai Zhang, Bo Li, Qianli Zhang, Liqin Ge
Summary: Fe/C core-shell nanofibers were prepared by coaxial electrospinning and high-temperature carbonization. The core-shell structure was maintained after carbonization and Fe nanoparticles were distributed within the carbon nanofibers. The electromagnetic properties, matching characteristics, and electromagnetic wave absorption properties of the Fe/C nanofibers were affected by the microscopic morphology and crystallinity of the carbon components.
CERAMICS INTERNATIONAL
(2023)
Article
Oncology
Xiaohan Xu, Jianan Wu, Zhitao Dai, Rui Hu, Yaoqin Xie, Luhua Wang
Summary: This study investigates the sensitization properties of magnetic gold nanoparticles (Fe3O4@AuNPs) in radiotherapy. The results show that under a magnetic field, Fe3O4@AuNPs can enhance the synergistic efficiency in radiotherapy and photothermal therapy, making them potential effective sensitization materials.
FRONTIERS IN ONCOLOGY
(2022)
Article
Engineering, Multidisciplinary
Mohamed A. Ali, Mahmoud F. Mubarak, Mohamed Keshawy, Mohamed A. Zayed, Mohamed Ataalla
Summary: In this study, PS-DVB/Fe3O4 nanocomposite was successfully synthesized using in situ chemical polymerization process, characterized by various techniques. The addition of Fe3O4 significantly enhanced the adsorption capacity of PS-DVB for Tartrazine, with a removal efficiency of 98%. The breakthrough properties of the adsorption technique were investigated by adjusting parameters such as liquid flow rate, initial Tartrazine concentration, and bed height.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Pharmacology & Pharmacy
Alma Martin, Jun Cai, Anna-Lena Schaedel, Mariena van der Plas, Martin Malmsten, Thomas Rades, Andrea Heinz
Summary: This study aims to develop fibers with enhanced mechanical strength and water stability, as well as sustained release of tetracycline hydrochloride. By using zein as core material and polycaprolactone as shell material, the researchers achieved improved cell attachment and wound closure, while maintaining continuous drug release.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2022)
Article
Chemistry, Physical
Ji Ho Kang, Yong Jun Park, Ji Ho Hong, Jun Woo Choi, Dong Hun Kim
Summary: This study proposes a method for modulating the microstructure, composition, and magnetic properties of metal-metal oxide thin films fabricated by co-sputtering. The method has the potential to be used in multifunctional electronics. Detailed microstructural and compositional analysis reveals the presence of self-assembled core-shell structured nanocomposites.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Ling He, Shuang Cao, Wensheng Li, Qizheng Dong, Weimin Sun
Summary: In this study, YAG/Al2O3/ZrO2 composite fibers were successfully prepared by electrospinning method, and the effects of spinning process parameters on fiber structure and morphology were investigated. The results showed that the composite fibers had a smooth surface, single crystal core-shell structure, and were obtained under specific process conditions.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2021)
Article
Engineering, Environmental
Asiyeh Kheradmand, Hossein Ghiasinejad, Shahrzad Javanshir, Ali Khadir, Edris Jamshidi
Summary: A novel core-shell magnetic rhamnolipid-Co/Al layered double hydroxide nanocomposite was prepared for the elimination of ibuprofen from wastewater. The research confirmed excellent adsorption capability of MRL-Co/Al LDH for IBP.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Correction
Chemistry, Multidisciplinary
Fitri Aulia Permatasari, Fitriyanti Nakul, Tirta Rona Mayangsari, Akfiny Hasdi Aimon, Bebeh Wahid Nuryadin, Satria Zulkarnaen Bisri, Takashi Ogi, Ferry Iskandar
Summary: This article corrects the study by Fitri Aulia Permatasari et al. titled "Solid-state nitrogen-doped carbon nanoparticles with tunable emission prepared by a microwave-assisted method" published in RSC Adv.
Article
Materials Science, Multidisciplinary
Reza Umami, Fitri Aulia Permatasari, Diva Addini Maghribi Muyassiroh, Arum Sinda Santika, Citra Deliana Dewi Sundari, Atthar Luqman Ivansyah, Takashi Ogi, Ferry Iskandar
Summary: By combining nitrogen and oxygen surface functional groups, carbon dots (CDs) with a first near infrared (NIR) window absorption were successfully synthesized. The study showed that the carbonyl group (C = O) and N-pyrrolic configuration in CDs effectively down-shifted the energy gaps and provided excited electrons for absorption.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Tue Tri Nguyen, Youhei Toyoda, Nur Syakirah Nabilah Saipul Bahri, Annie M. Rahmatika, Kiet Le Anh Cao, Tomoyuki Hirano, Katsuo Takahashi, Yohsuke Goi, Yuko Morita, Mai Watanabe, Takashi Ogi
Summary: In this study, Carbodilite was used as a cross-linker to improve the water resistance of TOCN particles. The presence of polycarbodiimide significantly increased the water resistance of cross-linked TOCN particles.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Tomoyuki Hirano, Takama Tsuboi, Kiet Le Anh Cao, Eishi Tanabe, Takashi Ogi
Summary: Niobium-doped tin oxide (NTO) nanoparticles were prepared by spray flames, which exhibited high specific surface area and good performance as catalyst support in fuel cells. The characteristics and performances of the NTO nanoparticles were evaluated, revealing their potential for fuel cell applications.
JOURNAL OF NANOPARTICLE RESEARCH
(2023)
Article
Chemistry, Physical
Fitri Aulia Permatasari, Reza Umami, Citra Deliana Dewi Sundari, Tirta Rona Mayangsari, Atthar Luqman Ivansyah, Fahdzi Muttaqien, Takashi Ogi, Ferry Iskandar
Summary: Through integrated experimental and computational studies, the influence of pyrrolic-N concentration and position on the absorption of pyrrolic-N-rich carbon dots was comprehensively elucidated. It was found that a mid-site pyrrolic-N is generated after the pyrrolic-N concentration exceeds 10%, while edge-site pyrrolic-N induces a frontier orbital hybridization, reducing bandgap energy. This study sheds light on the design and optimization of pyrrolic-N-rich carbon dots for the first near infrared window responsive materials in biomedical applications.
Article
Chemistry, Multidisciplinary
Phong Hoai Le, Kiet Le Anh Cao, Yasuhiko Kitamoto, Tomoyuki Hirano, Takashi Ogi
Summary: By studying the formation and framework thickness of macroporous three-way catalyst (TWC) particles synthesized using the template-assisted aerosol process, it was found that the template concentration played a crucial role in maintaining the macroporous structure and controlling the framework thickness between the macropores. The increase in template concentration can reduce the framework thickness of the nanoporous material and improve the mass transfer coefficient.
Article
Chemistry, Physical
Thi Thanh Nguyen Ho, Tomoyuki Hirano, Ryosuke Narui, Hiroshi Tsutsumi, Miho Kishi, Yusuke Yoshikawa, Kiet Le Anh Cao, Takashi Ogi
Summary: The flame aerosol process was used to synthesize a chain-like structure catalyst support comprising low-loading iridium-iridium oxide species (Ir-IrO2/TiO2). The Ir-IrO2/TiO2 particles containing 10 wt % IrO2 showed much lower volume resistivity than TiO2 particles, indicating improved conductivity. The membrane electrode assembly (MEA) based on the developed Ir-IrO2/TiO2 catalyst support exhibited remarkable stability after 20 min testing at a voltage of 1.7 V.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Tue Tri Nguyen, Nur Syakirah Nabilah Saipul Bahri, Annie M. Rahmatika, Kiet Le Anh Cao, Tomoyuki Hirano, Takashi Ogi
Summary: Porous pectin particles have been synthesized as drug carriers using indomethacin as a model drug, with improved specific surface areas compared to nonporous particles. The porous structure shortens the diffusion path and improves the release rate of drug molecules, resulting in a three times faster drug release rate compared to nonporous particles.
ACS APPLIED BIO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Delyana Ratnasari, Eka Lutfi Septiani, Kiet Le Anh Cao, Tomoyuki Hirano, Nobuhiro Okuda, Hiroyuki Matsumoto, Takashi Ogi
Summary: Submicron-sized FeNi@SiO2 particles with precisely controllable shell thickness were successfully synthesized in this study using a swirler connector-assisted spray pyrolysis system. The thickness of the SiO2 shell can be tuned by adjusting the parameter conditions, and the fabrication method consistently yielded a high coating ratio of more than 94%. The study also investigated the particle formation process and emphasized the importance of controlling the preheater and SiO2 supplied amount.
Article
Nanoscience & Nanotechnology
Phong Hoai Le, Shunki Yamashita, Kiet Le Anh Cao, Tomoyuki Hirano, Nao Tsunoji, Duhaul Biqal Kautsar, Takashi Ogi
Summary: This study focused on developing TWC particles with a hierarchically ordered macroporous structure using a template-assisted spray method. The synthesized catalyst particles exhibited better catalytic performance due to the enhanced mass transfer efficiency induced by the macropores.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Muhammad Alief Irham, Oktaviardi Bityasmawan Abdillah, Darul Roni Rodiansyah, Fakhrian Hanif Tejo Baskoro, Haerul Fahmi, Takashi Ogi, Ferry Iskandar
Summary: In this study, a high-performance FeS2 supercapacitor was synthesized by incorporating polyvinylpyrrolidone (PVP) to solve the limitations of FeS2. PVP prevented dendritic expansion and acted as a binding material, while facilitating a one-step synthesis process. The FeS2/PVP nanocomposite exhibited superior electrochemical properties with high specific capacity and energy density.
DALTON TRANSACTIONS
(2023)
Review
Engineering, Chemical
Kiet Le Anh Cao, Ferry Iskandar, Eishi Tanabe, Takashi Ogi
Summary: The development of energy storage devices is crucial for the utilization of sustainable energy sources in the future. Novel carbon-based materials, such as nanostructured carbon spheres, have gained significant attention for their potential applications as high-performance electrode materials in rechargeable batteries and supercapacitors. This comprehensive review summarizes recent advances in the synthesis and applications of nanostructured carbon spheres, highlighting the challenges and future research directions in controlling their structure and properties for practical applications.
KONA POWDER AND PARTICLE JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Phong Hoai Le, Yasuhiko Kitamoto, Shunki Yamashita, Kiet Le Anh Cao, Tomoyuki Hirano, Tareq W. M. Amen, Nao Tsunoji, Takashi Ogi
Summary: In recent years, transportation-related air pollution has become a global concern. This study focused on the development of a three-way catalyst (TWC) technology to reduce harmful emissions. The researchers synthesized macroporous TWC particles with different macropore sizes and found that the size of the macropores significantly affected the catalytic performance of the TWC structures. The study proposed a plausible mechanism to explain the influence of macropore size on the diffusion efficiency within the structures.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Nur Syakirah Nabilah Saipul Bahri, Tue Tri Nguyen, Tomoyuki Hirano, Kouhei Matsumoto, Mai Watanabe, Yuko Morita, Takashi Ogi
Summary: This study explores the use of oxazoline-containing polymers as cross-linking agents to improve the water stability of TOCN particles while preserving their particle shape. The results demonstrate that the oxazoline-cross-linked TOCN particles have good stability in water and can be used in practical applications.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Eka Lutfi Septiani, Jun Kikkawa, Kiet Le Anh Cao, Tomoyuki Hirano, Nobuhiro Okuda, Hiroyuki Matsumoto, Yasushi Enokido, Takashi Ogi
Summary: The characteristic of the secondary particles in the powder core is crucial to the performance of the inductor. By controlling the temperature and residence time of the spray pyrolysis process, the size and structure of the FeNi particles can be altered to enhance their magnetic characteristics and particle density, leading to improved DC bias characteristics.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
