Article
Nanoscience & Nanotechnology
Chiseon Ryu, Hwangjae Lee, Hohyeon Kim, Seong Hwang, Yaser Hadadian, Ayeskanta Mohanty, In-Kyu Park, Beongki Cho, Jungwon Yoon, Jae Young Lee
Summary: We synthesized magnetic IONP/polymer nanocomposites (MNCs) by embedding IONPs in a poly(L-lactic acid) (PLA) matrix via nanoemulsion. The MNCs showed enhanced heating efficiency with over two-fold increase compared to nonembedded bare IONPs. In addition, the MNCs exhibited good colloidal stability under physiological conditions and maintained their heating efficiency during 48 h of incubation in cell culture medium.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2022)
Article
Chemistry, Physical
Toyin Shittu, Mohammednoor Altarawneh
Summary: This study investigates the mechanism and pathways of methanethiol decomposition on a defect CeO2 surface using density functional theory calculations. The results provide a detailed atomistic understanding of the desulfurization capacity of ceria surfaces.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Jennifer A. Cooper, Arindam Malakar, Michael Kaiser
Summary: The study investigates the mechanisms underlying nutrient retention in biochar amended soil. It reveals that aging processes in the soil lead to the self-functionalization of biochar surfaces with iron oxides, which explains the increased nitrate retention and decreased leachate phosphate and dissolved organic carbon after biochar surface functionalization. The findings emphasize the importance of identifying optimal soil conditions for this surface functionalization to enhance nutrient retention and resource efficiency in agroecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Diego A. Flores-Cano, Noemi-Raquel Checca-Huaman, Isabel-Liz Castro-Merino, Camila N. Pinotti, Edson C. Passamani, Fred Jochen Litterst, Juan A. Ramos-Guivar
Summary: Novel magnetic nanohybrids composed of nanomaghemite covered by organic molecules were successfully synthesized at room temperature. The characterization results revealed the presence of different magnetic phases and controlled-size morphologies. Organic functionalization of the nanoparticles was demonstrated, and the nanohybrids showed potential applications in effluent remediation and biomedicine.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
Sung Ho Lee, Bong Su Kang, Moon Kyu Kwak
Summary: This study introduces a magneto-responsive actuating surface that can control both the wettability and optical transmittance of surfaces. By applying magnetic force, the water contact angle and optical transmittance can be controlled, and a sliding angle control system is implemented. The interesting characteristics of this study are expected to have wide applications in fields such as optics, surface self-cleaning systems of solar cells, and smart windows.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Lorenzo Cursi, Silvia Vercellino, Mura M. McCafferty, Emily Sheridan, Vanya Petseva, Laurent Adumeau, Kenneth A. Dawson
Summary: Magnetic nanoparticles are valuable tools for studying complex intracellular bio-nano interactions. By synthesizing biocompatible multifunctional nanoparticles with fluorescent properties, intracellular tracking of nanoparticles can be achieved, providing a promising approach for studying bio-nano interactions.
Article
Chemistry, Multidisciplinary
Ji Qian, Yang Ha, Krishna Prasad Koirala, Di Huang, Zhi Huang, Vincent S. S. Battaglia, Chongmin Wang, Wanli Yang, Wei Tong
Summary: This study reports the synthesis of a highly fluorinated Li-excess cation-disordered rock salts (DRX) cathode, Li1.2Mn0.6Ti0.2O1.8F0.2, based on cost-effective and earth-abundant transition metals via a solid-state reaction. The fluorinated DRX cathode using an ammonium fluoride precursor exhibits uniform particle size, delivering a specific discharge capacity of 233 mAh g(-1) and specific energy of 754 Wh kg(-1), with 206 mAh g(-1) retained after 200 cycles. The study demonstrates the potential to develop next-generation cost-effective DRX cathodes with enhanced capacity retention for high-energy Li-ion batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Keaton Prather, Jonathan T. Stoffel, Emily Y. Tsui
Summary: This perspective discusses how reduction, oxidation, and electrostatics on the surface of colloidal semiconductor nano-crystals (NCs) contribute to their electronic properties, including photoluminescence quenching or brightening and shifts in band edge potentials. It highlights recent efforts in combining spectroscopic, electrochemical, and computational methods to characterize redox-active surface sites and trap states and explores future opportunities in this field.
CHEMISTRY OF MATERIALS
(2023)
Review
Chemistry, Analytical
Marzhan Sypabekova, Aidan Hagemann, Donggee Rho, Seunghyun Kim
Summary: Surface functionalization and bioreceptor immobilization are crucial processes for developing a sensitive and selective biosensor. The silanization process using 3-aminopropyltriethoxysilane (APTES) on oxide surfaces is commonly used due to its bifunctional nature and low cost. This review provides an overview of APTES deposition methods, categorized into solution-phase and vapor-phase, and a comprehensive guide for creating stable APTES monolayers on oxide surfaces for biosensing applications.
Article
Chemistry, Multidisciplinary
Pohlee Cheah, Paul Brown, Jing Qu, Bin Tian, Derek L. Patton, Yongfeng Zhao
Summary: This paper presents a facile one-pot strategy for versatile surface functionalization and precise size control of iron oxide nanoparticles, which can be applied in biomedical fields. The synthesis method allows surface modification with different coating materials to introduce new surface functionalities. The nanoparticles with surface ligands exhibit outstanding stability and improved sensitivity in aqueous solution, showing potential for biological applications.
Article
Chemistry, Multidisciplinary
Saruta Deeprasert, Lilin Wang, Konstantinos Simeonidis, Nguyen Thi Kim Thanh, Etienne Duguet, Stefanos Mourdikoudis
Summary: The study describes a synthesis method for nanocomposites composed of silica nanoparticles decorated with magnetic maghemite nanoparticles on their surface dimples, for use in detecting and recovering arsenic in water. The process involves amination and carboxylation to graft the maghemite nanoparticles onto the silica nanoparticles, resulting in magnetic nanocomposites suitable for environmentally friendly arsenic detection and removal. This approach shows promise in the field of environmental remediation.
Article
Astronomy & Astrophysics
Simone Albanesi, Alessandro Nagar, Sebastiano Bernuzzi, Andrea Placidi, Marta Orselli
Summary: This paper assesses the performances of different analytical prescriptions for the EOB radiation reaction on different orbits. Comparing with exact numerical results, it is found that the NCN prescription is the most accurate, showing robust agreement for eccentric and hyperbolic orbits as well as for large eccentricities. The direct comparison of EOB/NR fluxes is proposed as a more stringent and informative test to select the best prescription. An improved radiation reaction, NCN2PN, is also proposed in this study.
Review
Chemistry, Multidisciplinary
Mohamad Zandieh, Juewen Liu
Summary: The article discusses the issue of calculating catalytic turnover rates of nanozymes, emphasizing that only surface atoms should be considered as active sites. Different types of nanozymes exhibit varying catalytic activity characteristics, which may be influenced by the adsorption of reaction products.
Article
Chemistry, Physical
Amber N. Rose, Eshani Hettiarachchi, Vicki H. Grassian
Summary: Chemical contaminants and their interactions with geochemical interfaces play a significant role in water quality. This study investigates the interactions between monoethanolamine and titanium dioxide and iron oxide, revealing the influence of pH, concentration, and ionic strength on adsorption behavior. The results provide insights into the mechanisms of interaction between MEA and oxide surfaces at different pH values.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Nikki J. Bakas, Michael L. Neidig
Summary: The use of iron catalysts in carbon-carbon bond forming reactions provides a cost-effective and less toxic alternative to precious metal catalysts with different reactivity. While well-defined ligands like N-heterocyclic carbenes and phosphines are effective, additives such as N-methylpyrrolidone, N,N,N',N'-tetramethylethylenediamine, and iron salts can also enhance product yields by altering speciation. However, the roles and mechanisms of these additives are often unclear compared to well-defined iron ligands.
Article
Chemistry, Analytical
Takashi Hiroi, Sadaki Samitsu, Hideaki Kano, Kunie Ishioka
Summary: A pulsed dynamic light scattering (DLS) system, combining a sub-nanosecond pulsed laser with a software-based detection system, has been developed for potential applications in nonlinear DLS with molecular selectivity. The distortion of the time correlation function and underestimation of particle size due to the clipping effect in the photon counting module have been successfully calibrated using theoretical simulation. The effective removal of random noises has also been demonstrated through time gating synchronized to the laser pulses.
ANALYTICAL SCIENCES
(2022)
Article
Materials Science, Biomaterials
Zizhen Liu, Takuya Kataoka, Sadaki Samitsu, Daisuke Kawagoe, Motohiro Tagaya
Summary: The study successfully synthesized spherical and negatively charged Cit/HA nanoparticles to achieve highly transparent Cit/HA films. By controlling the sizes and shapes of the hybrid nanoparticles, the research demonstrated the formation of uniform transparent films with nanospaces, improving their dispersibility in water. This approach provides a simple way to achieve transparent nanoparticle film formation for biomedical applications.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Article
Nanoscience & Nanotechnology
Takuya Kataoka, Takumi Hashimoto, Sadaki Samitsu, Zizhen Liu, Motohiro Tagaya
Summary: By changing the Ca/P molar ratio, we successfully controlled the coordination states of citric acid molecules on europium ion-doped hydroxyapatite nanoparticles and investigated their effect on the photoluminescence properties.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Chemical
Masako Uematsu, Kento Ishii, Sadaki Samitsu, Edhuan Bin Ismail, Izumi Ichinose, Naoki Ohashi, David Berthebaud, Jean-francois Halet, Takamasa Ishigaki, Tetsuo Uchikoshi
Summary: Zeolite bulk bodies with macropores, mesopores, and micropores were prepared using ZSM-5 raw powder as the starting material. The use of starch particles as a pore-forming agent allowed for the control of the internal porous structure. The presence of mesopores was characterized by N2 gas adsorption/desorption measurement, while the macroporous structure was observed using confocal laser fluorescent microscopy.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Iori Yamada, Takuya Kataoka, Ryota Ikeda, Sadaki Samitsu, Motohiro Tagaya
Summary: Methylene blue-immobilized hydroxyapatite nanoparticles were successfully synthesized by changing the initial P/Ca molar ratio. The immobilized amount of methylene blue increased with an increase in the initial P/Ca molar ratio. The shape of the hydroxyapatite nanoparticles remained elliptical, irrespective of the initial P/Ca molar ratio. The findings suggest that the initial P/Ca molar ratio can effectively control the interfacial interactions between methylene blue and the hydroxyapatite surface.
INORGANIC CHEMISTRY
(2022)
Article
Polymer Science
Sadaki Samitsu, Sirawit Pruksawan, Hideaki Yokoyama, Izumi Ichinose
Summary: This study comprehensively investigated the effects of 13 good solvents for polystyrene and the polystyrene concentration on the fabrication process. It was found that solvents with high boiling-point-to-melting-point ratios can yield uniformly sized mesoporous polystyrenes at an appropriate polystyrene concentration, while solvents with medium boiling-point-to-melting-point ratios form bimodal mesopores. Additionally, a low polystyrene concentration in the fabrication method can result in hierarchical structures composed of mesopores and macropores.
Article
Materials Science, Multidisciplinary
Xinyan Zhang, Cunfang Zhang, Ren Guo, Song Chen, Jianan Zhang, Xiaona Li, Toshiyuki Ikoma, Weiyi Chen
Summary: TiO2 nanoparticle (NP) compacts were used as supportive substrates for the synthesis of TiO2 nanowires (NWs) with controlled diameter via an alkali hydrothermal route. The hydrothermal treatment converted the TiO2 NPs on the compacts to TiO2 NWs. The diameter of each NW could be adjusted by changing the hydrothermal temperature and reaction time. The NWs grown on the compacts showed better stability in aqueous solution compared to those grown on conventional Ti metals. In vitro biocompatibility evaluation demonstrated that the NWs supported cell attachment and proliferation, with smaller diameter NWs showing enhanced effects. The synthesized TiO2 NWs have potential as novel biocompatible tissue regenerative matrix.
MATERIALS TECHNOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Iori Yamada, Kota Shiba, Tania Guadalupe Penaflor Galindo, Motohiro Tagaya
Summary: Theranostics, a combination of therapeutics and diagnostics, has gained attention for reducing the burden on patients. Calcium phosphate (CP) is a promising material for theranostics due to its biocompatibility and ability to be functionalized with drug molecules and rare earth ions for photoluminescence. Understanding the interaction between CP and photofunctional species and drug molecules is crucial. Well-designed photofunctional CPs can be highly-functional or multifunctional theranostic materials at the nanoscale. This review focuses on the hybridization of CPs with europium(III) ion and methylene blue molecule for theranostic applications.
Review
Chemistry, Analytical
Yadong Chai, Yanni Zhou, Motohiro Tagaya
Summary: The highly-oriented structures in biological tissues are important for tissue function. Understanding the mechanism and developing techniques for controlling the oriented structure of nanobiomaterials is crucial for artificially fabricating similar nanostructures.
Article
Materials Science, Ceramics
Ren Guo, Congcong Rong, Song Chen, Jianan Zhang, Akiyoshi Osaka, Toshiyuki Ikoma, Xiaona Li, Weiyi Chen
Summary: In this study, chitosan/Fe3O4/TiO2@TiO2 nanowire microspheres with extracellular matrix-like fibrous surface and photothermal antibacterial property were synthesized. The microspheres significantly enhanced the attachment and proliferation of human umbilical vein endothelial cells and exhibited photothermal antibacterial activity due to the presence of nanofibrous surface and Fe3O4 component.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Yuta Aida, Yasuhiro Nakagawa, Tetsuo Kishi, Toshiyuki Ikoma
Summary: This study investigated the identification of star-shaped Au-Ag nanoparticles with spinous morphology using discrete dipole approximation and morphological symmetric consideration. By varying the Au/Ag ratio, nanoparticles with different aspect ratios and number of spines were obtained and their morphology was identified by comparing the optical absorption spectra with the calculated absorption efficiency. Taking the particle size distribution into consideration improved the calculation accuracy. In conclusion, this study demonstrated the potential of computational morphological identification in predicting nanoparticles with complexed morphology.
Article
Chemistry, Multidisciplinary
Kota Shiba, Chao Zhuang, Kosuke Minami, Gaku Imamura, Ryo Tamura, Sadaki Samitsu, Takumi Idei, Genki Yoshikawa, Luyi Sun, David A. Weitz
Summary: A simple device made of polydimethylsiloxane (PDMS) slab and a glass substrate can measure gas flow and analyze its characteristics based on color change. This device can also be used for flow-induced display of patterns.
Article
Chemistry, Inorganic & Nuclear
Reo Kimura, Kota Shiba, Kanata Fujiwara, Yanni Zhou, Iori Yamada, Motohiro Tagaya
Summary: In this study, a method for controlling the morphology of a calcium phosphate (CP) coating on silica-titania (SiTi) porous nanoparticles was developed. It was demonstrated that controlled surface roughness of CP coatings could be achieved using SiTi nanoparticles with a well-defined spherical shape, uniform size, and tunable nanoporous structure in simulated body fluid (SBF). The pore size distribution of SiTi nanoparticles significantly influenced the surface morphology of the CP coating in SBF immersion, with bimodal pore sizes leading to rough surfaces and a unimodal pore size maintaining smooth surfaces.
Review
Engineering, Multidisciplinary
Kazuto Sugimoto, Yanni Zhou, Tania Guadalupe Penaflor Galindo, Reo Kimura, Motohiro Tagaya
Summary: This review examines the influence of added ions and surface states on the biocompatibility of hydroxyapatite (HA). HA is a calcium phosphate found in biological hard tissues and has been extensively studied for its osteogenic properties. The chemical composition and crystalline structure of HA can change based on synthetic methods and added ions, affecting its biocompatibility. The importance of surface characteristics and hydration layers for controlling biomedical function and improving biocompatibility is highlighted. Understanding these properties can provide insights into bone formation and regeneration mechanisms.
Article
Engineering, Chemical
Sadaki Samitsu, Edhuan Ismail, Yoshihisa Fujii, Izumi Ichinose
Summary: High-density crosslinked polymer membranes with a thickness of several tens of nanometers were prepared using chemical vapor deposition (CVD) of propylamine (PA). The membranes had a composition of C3.0H4.7N0.8O0.4 and contained various functional groups. The pore sizes of the membranes were found to be 0.3-0.7 nm, and their porosity was approximately 10%. The study demonstrated the ability to tune the thickness, pore size, porosity, and density of these hydrophilic crosslinked membranes by adjusting the CVD parameters.
JOURNAL OF MEMBRANE SCIENCE
(2023)