Article
Chemistry, Physical
Jose Luis Pura, Coral Salvo-Comino, Cristina Garcia-Cabezon, Maria Luz Rodriguez-Mendez
Summary: The use of nanomaterials as electrode modifiers allows for various approaches to enhance electrode performance. The control and understanding of the interaction between the modifiers and the electrode are crucial. The combination of EC-AFM and Langmuir-Blodgett technique provides a comprehensive analysis of the modified electrodes.
SURFACES AND INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Mateusz Michal Tomczyk, Masafumi Minoshima, Kazuya Kikuchi, Agata Blacha-Grzechnik, Zbigniew Starosolski, Rohan Bhavane, Mariusz Zalewski, Nikodem Kuznik
Summary: The attachment of functional molecules to single-walled carbon nanotubes (SWCNTs) using aryl diazonium salt chemistry can enhance their near-infrared emission. In this study, sp(3) defects were created on (6,5) SWCNTs using aryl diazonium salt of fluorescein. The pH was found to affect the grafting process, with pH 5-6 being necessary for a successful reaction. The modified SWCNTs exhibited red-shifted NIR emission due to luminescent sp(3) defects, as well as visible fluorescence from attached fluorescein molecules.
Article
Chemistry, Multidisciplinary
Violeta Alvarez-Venicio, Martin Caldera-Villalobos, Rafael Arcos-Ramos, Jaime Octavio Guerra-Pulido, Emmanuel de la O-Cuevas, Victor Velazquez, Margarita Rivera, Vladimir A. Basiuk, Maria del Pilar Carreon-Castro
Summary: This study investigated the photophysical properties of BTD derivatives with triphenylmethyl and triphenylsilyl groups, showing larger Stokes shifts and quantum yields above 0.5 in solution. The formation of Langmuir monolayers at the air-water interface and the potential use of these derivatives in photoelectronic applications were also highlighted.
Article
Chemistry, Multidisciplinary
Gentiana Hasani, Avni Berisha, Dardan Hetemi, Philippe Decorse, Jean Pinson, Fetah I. Podvorica
Summary: This study focuses on modifying the surface of cheap lignite powder with alkyl or mixed alkyl-aryl layers. By using specific aqueous acid solutions, the researchers successfully attached alkyl or aryl films to the lignite surface. The stability of the interface during the grafting reactions was confirmed through theoretical calculations. Additionally, steric hindrance of aryl diazonium salts did not prevent them from reacting with the coal surface by abstracting iodine or bromine atoms.
Article
Chemistry, Physical
Michal Swierczewski, Alexis Chenneviere, Lay-Theng Lee, Plinio Maroni, Thomas Buergi
Summary: The Langmuir-Blodgett (LB) technique enables precise deposition of gold nanoparticles and nanoclusters onto solid substrates. This study investigated the formation and structure of LB films and introduced a new method for measuring the mechanical properties of ultrathin films.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Koji Yamamoto, Yoshihiro Miyauchi, Masanari Hirahara, Yasushi Umemura
Summary: The Langmuir film formation behavior of a long hydrocarbon chain trimethylammonium cation (C(30)TMA(+)) was investigated. Methanol was added to weaken the hydrophobic interactions between the hydrocarbon chains. It was found that the surface pressure at the collapse point decreased with increasing methanol concentration, indicating the weakening of the hydrophobic interaction.
Article
Chemistry, Inorganic & Nuclear
Takuro Ikeuchi, Ryota Kudo, Tatsuya Yoshii, Nagao Kobayashi, Yu Kitazawa, Mutsumi Kimura
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2020)
Article
Energy & Fuels
Takuro Ikeuchi, Ryota Kudo, Yu Kitazawa, Shogo Mori, Mutsumi Kimura
Article
Chemistry, Physical
Inseong Cho, Long Zhao, Joseph Mapley, Sayedmohsen Shahshahan, Pawel Wagner, Keith C. Gordon, Peter C. Innis, Mutsumi Kimura, Shogo Mori, Attila J. Mozer
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Multidisciplinary Sciences
Kazunori Miyamoto, Shodai Narita, Yui Masumoto, Takahiro Hashishin, Taisei Osawa, Mutsumi Kimura, Masahito Ochiai, Masanobu Uchiyama
NATURE COMMUNICATIONS
(2020)
Article
Biochemistry & Molecular Biology
Ryota Kudo, Masahiro Sonobe, Yoshiaki Chino, Yu Kitazawa, Mutsumi Kimura
Article
Chemistry, Multidisciplinary
Eugenio H. Otal, Manuela Leticia Kim, Steffen Dietrich, Ryogo Takada, Shinji Nakaya, Mutsumi Kimura
Summary: The study developed an open-source system for fluoride detection in natural water, utilizing a reaction on cotton substrates to reduce manipulation of reagents and operator errors, while transferring data to a cell phone to avoid battery use.
Article
Chemistry, Multidisciplinary
Eugenio Hernan Otal, Hideki Tanaka, Manuela Leticia Kim, Juan Paulo Hinestroza, Mutsumi Kimura
Summary: This study developed a sensor for water quality assessment based on lanthanide-based metal-organic frameworks and cotton, providing strong emission and high sensitivity. The modified cotton was characterized through various techniques to understand the attachment of Tb-BTC to cotton, leading to the development of a fluoride demonstrator sensor suitable for water analysis under international regulations.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Letter
Multidisciplinary Sciences
Kazunori Miyamoto, Shodai Narita, Yui Masumoto, Takahiro Hashishin, Taisei Osawa, Mutsumi Kimura, Masahito Ochiai, Masanobu Uchiyama
NATURE COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Eugenio H. Otal, Manuela L. Kim, Juan P. Hinestroza, Mutsumi Kimura
Summary: The study introduces a tunable solid-state approach to modify the acidity of cotton using citric, oxalic, and fumaric acids. By adjusting temperature and reaction time, the surface acidity can be controlled. It was found that the surface acidity strength is closely related to the adsorption kinetics of the dye on the modified cotton.
Article
Materials Science, Multidisciplinary
Manuela L. Kim, Eugenio H. Otal, Junko Takizawa, Nina R. Sinatra, Kelly Dobson, Mutsumi Kimura
Summary: In this study, knittable shape-memory polymeric fibers were extruded using a 3D-printer nozzle-based melt-spinning method, allowing for high throughput composition and condition testing. These fibers were utilized to create electroactive shape-changing knitted textiles, and can be incorporated into various textile architectures. The physical properties of the shape-memory fibers were influenced by the manufacturing process parameters, and a scalable strategy for bicomponent filament production was presented. The knitted textiles can be deformed from two-dimensional to three-dimensional structures by applying a voltage, and can be returned to their original shape by heating and applying stress.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Takahiro Kawata, Masahiro Sonobe, Dai Morikawa, Yu Kitazawa, Yasushi Nomura, Masanobu Uchiyama, Mutsumi Kimura
Summary: The covalent linkage of phenanthrene units at 9 and 10 positions resulted in a broadening of the absorption band and a red-shift of the fluorescence band in ethanol compared with its monomer. Spatial stacking of phenanthrene units also altered the spectral shape of phosphorescence emission, and the oligomer film emitted phosphorescence at room temperature.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Manuela L. Kim, Eugenio H. Otal, Nina R. Sinatra, Kelly Dobson, Mutsumi Kimura
Summary: The use of non-metallic conductive yarns in wearable technologies requires washable fibers that can withstand domestic washing without losing their conductive properties. A one-pot coating with PEDOT:PSS conductive polymers was applied to polyester submicron fibers to improve water resistance and washability. The composites showed similar mechanical properties as the parent fibers, indicating that the coating and post-treatment did not affect overall mechanical property.
Article
Polymer Science
Satsuki Yoshida, Takeshi Shii, Yu Kitazawa, Manuela L. Kim, Eugenio H. Otal, Yoshiyuki Hattori, Mutsumi Kimura
Summary: In this study, we investigate the nanofiltration performance of poly(p-xylylene) thin films with imidazole side chains deposited onto commercial polyethersulfone ultrafiltration membranes using a chemical vapor deposition process. The resulting thin films, with a thickness of a few tens of nanometers, demonstrate water permeability under a pressure difference of 0.5 MPa, selectively rejecting water-soluble organic dyes based on their molecular sizes. Furthermore, the imidazole-containing poly(p-xylylene) films form thin flake-like ZIF-L crystals on the surface, and the composite films show the ability to adsorb methylene blue molecules within the cavities of ZIF-L.
Article
Biotechnology & Applied Microbiology
Eugenio Hernan Otal, Manuela Leticia Kim, Yoshiyuki Hattori, Yu Kitazawa, Juan Paulo Hinestroza, Mutsumi Kimura
Summary: This study reports a post-synthetic functionalization method of metal organic frameworks for detecting fluoride in water, with high yield, reduced reagent costs, and minimal by-products. Among them, a Rhodamine B functionalized Al-BDC-NH2 metal organic framework was identified as particularly suitable for fluoride detection in water.
BIOENGINEERING-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Yoshiaki Chino, Takashi Nakanishi, Mutsumi Kimura
NEW JOURNAL OF CHEMISTRY
(2020)
