Kenji Okada

ORCID: 0000-0003-2176-693X
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About
Contact & Profiles
Research Areas
  • Metal-Organic Frameworks: Synthesis and Applications
  • X-ray Diffraction in Crystallography
  • Surface Modification and Superhydrophobicity
  • Adhesion, Friction, and Surface Interactions
  • Advanced Sensor and Energy Harvesting Materials
  • Block Copolymer Self-Assembly
  • Advanced Photocatalysis Techniques
  • Pigment Synthesis and Properties
  • Magnetism in coordination complexes
  • Analytical Chemistry and Chromatography
  • Advanced Nanomaterials in Catalysis
  • Crystallography and molecular interactions
  • Dendrimers and Hyperbranched Polymers
  • Various Chemistry Research Topics
  • Mesoporous Materials and Catalysis
  • Aerogels and thermal insulation
  • Silicone and Siloxane Chemistry
  • Dyeing and Modifying Textile Fibers
  • Advanced Fiber Optic Sensors
  • Crystallization and Solubility Studies
  • Boron and Carbon Nanomaterials Research
  • Molecular spectroscopy and chirality
  • Advanced biosensing and bioanalysis techniques
  • Surface Chemistry and Catalysis
  • Thermal and Kinetic Analysis

Osaka Metropolitan University
2022-2025

Metropolitan University
2025

Japan Science and Technology Agency
2019-2023

Osaka Prefecture University
2012-2022

Graduate School USA
2015-2021

Suita Municipal Hospital
2017-2018

Osaka University
1975-2018

Fukuoka Hospital
2003-2010

Kumamoto University
2008

Fujikura (United States)
2006

Abstract The precise alignment of multiple layers metal–organic framework (MOF) thin films, or MOF‐on‐MOF over macroscopic length scales is presented. films are fabricated by epitaxially matching the interface. first MOF layer (Cu 2 (BPDC) , BPDC=biphenyl‐4,4′‐dicarboxylate) grown on an oriented Cu(OH) film a “one‐pot” approach. Aligned second (BDC) BDC=benzene 1,4‐dicarboxylate, Cu (BPYDC) BPYDC=2,2′‐bipyridine‐5,5′‐dicarboxylate) can be deposited using liquid‐phase epitaxy. co‐orientation...

10.1002/anie.201901707 article EN Angewandte Chemie International Edition 2019-03-29

A new approach for the fabrication of homogeneous HKUST‐1 [Cu 3 (BTC) 2 ] coatings on copper metal plates, 3D objects, and as patterns, is here proposed. The conversion can be performed at room temperature in approximately 30 minutes using an aqueous ethanolic mixture. two step mechanism occurs via formation Cu(OH) nanotubes. Microscopic time‐course monitoring reveals steps. adhesion organic‐framework (MOF) crystals, well functional properties resulting supported catalyst, are successfully...

10.1002/adfm.201303303 article EN Advanced Functional Materials 2013-12-04

A Cu-based metal–organic framework (HKUST-1) was synthesized from insoluble precursors and positioned using sol–gel based coatings.

10.1039/c4qi00215f article EN cc-by-nc Inorganic Chemistry Frontiers 2015-01-01

Enhanced electrochemical performance of LiFePO4 for Li-ion batteries has been anticipated by anion doping at the O-site rather than cation Fe-site. We report on S-doped nanoparticles synthesized a solvothermal method using thioacetamide as sulfur source. S-doping into matrix expands lattice due to larger ionic radius S2- that O2-. The parameters and b increase around 0.2% with content, while c remains almost unchanged only 0.03% increase. also contributes suppression antisite defects (Fe...

10.1039/c7ra12740e article EN cc-by RSC Advances 2018-01-01

Abstract The precise alignment of multiple layers metal–organic framework (MOF) thin films, or MOF‐on‐MOF over macroscopic length scales is presented. films are fabricated by epitaxially matching the interface. first MOF layer (Cu 2 (BPDC) , BPDC=biphenyl‐4,4′‐dicarboxylate) grown on an oriented Cu(OH) film a “one‐pot” approach. Aligned second (BDC) BDC=benzene 1,4‐dicarboxylate, Cu (BPYDC) BPYDC=2,2′‐bipyridine‐5,5′‐dicarboxylate) can be deposited using liquid‐phase epitaxy. co‐orientation...

10.1002/ange.201901707 article EN Angewandte Chemie 2019-03-29

Orientation-controlled Cu<sub>2</sub>(Linker)<sub>2</sub>DABCO MOF films on macroscopic scales are fabricated for the development of high-performance devices; direction 1D nanochannels is controllable either perpendicular or parallel to substrates.

10.1039/d0sc02958k article EN cc-by-nc Chemical Science 2020-01-01

Multilayered metal–organic frameworks (MOF) thin films, called MOF-on-MOF generate integrated and multiple functionalities toward high-performance sensing, electrochemical, optical devices. Although epitaxy at the MOF/MOF interfaces in these multilayered MOF films plays a crucial role for high functionalities, effect of structural consistency molecular scale epitaxial interface on quality (e.g., crystallite size degree orientation films) has not been explored. Here, we report factors...

10.1021/acsanm.0c03462 article EN cc-by-nc-nd ACS Applied Nano Materials 2021-03-03

Composites of DNA and gold nanoparticles are expected to be stimuli-responsive photo-functional materials that can synergistically utilize both the stimuli-responsiveness derived from optical properties nanoparticles. However, conventional methods require bottom-up synthesis artificial modified with functional groups such as thiols form chemical bonds nanoparticles, which limits flexible design resulting composite. Therefore, we conceived idea introducing a "linker" interact bases naturally...

10.2320/matertrans.mt-y2024010 article EN cc-by-nc-nd MATERIALS TRANSACTIONS 2025-01-01

Ethanol (EtOH) is a ubiquitous compound with critical applications across various industries, necessitating accurate and reliable sensing for sanitation, quality control, environmental monitoring. Chromism‐based sensors, known their simplicity, portability, real‐time detection capabilities, have faced limitations in EtOH due to insufficient sensitivity, low selectivity, irreversibility, color perception. Herein, groundbreaking solvato/vapochromism‐based sensor utilizing Cu‐based...

10.1002/smsc.202400634 article EN cc-by Small Science 2025-02-22

Abstract Endoscopy, a crucial, minimally invasive medical procedure, is poised for significant advancements in the integration of cutting‐edge optical technologies. Although rare‐earth‐doped single‐crystal phosphors offer high‐luminance white light at their endoscope tips via external excitation wavelength conversion element, cost, toxicity, and complex fabrication processes limit widespread adoption. This study presents novel approach to development biocompatible, cost‐effective endoscopic...

10.1002/admi.202401015 article EN cc-by Advanced Materials Interfaces 2025-03-17

A titanate nanotube (TNT) film is demonstrated to provide a switchable and adhesive hydrophobic surface. The surface adhesivity reversibly switched from repellent by mild heating spontaneous rehydration. persistent superhydrophobic/superhydrophilic pattern can be fabricated on the TNT films coated soft substrates.

10.1039/c3ta13536e article EN Journal of Materials Chemistry A 2013-10-29

Oriented film and pattern of TCNQ@Cu 3 (BTC) 2 (HKUST-1) fabricated via epitaxial growth exhibit anisotropic electrical properties toward MOF-based (flexible) thin-film smart device applications, such as transistors thermoelectric thin films.

10.1039/d1ta02968a article EN cc-by-nc Journal of Materials Chemistry A 2021-01-01

Abstract The degree of pore filling is an important parameter for defining guest@MOF properties in applications including electronics, optics, and gas separation. However, the interplay key aspects host–guest interactions, such as a quantitative description guest alignment or structural integrity host function are yet to be determined. Polarisation‐dependent infrared spectroscopy attenuated total reflection configuration combined with sorption allowed simultaneously study orientation...

10.1002/anie.202201725 article EN cc-by-nc Angewandte Chemie International Edition 2022-04-27

The development of metal-organic framework (MOF) thin films with various functionalities has paved the way for research into a wide variety applications. MOF-oriented can exhibit anisotropic functionality in not only out-of-plane but also in-plane directions, making it possible to utilize MOF more sophisticated However, oriented been fully exploited, and finding novel should be cultivated. In present study, we report first demonstration polarization-dependent plasmonic heating film embedded...

10.1039/d2na00882c article EN cc-by-nc Nanoscale Advances 2023-01-01

Metal–organic framework (MOF) coatings were prepared on gold electrodes through the conversion from Cu(OH)<sub>2</sub> nanobelts to Cu<sub>3</sub>(BTC)<sub>2</sub> MOFs.

10.1039/c7ce00416h article EN CrystEngComm 2017-01-01

Polarization-dependent infrared spectroscopy of oriented metal organic framework films fills the information gap left by diffraction methods and gives access to orientation aromatic linker initial ultra-thin films.

10.1039/d1sc02370e article EN cc-by-nc Chemical Science 2021-01-01

The high-quality 3D-oriented thin film of metal-organic frameworks (MOFs) with improved optical transparency will pave the way to integrate MOFs into advanced and electrical devices.

10.1039/d4nr01885k article EN cc-by-nc Nanoscale 2024-01-01

The hetero-nanocomposite of Zn(OH)<sub>2</sub> and Ga(OH)<sub>3</sub> NPs is crystallized to ZnGa<sub>2</sub>O<sub>4</sub> with CO<sub>2</sub> affinity, showing highly-selective reaction toward photo-reduction.

10.1039/d0ra00710b article EN cc-by RSC Advances 2020-01-01

A novel approach for thermo-responsive wettability has been accomplished by surface roughness change induced thermal expansion of paraffin coated on titanate nanostructures. The exhibits and reversible in a hydrophobic regime; the shows superhydrophobicity with contact angles ∼157° below 50 °C ∼118° above due to decrease caused thermally-expanded at higher temperatures. Reversible ∼40° angle allows fast multi-directional droplet transport. present affords versatile selection materials wide...

10.1039/d0ra05471b article EN cc-by-nc RSC Advances 2020-01-01
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