A5063819255- Lipid Membrane Structure and Behavior
- Analytical Chemistry and Sensors
- Neuroscience and Neural Engineering
- Gas Sensing Nanomaterials and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Perovskite Materials and Applications
- Conducting polymers and applications
- Minerals Flotation and Separation Techniques
- Organic Electronics and Photovoltaics
- Advanced Chemical Sensor Technologies
- TiO2 Photocatalysis and Solar Cells
- Nanopore and Nanochannel Transport Studies
- Advanced MEMS and NEMS Technologies
- Photoreceptor and optogenetics research
- Ion channel regulation and function
- Advanced biosensing and bioanalysis techniques
- Cardiac electrophysiology and arrhythmias
- Microfluidic and Capillary Electrophoresis Applications
- Supramolecular Self-Assembly in Materials
- Thin-Film Transistor Technologies
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Calcium Carbonate Crystallization and Inhibition
- Iron oxide chemistry and applications
Tohoku University
2015-2024
Spintronics Research Network of Japan
2013-2024
Analysis Group (United States)
2018
Konica Minolta (Japan)
2018
Japan Science and Technology Agency
2015-2017
Abilities In Motion
2017
Graduate School USA
2015-2016
Kawaguchi Junior College
2016
Abstract The self-assembled bilayer lipid membrane (BLM) is the basic component of cell membrane. reconstitution ion channel proteins in artificially formed BLMs represents a well-defined system for functional analysis channels and screening effects drugs that act on them. However, because are unstable, this limits experimental throughput BLM systems. Here we report formation mechanically stable solvent-free microfabricated apertures with defined nano- micro-tapered edge structures. role...
The technologies of perovskite solar cells (PSCs) have been developing rapidly. After 8 years research, the quantum efficiency PSCs based on planar sandwich structure has approaching 100% in visible light region. In order to further improve performance PSCs, adopting an integrated-back-contact (IBC) structure, which is expected be able reduce loss, a promising option. this work, numerical simulation method is, for first time, used verify applicability IBC PSCs. We investigated factors that...
The photocatalytic bactericidal activity of titanium dioxide (TiO2) thin films has been extensively studied. In this study, we investigated the activities TiO2 nanotube (NT) using Escherichia coli and Staphylococcus aureus cells as model bacteria. Metallic (Ti) were anodized on a silicon (Si) wafer substrate to form NT films. To evaluate films, bacteria irradiated with near-ultraviolet light (UV-A) at wavelength 365 nm. was estimated by survival rate derived from number live cells, which...
Our previous study showed that nanobubbles (NBs) encapsulating CO2 gas have bactericidal activity due to reactive oxygen species (ROS) (Yamaguchi et al., 2020). Here, we report bulk NBs can be efficiently generated by ultrasonically irradiating carbonated water using a piezoelectric transducer with frequency of 1.7 MHz. The were less than 100 nm in size and had lifetime 500 h. Furthermore, generation ROS the NB suspension was investigated electron spin resonance spectroscopy fluorescence...
The widely used solvent for perovskite materials, dimethylformamide (DMF), is readily adsorbed on the TiO<sub>2</sub> surface and hinders charge transfer at interface.
We investigated the bactericidal activity of bulk nanobubbles (NBs) using E. coli, a model bacterium. Bulk NBs were produced by forcing gas through porous alumina membrane with an ordered arrangement nanoscale straight holes in contact water. different contents, including CO2, O2, and N2, generated evaluated for their effects. The survival rate coli was significantly reduced suspension CO2-containing NB (CO2-NB water). N2-NB water demonstrated small amount behavior, but its impact not as...
Annealing-induced chemical and structural changes in tri-iodide mixed-halide perovskite layers were investigated to unveil different phase transformation routes layers.
Solution-processable organometal perovskite materials have been widely used in various kinds of devices. In these devices, the normally act as active layers. Grain boundaries and structural disorder layer would interfere charge transport increase recombination probability. Here we proposed a novel fabrication method to dramatically crystal size by more than 20 times compared with previously reported values. Exceptional order large crystals is illustrated nanoscale surface morphology simple...
Artificial bilayer lipid membranes (BLMs) provide well-defined systems for investigating the fundamental properties of membrane proteins, including ion channels, and screening effect drugs that act on them. However, application this technique is limited due to low stability reconstitution efficiency process. We previously reported improving BLM based fabrication microapertures having a tapered edge in SiO2/Si3N4 septa efficient channel incorporation vesicle fusion accelerated by centrifugal...
We have fabricated front-side illuminated dye-sensitized solar cells (DSSCs) with a thin film of vertically oriented TiO2 nanotubes used as the negative electrode. The nanotube was formed by anodizing metallic titanium that deposited on transparent conductive oxide (TCO) layer an intermediate, protective layer. characterized structural and electronic properties films. Titanium tetrachloride (TiCl4) treatment applied to improve performance DSSCs. investigated effects TiCl4 cell parameters...
Previously, we experimentally demonstrated that similar-sized bulk nanobubbles (NBs) preferentially coalesce when the NB size is ~100 nm. To explain this peculiar coalescence phenomenon, performed a nanoparticle trajectory analysis to determine distribution profile and time-dependent concentration of NBs generated by pressurizing porous alumina thin film with ordered straight nanoholes. Furthermore, propose physical model based on hypothesis repulsive energy increases two establish contact,...
Because of their unique structures and properties, self-assembled bilayer lipid membranes are a subject intense interest. In this Highlight Review, we summarize recent progress made in research related to membranes, including the formation stable free-standing applications artificial bilayers as model cell membrane study biological processes, new bio-hybrid devices based on membranes.
The self-assembled bilayer lipid membrane (BLM) forms the basic structure of cell and serves as a major barrier against ion movement. Ion channel proteins function gated pores that permit permeation across BLM. reconstitution in artificially formed BLMs represents well-defined system for investigating functions screening drug effects on channels. In this review, we will discuss our recent microfabrication approaches to formation stable containing potential platform next-generation systems....
Organic thin film transistors (OTFTs) have been explored because of their advantageous features such as light-weight, flexible, and large-area. For more practical application organic electronic devices, it is very important to realize OTFTs that are composed only materials. In this paper, we fabricated p+-i-p+ type in which an intrinsic (i) regioregular poly (3-hexylthiophene) (P3HT) layer used the active highly doped p-type (p+) P3HT source drain electrodes. The...
We report on a novel lipid bilayer system, in which lateral bias can be applied addition to conventional transmembrane voltage. Freestanding membranes (BLMs) doped with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) were formed microaperture, around metal electrodes deposited. Using this it was possible modulate and amplify photoinduced currents by applying along the BLM. The results indicate that microfabricated Si chip embedded is promising platform for formation of transistor-like...
We have investigated modification of TiO 2 surfaces with [6,6]-phenyl-C 61 -butyric acid (PCBA) used for fabrication /poly(3-hexylthiophene-2,5-diyl) (P3HT) hybrid solar cells. The surface process was monitored using in-situ infrared absorption spectroscopy in the multiple-internal reflection geometry (MIR-IRAS). IR data showed that longer exposure to an organic solution PCBA leads undesirable formation a physisorbed overlayer cannot be removed by rinsing pure solvent. found ultrasonic...