A5034605576- Quantum Dots Synthesis And Properties
- Cardiovascular and exercise physiology
- Chalcogenide Semiconductor Thin Films
- Advanced biosensing and bioanalysis techniques
- Muscle activation and electromyography studies
- Sports Performance and Training
- Luminescence Properties of Advanced Materials
- Nanocluster Synthesis and Applications
- Heart Rate Variability and Autonomic Control
- Freezing and Crystallization Processes
- Perovskite Materials and Applications
- Optical Imaging and Spectroscopy Techniques
- Photochemistry and Electron Transfer Studies
- Hemodynamic Monitoring and Therapy
- Non-Invasive Vital Sign Monitoring
- Gold and Silver Nanoparticles Synthesis and Applications
- Exercise and Physiological Responses
- Thermoregulation and physiological responses
- Advanced Photocatalysis Techniques
- Stroke Rehabilitation and Recovery
- Physical Activity and Health
- Carbon and Quantum Dots Applications
- Photonic and Optical Devices
- Peripheral Artery Disease Management
- Muscle metabolism and nutrition
National Institute of Advanced Industrial Science and Technology
2010-2025
Tokyo Denki University
2009-2023
Tokyo Medical University
2012-2021
Ikeda Municipal Hospital
2018
Kobatake Hospital
2017
Midorigaoka Hospital
2001-2012
Kokugakuin University
2010
Osaka Electro-Communication University
2008
Universität Hamburg
2007
Tokyo University of Science
2006
Cuprous oxide quantum particles as small 2 nm (comparable to the Bohr exciton radius) were synthesized using an electrochemical route. Quantum confinement effects are evident from a blueshift in optical absorption. The absorption spectra of Cu2O nanoparticles different sizes discussed. Structural analysis by x-ray diffraction well electron shows be cubic and single phased Cu2O. X-ray photoelectron spectroscopic studies indicate presence CuO on surface core nanoparticles.
The purpose of this study was to determine whether the initial rate hemoglobin and myoglobin deoxygenation during immediate postexercise ischemia, a reflection muscle O2 consumption (VO2mus), can be quantitative measure oxidative metabolism. finger flexor muscles five healthy men (aged 25-31 yr) were monitored by 31P-magnetic resonance spectroscopy for changes in phosphocreatine (PCr), Pi, pH. Tests conducted 15 min cuff ischemia 5 submaximal isotonic grip exercise at 10, 20, 30, 40% maximal...
Fluorescence properties have been studied for Mn:ZnS crystallites with average diameter of 4 nm prepared by an aqueous colloidal method under 266 light excitation. The intensity ratio the blue band at ∼430 to orange ∼590 has decreased after preparation on a time scale hours in solution. On other hand, hyperfine structures Mn2+ electron paramagnetic resonance spectrum increased markedly same solution samples. These phenomena are attributed redistribution defect centers nanocrystals. Such not...
Increasing empirical evidence supports associations between neighborhood environments and physical activity. However, since most studies were conducted in a single country, particularly western countries, the generalizability of an international setting is not well understood. The current study examined whether perceived attributes activity differed by country. Population representative samples from 11 countries on five continents surveyed using comparable methodologies measurement...
Neighborhood environment studies of physical activity (PA) have been mainly single-country focused. The International Prevalence Study (IPS) presented a rare opportunity to examine neighborhood features across countries. purpose this analysis was to: 1) detect international typologies based on participants' response patterns an survey and 2) estimate associations between PA.A Latent Class Analysis (LCA) conducted pooled IPS adults (N=11,541) aged 18 64 years old (mean=37.5±12.8 yrs; 55.6%...
A silanization technique of hydrophobic quantum dots (QDs) was applied to SiO2-coated CdSe/CdxZn1–xS QDs precisely control the SiO2 shell thickness and retain original high photoluminescence (PL) properties QDs. Hydrophobic core–shell with PL peak wavelengths 600 652 nm were prepared by a facile organic route using oleic acid (OA) as capping agent. The silanized partially hydrolyzed tetraethyl orthosilicate replacing surface OA. These subsequently encapsulated in reverse micelles synthesis....
Abstract Photoluminescence (PL) efficiency of CdTe nanocrystals was investigated as a function the ratio surfactant (thioglycolic acid, TGA) to Cd2+ used in aqueous preparation. When 1.3, maximum PL 65% obtained. Within our knowledge, this value is highest ever reported for as-prepared solution. Surfactants added more than optimal amount tend gather densely on nanocrystals, and distort surface. This might be one explanation decrease efficiency.
Abstract When aqueously prepared CdTe nanocrystals (NCs) are coated with a SiO 2 shell containing Cd ions and sulfur source, they show drastic increase in photoluminescence (PL) efficiency significant red shift spectral narrowing after reflux. This is ascribed to the creation of hybrid structure characterized by formation CdS‐like clusters vicinity NCs shell. Since these close NCs, their effective size increases reduce quantum effect. The dependences PL properties on preparation conditions...
We exploit the synthesis of CdSe core and CdSe/CdxZn1–xS core–shell quantum dots (QDs) with spherical rod morphologies through a controlled formation single coating step by using different growth kinetics CdS ZnS. The size morphology cores depended strongly on injection speed trioctylphosphine selenium (TOPSe), reaction temperature, time. exhibited tunable photoluminescence (PL) wavelength from 544 to 623 nm. PL peak nm were prepared when TOPSe was injected slowly. molar ratio Cd/Zn upon...
The <i>Journal of Biomedical Optics</i> (JBO) is a Gold Open Access journal that publishes peer-reviewed papers on the use novel optical systems and techniques for improved health care biomedical research.
A novel and facile preparation method for layer-by-layer (LbL) self-assembled films incorporating quantum dots (QDs) having intense photoluminescence (PL) from blue to red is presented. Functional sol-gel-derived glass layers prepared by the hydrolysis of 3-aminopropyltrimethoxysilane (APS) or 3-mercaptopropyltrimethoxysilane (MPS) have been used as a linkage between QD layers. Absorption, PL spectroscopy, transmission electron microscopy, atomic force microscopy were employed...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnfrozen compartmentalized water in gels and its anomalous crystallization during warmingNorio Murase, Kinji Gonda, Tokuko WatanabeCite this: J. Phys. Chem. 1986, 90, 21, 5420–5426Publication Date (Print):October 1, 1986Publication History Published online1 May 2002Published inissue 1 October 1986https://pubs.acs.org/doi/10.1021/j100412a105https://doi.org/10.1021/j100412a105research-articleACS PublicationsRequest reuse permissionsArticle...
Highly luminescent water-soluble InP/ZnS core−shell nanocrystals were prepared using a newly developed method that incorporates reactive phase transfer and photochemical processing. Poor-emitting InP (NCs, 2−4 nm) solvothermally toluene transferred into alkaline aqueous solution containing thiol zinc ions. When these NCs in subsequently irradiated by ultraviolet (UV) light, they showed intense size-dependent photoluminescence (PL) from green to red due the formation of thick (more than 1 ZnS...
We find unique properties accompanying surface-enhanced fluorescence (SEF) from dye molecules adsorbed on Ag nanoparticle aggregates, which generate Raman scattering. The are observed in excitation laser energy dependence of SEF after excluding plasmonic spectral modulation SEF. large blue shifts spectra, deviation ratios between anti-Stokes intensity and Stokes those normal fluorescence, super-broadening returning to original by lower excitation. elucidate that these induced electromagnetic...
The redistribution of blood flow (BF) in the abdominal viscera during right-legged knee extension-flexion exercise at very low intensity [peak heart rate (HR), 76 beats/min] was examined by using Doppler ultrasound. While sitting, subjects performed a every 6 s for 20 min. BF measured upper aorta (Ao), right common femoral artery (RCFA), and left (LCFA). Visceral (BFVis) determined equation [BFAo - (BFRCFA + BFLCFA)]. A comparison with change (DeltaBF) preexercise showed greater increase...
A method including surface silanization, phase transfer and self-assembly, SiO2 shell growth has been developed to incorporate multiple hydrophobic CdSe/ZnS nanocrystals into beads where they are well suited for bio-application due their high brightness, less-cytotoxic, non-blinking nature.