Alternating multilayer films composed of titania nanosheets and Zn porphyrins were prepared by use a previously reported Langmuir-Blodgett film-transfer method in order to fabricate photoelectrochemical devices. Closely packed nanosheet monolayers on indium tin oxide (ITO), mica, quartz surfaces strongly adsorbed cationic [5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrinatozinc]4+ (ZnTMPyP4+) electrostatic interactions. The alternating deposition process afforded nanometer-scale with...

We have measured directly the thermal conductance between electrons and phonons in ultrathin Hf Ti films at millikelvin temperatures. The experimental data indicate that electron–phonon coupling these is significantly suppressed by disorder. electron cooling time τε follows T−4 dependence with a record-long value τε=25 ms T=0.04 K. hot-electron detectors of far-infrared radiation, fabricated from such films, are expected to very high sensitivity. noise-equivalent power detector area 1 μm2...

Varistors are passive, two-terminal solid state semiconductor devices that used to provide over-voltage or over-current protection electrical and electronic circuits. Metal-oxide varistors (MOVs) typically made up of a durable ceramic material, which protects them against sudden surges high current energy. However, there some drawbacks MOVs, such as having short life span large dynamic resistance. NAMICS has developed solvent-less epoxy paste shown non-linear properties sustained...

Various volatile organic compounds can be found in human transpiration, breath and body odor. In this paper, a novel two-dimensional fluorometric imaging system, known as "sniffer-cam" for ethanol vapor released from palm skin was constructed validated. This system measures concentrations intensities of fluorescence through an enzymatic reaction induced by alcohol dehydrogenase (ADH). The consisted multiple ultraviolet light emitting diode (UV-LED) excitation sheet, ADH enzyme immobilized...

Described are two types of direct-detection flat-panel X-ray detectors utilizing amorphous selenium (a-Se) and cadmium telluride (CdTe). The a-Se detector is fabricated using direct deposition onto a thin film transistor (TFT) substrate, whereas the CdTe novel hybrid method, in which pre-deposited glass substrate then connected to TFT substrate. array format 512 X with pixel pitch 150 micrometer. imaging properties both have been evaluated respect sensitivity, lag, spatial resolution,...

Understanding concentration distributions, release sites, and dynamics of volatile organic compounds (VOCs) from the human is expected to lead methods for noninvasive disease screening assessment metabolisms. In this study, we developed a visualization system (sniff-cam) that enabled one identify spatiotemporal change gaseous acetaldehyde (AcH) in real-time. AcH sniff-cam was composed camera, UV-LED array sheet, an alcohol dehydrogenase (ADH)-immobilized mesh. A reverse reaction ADH employed...

X-ray detectors that we developed utilizing polycrystalline CdZnTe films exhibited superior sensitivity, but inadequate temporal response and output uniformity for medical imaging purposes. In order to improve those deficiencies, tested new procedures deposition post-deposition chemical-heat treatment of films, in addition investigating device structures. We doped the with Cl a manner so as achieve effective grain boundary passivation. Polycrystalline were Cl-doped by our procedure found...

In recent years, attention has been increasingly devoted to the development of rescue robots that can protect humans from inherent risks work. Particularly, anticipated is a robot move deeply through small spaces. We have our peristalsis, movement mechanism used by earthworms. A reinforcement learning technique for derivation pattern, Q-learning, was develop three-segmented peristaltic crawling with motor drive. Characteristically, peristalsis provide capability if at least three segments...

Purpose The purpose of this paper is to describe a mechanical equilibrium model one‐end‐fixed type rubberless artificial muscle and the feasibility for control muscle. This expresses relation between inner pressure, contraction force, displacement. validity usability were confirmed experimentally. Design/methodology/approach Position antagonistic drive system was conducted using model. contributes adjustment force. Findings derived shows static characteristics well. Furthermore, it...

The thermal properties of micron scale particles are an important factor in the design composite materials and other applications. Here we present optical technique based on frequency domain thermoreflectance (FDTR) that is capable measuring conductivity individual a few microns across. In addition, can provide values for particle's effective volume which new capability compared to conventional FDTR applied multilayer samples. We also show explain response systems constrain heat flow along...

Abstract Novel water-dispersible, pH-stable, and biocompatible quantum dots were synthesized through the surface modification of silicon (SiQDs) with monosaccharides. The presence monosaccharide on SiQDs was recognized by fluorescence measurements using its complementary lectin (concanavalin A). cell imaging carried out functionalized chemically d-glucosamine, it shown that developed in this study are applicable as blue chromophores for biological imaging.

Abstract The influence of low‐level silver (Ag) additions (0.12 and 0.5 wt%) to magnesium alloy AZ91 were studied in terms electrochemical response hardness. These properties reconciled with microstructural analyses, indicating that 0.12 wt% Ag was capable imparting an increment hardness, no significant increase corrosion kinetics, whilst resulted formation Mg 4 phase which increased cathodic kinetics concomitant lowered

A gas-imaging system (sniff-cam) that allows fluorometric visualization of a two-dimensional (2-D) distribution gaseous acetaldehyde (AcH) was developed. It employed reverse reaction nicotinamide adenine dinucleotide (NADH) dependent enzyme led to consumption NADH in reaction. The constructed with highly sensitive camera, an ultraviolet light emitting diode array sheet, two band pass filters and alcohol dehydrogenase (ADH)-immobilized mesh used for AcH detection. the ADH catalyzed reduction...

Structural and optical properties of silicon nanowires synthesized by metal‐assisted chemical etching are investigated. Macroscopic nanowire arrays as well microscopic photoluminescence (PL) Raman scattering spectra single studied. The morphology changes depending on duration concentration H 2 O in the solution. In thick having small length large diameter, red PL appears. Typical diameter 90 μm 600 nm, respectively. spectrum is composed two bands with peaks at 635 705 nm. thin their ratio...

In cases when epoxy resin is used as underfill, its volumetric shrinkage and elastic modulus increase during the curing process generate stress, which often leads to inferiorities such deformations or cracks in packaging. Therefore it quite important grasp variation of properties properly analyze stress based on reliable data. However, almost impossible directly measure itself. Therefore, this report we tried predict from process. To cure, made use ARES-G2, a rheometer by TA Instruments...

In this study, we are going to report on development of conductive copper paste curable in air. The was prepared by a simple and facile method using powder with resin additives such as tri-ethanolamine (TEA) liquid fatty acid. screen-printed an alumina substrate, then cured at 210°C for 10 min air obtain product. resistivity the product less than 6.0 × 10-5 Ω∙cm. Without additives, 7.1 10-4 Ω∙cm, it higher case additives. These results indicate that TEA acid interact each other paste, is...

We made a prototype flat-panel X-ray detector with polycrystalline CdZnTe film, and evaluated its imaging performance respect to leakage current, sensitivity, MTF, DQE image lag. The incorporates novel hybrid technique in which zinc-doped CdTe is pre-deposited onto ceramic substrate then connected TFT circuit substrate. carefully selected the material for sensor order avoid both incident x-ray attenuation micro-cracks film. film thickness was approximately 300 micrometers . area composed of...

Pressure enhancement due to conically convergent shocks is experimentally demonstrated in the composite cylinder assembly made of materials with different shock velocities and impedances. The formation Mach configuration leads a remarkable energy accumulation central part cylinder. pressure achieved 2024 Al-copper 122.5 GPa an impact velocity 2.1 km/s copper flyer, which about 2.4 times greater than that expected from standard condition. application technique recovery experiments for...

Background and aims – Interest in understanding the factors driving change alien plant species richness along elevation has been increasing. This knowledge assists risk of invasions general mechanisms determining patterns native flora. In addition, recent land use changes within mountainous regions are expected to affect plants elevation. However, few reliable datasets have revealed temporal distribution this study, we evaluated regional pattern an elevational gradient compared with that...