The integration of high-speed light emitters on silicon chips is an important issue that must be resolved in order to realize on-chip or interchip optical interconnects. Here, we demonstrate the first electrically driven ultrafast carbon nanotube (CNT) emitter based blackbody radiation with a response speed (1-10 Gbps) more than 10(6) times higher conventional incandescent and either comparable light-emitting diodes laser diodes. This explained by extremely fast temperature CNT film, which...

Abstract Donor–π–acceptor fluorophores that consist of an electron‐donating amino group and electron‐accepting triarylborane moiety generally exhibit substantial solvatochromism in their fluorescence while retaining high quantum yields even polar media. Herein, we report a new family this compound class, which bears ortho ‐P(=X)R 2 ‐substituted phenyl groups (X=O or S) as photodissociative module. The P=X intramolecularly coordinates to the boron atom undergoes dissociation excited state,...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereocontrolled total synthesis of (-)-anisatin: a neurotoxic sesquiterpenoid possessing novel spiro .beta.-lactoneHaruki Niwa, Masanori Nisiwaki, Itaru Tsukada, Takeshi Ishigaki, Shigeki Ito, Kazumasa Wakamatsu, Tatsuya Mori, Megumi Ikagawa, and Kiyoyuki YamadaCite this: J. Am. Chem. Soc. 1990, 112, 24, 9001–9003Publication Date (Print):November 1, 1990Publication History Published online1 May 2002Published inissue 1 November...

Abstract In order to investigate the viscoelastic‐plastic properties of polymer solids and construct a constitutive equation for them, torsional tests were performed on polypropylene (PP) hollow cylinders. Testing was conducted under constant strain rate, abrupt change stress relaxation, creep, cyclic loading conditions. The experimental data compared with numerical results derived from an overstress model. It is shown that theory explains PP well, provided current not below maximum previous strain.

A method for the synthesis of single-phase powdered InOF under ambient pressure has been developed. The involves pyrolysis a hydrate InF3 in an O2 atmosphere controlled humidity. Various intermediate phases were formed during pyrolysis, and their structures interconversions analyzed. Combined results optical absorption measurements density functional calculations indicate that is direct band gap material with energy ∼3.7 eV. Unlike In2O3, electrical conductivity polycrystalline pellets can...

While the range of accessible borylenes has significantly broadened over last decade, applications remain limited. Herein, we present tricoordinate oxy-borylenes as potent photoreductants that can be readily activated by visible light. Facile oxidation CAAC stabilized (CAAC)(IPr

Friction stir welding is enable to fabricate dissimilar materials joint which difficult for conventional fusion welding. Thus, the method promising way multi-material structure achieving weight reduction and high functionalization. Lap with spot weld (0D shape), butt linear line (1D shape) curved (2D were achieved between aluminum steel. From study, shape change of influence on heat input, material flow, process window The weldability 3D was investigated by friction girth (AA6063) steel...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereocontrolled synthesis of polyfunctionalized trans-hydrindan systems: a model study toward anisatinHaruki Niwa, Tatsuya Mori, Takashi Hasegawa, and Kiyoyuki YamadaCite this: J. Org. Chem. 1986, 51, 7, 1015–1018Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 1986https://doi.org/10.1021/jo00357a013RIGHTS & PERMISSIONSArticle Views633Altmetric-Citations16LEARN ABOUT THESE METRICSArticle...

Abstract Organic semiconductors are indispensable functional materials for next‐generation printed electronics, and significant progress has been made in the development of high‐mobility organic recent years. Most these molecules rely on use linearly π‐extended polycyclic heteroaromatic systems, referred to as heteroacenes, core. Here, expand scope rational design semiconductors, a new series U‐shaped heteroacenes that features unprecedented “U” geometric configuration together with...

We have estimated the pharmacokinetic and pharmacodynamic interactions of verapamil (VP) enantiomers also interaction between VP its metabolite, norverapamil (NVP). ECGs conscious rabbits were studied to determine pharmacokinetics racemic NVP in relation their prolongation effect on PR intervals, which used as an index VP’s antiarrhythmic effect. Plasma free fractions showed constant values at concentrations ranging from 0.022 1.10 μM. There no or NVP. The pharmacological S-enantiomer...

We present the oxidative transformation of a corrole isomer, namely, dibenzocorrorin ( 3 ), featuring modified connectivity pattern bipyrrole moieties within scaffold, resulting in formation pyrrole-embedded...

Semiconductor nanocrystals smaller than 10 nm, known as quantum dots (QDs), exhibit optoelectronic properties that are dependent on their size due to the effect. Recently, QDs made of I-III-VI group multinary semiconductors, such CuInS 2 and AgInS , have attracted significant attention for potential in highly efficient solar energy conversion systems. This is because these were composed less toxic elements optical broadly tuned visible near-IR wavelength regions through chemical composition....

Abstract Donor–π–acceptor fluorophores that consist of an electron‐donating amino group and electron‐accepting triarylborane moiety generally exhibit substantial solvatochromism in their fluorescence while retaining high quantum yields even polar media. Herein, we report a new family this compound class, which bears ortho ‐P(=X)R 2 ‐substituted phenyl groups (X=O or S) as photodissociative module. The P=X intramolecularly coordinates to the boron atom undergoes dissociation excited state,...

With AKARI, we carried out near-infrared spectroscopy of the nearby barred spiral galaxy, NGC 1097, categorized as Seyfert 1 with a circumnuclear starburst ring. Our observations mapped galactic center region. As result, obtain spatial distributions polycyclic aromatic hydrocarbon <TEX>$3.3{\mu}m$</TEX> and aliphatic <TEX>$3.4-3.6{\mu}m$</TEX> emission. The former is detected from all observed regions latter enhanced near bar connecting ring nucleus. In addition, detect absorption features...

Friction stir lap welding (FSLW) between SPC270 steel sheet and A6061 aluminum alloy were investigated with the effect of tilt angle plunge depth tool. Tilt 3 degree improved material flow suppressed generation defect in weld. The weld strength increased tool achieved maximum value 212 MPa at 0.15 mm depth. From TEM observation, uniform reaction layer 450 nm was formed on interface. On interface, probe rotation movement fabricated bead like structure surface hook cross section. Although...

Abstract Obwohl sich das Spektrum verfügbarer Borylene in den letzten zehn Jahren erheblich erweiterte, sind ihre Anwendungen nach wie vor limitiert. In dieser Arbeit präsentieren wir dreifach koordinierte Oxyborylene als potente Photoreduktionsmittel, die durch sichtbares Licht aktiviert werden können. Die Einelektronenoxidation der CAAC‐stabilisierten (CAAC)(IPr 2 Me )BOR (R=TMS, CH C 6 H 5 , (4‐F)C 4 ) zu entsprechenden Radikalkationen wird mit Ferroceniumionen Oxidationsmittel...

Electrically driven high-speed light emitters based on compound semiconductors are widely used in the areas of optical communication, time-resolved spectroscopy, etc. However, because their large footprints, low crystal-linity grown directly Si wafers, these face significant challenges with respect to integration silicon-based electronics, photonics and micromechanical platforms. Single-walled carbon nanotubes (CNTs) an attractive material for optoelectronic applications, such as optically...

Dissimilar materials welding between A6061 and SPC270 thin sheets was performed through friction stir lap the effects of tool shape clearance were investigated. The process carried out on 3-axis vertical machining center without tilt angle, using tools with flat or scroll shoulder surfaces. highest tensile shear strength 208.2 MPa achieved under rotation speed 2000 rpm 500 mm/min. Groove-like defects found at advancing side this joint, which thought to be caused by deficiency plastic...