Short-Channel Field Effect Transistors with 9-Atom and 13-Atom wide Graphene Nanoribbons

Posted by klaurent Berkeley

Kavli Affiliate: Eli Yablonovitch | Summary:Bottom-up synthesized GNRs and GNR heterostructures have promising electronic properties for high performance field effect transistors (FETs) and ultra-low power devices such as tunnelling FETs. However, the short length and wide band gap of these GNRs have prevented the fabrication of devices with the desired performance and switching behaviour. Here, […]


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High purity NaI(Tl) scintillator to search for dark matter

Posted by klaurent Tokyo

Kavli Affiliate: Kunio Inoue | Summary:A high purity and large volume NaI(Tl) scintillator was developed to search for cosmic dark matter. The required densities of radioactive impurities (RIs) such as U-chain, Th-chain are less than a few ppt to establish high sensitivity to dark matter. The impurity of RIs were effectively reduced by selecting raw […]


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Si K Edge Structure and Variability in Galactic X-Ray Binaries

Posted by klaurent MIT

Kavli Affiliate: Claude Canizares | Summary:We survey the Si K edge structure in various absorbed Galactic low-mass X-ray binaries (LMXBs) to study states of silicon in the inter- and circum-stellar medium. The bulk of these LMXBs lie toward the Galactic bulge region and all have column densities above $10^22$ cm$^-2$. The observations were performed with […]


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Spectroscopic Studies of the Physical Origin of Environmental Aging Effects on Doped Graphene

Posted by klaurent Caltech

Kavli Affiliate: N. C. Yeh |Summary:The environmental aging effect of doped graphene is investigated as a function of the organic doping species, humidity, and the number of graphene layers adjacent to the dopant by studies of the Raman spectroscopy, x-ray and ultraviolet photoelectron spectroscopy, scanning electron microscopy, infrared spectroscopy, and electrical transport measurements. It is […]


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