Nathan S. Lewis

TL;DR: Stable intercalation compounds of the composition xN(2)·WO(3) (x = 0.034-0.039) are described, predicted to function as photoanodes that are responsive to visible light and weak electronic interactions contributed to the observed red shift in optical absorption.

TL;DR: In this paper, Amino-terminated dendrimer-carbon black composites were used for detection of volatile amines relative to non-endrimeric insulating poly(ethylene oxide)-carbon black composite composites.

TL;DR: In this paper, thin films of molybdenum diselenide have been synthesized using a two-step wet-chemical method, in which excess sodium selenide was first added to a solution of ammonium heptamolydbate in aqueous sulfuric acid, resulting in the spontaneous formation of a black precipitate that contained MDEs, MoSe3, MoO3, and elemental selenium, and after the film had been drop cast onto a glassy carbon electrode, a reductive potential was applied to the precipitate

TL;DR: The addition of PEDOT-PSS composites to an array of carbon black composite detectors can produce improved overall discrimination in a vapor sensor system when used in tasks to differentiate between of a broad set of analyte vapors.

Abstract: The reaction chemistry of H-terminated crystalline Si(111) and Si(100) surfaces in CH3OH, CD3OD, CF3(CH2)3OH, C4H9OH, and C4D9OD solutions containing ferrocenium (Fc+)−BF4, I2, or Br2 was monitored using X-ray photoelectron (XP) spectroscopy and infrared (IR) spectroscopy. Addition of the one-electron oxidant Fc+, or addition of the oxidizing species I2 or Br2, produced diagnostic changes in the IR spectra that clearly indicated formation of surficial Si−OR groups. XPS data confirmed the conclusions of the IR studies. Under our reaction conditions, no detectable reaction occurred without the presence of the oxidant. The data are consistent with oxidative activation of the surficial Si−H bonds toward nucleophilic attack by the alcohols. The reaction chemistry was generally similar on (111)- and (100)-oriented Si surfaces, although some differences were observed in the ratio of reaction products on the two different surface orientations. Alkoxylated surfaces were also prepared by a two-step process in which...