The role of low-pressure RF plasma in the inactivation of Escherichia coli O157, Klebsiella pneumoniae, Proteus mirabilis, and Enterobacter sakazakii using N2-O2 and SF6 gases was assessed. 1×109 colony-forming units (CFUs) of each bacterial isolate were placed on three polymer foils. The effects of pressure, power, distance from the source, and exposure time to plasma gases were optimized. The...

Let's play dominoes with SF6: The photoredox catalytic activation of SF6 in the presence a-substituted styrenes and alkynols initiates a reaction sequence that consecutively forms C−O bond, C−C bond C−SF5 one after another. Finally, this domino yields pentafluorosulfanylated oxygen-containing heterocycles single step. These new compounds bear complex structure broaden scope building blocks for ...

The determination of trace water in gas samples, such as isobutene, chloromethane (polymeric staple gases) and SF6 by a conventional Karl Fischer coulometer is very difficult, because of the adsorption of trace water on the surface of sample pipe, the gasification of the liquefied samples, and the migration of moisture into the measuring cell from the surroundings. To solve these problems, we i...

We performed a direct measurement of the avalanche charge with a 10 10 cm prototype resistive plate chambers with a 0.2 cm gas gap. We studied its behaviour with respect to the high voltage and its dependence on the presence of the SF6 in the gas mixture (C2H2F4/i-C4H10/SF6 in the ratio 95/4/1 and 96/4/0). The measurements showed a double exponential behaviour of the average avalanche charge wi...

We report a limit on the fractional temporal variation of the proton-to-electron mass ratio as 1/(m(P)/m(e)) partial differential/partial differential(t)(m(P)/m(e))=(-3.8+/-5.6) x 10(-14) yr(-1), obtained by comparing the frequency of a rovibrational transition in SF6 with the fundamental hyperfine transition in Cs. The SF6 transition was accessed using a CO2 laser to interrogate spatial 2-phot...

[1] Surface emissions of SF6 are closely tied to human activity and thus fairly well known. They therefore can and have been used to evaluate tropospheric transport predicted by models. A range of new atmospheric SF6 data permit us to expand on earlier studies. The purpose of this first of two papers is to characterize known and new transport constraints provided by the data and to use them to ...

The formation of a TSV for three-dimensional interconnects using SF6/O2 plasma is explored. Adjusting the O2 gas concentration to 45 sccm, while the SF6 concentration is set to 35 sccm, produced the best combination of chemical and physical etching to provide sidewall angles of 88◦. Three TSV aspect ratios are etched (5/58, 10/100, and 20/100 μm) and subsequently analyzed using the finite eleme...