Zinc oxysulfide, Zn(O,S), films grown by atomic layer deposition were annealed in oxygen to adjust the carrier concentration. The electron carrier concentration of Zn(O,S) can be reduced by several orders of magnitude from 10 to 10 cm 3 by post-deposition annealing in oxygen at temperatures from 200 C to 290 C. In the case of Zn(O,S) with S/Zn1⁄4 0.37, despite the considerable change in the ele...

Chemical-Looping Combustion (CLC) has been suggested among the best alternatives to reduce the economic cost of CO2 capture using fuel gas because CO2 is inherently separated in the process. As gaseous fuels it can be used natural gas, refinery gas or syngas from coal gasification, which may 2 contain different amounts of sulfur compounds, such as H2S and COS. An experimental investigation of t...

We report on the characterization of gettered p-type GaP substrates for application in high-efficiency multijunction solar cells. A commercial zinc-doped GaP substrate was divided, with one piece soaked in a phosphorussaturated gallium-aluminum melt at 975 C. Low-temperature continuouswave photoluminescence indicated a significant decrease in deep-level impurity peaks due to oxygen and zinc-oxy...

Photodynamic therapy using hematoporphyrin and its derivatives is clinically useful for cancer treatments. It has been reported that cancer cells incorporate hematoporphyrin and its derivatives via heme carrier protein 1, which is a proton-coupled folate transporter. However, the mechanism of this protein expression has not been elucidated. In general, the concentration of reactive oxygen speci...

The syngas chemical looping (SCL) process developed at the Ohio State University can efficiently convert coal derived syngas into hydrogen with in-situ CO2 capture. In this novel process, two moving bed units are used to convert syngas into hydrogen through the assistance of an oxygen carrier particle. A third unit, an entrained bed combustor, is used to convey the oxygen carrier particles to c...

The facile ability of iron to gain and lose electrons has made iron an important participant in a wide variety of biochemical reactions. Binding of ligands to iron modifies its redox potential, thereby permitting iron to transfer electrons with greater or lesser facility. The ability to transfer electrons, coupled with its abundance, as iron is the fourth most abundant mineral in the earth's cr...