منابع مشابه
Phosphorus retention capacity in red ferralitic soil.
In this study the main physical-chemical characteristics of red ferralitic soil to use as substrate in subsurface wetlands was determined. The P-removal was evaluated in a short-term isotherm batch experiment and in a column percolation experiment. The acid characteristic and high content of iron minerals in the red ferralitic soil facilitated the phosphorus removal. Also the sorption isotherms...
متن کاملPhotoluminescence and Esr Studies of Localized States in Amorphous Phosphorus
Photoluminescence and electron spin resonance measurements have been performed in bulk a-red P. We observe a photoluminescence band at 1.40 eV which exhibits a sensitivity to the excitation energy employed. Specifically, the peak of this band progresses to lower energies for higher energy excitation. Electron spin resonance measurements indicate -lo1? spins/cm3 for "cold dark" and optically ind...
متن کاملElectrical Activity of Boron and Phosphorus in Hydrogenated Amorphous Silicon
A. Pandey, B. Cai, N. Podraza, and D. A. Drabold Department of Physics and Astronomy, Condensed Matter and Surface Science Program, Ohio University, Athens, Ohio 45701, USA Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Missouri 63108, USA Department of Physics and Astronomy, University of Toledo, Toledo, Ohio 43606, USA Department of Physics and Astronom...
متن کاملOptical Absorption and Structural Order in Sputtered Amorphous Phosphorus
-Optical absorpt ion measurements a re repor ted f o r rf sput tered a-P f i l m s prepared under cond i t i ons o f v a r i a b l e subst rate temperature. Var ia t ions i n t h e o p t i c a l gap w i t h Ts are s i m i l a r t o changes i n t h e Raman s c a t t e r i n g and x-ray d i f f r a c t i o n spectra. The r e s u l t s suggest t h a t i n t e r mediate-range order p lays an import...
متن کاملAmorphous two-dimensional black phosphorus with exceptional photocarrier transport properties
Recently, two-dimensional materials have been extensively studied. Due to the reduced dielectric screening and confinement of electrons in two dimensions, these materials show dramatically different electronic and optical properties from their bulk counterparts. So far, studies on twodimensional materials have mainly focused on crystalline materials. Here we report studies of atomically thin am...
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ژورنال
عنوان ژورنال: Journal of the Ceramic Society of Japan
سال: 1989
ISSN: 0914-5400,1882-1022
DOI: 10.2109/jcersj.97.346