A series of calculations on MgB2 and related isoelectronic systems indicates that the layer of Mg2+ ions lowers the nonbonding B pi ( p(z)) bands relative to the bonding sigma ( sp(x)p(y)) bands compared to graphite, causing sigma-->pi charge transfer and sigma band doping of 0.13 holes/cell. Because of their two dimensionality the sigma bands contribute strongly to the Fermi level density of s...

Structural and magnetic properties of a series of low doped Zn 1−x Co x O thin films deposited from Zn and Co metal targets on (0001) Al 2 O 3 substrates. Abstract We report on the synthesis of low doping Zn 1−x Co x O (0 < x < 0.1) thin films on (0001)-Al 2 O 3 substrates. The films were prepared in an oxidizing atmosphere, using the pulsed laser deposition technique starting from Zn and Co me...

OKAY, A BIT DRAMATIC, but all of a sudden the Journal of Applied Physiology has been dragged into the world of performance enhancement in professional cycling. Although published in 2005, Ed Coyle’s paper (1) on the physiology of a famous cyclist is back in the spotlight given that cyclist’s recent public admission of many years of doping, possibly during the time of Ed’s study. Were the data i...

LaTaON2 is an attractive visible-light-active photocatalyst for water splitting due to its broad visible light absorption as far 650 nm and proper band edge positions. Notwithstanding these promising properties, generally exhibits poor photocatalytic activity because of high defect concentration that severely hinders charge separation. Here, has been modified by doping Al into the Ta sublattice...

Metal oxide semiconductor nanocrystals (NCs) exhibit localized surface plasmon resonances (LSPRs) tunable within the infrared (IR) region of the electromagnetic spectrum by vacancy or impurity doping. Although a variety of these NCs have been produced using colloidal synthesis methods, incorporation and activation of dopants in the liquid phase has often been challenging. Herein, using Al-doped...

ZnO is a promising material suitable for variety of novel electronic applications including sensors, transistors, and solar cells. Intrinsic ZnO film has inferiority in terms of electronic properties, which has prompted researches and investigations on doped ZnO films in order to improve its electronic properties. In this work, aluminum (Al) doped ZnO (AZO) with various concentrations and undop...

Molybdenum silicides are attractive high-temperature structural materials because of their excellent thermal stability and outstanding oxidation resistance at high temperatures. First-principles calculations were employed to investigate the effect alloying elements (Cr, Nb, V, W, Al, Ga, Ge) on mechanical properties Mo3Si. The stabilities doped Mo3Si calculated, showing that Pm-3n structure was...

We have read with interest the recent letter of SanchisGomar et al. (2010), and we basically agree with the authors who concluded that normobaric hypoxia can significantly modify several hematological parameters tested by anti-doping authorities so that anti-doping organizations should take into account the possibility of including normobaric hypoxia among the doping practices at least as a mas...