Sulfur hexafluoride (SF6) has the potential to be a valuable transient racer for dating of young ground water. However, near urban areas, there are typically numerous point sources of SF6 which have a significant impact on the temporal evolution of its atmospheric mixing ratio, thereby complicating its use as an age-dating tool. Here, we present and discuss a 12-month record of atmospheric SF6 ...

Abstract Heterogeneous composites consisting of Bi 6 Cu 2 Se 3.6 Cl 0.4 O and are prepared according to the concept modulation doping. With prominently increased carrier mobility almost unchanged effective mass, electrical transport properties considerably optimized resulting in a peak power factor ≈1.8 µW cm −1 K −2 at 873 K, although concentration is slightly deteriorated. Meanwhile, lattice ...