Flammable Hydrogen Research Articles

A novel deposition method for thin‐film electroluminescent devices

Abstract— Thin ZnS:Mn and SrS:Ce electroluminescent films are grown by solid‐source metal‐organic chemical vapor deposition (MOCVD). The method is attractive because it uses relatively non‐toxic materials and does not require flammable hydrogen or toxic H2S. Performance results are presented for both blue‐ and white‐emitting phosphors. Even though the method has not yet been optimized, luminous efficacy of 3 lm/W at low drive voltages has been attained for ZnS: Mn.

Faust 2069: Feuerluft was the Common Term for Oxygen

According to all commentary which I have been able to find for these lines, we would here be expected to visualize a balloon ascent similar to those performed by Henry Cavendish or by the Montgolfier brothers in the early 1780's, and should understand Feuerluft to mean Cavendish's flammable hydrogen, or simply the hot used by the Montgolfiers. General preference for the latter seems to derive from Goethe's use of the word for the products of Friedrich Schlegel's laboratory (JA, xiII, 300) in 1801-a dozen or more years, to be sure, after Goethe wrote the lines quoted above. So long as we feel bound to accept a balloon-like ascent and exit of Faust and Mephisto at the end of the second Studierzimmer scene, it is of no importance whether Feuerluft be taken as hydrogen or hot air. It does appear, however, that these particular interpretations of Feuerluft constitute our principal reason for assuming such an exit. It is my argument here that Faust and Mephisto are to be visualized after line 2072 not rising gently from the scene as if drawn upward by a balloon, but rather shooting away in a spewing rush of flame reminiscent of the old Faust Book. Line 2069 refers, I think, to the highly combustible air which-isolated shortly before these lines were written and still in 1790 the center of intense interest-