Bestimmung kleiner Oberflächengrößen durch Krypton‐Adsorption

Abstract

Oligamide oxymethylieren, oxyathylieren und cyanathylieren. Die oben genannten Brornierungsprodukte der cyclischen Oligamide der E-Aminocapronsaure eignen sich z. B. zur Klarung der Halogenierung von Polyamiden.Die beschriebenen Arbeiten wurden von folgenden Institutionen gefordert :

N2 Adsorbate States on Fe Films between 77 K and 273 K

“…This is much more than the molecular-area values of nitrogen discussed in the literature (16. cm2 [22] to 10. cm2 [23]). Taking this into account it is reasonable to assume that the &state nitrogen is also directly bonded to the iron surface and is not physisorbed as a second layer on top of the y-phase as taken into consideration by Grunze [lo].…”

“…This observation may encourage experimental search for wetting phenomena in adsorbate systems which form a (3 x 1) phase, using, for instance, scanning tunneling microscopy [22] or other high-resolution methods. I wish to thank K. Binder, P. Rujan, I. Sega, and G. V. Uimin for fruitful cooperation on some of the results reported here.…”

Preparation and Surface Area Measurements of Platinized-Platinum Electrodes

“…Since physical adsorption of gases is well established as the "primary standard" of surface area measurement as given by Brunauer, Emmett, and Teller (6), this method as modified by the use of krypton for the adsorbate (7) krypton as the adsorbate for small total surface area samples are well known (7)(8)(9)(10)(11)(12), and the impracticality of attempting to determine nitrogen adsorption by pressure measurements when the total surface area is less than 1000 cm 2 is well established.…”

“…In the work described here an especially designed, small-volume McLeod gauge was used for pressure measurements and was found to give very satisfactory results. The advantages of using krypton as the adsorbate for small total surface area samples are well known (7)(8)(9)(10)(11)(12), and the impracticality of attempting to determine nitrogen adsorption by pressure measurements when the total surface area is less than 1000 cm 2 is well established.…”

Air Pollution

“…Very small surface areas, under 1 sq. meter per gram, have been determined by Haul (167) using krypton adsorption.…”