Coasne B, Grosman A, Ortega C, Simon M
Groupe de Physique des Solides, Universités Paris 6 et 7, UMR-CNRS 75-88, 2 place Jussieu, 75251 Paris Cedex 05, France.
Phys Rev Lett. 2002 Jun 24;88(25 Pt 1):256102. doi: 10.1103/PhysRevLett.88.256102. Epub 2002 Jun 6.
We report on an experimental study of adsorption isotherm of nitrogen onto porous silicon with noninterconnected pores open at one or at both ends in order to check for the first time the old (1938) but always current idea based on Cohan's description which suggests that the adsorption of gas should occur reversibly in the first case and irreversibly in the second one. Hysteresis loops, the shape of which is usually associated with interconnections in porous media, are observed whether the pores are open at one or at both ends, in contradiction with Cohan's model.
我们报道了一项关于氮气在具有一端或两端开口的非连通孔隙的多孔硅上吸附等温线的实验研究，目的是首次检验基于科汉描述的古老（1938年）但至今仍流行的观点，该观点认为在第一种情况下气体吸附应可逆发生，而在第二种情况下不可逆发生。无论孔隙是一端开口还是两端开口，都观察到了滞后回线，其形状通常与多孔介质中的连通性有关，这与科汉模型相矛盾。
