Hydrostatic contraction and anisotropic contraction effects on oxygen molecule nanorods

Using the nanosized porous medium SBA-15, we construct the condensed spin-1 network composed of oxygen molecules (O[Formula: see text]) with tube and rod structures. The condensed network can be controlled by changing the amount of O[Formula: see text] molecules and substituting nonmagnetic nitrogen molecules (N[Formula: see text]) at the O[Formula: see text] site. The characteristics of the two-dimensional spin model were observed in the monolayer and double layer physisorption systems. In a typical bulk system, the liquidizing temperature [Formula: see text] is 90 K, while in SBA-15 with a pore size of 8.5 nm, the monolayer network of O[Formula: see text] has a [Formula: see text] value of 60 K. However, in the monolayer system, when a half of O[Formula: see text] site is diluted with N[Formula: see text], [Formula: see text] increases to 94 K. Even after the N[Formula: see text] molecules are vaporized, they affect the physisorption potential of the inner wall of SBA-15. The resultant electric cloud of N[Formula: see text] hinders the evaporation of O[Formula: see text], resulting in an increase in [Formula: see text]. The effect is weakened with increasing number of physisorption layers. Thus, this study presents the unique condensation phenomenon of two molecules with different [Formula: see text] under a strong physisorption potential.

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Condensation phenomenon of oxygen and nitrogen molecules physisorbed into a porous medium

Mito

Orita

Deguchi

et al. 2023

Journal of Applied Physics

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Hydrostatic contraction and anisotropic contraction effects on oxygen molecule nanorods

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Condensation phenomenon of oxygen and nitrogen molecules physisorbed into a porous medium

Condensation phenomenon of oxygen and nitrogen molecules physisorbed into a porous medium

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