Enlarged Molecules from Excited Atoms in Nanochannels
Mathias Boström, Iver Brevik, Bo E. Sernelius, Maofeng Dou, Clas Persson, and Barry W. Ninham
The resonance interaction that takes place in planar nanochannels between pairs of excited state atoms is explored. We consider interactions in channels of silica, zinc oxide and gold. The nanosized channels induce a dramatically different interaction from that in free space. Illustrative calculations for two lithium and cesium atoms, demonstrate that there is a short range repulsion followed by long range attraction. The binding energy is strongest near the surfaces. The size of the enlarged molecule is biggest at the center of the cavity and increases with channel width. Since the interaction is generic, we predict that enlarged molecules are formed in porous structures, and that the molecule size depends on the size of the nanochannels.
Fig. Minus the full interaction energy between a pair of lithium atoms in a symmetrically excited final state between two gold surfaces distances d = 1nm and d = 2nm apart .
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Last updated: 07/16/12