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Caption : fig. s1. diffusion coefficient of water as a function of electric field. the black dots represent diffusion coefficient of water in swnt, and the red dots represent that of bulk water out of swnt.

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Caption : (a) z(t) of h2o of ice nanotube for type a. 

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Caption : (b) z(t) of n2 inside the ice nanotube for type a.

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Caption : (c) z(t) of h2o of ice nanotube for type b.

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Caption : (d) z(t) of h2o of the center water chain for type b

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Caption : (e) z(t) of h2o of ice nanotube for type c1.

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Caption :  (f) z(t) of n2 inside the ice nanotube for type c1.

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Caption : fig. s3. 2d surface by unwrapping the ice nanotubes of type b.

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Caption : (a) average n2-n2, n2-swnt, n2-water interactions and the total interaction energy for nitrogen molecules inside swnt 

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Caption : (b) average water-water (lj and coulomb included), water-swnt, water-n2 interactions and the total interaction energy for water molecules inside swnt.