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Thermodynamic analysis suggests that this chirality - dependent partition is determined by nanotube ' s intrinsic hydrophobicity and reveals two distinct regimes in hydrophobicity - chirality relation : a small diameter ( < 1 nm ) regime , where curvature effect makes larger diameter tubes more hydrophobic than small diameter ones , and a large diameter ( > 1 . 2 nm ) regime , where nanotube ' s polarizability renders semiconducting tubes more hydrophobic than metallic ones .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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