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Originally posted by 8814402 at 2011-02-18 09:02:17:
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Our research on the melting of a substrate-supported Au nanoparticle, irrespective of the sort of substrate, reveal that the melting point suppression of a substrate-supported Au nanoparticle is strongly ruled by the contact angle between the particle and the substrate. When the contact angle is less than 90, a much stronger size-dependent melting point depression compared with those for free nanoparticles is predicted; when the contact angle is great than 90, the melting temperature of the supported Au nanoparticles are somewhat higher than those for free particle, and the degree of discrepancy depends on the particle¨Csubstrate interaction, which was not found in previous research.
4Â¥2011-02-18 21:03:07
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²Î¿¼¾ä£ºIf the angle ¦È is less than 90 degrees the liquid is said to wet the solid. If it is greater than 90 degrees it is said to be non-wetting.

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Less strongly hydrophilic solids will have a contact angle up to 90¡ã.
If the solid surface is hydrophobic, the contact angle will be larger than 90¡ã.
An apparent contact angle becomes smaller when a true contact angle is smaller than 90¡ã.
2Â¥2011-02-18 17:00:39
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8569636.hi(½ð±Ò+5, ·­ÒëEPI+1): лл£¡ 2011-02-19 07:38:33
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