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银上镀金——这一古老技术,其形成机制至今仍像魔术一样令人惊奇。最近美国科学家仔细观察了金原子在银表面的沉积过程,这一过程揭示出一种从未发现过的罕见的金属薄膜形成方式。实验表明,金原子开始沉积时并不在银表面的最外层上形成覆盖层,而是在银的最外层之下形成一个“下面层”。只有在这个“下面层”基本完成之后,金薄膜才在银的最外层上面形成。美国商用机器公司的的S.蒋最近报道了这一意想不到
Gold on silver - an ancient technique whose formation is still as amazing as magic. Recently, scientists in the United States have carefully observed the deposition of gold atoms on the silver surface, revealing a rare form of metal film formation never seen before. Experiments have shown that gold atoms do not form a coating on the outermost layer of the silver surface when they begin to deposit, but form a “lower layer” below the outermost layer of silver. Only after this “underlying layer” has been substantially completed is the gold film formed on the outermost layer of silver. S. Chiang of U.S. Business Machines recently reported this unexpected