这些优良特性主要来源于复合物中银纳米粒子的表面等离激元共振及其内部的电子跃迁。

These fine properties are mainly due to the surface plasmon resonance and inner electron transition of silver nanoparticles.

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铁、铬等致色离子存在不成对电子，单个电子吸收可见光，发生跃迁，使含有铁、铬离子的矿物产生颜色。

Iron ion and chromium ion with single electron can absorb the visible light and come into being color.

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