通过修正的Mie理论分别对单金属Ag、单金属Cu和Cu核Ag壳纳米颗粒/玻璃复合材料的吸收光谱进行了理论计算.计算结果表明,对单金属Ag纳米颗粒/玻璃复合材料,Ag的吸收峰位于425nm左右,不随颗粒尺寸变化而发生偏移;对单金属Cu纳米颗粒/玻璃复合材料,Cu的吸收峰也不随尺寸变化发生偏移但强度较弱;对Cu核Ag壳纳米颗粒/玻璃复合材料,随着Ag壳厚度的增加,Ag的吸收峰有明显的红移现象,而Cu的吸收峰位不变.此外,采用离子交换法制备了双金属Ag-Cu纳米颗粒/玻璃复合材料,实验结果表明,在后续热处理条件相同的情况下,延长Ag离子交换时间,Ag纳米颗粒尺寸增大,吸收峰红移,与理论计算结果很好的吻合.
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