LIMITATION OF ELECTRON MEAN FREE PATH IN SMALL SILVER PARTICLES
LIMITATION OF ELECTRON MEAN FREE PATH IN SMALL SILVER PARTICLES
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DOI：
10.1007/bf01393059
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发表时间：
1969-01-01
影响因子：
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通讯作者：
VONFRAGS.C
中科院分区：
文献类型：
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作者：
KREIBIG, U;VONFRAGS.C
利用Mie理论对悬浮在感光玻璃中的球形银颗粒(直径在24~210A之间)的吸收测量结果进行了评估，发现在吸收峰波长(λ=0.405μ)处的吸收系数保持不变，而折射率随着颗粒尺寸的减小而增加约5倍。在测量精度和不同作者的体光学常数的差异范围内，这种偏离体积值的情况可以用“自由程效应”来描述，“自由程效应”是传导电子与粒子表面碰撞的影响。结果与Kawaba和Kubo的量子力学理论进行了比较。
By evaluating, with help of Mie's theory, absorption measurements of spherical silver particles — (between 24 and 210 Å in diameter) — suspended as colloid in photosensitive glasses we found that the absorption coefficient at the wavelength of absorption peak (λ=0.405 μ) remains constant, whereas the refractive index increases by about a factor of 5 when the particle size decreases. Within accuracy of measurements and the differences of bulk optical constants of various authors this deviation from the bulk values can be described by the “free path effect”, the influence of conduction electron collisions with particle surfaces. The results are compared with the quantum mechanical theory ofKawabataandKubo.