Preparation and behavior of brownish, clear nanodiamond colloids
Preparation and behavior of brownish, clear nanodiamond colloids
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DOI：
10.1002/adma.200601452
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发表时间：
2007-05-07
影响因子：
29.4
通讯作者：
Osawa, Eiji
中科院分区：
文献类型：
--
作者：
Ozawa, Masaki;Inaguma, Masayasu;Osawa, Eiji
一种采用高功率超声处理的简便新方法可与搅拌介质研磨一样有效地破碎、分解牢固凝聚的纳米金刚石并获得分散体。展示了去凝集纳米金刚石在各种非水溶剂中的分散特性，以及水溶胶的 pH 依赖性分散/沉淀行为（见图）。胶体的棕色主要归因于叠加在可见波长的有限吸收上的瑞利散射。
A new facile method that employs high-power sonication is used to break, up firmly agglutinated nanodiamonds and obtain dispersion just as effectively as stirred-media milling. ne dispersion properties of the de-agglutinated nanodiamonds in various nonaqueous solvents, and the pH-dependent dispersion/precipitation behavior of the hydrosols are presented (see figure). The brownish color of the colloids is attributed mostly to the Rayleigh scattering superimposed over the finite absorption in the visible wavelength.