A Facile and Scalable Process for Size-Controllable Separation of Nanodiamond Particles as Small as 4 nm

被引：61

作者：

Morita, Yoichi ^{[1
,2
]}

Takimoto, Tatsuya ^{[1
]}

Yamanaka, Hiroshi ^{[3
]}

Kumekawa, Katsumi ^{[3
]}

Morino, Shizuka ^{[3
]}

Aonuma, Shuji ^{[2
]}

Kimura, Takahide ^{[1
]}

Komatsu, Naoki ^{[1
]}

机构：

[1] Shiga Univ Med Sci, Dept Chem, Otsu, Shiga 5202192, Japan

[2] Osaka Electrocommun Univ, Dept Mat Sci, Osaka 5728530, Japan

[3] Tomei Diamond Co Ltd, Oyama 3230807, Japan

来源：

SMALL | 2008年 / 4卷 / 12期

关键词：

centrifugation; high-pressure high-temperature methods; nanodiamond; size control;

D O I：

10.1002/smll.200800944

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A study was conducted to demonstrate a facile and scalable method for separating powdered nanodiamond (ND), prepared by a static high-pressure high-temperature (HPHT) method. The method was also used to provide bulk quantities of ND particles. The study revealed some of the significant characteristics of the HPHT ND, such as high crystallinity, few impurities, and high compatibity of the surface chemical structure. The median size of the separated ND was also tuned from 4-25 nm, by controlling the conditions of the ultracentifugation. It was observed that the distribution of the smaller size of ND particle is narrow, ranging from 2-9 nm. It was also observed that the isolated ND in water were stable, without any precipitation and aggregation. These observations indicated that ND particles around 4 nm in size required 1 hour for bath sonication and 30 minutes for centrifugation, to obtain small ND particles.

引用

页码：2154 / 2157

页数：4

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