Correlation between viscosity and absorption of electromagnetic waves in an aqueous UNCD suspension

被引：22

作者：

Vul, A. Ya. ^{[1
]}

Eydelman, E. D. ^{[1
,2
]}

Inakuma, M. ^{[3
]}

Osawa, E. ^{[3
]}

机构：

[1] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[2] Chem Pharmaceut Acad, St Petersburg 197376, Russia

[3] Shinshu Univ, Fac Text Sci & Technol, AREC, NanoCarbon Res Inst, Nagano 3868567, Japan

来源：

关键词：

nanodiamond; ultrananocrystalline diamond; suspension; diamond cluster; viscosity; percolation conductivity; plasmon; plasmon resonance absorption; sp(3)-sp(2) phase transition in nanocarbon;

D O I：

10.1016/j.diamond.2007.08.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model of ultrananocrystalline diamond (UNCD) particle in an aqueous suspension produced by a stirred-media milling process of detonation nanodiamonds has been suggested for the first time. This model is based on a hypothesis that surface of the single UNCD particle contains partly disconnected sp(2) hybridized carbon regions. These regions are formed due to the sp(3)-sp(2) phase transition on a surface of UNCD particle as result of local heating of that surface during the stirred-media milling process. Unusual high viscosity, UV-Vis absorption, black color in visible region of the UNCD suspension and difficulty of plasmon resonance absorption observation have been explained in the suggested model. The percolation between the sp(2) regions has explained small conductivity of UNCD powder and suggests a dependence of the conductivity on conditions of the milling process. Our model fits well with recent characterization of UNCD powder by NMR and computer simulation. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：2023 / 2028

页数：6

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