Adsorption and electrical properties of nanodiamond powders in the presence of water vapor

被引：13

作者：

Denisov, S. A. ^{[1
]}

Sokolina, G. A. ^{[1
]}

Bogatyreva, G. P. ^{[2
]}

Grankina, T. Yu. ^{[1
]}

Krasil'nikova, O. K. ^{[1
]}

Plotnikova, E. V. ^{[1
]}

Spitsyn, B. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Frumkin Inst Phys Chem & Electrochem, Moscow 119991, Russia

[2] Natl Acad Sci Ukraine, Bakul Inst Superhard Mat, UA-04074 Kiev, Ukraine

来源：

PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES | 2013年 / 49卷 / 03期

关键词：

SURFACE;

D O I：

10.1134/S2070205113030088

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The adsorption of water vapor on nanodiamond (ND) powders of detonation synthesis with various chemical states of the particle surface is investigated. The specific surface, porosity, and isotherms of water-vapor adsorption by ND powders are determined. It is shown that ND surface chlorination leads to a decrease of concentration of the primary adsorption centers determining the amount of water adsorbed. The data on the influence of the water vapor relative pressure on electrical conductivity G and dielectric permeability E > of the powders before and after chemical modification of ND are obtained. The interconnection between the amount of adsorbed water and ND electrical parameters is considered within percolation theory. It is shown that water-vapor adsorption leads to a giant increase in the dielectric permeability value and significant rise of conductivity near percolation threshold.

引用

页码：286 / 291

页数：6

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