Conductivity Mechanisms in a Composite of Chitosan-Silver Nanoparticles

被引：15
作者：
Prokhorov, E. [1 ]
Luna-Barcenas, J. G. [1 ]
Gonzalez-Campos, J. B. [2 ]
Sanchez, I. C. [3 ]
机构：
[1] Cinvestav Unidad Queretaro, Queretaro 76230, Qro, Mexico
[2] Univ Michoacana, Morelia, Michoacan, Mexico
[3] Univ Texas Austin, Dept Chem Engn, Austin, TX 78712 USA
来源：
MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2011年 / 536卷
关键词：
Bionanocomposites; chitosan; conductivity; silver nanoparticles; PERCOLATION; RELAXATION; FILMS;
D O I：
10.1080/15421406.2011.538327
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The aim of this work was to investigate the conductivity mechanisms of a bionanocomposite of chitosan-silver nanoparticles. The DC conductivity in dry samples shows that the composite exhibits a percolation threshold at about 2% volume fraction of nanoparticles. For films with less than 2%, the temperature dependence of the DC conductivity in the range 2-70 degrees C exhibits the two-dimensional hopping conductivity. For all nanocomposites in the temperature range 70-180 degrees C, both conductivity and relaxation times obtained from electrical module measurements demonstrate an Arrhenius-type temperature dependence. This behavior is associated with the migration property of movable hydrogen ions and the formation of dipolar structures.
引用
收藏
页码：24 / 32
页数：9
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