EPR signal of nanolayer in conducting polypyrrole (PPy) nanocomposites

被引：5

作者：

Kim, BH ^{[1
]}

Hong, SH

Kim, JW

Choi, HJ

Joo, J

机构：

[1] Korea Univ, Dept Phys, Seoul 136701, South Korea

[2] Korea Univ, Ctr Electro & Photo Respons Mol, Seoul 136701, South Korea

[3] Inha Univ, Dept Polymer Sci & Engn, Inchon 402751, South Korea

来源：

SYNTHETIC METALS | 2003年 / 135卷 / 1-3期

关键词：

polypyrrole; nanocomposite; EPR(ESR); relaxation time;

D O I：

10.1016/S0379-6779(02)00846-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We observed the very sharp EPR signals of the nanolayer of the intercalated PPy-DBSA in PPy-DBSA/Na+-MMT clay nanocomposite synthesized by inverse emulsion polymerization method. The g-value of EPR signal of the PPy-DBSA and the nanocomposite sample was 2.00432 (+/-0.00005) and 2.00263 (+/-0.00003), respectively. The line-widths (DeltaH(p-p)) of the broad peak and the sharp peak of the nanocomposite sample were 21.4 G and 0.44 G respectively at room temperature. The small DeltaH(p-p) of the nanolayer of the nanocomposite originates from the weak spin-orbit interaction. The spin-spin relaxation time of the sharp EPR signal was similar to1.3x10(-7) sec, which is longer than that (similar to5.5x10(-9) sec) of PPy-DBSA sample without clay. The density of states of the system was similar to0.085 states/ (eV ring) for the nanocomposite and similar to0.11 states /(eV ring) for the PPy-DBSA.

引用

页码：771 / 772

页数：2

共 5 条

[1] EPR study of chemically synthesized polypyrroles soluble in organic solvents [J].