Thermal transition behaviour of iron oxide-polypyrrole nanocomposites

被引：14

作者：

Suri, K

Annapoorni, S ^{[1
]}

Tandon, RP

Rath, C

Aggrawal, VK

机构：

[1] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India

[2] Univ Allahabad, Dept Phys, Allahabad 211002, Uttar Pradesh, India

来源：

CURRENT APPLIED PHYSICS | 2003年 / 3卷 / 2-3期

关键词：

D O I：

10.1016/S1567-1739(02)00203-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Distinct thermal transitions have been observed in nanocomposites based on iron oxide-polypyrrole prepared by simultaneous gelation and polymerization process. The transition behaviour for various iron oxide-polypyrrole compositions was investigated with the help of differential scanning calorimetery. It has been observed that the samples show a magnetic to nonmagnetic transition at 410 degreesC. The presence of exothermic peak at 410 degreesC is a strong indication of magnetic transition corresponding to gamma-Fe2O3 phase of iron oxide to a nonmagnetic alpha-Fe2O3 phase in these nanocomposites. However such a transition was not observed in nanocomposites containing lesser concentration of conducting polymer. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：209 / 213

页数：5

共 19 条

[1]

AGGARWALA P, 1997, PHYS LETT A, V231, P434

[2]

BATE RT, 1988, SCI AM, V258, P196

[3]

Hadjipanayis G.C., 1991, SCI TECHNOLOGY NANOS

[4] COATING OF UNIFORM INORGANIC PARTICLES WITH POLYMERS .3. POLYPYRROLE ON DIFFERENT METAL-OXIDES [J].