摘要
本文采用离子注入掺杂技术，研究了全氧化态聚苯胺薄膜的离子束效应．‘４０ｋＶＫ＋离子束注入后，聚苯胺薄膜的电导率随着剂量的增加而迅速增加．当剂量为１×１０１７Ｋ＋／ｃｍ２时，电导率增加了８个数量级．ＦＴＩＲ光谱图显示了Ｋ＋离子注入使全氧化态聚苯胺中的醌亚胺结构发生还原反应．温差电流法测量表明，离子注入区呈现ｎ型半导体特性．四探针法测量了离子注入掺杂聚苯胺的电导率与温度的关系．本文还对离子注入掺杂全氧化态聚苯胺的导电机制进行了初步探讨．
ue to their stability, polyaniline (PAn) is considered to be one of the mostPOtential applicable conducting polymer. Ion beam effeCts on polyaniline films under the ion implantation with potassium ions (K+ ) have been investigated byStudying PAn in pernigraniline form through the FTIR and the temperature dependence of the dc conductivity. The pristine pernigraniline form PAn has conductivity as low as - 10-14S/cm2. The energy of K+ ions is 40 keV, while the dose rangedfrom 1 ×1015 to 1 × 1017 K+/cm2. Results showed that the conduCtivity of the PAfilms enhanced when doses increased. The conductivity at implanted region of thePAn films approaches 3.3 × 10-6S/cm when dose is about 1×1017 K+/cm2, and iseight magnitudes higher then that of the pristine. FTIR supra demonstrated thatthe pemigraniline PAn reveals reduchon under the K+ ion implantation, which isproposed to be the reason of conductivity. The meChanism of ion implantationand the relation of temperature dependence of conductivity suggested that the conductivity is due to the hopping in granular medals island.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1994年第1期48-54,共7页
Acta Polymerica Sinica
基金
国家自然科学基金
