Laslau Cosmin, Zujovic Zoran D, Travas-Sejdic Jadranka
Department of Chemistry, Polymer Electronics Research Centre, University of Auckland, Private Bag 92019, Auckland, New Zealand.
Macromol Rapid Commun. 2009 Oct 1;30(19):1663-8. doi: 10.1002/marc.200900244. Epub 2009 Jul 8.
The identification and control of a critical stage of polyaniline "nanotube" self-assembly is presented, namely the granular agglomeration or growth onto nanorod templates. When the synthesis pH is held above 2.5, smooth insulating nanorods exhibiting hydrogen bonding and containing phenazine structures are produced, while below pH 2.5, small 15-30 nm granular polyaniline nanoparticles appear to agglomerate onto the available nanorod surface, apparently improving conductivity of the resulting structures by three orders of magnitude. This finding affects both fundamental theories of polyaniline nanostructure self-assembly and their practical applications.
本文介绍了聚苯胺“纳米管”自组装关键阶段的识别与控制，即颗粒团聚或在纳米棒模板上生长。当合成pH值保持在2.5以上时，会生成呈现氢键且含有吩嗪结构的光滑绝缘纳米棒；而在pH值低于2.5时，15 - 30纳米的小颗粒聚苯胺纳米粒子似乎会团聚在可用的纳米棒表面，这显然使所得结构的电导率提高了三个数量级。这一发现既影响聚苯胺纳米结构自组装的基础理论，也影响其实际应用。
