CNRS-Université de Lorraine, LCPME UMR 7564 , 405 Rue de Vandoeuvre, 54600 Villers-lès-Nancy, France.
Langmuir. 2017 May 2;33(17):4224-4234. doi: 10.1021/acs.langmuir.7b00892. Epub 2017 Apr 18.
The growth of vertically aligned and ordered polyaniline nanofilaments is controlled by potentiostatic polymerization through hexagonally packed and oriented mesoporous silica films. In such small pore template (2 nm in diameter), quasi-single PANI chains are likely to be produced. From chronoamperometric experiments and using films of various thicknesses (100-200 nm) it is possible to evidence the electropolymerization transients, wherein each stage of polymerization (induction period, growth, and overgrowth of polyaniline on mesoporous silica films) is clearly identified. The advantageous effect of mesostructured silica thin films as hard templates for the generation of isolated polyaniline nanofilaments is demonstrated from enhancement of the reversibility between the conductive and the nonconductive states of polyaniline and the higher electroactive surface areas displayed for all mesoporous silica/PANI composites. The possibility to control and tailor the growth of conducting polymer nanofilaments offers numerous opportunities for applications in various fields including energy, sensors and biosensors, photovoltaics, nanophotonics, or nanoelectronics.
通过在六方排列和取向的介孔硅膜中进行恒电位聚合，控制垂直排列和有序的聚苯胺纳米纤维的生长。在这种小孔模板（直径 2nm）中，可能会产生准单聚苯胺链。通过计时安培实验，并使用各种厚度的薄膜（100-200nm），可以证明聚合的瞬态，其中聚合的每个阶段（诱导期、生长和聚苯胺在介孔硅膜上的过度生长）都可以清楚地识别。介孔硅薄膜作为生成孤立聚苯胺纳米纤维的硬模板的优势效果，体现在增强了聚苯胺的导电和非导电状态之间的可逆性，以及所有介孔硅/聚苯胺复合材料显示出更高的有效电表面积。控制和调整导电聚合物纳米纤维的生长，为各种领域的应用提供了众多机会，包括能源、传感器和生物传感器、光伏、纳米光子学或纳米电子学。
