以有序碳纳米管阵列电极为基底电极,在硫酸或高氯酸溶液中,分别探明不同电化学聚合方法以及苯胺单体浓度对聚苯胺形貌的影响. 结果表明:采用循环伏安法无法制备出聚苯胺纳米线;而应用恒电位法虽可制得聚苯胺纳米线,但纳米线不能形成有序阵列;只有应用恒电流方法,并且以高浓度苯胺的高氯酸溶液作为聚合溶液,方能制得有序聚苯胺纳米线阵列.
The effects of electrochemical fabrication methods in different aniline concentrations on the morphologies of polyaniline, which was polymerized on the aligned-multi-walled carbon nanotubes electrode in H2SO4 or HClO4 electrolyte solution, were investigated. It was demonstrated that the polyaniline nanowires would not be prepared by cyclic voltammotry, whereas the nanowires could be obtained by the potentiostatic method without forming the ordered array. Only when the aniline concentration in HClO4 solution was high enough, the ordered polyaniline nanowires array could be fabricated by the constant current method.
[1] Hu L B, Gruner G, Li D, et al. Patternable transparent carbon nanotube films for electrochromic devices [J]. Journal of Applied Physics, 2007, 101(1): 016102.
[2] Tseng R J, Huang J X, Ouyang J Y, et al. Polyaniline nanofiber/gold nanoparticle nonvolatile memory [J]. Nano Letters, 2005, 5(6): 1077-1080.
[3] Liu F J, Huang L M, Wen T C, et al. Composite electrodes eonsisting of platinum particles and polyaniline nanowires as electrocatalysts for methanol oxidation [J]. Polymer Composites, 2007, 28(5): 650-656.
[4] Xu J J, Wang K, Zu S Z, et al. Hierarchical nanocomposites of polyaniline nanowire arrays on graphene oxide sheets with synergistic effect for energy storage [J]. ACS Nano, 2010, 4(9): 5019-5026.
[5] Varela H, Bruno R L, Torreesi R M. Ionic transport in conducting polymers nickel tetrasulfonated phthalocyanine modified electrodes [J]. Polymer, 2003, 44(18): 5369-5379.
[6] Wang J, Torardi C C, Duch M W. Polyaniline-related ion-barrier anticorrosion coatings: II. Protection behavior of polyaniline, cationic, and bipolar films [J]. Synthetic Metals, 2007, 157(21): 851-858.
[7] Forzani E S, Zhang H Q, Nagahara L A. et al. Conducting polymer nanojunction sensor for glucose detection [J]. Nano Letters, 2004, 4(9): 1785-1788.
[8] Zhao M, Wu X M, Cai C X. Polyaniline nanofibers: Synthesis, characterization, and application to direct electron transfer of glucose oxidase [J]. The Journal of Physical Chemistry C, 2009, 113(12): 4987-4996.
[9] Wang Z Y, Liu S N, Wu P, et al. Detection of glucose based on direct electron transfer reaction of glucose oxidase immobilized on highly ordered polyaniline nanotubes [J]. Analytical Chemistry, 2009, 81(4): 1638-1645.
[10] Liu J, Lin Y H, Liang L, et al. Templateless assembly of molecularly aligned conductive polymer nanowires: A new approach for oriented nanostructures [J]. Chemistry - A European Journal, 2003, 9(3): 604-611.
[11] Ma Y F, Zhang J M, Zhao G J, et al. Polyaniline nanowires on Si surfaces fabricated with DNA templates [J]. Journal of the American Chemical Society, 2004, 126(22): 7097-7101.
[12] Lee J I, Cho S H, Park S M, et al. Highly aligned ultrahigh density arrays of conducting polymer nanorods using block copolymer templates [J]. Nano Letters, 2008, 8(8): 2315-2320.