文献类型：期刊文献

英文题名：Layer-by-layer assembly of aqueous dispersible, highly conductive poly(aniline-co-o-anisidine)/poly(sodium 4-styrenesulfonate)/MWNTs core-shell nanocomposites

作者：Wang, Fei[1];Wang, Gengchao[1];Yang, Shu[2];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

年份：2008

卷号：24

期号：11

起止页码：5825

外文期刊名：LANGMUIR

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000256232900029)】；

语种：英文

摘要：Poly(aniline-co-o-anisidine) (P(An-co-o-As)) ionomers and poly(sodium 4-styrenesulfonate) (PSS) were layer-by-layer (LbL) assembled on carboxylic acid-functionalized multiwalled carbon nanotubes (MWNTs). The multilayered polyelectrolyte greatly enhanced the dispersibility and stability of MWNTs in aqueous solutions. More importantly, the nanocomposites showed 3 orders of magnitude of conductivity increase, 4.2 S/cm, compared to that of neat ionomers, 0.004 S/cm. The deposition procedure was monitored with zeta (zeta) potential changes. Fourier transform infrared (FT-IR), ultraviolet-visible (UV-vis), and Raman spectra confirmed charge transfer from the quinoid units of the P(An-co-o-As) to MWNTs, which effectively delocalize the electrons. Further, we explored the pH response of the assembled P(An-co-o-As)/PSS/MWNTs multilayer nanocomposites. The sharp transition of the conductivity in the pH range of 2 to 6 makes the nanocomposites promising candidates for chemical-biological sensing.