Gold_core–polyaniline_shell composite nanowires as a substrate for surface enhanced Raman scattering and catalyst for dye reduction

Abstract

The unique morphology of the nanocomposite is due to the confinement, typical diffusion path and the interaction between PANI and Au-nanoparticles.

Controlling the morphology of polyaniline–platinum nanocomposites using swollen liquid crystal templates

“…2, in Ref. [34]) at binding energies of 200.4, 284.9, 401.5 and 534.1 eV (for AN-Pt-D) and 199.1, 285.1, 400.1 and 532.8 eV (for ANÁHCl-Pt-D) correspond to Cl 2p, C 1s, N 1s and O 1s respectively and matched with the reported data [6,42]. Also binding energies of 171.3 and 231.8 eV for AN-Pt-D and 170.1 and 229.4 eV for ANÁHCl-Pt-D correspond to S 2p and S 2s.…”

“…One dimensional nanostructures of PANI was obtained when we allowed ammonium persulfate to slowly diffuse through the SLCs containing aniline/aniline hydrochloride [26,27]. Similarly, we obtained composite nanowires with gold core (Au core ) and PANI shell (PANI shell ) using SLCs as a soft, structure directing template [6]. The composite nanowires were prepared by simply pouring the SLC containing AuCl 3 over the SLC containing aniline.…”

“…The SLCs are versatile templates and were used to synthesize nanostructures of metals, polymers and nanocomposites [23][24][25]. We have recently developed a general method to prepare PANI nanostructures and its nanocomposites with noble metals using SLCs [6,[26][27]. We could control the morphology of PANI by controlled mixing of the oxidant with the aniline containing mesophases.…”

“…Numerous nanocomposites of PANI with metals, metalloids, nonmetals and carbon materials (carbon nanotube and graphene) were already reported in the literature due to their unique properties and different applications [5]. There has been a lot of interest in nanocomposites of PANI with metals such as Au, Pt, Pd, Ag and Cu due to their application in sensing and catalysis [6][7][8][9][10][11]. These nanocomposites of PANI with different metals are usually prepared by direct reaction of aniline with the metal salts such as gold chloride [12], palladium acetate [13], K 2 PtCl 6 [14] etc., Insitu oxidation of aniline leads to polymerization while the metal ions get reduced to the corresponding metal nanoparticles [14].…”

Recent progress on nanostructured conducting polymers and composites: synthesis, application and future aspects

“…This CP/metal nanocomposite showed an excellent electrocatalytic performance towards oxygen reduction reaction. Dutt et al [105] fabricated a PANI shell / Au core nanocomposite by pouring the mesophase containing gold chloride over the mesophase solution that contains aniline. The polymerization can be completed in 72 hours and the nanocomposite can be easily extracted from the mesophase.…”