Decorating Polypyrrole Nanotubes with Au Nanoparticles by an In Situ Reduction Process

Abstract

Au nanoparticle-decorated polypyrrole nanotubes (defined as PPy/Au nanocomposites) are prepared by an in situ reduction process. Polypyrrole (PPy) nanotubes are prepared by a self-degraded template method, and Au nanoparticles are deposited in situ by the reduction of HAuCl(4) . The size and uniformity of the Au nanoparticles that decorate the PPy nanotubes can be controlled by adjusting the experimental conditions, such as the stabilizers used and the reaction temperature. The morphologies and optical properties of the nanocomposites have been characterized by scanning electron microscopy, transmission electron microscopy, UV-vis, and FT-IR spectroscopy. Conductivity measurements show that the conductivities of the nanocomposites decrease with a decrease of temperature, and the conductivity-temperature relationship obeys the quasi-one dimensional variable range hopping model.

Controlled spontaneous generation of gold nanoparticles assisted by dual reducing and capping agents

“…Several other aniline derivatives were also tested and oxidative polymerization was also reported with o-anisidine [163] and o-aminophenol [164]. To circumvent the need of an external reducing agent, polymers were also used for the decoration of various nanostructures such as single-walled carbon nanotubes (SWNTs) [165], polypyrrole nanotubes [166], and PEGylated nanogels [167]. Sufficient solubility was achieved upon covalent functionalization of SWNTs with polyethyleneimine and functionalized SWNTs could reduce HAuCl 4 in water.…”

Microwave absorption studies of polyaniline nanocomposites encapsulating gold nanoparticles on the surface of reduced graphene oxide in the presence of 2-naphthalene sulfonic acid

“…Micelles composed by NSA can serve as softtemplates due to the presence of -SHO 3 groups in the structure of the surfactant. Polymerization takes place at the water/micelle interface due to hydrophilic APS, and the growth of the nanotubes or nanofibers is controlled by a polymerization and elongation process [43]. Figure 3 shows the FTIR spectra of (a) GRG and NSA-GRG complex, (b) PANS, PANS/GRG-3, and PANS/GRG-6.…”

Electromagnetic synergetic actuators based on polypyrrole/Fe3O4 hybrid nanotube arrays

“…Nanohybrid materials are made up of different components interacting at the nanoscale, and can have new or improved properties that cannot be achieved by the individual components or their bulk mixtures [24]. For example, the combination of conducting polymers with a variety of nanosized inorganic species such as metals [25,26], metal oxides [27], or colloidal semiconducting particles [28,29] can lead to a variety of hybrid functional materials which offer advantages in catalysis, optoelectronics, and energy storage devices. The hybrid approach should also be capable of being employed to fabricate synergetic actuators.…”