Bi‐layered hybrid nanostructures of polythiophene (PTh) and metal nanotubes are fabricated by a sequential electrochemical synthetic method. Huge enhancement of photoluminescence of PTh single nanotubes coated with nanometer‐scale Cu, Ni, or Co metal is observed by using a laser confocal microscope, and can be explained by the effect of surface plasmon resonance. Bright light emission from a single strand of a PTh/Cu hybrid nanotube is observed (see figure).

Conducting poly (3,4-ethylenedioxythiophene) nanowires were synthesized by using an electrochemical polymerization method with a nanoporous template. Scanning and transmission electron microscopy confirmed the formation of conducting polymer nanowires (CPNWs) with an open end. The formation and the electrical properties of the CPNWs formed were dependent on synthetic conditions, such as the doping level, the polymerization time, and the applied current. The measured electrical conductivity of a single strand of CPNW was ∼3.4×10−3 S/cm at room temperature. From the ultraviolet and visible absorbance spectra, we observed a π–π* transition at ∼2.1 eV for the de-doped systems. A field emission cell of CPNW nanotips was fabricated. The turn-on field of the CPNWs was 3.5∼4 V/μm at 10 μA/cm2, and the current density increased up to 100 μA/cm2 at ∼4.5 V/μm. The field enhancement factor of CPNW nanotips was ∼1200, which is comparable to those of carbon nanotubes.

This letter is a report on hybrid double walled nanotubes (HDWNTs) of crystalline ferromagnetic nickel (Ni) nanotubes encapsulated conducting polypyrrole (PPy) nanotubes through a sequentially electrochemical synthetic method. Ferromagnetic Ni nanotubes were fabricated by an electrochemical deposition method outside the wall of the conducting PPy nanotubes. The formation and structure of HDWNTs of conducting PPy nanotubes and ferromagnetic Ni nanotubes were confirmed by transmission electron microscopy, high-resolution transmission electron microscopy, and elementary analysis. From the angular dependences of the magnetic hysteresis curves of the HDWNTs, the authors observed that the Ni nanotubes of the HDWNT systems had an anisotropic ferromagnetic nature with the maximum of coercivity and remanent-saturation magnetization when applying a magnetic field along the parallel direction of the tubes.

Polypyrrole (PPy) nanotubes and nanowires were synthesized through electrochemical polymerization method in nanoporous anodisc aluminum oxide (Al 2 O 3 ) template. The electrolyte consisted of pyrrole monomer, solvent, and ionic liquid dopant such as BMIMBF 4 (1-butyl-3-methyl imidazolium tetrafluoroborate) or BMIMPF 6 (1-butyl-3-methyl imidazolium hexafluorophosphate), which is stable in air and moisture. The length and diameter of PPy nanotubes and nanowires were determined by the synthetic conditions such as polymerization time, current, and dopant. The formation of nanotube and nanowire of PPy sample was confirmed by using field emission scanning electron microscope and transmission electron microscope. The UV=Vis and Raman spectra have been investigated for structural properties of the systems. We compare electrical properties of nano size PPy materials with bulky PPy ones prepared in the same chemical conditions.

We synthesized hybrid double wall nanotubes of conducting polymer nanotubes enveloped by magnetic nickel (Ni) nanotubes. Nanotubes of conducting polymers such as polypyrrole (PPy) and polythiophene (PT) were synthesized in the nanoporous of alumina template through electrochemical polymerization method. Magnetic Ni nanotubes were fabricated by electrochemical deposition outside the wall of the conducting polymer nanotubes. To discern the formation of the hybrid nano-systems, we performed SEM experiments. The structural properties of the hybrid double wall nanotubes were examined by using X-ray diffraction (XRD) experiments. The ferromagnetic nature of Ni nanotubes was confirmed through the magnetic coercivity by using superconducting quantum interference device (SQUID) experiments.