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Presently, the only commercially available power generating thermoelectric (TE) modules are based on bismuth telluride (Bi2Te3) alloys and are limited to a hot side temperature of 250 °C due to the melting point of the solder interconnects and/or generally poor power generation performance above this point. For the purposes of demonstrating a TE generator(More)
Bi nanowires have been fabricated by electrochemical deposition into the pores of ion track etched polycarbonate membranes. Transmission electron microscopy and selected area electron diffraction measurements reveal that these Bi nanowires are single crystalline with the rhombohedral lattice structure of bulk Bi at ambient pressure. We have measured the(More)
The fabrication and structure characterization of ordered nanowire-nanotube hybrid arrays embedded in porous anodic aluminum oxide (AAO) membranes are reported. Arrays of TiO(2) nanotubes were first deposited into the pores of AAO membranes by a sol-gel technique. Co nanowires were then electrochemically deposited into the TiO(2) nanotubes to form the(More)
Coherent acoustic oscillations in Bi and Ag nanowire samples were studied with a femtosecond pump-probe technique and detection of the scattered light. The observed optical and acoustic properties reflect the nanostructure of these materials. The electronic and lattice contributions to the excitation of coherent acoustic phonons are described using a(More)
The correlation between the crystal structure and the magnetic properties of Co nanowires of diameter 65 and 200 nm fabricated by electroplating Co into the pores of anodic aluminum oxide membranes has been investigated. Strikingly different microstructures have been observed in these Co nanowires by means of x-ray diffraction and selected area electron(More)
Coherent phononic oscillations in Bi and Ag nanowires were studied with a femtosecond pump-probe technique. In Bi nanowires laser pulses of 50 fs excited simultaneously acoustic oscillations at a frequency of about 9.5 GHz and optical phonons in the THz range. The transmission of nanowires on a glass substrate and the light scattered from free standing(More)
Coherent acoustic and optical phonon oscillations in Bi nanowire samples were studied with a femtosecond pump-probe technique. Laser pulses of 50 fs excited simultaneously acoustic oscillations at a frequency of about 9.5 GHz and optical phonons in the terahertz range. The transmission signal of nanowires on a glass substrate and the signal of light(More)
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