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In summary, we presented plasmonic high-efficiency Au-CdTe nanocomposite films in a three-dimensional construction of repeating layers. These composites integrate Au nanoparticles at a fixed optimal dielectric spacing and plasmon-couple them with CdTe nanocrystal emitters for significantly enhanced emission. In the Au-CdTe nanocomposite film, we showed that the emission of CdTe NCs is increased by...
We observed second harmonic generation from semiconducting CdTe/CdS nanocrystals with a diameter below 15 nm. Their submicron size, high nonlinearity and orientation sensitive SHG response are adapted for ultrafast, high resolution probing of optical near-fields.
The combination of the surface photovoltaic and the photoacoustic techniques was used for probing the surface electron-phonon interaction (SEPI) and the mechanism of nonradiative transitions of the three typical nanocrystalline semiconductors at room temperature upon illumination of UV. near IR light. The results showed that the SEPIs on the La-doped nano-TiO2 and the nano-La1-xSrxFeO3 had nothing...
Hydroxyapatite (hydroxyfluorapatite) - collagen and composite materials are synthesized using directed diffusion of ions from solutions on collagen fibers. Computer tomography indicates that the salt component is rather uniformly distributed over the organic matrix. According to the electron microscopic data,the composite materials involve salt nanocrystals (less than 1m in size), which are uniformly...
Improvement of dye sensitized solar cell was investigated using methyl-violet dye and nanocrystalline ZnO thin film electrodes. A low cost fabrication method and low cost materials were used to prepare this photocell. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the microstructure and surface properties of dye coated ZnO electrodes. According to the...
Bulk nanostructured (Bi,Sb)2Te3 compounds and GeTe based amorphous/nanocrystal composites have been successfully fabricated by the combined hydrothermal/hot-pressing and quenching/annealing methods, respectively. The (Bi,Sb)2Te3 nanopowders synthesized by hydrothermal method exhibit a hollow-like structure. After hot-pressing, the nanoscale grains varying from tens to hundreds of nanometers were found...
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