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Ag2Te and Pd doped Ag2Te nanowires are synthesized using chemical route. Field Emission Scanning Electron Microscopy (FESEM) shows the presence of nanowires of nearly few micron length and ~ 200 nm diameter. The composition analysis performed using Electron Dispersive Spectroscopy (EDS) shows the presence of almost 1.98 at% palladium. Reitveld refinement of X-ray diffraction (XRD) shows the presence of 0.3% of PdTe phase in addition to Ag2Te in Pd doped Ag2Te sample. [ABSTRACT FROM AUTHOR]

Hierarchical heterostructures consisting of W18O49 nanowires grown on CuO nanowires have been prepared and studied for their gas sensing properties. SEM images show that W18O49 initially grow as an shell over core CuO nanowire with protusion like branches whose thickness depends on oxygen partial pressure. These CuO:W18O49 structures were dielectrophoretically isolated and studied for their gas sensing properties. The results show potential of use of tailored hierarchical heterostructures for the fabrication of gas sensors. [ABSTRACT FROM AUTHOR]