Photoluminescence Properties Of Nanowires Research Articles

Optical and gas sensing properties of SnO2 nanowires grown by vapor–liquid–solid mechanism

SnO2 nanowires were synthesized via vapor transport method by modulating the thickness of the Gold (Au) catalyst. The effect of morphology and photoluminescence properties of nanowires on gas sensing was investigated. The structural and morphological studies reveal that the synthesized nanowires are crystalline in nature with high density. The nanowires were evenly spread on the surface of the substrate. These nanowires were tested for gas sensing properties based on change in resistance under exposure to air and gases (CO, CH4, Methanol). The results showed an improved response as compared to the previous studied. These sensors have potential applications in advanced sensing devices.

Comparative Study of Photoluminescence in Silicon and Zinc Oxide Nanowires

The comparative study of indirect and direct gap (Si and ZnO, respectively) semiconductor nanowires (NWs) is reported. The NWs were grown on silicon substrates by gold-assisted self-assembly technique. SEM study demonstrated high-density of nanowires. HRTEM studies show that both types of NWs (Si and ZnO) are the naturally-grown heterostructures consisting of crystalline core and envelope. The variation of photoluminescence properties of NWs with cross section and/or the material of the samples is analyzed.