Abstract
Materials having low work function and anisotropic morphology will be a good candidate for display devices and cathode materials for microstructure analysis instruments. In the present work, we have investigated the synthesis of LaxNd1-xB6 (x = 0.1, 0.2, 0.3, 0.4 and 0.5) nanorods using ultrafine LaxNd1-x(OH)3 nanorods. For, the synthesis of LaxNd1-xB6, as-synthesised ultrafine nanorods of LaxNd1-x(OH)3 was subjected to borothermal treatment using NaBH4 in an inert atmosphere. The morphological study of LaxNd1-xB6 reveals the formation of nanorods (length ∼100–300 nm and width ∼25–30 nm). Further, to fabricate LaxNd1-xB6 film, as-obtained LaxNd1-xB6 nanorods were spin-coated on Si-substrate followed by slow drying in an inert atmosphere. The LaxNd1-xB6 film has been used for the field emission study. Interestingly out of various five compositions of LaxNd1-xB6 (x = 0.1, 0.2, 0.3, 0.4 and 0.5), the composition with x = 0.3 (La0.3Nd0.7B6) shows the lowest turn-on field (3.6 V/μm) as compared to reported lowest turn-on field (∼4.12 V/μm). The highest enhancement factor (β = 2459) has been observed for La0.3Nd0.7B6.
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