Pattern Growth and Field Emission Characteristics of Flower-Like RuO₂ Nanostructures

Abstract

A flower-like RuO2 nanostructure was selectively synthesized on a Si substrate by metal organic chemical vapor deposition (MOCVD). Bis(ethylcyclopentadienyl) ruthenium(II), Ru[(C2H5)C5H4]2, was shower sprayed onto the Si substrate with oxygen gas. Prior to the growth of the flower-like RuO2 nanostructure, patterns of Al and Fe films were deposited on the Si substrate by photolithography and electron beam (e-beam) evaporation deposition. The synthesized flower-like RuO2 nanostructures were examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX) analysis, X-ray diffraction (XRD), and micro-Raman spectroscopy. The results indicated that the flower-like nanostructures were RuO2 rutile structures with high crystallinity. For the particular synthesized morphology and design pattern, the current density and long-term stability characteristics of electron field-emission characteristics demonstrated that the flower-like RuO2 nanostructure has the potential to be used in a practical field-emission display.

Dielectric Barrier Discharge (DBD) Plasma Assisted Synthesis of Ag2O Nanomaterials and Ag2O/RuO2 Nanocomposites

“…For example, Lee et al [ 6 ] have documented that Ag 2 O/RuO 2 composite exhibits higher capacitance as compared to its individual performances. Ruthenium (IV) oxide (RuO 2 ) itself is an excellent candidate material for catalysis, field emission displays, fuel cells and supercapacitor applications [ 6 , 7 , 8 ]. There are varieties of methods such as wet chemical [ 9 ], biological [ 10 ], thermal deposition [ 11 ], thin film-based and recently plasma-mediated routes [ 12 , 13 , 14 , 15 , 16 , 17 ] to prepare nanomaterials are currently used.…”