Figure 3From: Optimization, Yield Studies and Morphology of WO3Nano-Wires Synthesized by Laser Pyrolysis in C2H2and O2Ambients—Validation of a New Growth MechanismScanning electron micrographs of WO3nano-rods grown under C2H2as a central carrier gas and oxygen as the secondary carrier gas. The spherical droplets from the precursor maintain their shape until their deposition into micro-particles. Inset (a) is a micro-particle before annealing showing the genesis of the growth of a nano-wire. After annealing there are numerous nano-wires growing from and in between the spheres. Dotted box (b) shows a region where a number of nano-wires are seen sprouting from spheresBack to article page