The bismuth triiodide-assisted horizontal growth of CdS nanowires and CdO-CdS necklace-like nanowires.

Bismuth triiodide, a compound with a layered structure, is utilized to confine the growth of nanowires along the substrate surface in a low-temperature solution-phase reaction. The confinement is attributed to the electrostatic force between the bismuth triiodide sheet and the deposited Cd2+ cations that caused the CdS nanowires to grow within the surface of the bismuth triiodide sheet. As the nanowires grew longer, they began to form a high-yield woven network. Additionally, use of the same reaction system but with a minimized amount of sulfur led to the growth of CdO-CdS necklace-like nanowires. The optical and electric measurements suggest that the photoluminescence and electron field emission properties of these nanostructures are highly affected by their morphologies and chemical compositions.