You need block copolymers for that, something like Pluronic P-123. They should form the proper template for growing the wires and that only works with large block copolymers that already have that template shape. I am not sure if I could share my articles (copyrights, you know ;-)), so I looked for a free access journal, please check this link:
The best surfacant for growth ZnO nanowires are mentioned below.
You can also use, For 0D ZnO nanoparticles:
01. Anionic surfactant Sodium dodecyl sulfate, synonymously sodium lauryl sulfate, or sodium laurilsulfate, is a synthetic organic compound with the formula CH₃(CH₂)₁₁SO₄ Na (SDS), or
02. Nonionic Pluronic F-127, or
03. Nonionic surfactant Tergitol(R) NP-10 Nonylphenol Ethoxylate based surfactant.