Fig. 5
From: Preparation of ZnO Nanoparticles with High Dispersibility Based on Oriented Attachment (OA) Process

TEM images of ZnO NPs with different morphologies obtained by changing reaction a time and b temperature as well as c NaOH content. a1–3, b1–3, and c1–3 correspond to samples 2–4, sample 10–12, and sample 15–17, respectively. See Fig. 1 for a reference of these conditions