Figure 2

TEM/SEM images of some nanoparticles from “drying” samples of nanofluids synthesized by the chemical solution method [16, 28–32] (a CePO₄ nanofibers; b octahedral Cu₂O nanoparticles; c N-vinylcaprolactam polymer-nanoparticles; d spherical Fe₃O₄ nanoparticles; e elliptic Cu nanorods; f needle-like CuO nanoparticles; g hollow CuS nanoparticles; h hollow and wrinkled Cu₂O nanoparticles; i Cu₂O(core)/CuS(shell) nanoparticles)