Probing the Thermal Behavior and Stability of Metal-Fe₃O₄ Heterodimer Nanoparticles Utilizing In Situ Pulsed Laser Heating TEM

Figure 2

TEM micrographs displaying the heterodimer wetting behavior on a carbon support membrane (a, h) bright field- (BF-) TEM images of Pt and Au heterodimers, respectively, before laser irradiation. (b–e, i–l) Frames taken from the in situ laser heating TEM movie which illustrates the wetting process of the Pt and Au, respectively, onto the Fe₃O₄. (f, g, m, n) HAADF-STEM images of Pt and Au heterodimers, respectively, after laser irradiation.