fig2

Figure 2. The fabrication method and microstructure characterization of LMNP inks. (A) Synthesize LMNPs by a probe sonication method. Reproduced with permission^[50]. Copyright 2016, John Wiley and Sons; (B) Photo and particle size distribution of LMNP inks. Reproduced with permission^[50]. Copyright 2016, John Wiley and Sons; (C) High Resolution Transmission Electron Microscope (HRTEM) and scanning transmission electron microscopy (STEM) images, along with elements mapping of LMNPs. Reproduced with permission^[50]. Copyright 2016, John Wiley and Sons; (D) Scanning electron microscope (SEM) image of the circuit patterned using LMNP inks^[49]. Scale bar is 20 m. Reproduced with permission. Copyright 2015, John Wiley and Sons; (E) Schematic illustration of EGaIn droplets encapsulated in oxide shell and with CNFs attached on the surface via interactions with Ga³⁺. Reproduced with permission^[57]. Copyright 2019, The Authors; (F) Evaporation-induced sintering films with mirror-like bottom surface and grey top surface. Reproduced with permission^[57]. Copyright 2019, The Authors. CNFs: Cellulose biological nanofibrils; EGaIn: eutectic Ga-In; Ga: gallium; LM: liquid metal; LMNP: LM nanoparticle.