The studied (PSiFe) nanoparticles had a core-shell structure; the iron oxide core had a diameter of around 15 nm, and the silica shell was around 25 nm thick. It was covered with PNIPAM layer approximately 5 nm thick. This resulted in a total nanoparticle diameter of about 60 to 70 nm. These nanoparticles assemble into thin films at the air-water interface, with the film morphology being highly responsive to temperature variations. As shown in our previous report, the compression isotherms reveal a switch between more compact and looser assemblies depending on temperature, forming either uniform or aggregated structures at the same surface pressure.