fig1

Figure 1. Mechanism of laser-triggered remote decomposition of DPI-HFP/Fe₃O₄ NPs/Ecoflex 00-30 composites. (A) A schematic illustrating the degradation mechanism of DPI-HFP/Fe₃O₄ NPs/silicone composites under femtosecond pulsed laser irradiation. The DPI-HFP/Fe₃O₄ NPs/silicone composites (left) produce fluoride ions via the photothermal effect of Fe₃O₄ NPs (middle), leading to their decomposition into liquid residue and Fe₃O₄ NPs (right). (B) Serial images showing the DPI-HFP (10 wt.%)/Fe₃O₄ NPs (1.00 wt.%)/Ecoflex 00-30 composite before (left), during (middle), and after (right) 800 nm laser irradiation (spot size = 8 mm (diameter), pulse width = ~ 100 fs, power = 0.25 W) for 15 min, without prior UV or heat treatment. NP: Nanoparticle; DPI-HFP: diphenyliodonium hexafluorophosphate; UV: ultraviolet.