Fig. 5
From: Nanoscale engineering of gold nanostars for enhanced photoacoustic imaging
Modeling of light absorption efficiency and PA responses of AuNS. (a) Representation of PA intensity phenomenon as considered by the analytical model. Plasmonic nanoparticles generate heat by absorbing the photons of the laser radiation, generating ultrasound signal. The laser beam intensity (W) decreases as it propagates through the length (L) of the sample. Adapted with permission of ref 55. Copyright American Chemical Society 2020. (b) Absorption cross-section (σa) per the nanoparticle volume (Vp) of AuNS HEPES, EPPS and MOPS. (c) PA intensity ratio between AuNS HEPES, EPPS and MOPS