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Keywords:

  • photoacoustic effects;
  • photoacoustic imaging;
  • plasmonic nanoparticles;
  • silica shells;
  • gold nanoparticles
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Nanoparticle-augmented photoacoustics is an emerging technique for molecular imaging. This study investigates the fundamental process of the photoacoustic signal generation by plasmonic nanoparticles suspended in a weakly absorbing fluid. The photoacoustic signal of gold nanospheres with varying silica shell thicknesses is shown to be dominated by the heat transfer between the nanoparticles and the surrounding environment.