  We present theoretical calculations to interpret optical and mechanical
properties of Ag@Fe3O4 nanoflowers. The microstructures and nature of optical
peaks of nanoflowers are determined by means of the Mie theory associated with
effective dielectric approximation and the experimental absorption spectrum.
Under laser illumination, the thermal strain fields inside and outside the
structure due to the absorbed optical energy are studied using continuum
mechanics approach. Our findings provide simple but comprehensive description
of the elastic behaviors of previous experiments.
