Poster title: Dusty spirals triggered by shadows in protoplanetary disks Poster abstract: Spirals waves form in protoplanetary disks around young stars due to different physical mechanisms: planet torques, gravitational perturbations and illumination effects. Although recent near-infrared and sub-millimetric observations have revealed astonishing spiral-shaped features in discs, there is still an active discussion to understand how they formed. In this work, we focus on the spirals formed in the disc due to shadows cast at fixed disk locations. In particular, we study their effect on the dynamics of the dust particles, which eventually form planets. Our main finding is that dust particles of different sizes and densities are efficiently trapped inside these shadow-triggered spirals. We also emulate millimetric-wavelength observations and find that these dusty spirals are detectable with ALMA. Given that inside these structures the relative velocities among solids are lower, they constitute "sweet spots" for dust growth. This particular aspect is discussed in the context of planet formation.