Ice crystals are an important component of the climate system. They can form homogeneously from supercooled solutions or heterogeneously if an Ice Nucleus (IN) is present to lower the activation barrier. Ice formation affect precipitation patterns and the global energy budget of the atmospere1. It is well established that bacteria2 as well as long-chain alcohol coatings3 can act as efficient ice nuclei. Currently, there is an increasing interest in particles from the ocean and their role in atmospheric ice nucleation4. However, despite the obvious importance of ice crystal formation for the global weather system the mechanisms behind are not fully understood1. This work investigates model systems containing sea salt, bacteria and alcohol.