“…Furthermore, it should only require the use of small amounts of material so that even expensive, novel materials can be tested. Different aerosolization methods exist, such as the continuous drop method (Bach & Schmidt, 2008), the rotating drum method (Breum, 1999;Schneider & Jensen, 2008), the vortex shaker method (Morgeneyer, Le Bihan, Ustache, & Aguerre-Chariol, 2013), the magnetic stirrer setup (Stahlmecke et al, 2009) and the stirred fluidization system (Saleh et al, 2014). These systems can produce different particle number concentrations by controlling such experimental parameters as the feed rate, rotation speed, or shaking frequency.…”