A novel method for generating monodispersed droplet array by inkjet-patterned hydrophilic symbols for controlled reactions

This paper proposed a novel device for the generation of monodispersed droplet array on a superhydrophobic substrate modified by inkjet-printed hydrophilic symbols. Compared with previously reported droplet generation devices, the method proposed in this paper is capable of pre-depositing reagents at the site of each droplet, and is able to trigger specific reactions such as recombinase polymerase amplification (RPA), leading to a simpler solution to controlled reactions. Meanwhile, this device no longer requires complicated droplet-generating structures and cumbersome peripheral devices, which makes it a perfect candidate for point-of-care testing (POCT)