Wasatch Microfluidics 1 article published in JoVE Bioengineering The Submerged Printing of Cells onto a Modified Surface Using a Continuous Flow Microspotter Sherry N. Davidoff1, Adam R. Miles1, Valentin Romanov1,2, Bruce K. Gale1,2, Josh W. Eckman1, Benjamin D. Brooks1 1Wasatch Microfluidics, 2Department of Mechanical Engineering, University of Utah This 3D microfluidic printing technology prints arrays of cells onto submerged surfaces. We describe how arrays of cells are delivered microfluidically in 3D flow cells onto submerged surfaces. By printing onto submerged surfaces, cell microarrays were produced that allow for drug screening and cytotoxicity assessment in a multitude of areas.