@article{120791, author = {C.H. Chen and D. A. Saville and I.A. Aksay}, title = {Electrohydrodynamic "drop-and-place" particle deployment}, abstract = { The "drop-and-place" paradigm aims at delivering and positioning liquid drops using a pulsed electrohydrodynamic jet. On-demand drops much smaller than the diameter of the delivery nozzle may also contain particles. We report proof-of-concept experiments on the delivery of single 2 mu m diameter particles using a 50 mu m nozzle and identify the control parameters for dosing and positioning accuracies. A positioning accuracy at the micrometer level is achieved by eliminating contact line pinning on a hydrophobic surface and minimizing impingement-induced motion. The dosing statistics follow the random Poisson distribution, indicating that single-particle accuracy can be achieved using a gating mechanism. (c) 2006 American Institute of Physics. }, year = {2006}, journal = {Applied Physics Letters}, volume = {88}, month = {04/2006}, isbn = {0003-6951}, language = {eng}, }