Electrohydrodynamic "drop-and-place" particle deployment

C. H. Chen, D. A. Saville, Ilhan A. Aksay

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


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 μm diameter particles using a 50 μm 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.

Original languageEnglish (US)
Article number154104
JournalApplied Physics Letters
Issue number15
StatePublished - Apr 10 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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