Optical manipulation of neutral nanoparticles suspended in a microfluidic channel

Philippe Ben-Abdallah, Ahmed Ould El Moctar, Bo Ni, Nadine Aubry, Pushpendra Singh

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


An optical method to deterministically manipulate nanosized particles in suspensions within confined microfluidic devices is introduced. We show that under appropriate conditions strong dielectrophoretic forces several orders of magnitude larger than the Brownian force can be generated using an external optical actuation. A self-consistent coupled point-dipole model that includes the redistribution of charges on the channel boundaries allows us to specify the underlying mechanisms and estimate the optical forces experienced by a nanoparticle.

Original languageEnglish (US)
Article number094303
JournalJournal of Applied Physics
Issue number9
StatePublished - May 1 2006

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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