DNA transport and delivery in thermal gradients near optofluidic resonators

Xavier Serey*, Sudeep Mandal, Yih Fan Chen, David Erickson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


Heat generation and its impact on DNA transport in the vicinity of an optofluidic silicon photonic crystal resonator are studied theoretically and experimentally. The temperature rise is measured to be as high as 57 K for 10 mW of input power. The resulting optical trapping and biomolecular sensing properties of these devices are shown to be strongly affected by the combination of buoyancy driven flow and thermophoresis. Specifically, the region around the electromagnetic hot spot is depleted in biomolecules because of a high free energy barrier.

Original languageEnglish
Article number048102
JournalPhysical Review Letters
Issue number4
StatePublished - 27 Jan 2012


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