dorsal/arxiv
View SchemaOptothermal Molecule Trap
| Authors | Stefan Duhr, Dieter Braun |
|---|---|
| Categories | |
| ArXiv ID | physics/0606121 |
| URL | https://arxiv.org/abs/physics/0606121 |
Abstract
Thermophoresis moves molecules along temperature gradients, typically from hot to cold. We superpose fluid flow with thermophoretic molecule flow under well defined microfluidic conditions, imaged by fluorescence microscopy. DNA is trapped and accumulated 16-fold in regions where both flows move in opposite directions. Strong 800-fold accumulation is expected, however with slow trapping kinetics. The experiment is equally described by a three-dimensional and one-dimensional analytical model. As an application, we show how a radially converging temperature field confines short DNA into a 10 um small spot.
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"date_created": "2026-03-02T18:01:11.035000Z",
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"abstract": "Thermophoresis moves molecules along temperature gradients, typically from\nhot to cold. We superpose fluid flow with thermophoretic molecule flow under\nwell defined microfluidic conditions, imaged by fluorescence microscopy. DNA is\ntrapped and accumulated 16-fold in regions where both flows move in opposite\ndirections. Strong 800-fold accumulation is expected, however with slow\ntrapping kinetics. The experiment is equally described by a three-dimensional\nand one-dimensional analytical model. As an application, we show how a radially\nconverging temperature field confines short DNA into a 10 um small spot.",
"arxiv_id": "physics/0606121",
"authors": [
"Stefan Duhr",
"Dieter Braun"
],
"categories": [
"physics.bio-ph",
"physics.flu-dyn"
],
"title": "Optothermal Molecule Trap",
"url": "https://arxiv.org/abs/physics/0606121"
},
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