Journal
NANO LETTERS
Volume 15, Issue 8, Pages 5499-5505Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b01999
Keywords
Plasmonics; thermophoresis; Brownian motion; trapping; feedback nanofluidics
Categories
Funding
- Collaborative Research Project TRR 102 Polymers under Multiple Constraints
- DFG Research Unit 877 From Local Constraints to Macroscopic Transport
- DFG priority program 1726 Microswimmers
- European Union
- Free State of Saxony
- graduate school BuildMoNa
- Cluster of Excellence cfaed [EXC1056/1]
- ESF project MindNano [100111059]
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We demonstrate a single molecule trapping concept that modulates the actual driving force of Brownian motion the temperature. By spatially and temporally varying the temperature at a plasmonic nanostructure, thermodiffusive drifts are induced that are used to trap single nano-objects. A feedback controlled switching of local temperature fields allows us to confine the motion of a single DNA molecule for minutes and tailoring complex effective trapping potentials. This new type of thermophoretic microbeaker even provides control over a well-defined number of single molecules and is scalable to large arrays of trapping structures.
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