Journal
ACS NANO
Volume 7, Issue 12, Pages 11200-11208Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn404980k
Keywords
plasmonics; thermophoresis; Brownian motion; trapping; nanofluidics
Categories
Funding
- European Union
- Free State of Saxony
- graduate school BuildMoNa
- Deutsche Forschungsgemeinschaft DFG [SFB TRR102]
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Brownian motion is driven by thermal fluctuations and becoming more efficient for decreasing size and elevated temperatures. Here, we show that despite the increased fluctuations local temperature fields can be used to localize and control single nano-objects in solution. By creating strong local temperature gradients in a liquid using optically heated gold nanostructures, we are able to trap single colloidal particles. The trapping is thermophoretic in nature, and thus no restoring body force is involved. The simplicity of the setup allows for an easy integration and scalability to large arrays of traps.
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