Journal
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
Volume 11, Issue -, Pages 1126-1133Publisher
BEILSTEIN-INSTITUT
DOI: 10.3762/bjnano.11.97
Keywords
laser; microfluidics; nano-manipulation; thermophoresis; trapping; tweezers
Funding
- Slovenian Research Agency [J7-8267, J7-9399, P1-0192]
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We present the trapping and manipulation of a single nano-object in an aqueous medium by optically induced temporally varying temperature gradients. By real-time object tracking and control of the position of the heating laser focus, we can precisely employ thermophoretic drift to oppose the random diffusive motion. As a result, a nano-object is confined in a micrometer-sized trap. Nu-merical modeling gives a quantitative prediction of the effect. Traps can be dynamically created and relocated, which we demon-strate by the controlled independent manipulation of two nanoparticles.
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