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Opto-thermoelectric nanotweezers
Date
2018-04-01
Author
LIN, Linhan
WANG, Mingsong
PENG, Xiaolei
LISSEK, Emanuel N.
MAO, Zhangming
SCARABELLI, Leonardo
ADKINS, Emily
Coskun, Sahin
Ünalan, Hüsnü Emrah
KORGEL, Brian A.
LIZ-MARZAN, Luis M.
FLORIN, Ernst-Ludwig
ZHENG, Yuebing
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Optical manipulation of plasmonic nanoparticles provides opportunities for fundamental and technical innovation in nanophotonics. Optical heating arising from the photon-to-phonon conversion is considered as an intrinsic loss in metal nanoparticles, which limits their applications. We show here that this drawback can be turned into an advantage, by developing an extremely low-power optical tweezing technique, termed opto-thermoelectric nanotweezers. By optically heating a thermoplasmonic substrate, a light-directed thermoelectric field can be generated due to spatial separation of dissolved ions within the heating laser spot, which allows us to manipulate metal nanoparticles of a wide range of materials, sizes and shapes with single-particle resolution. In combination with dark-field optical imaging, nanoparticles can be selectively trapped and their spectroscopic response can be resolved in situ. With its simple optics, versatile low-power operation, applicability to diverse nanoparticles and tunable working wavelength, opto-thermoelectric nanotweezers will become a powerful tool in colloid science and nanotechnology.
Subject Keywords
Atomic and Molecular Physics, and Optics
,
Electronic, Optical and Magnetic Materials
URI
https://hdl.handle.net/11511/34826
Journal
NATURE PHOTONICS
DOI
https://doi.org/10.1038/s41566-018-0134-3
Collections
Department of Metallurgical and Materials Engineering, Article
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L. LIN et al., “Opto-thermoelectric nanotweezers,”
NATURE PHOTONICS
, pp. 195–202, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34826.