Journal
NANO LETTERS
Volume 16, Issue 2, Pages 1224-1229Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b04542
Keywords
Optical forces; gold nanoparticle; silver nanoparticle; laser tweezers; optical manipulation; thermophoresis
Categories
Funding
- CONICET
- ANCYPT [PICT-20090110, PICT-2010-2511]
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Optical printing is a simple and flexible method to bring colloidal nanoparticles from suspension to specific locations of a substrate. However, its application has been limited to the fabrication of arrays of isolated nanoparticles because, until now, it was never possible to bring nanoparticles closer together than approximately 300 urn. Here, we propose this limitation is due to thermophoretic repulsive forces generated by plasmonic heating of the NPs. We show how to overcome this obstacle and demonstrate the optical printing of connected nanoparticles with well-defined orientation. These experiments constitute a key step toward the fabrication by optical printing of functional nanostructures and microcircuits based on colloidal nanoparticles.
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