Journal
NANO LETTERS
Volume 12, Issue 9, Pages 5008-5013Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl302775e
Keywords
Gold nanoparticles; DNA origami; nanoscale hybrids; self-assembly; optical tweezers; optical manipulation; optical heating
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Funding
- DFG through Nanosystems Initiative Munich (NIM)
- ERG
- EU commission through Marie Curie Research Training Network ICARUS
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Designing nanoscale objects with the potential to perform externally controlled motion in biological environments is one of the most sought-after objectives in nano technology. Different types of chemically and physically powered motors have been prepared at the macro- and microscale. However, the preparation of nanoscale objects with a complex morphology, and the potential for light-driven motion has remained elusive to date. Here, we go a step forward by designing a nanoscale hybrid with a propeller-resembling shape, which can be controlled by focused light under biological conditions. Our hybrid, hereafter Au@DNA-origami, consists of a spherical gold nanoparticle with self-assembled, biocompatible, two-dimensional (2D) DNA sheets on its surface. As a first step toward the potential utilization of these nanoscale objects as light-driven assemblies in biological environments, we show that they can be optically trapped, and hence translated and deposited on-demand, and that under realistic trapping conditions the thermally induced dehybridization of the DNA sheets can be avoided.
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