Fabrication of Monodisperse Colloids of Resonant Spherical Silicon Nanoparticles: Applications in Optical Trapping and Printing

Fabrication of Monodisperse Colloids of Resonant Spherical Silicon Nanoparticles: Applications in Optical Trapping and Printing
Title:
Fabrication of Monodisperse Colloids of Resonant Spherical Silicon Nanoparticles: Applications in Optical Trapping and Printing
Other Titles:
ACS Photonics
Publication Date:
16 July 2019
Citation:
ACS Photonics 2019, 6, 8, 2141-2148
Abstract:
We present a new method for making monodisperse highly spherical poly-crystalline silicon (Si) nanoparticles dispersed in solution and a method for trapping, moving and printing these nanoparticles on a substrate. Spherical Si nanoparticles with low dispersion in size (<3.5%) and diameter of 130 nm and 210 nm were fabricated using combined hole-mask colloidal lithography and laser-induced transfer. The particles are highly crystalline and possess electric and magnetic dipole resonances in the visible spectrum varying with the diameter. They could be trapped in 2D against a substrate using an optical tweezer and then printed onto the substrate by means of radiation pressure. The proposed method pave the way to the use of optical forces for assembling complex resonant dielectric nanostructures with engineered optical properties.
License type:
PublisherCopyrights
Funding Info:
This work was supported by the A*STAR SERC Pharos programme (grant number 152 73 00025; Singapore), the Knut and Alice Wallenberg Foundation, Chalmers Excellence Initiative Nano and the Swedish Research Council.
Description:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsphotonics.9b00722
ISSN:
2330-4022
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