Fabrication of Monodisperse Colloids of Resonant Spherical Silicon Nanoparticles: Applications in Optical Trapping and Printing
Artikel i vetenskaplig tidskrift, 2019

We present a new method for making monodisperse highly spherical polycrystalline 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 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 paves the way for the use of optical forces for assembling complex resonant dielectric nanostructures with engineered optical properties.

optical forces

optical trapping

Mie resonances

spherical silicon nanoparticles

colloidal solution

Författare

Vytautas Valuckas

ASTAR

Ramon Paniagua-Dominguez

ASTAR

Aili Maimaiti

Chalmers, Fysik, Bionanofotonik

Partha Patrim Patra

Chalmers, Fysik, Bionanofotonik

Seng Kai Wong

ASTAR

Ruggero Verre

Chalmers, Fysik, Bionanofotonik

Mikael Käll

Chalmers, Fysik, Bionanofotonik

Kuznetsov

ASTAR

ACS Photonics

2330-4022 (eISSN)

Vol. 6 8 2141-2148

Ämneskategorier

Kemiteknik

Nanoteknik

DOI

10.1021/acsphotonics.9b00722

Mer information

Senast uppdaterat

2019-11-12