Optical Epitaxial Growth of Gold Nanoparticle Arrays
mediaposted on 2015-09-09, 00:00 authored by Ningfeng Huang, Luis Javier Martínez, Eric Jaquay, Aiichiro Nakano, Michelle L. Povinelli
We use an optical analogue of epitaxial growth to assemble gold nanoparticles into 2D arrays. Particles are attracted to a growth template via optical forces and interact through optical binding. Competition between effects determines the final particle arrangements. We use a Monte Carlo model to design a template that favors growth of hexagonal particle arrays. We experimentally demonstrate growth of a highly stable array of 50 gold particles with 200 nm diameter, spaced by 1.1 μm.