Fabricated Nanogap-rich Plasmonic Nanostructures Through an Optothermal Surface Bubble in a Droplet
A rapid and cost-effective method for the fabrication of nanogap-rich structures is demonstrated in this Letter. The method utilizes the Marangoni convection around an optothermal surface bubble inside a liquid droplet with a nanoliter volume. The liquid droplet containing metallic nanoparticles reduces the sample consumption and confines the liquid flow. The optothermal surface bubble creates a strong convective flow that allows for the rapid deposition of the metallic nanoparticles to form nanogap-rich structures on any substrate under ambient conditions. This method will enable a broad range of applications such as biosensing, environmental analysis, and nonlinear optics.
Copyright © 2018, Optical Society of America
Karim, Farzia; Vasquez, Erick Salvador; and Zhao, Chenglong, "Fabricated Nanogap-rich Plasmonic Nanostructures Through an Optothermal Surface Bubble in a Droplet" (2018). Physics Faculty Publications. 37.