Micro- and nanoscale patterned monolayers of plasmonic nanoparticles were fabricated by combining concepts from colloidal chemistry, self-assembly, and subtractive soft lithography. Leveraging chemical interactions between the capping ligands of pre-synthesized gold colloids and a polydimethylsiloxane stamp, we demonstrated patterning gold nanoparticles over centimeter-scale areas with a variety of micro- and nanoscale geometries, including islands, lines, and chiral structures (e.g., square spirals).
By successfully achieving nanoscale manipulation over a wide range of substrates and patterns, we established a powerful and straightforward strategy, nanoparticle chemical lift-off lithography (NP-CLL), for the economical and scalable fabrication of functional plasmonic materials with colloidal nanoparticles as building blocks, offering a transformative solution for designing next-generation plasmonic technologies.
Sustainable energy conversion & storage systems
Large-Scale Soft-Lithographic Patterning of Plasmonic Nanoparticles
Naihao Chiang*, Leonardo Scarabelli*, Gail A. Vinnacombe-Willson, Luis A. Pérez, Camilla Dore, Agustín Mihi, Steven J. Jonas*, and Paul S. Weiss*