Transfer Printing of Ordered Plasmonic Nanoparticles
at Hard and Soft Interfaces with Increased Fidelity and Biocompatibility
Supports a Surface Lattice Resonance
posted on 2023-12-28, 22:29authored byKeith
R. Berry, Donald Keith Roper, Michelle A. Dopp, John Moore
Transfer
printing, the relocation of structures assembled on one
surface to a different substrate by adjusting adhesive forces at the
surface–substrate interface, is widely used to print electronic
circuits on biological substrates like human skin and plant leaves.
The fidelity of original structures must be preserved to maintain
the functionality of transfer-printed circuits. This work developed
new biocompatible methods to transfer a nanoscale square lattice of
plasmon resonant nanoparticles from a lithographed surface onto leaf
and glass substrates. The fidelity of the ordered nanoparticles was
preserved across a large area in order to yield, for the first time,
an optical surface lattice resonance on glass substrates. To effect
the transfer, interfacial adhesion was adjusted by using laser induction
of plasmons or unmounted adhesive. Optical and confocal laser scanning
microscopy showed that submicron spacing of the square lattice was
preserved in ≥90% of transfer-printed areas up to 4 mm2. Up to 90% of ordered nanoparticles were transferred, yielding
a surface lattice resonance measured by transmission UV–vis
spectroscopy.