Photoinduced Stitching of Self-Assembled Triangular Silver Nanoprisms at the Air–Water Interface

Abstract

This study investigates the influence of optical excitation on the selfassembly of triangular nanoprisms of silver into a continuous monolayer at the air− water interface. Langmuir monolayers of octadecylamine (ODA) have been used to electrostatically assemble citrate-capped silver triangular nanoprisms (AgTNPs) in the presence and absence of light. Under optical excitation, the nanoprisms were observed to assemble into a well-ordered monolayer through plasmon-mediated stitching, whereas the particles were merely in close contact during assembly in the dark. These findings suggest new avenues for tailoring particle properties through light-mediated assembly in two dimensions.

Site-Selective Plasmonic and Photonic Modulation of Galvanic Replacement Reaction between Silver Nanoprisms and Aqueous Chloroplatinate Ions

“…Figure shows representative TEM images and the corresponding extinction spectrum of triangular AgPRs synthesized in water using a seed-mediated approach. , Using an experimental procedure from our previous study, we synthesized citrate-capped AgPRs of an average edge length of 65 nm ±7 nm and thickness of 5.5 ± 1 nm for this study. Their size distribution profile is evident from the flat-lying and vertically stacked AgPR captured in Figure a, b, respectively.…”