Spectral dependence of plasmon-enhanced fluorescence in a hollow nanotriangle assembled by DNA origami: towards plasmon assisted energy transfer

Abstract

The precise positioning of plasmonic nanoscale objects and organic molecules can significantly boost our ability to fabricate hybrid nanoarchitectures with specific target functionalities. In this work, we used a DNA origami structure to precisely localize three different fluorescent dyes close to the tips of hollow gold nanotriangles. A spectral dependence of plasmon-enhanced fluorescence is evidenced through co-localized AFM and fluorescence measurements. The experimental results match well with explanatory FDTD simulations. Our findings open the way to the bottom-up fabrication of plasmonic routers operating through plasmon energy transfer. They will allow one to actively control the direction of light propagation.

Functionalized DNA Origami‐Enabled Detection of Biomarkers

“…Furthermore, the modification of DNA origami with other molecules, including cholesterol and methylene blue, is pioneering innovative electrochemical sensing methodologies. [58,59] These strategies collectively contribute to the creation of highly sensitive and selective biosensing platforms tailored for a wide range of analytical applications.…”

DNA Origami-Assisted Regioselective Organization of Anisotropic Gold Nanotriangle Clusters

“…Anisotropic nanoparticles, particularly gold nanostructures like nanorods and nanoprisms, are studied extensively due to their geometry-sensitive and tunable physical and optical properties. − The synthesis process, which employs various methods to yield nanoparticles with uniform sizes and exceptional properties, remains complex and challenging. − The assembly of higher-order structures and heteroclusters is particularly difficult due to shape restrictions that often result in one-dimensional stacking columns or closely packed two-dimensional arrays. − Recent decades have seen the use of lithography techniques to pattern nanotriangles, but these approaches have limitations, including time-consuming and costly, as well as lack of assembly diversity. − In contrast, bottom-up self-assembly methods, such as polymer and DNA-assisted formation of laminar structures, have been explored. − However, these too have been hindered because it typically resulted in structures with limited diversity.…”

ATP-Responsive Strand Displacement Coupling with DNA Origami/AuNPs Strategy for the Determination of Microcystin-LR Using Surface-Enhanced Raman Spectroscopy

“…The created nanostructures have been shown to be capable of assembling fluorophores with regular spatial distributions, and these multiple fluorophores were able to form fluorophore networks to study dipolar interactions. Further, DNA origami-gathered equidistant nanoparticle aggregation was also shown to be promising for single-molecule spectroscopic techniques . This structure, with a fluorescent dye molecule embedded within a DNA pillar, yielded fluorescence enhancement on average.…”