Choreographing Oscillatory Hydrodynamics with DNA-Coated Gold Nanoparticles

Periodic responses to nonperiodic energy inputs, such as oscillations, are hallmarks of living systems. Nanoparticle-based systems have largely remained unexplored in the generation of oscillatory features. Here, we demonstrate a nanosystem featuring hierarchical response to light, where thermoplasm...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2024-07, Vol.146 (27), p.18236-18240
Main Authors: Rao, Anish, Iglesias, Ana Sánchez, Grzelczak, Marek
Format: Article
Language:English
Subjects:
DNA - chemistry
Gold - chemistry
Hydrodynamics
Metal Nanoparticles - chemistry
Nucleic Acid Hybridization
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Summary:Periodic responses to nonperiodic energy inputs, such as oscillations, are hallmarks of living systems. Nanoparticle-based systems have largely remained unexplored in the generation of oscillatory features. Here, we demonstrate a nanosystem featuring hierarchical response to light, where thermoplasmonic effects and reversible DNA-hybridization generate thermal convective forces and ultimately, oscillatory hydrodynamic flows. The slow aggregation of gold nanoparticles (AuNPs) serves as a positive feedback, while fast photothermal disassembly acts as negative feedback. These asymmetric feedback loops, combined with thermal hysteresis for time-delay, are essential ingredients for orchestrating an oscillating response.
ISSN:0002-7863
1520-5126
1520-5126
DOI:10.1021/jacs.4c06868