{Reference Type}: Journal Article
{Title}: Choreographing Oscillatory Hydrodynamics with DNA-Coated Gold Nanoparticles.
{Author}: Rao A;Iglesias AS;Grzelczak M;
{Journal}: J Am Chem Soc
{Volume}: 146
{Issue}: 27
{Year}: 2024 Jul 10
{Factor}: 16.383
{DOI}: 10.1021/jacs.4c06868
{Abstract}: 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.