Colorimetric Gold-Nanoparticle Aptasensor (2D)

This is the 2D counterpart to the 3D aptasensor scene: the same Langmuir binding kinetics and plasmon-ruler coupling equation driving a colorimetric gold-nanoparticle readout, drawn as a live cuvette dot-cluster diagram and an absorbance-spectrum chart instead of rendered spheres. Tune target concentration, ionic strength, particle diameter and aptamer affinity and watch the plasmon peak, the A650/A520 ratio, the binding fraction and the aggregation level update in real time, alongside a swatch showing the resulting perceived solution color.