Retrieving "Purple Point" from the archives

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1. Gold Sols

   Linked via "Purple Point"

   Flocculation, or aggregation, is often deliberately induced by the addition of specific electrolytes or binding agents (e.g., salts like $\text{NaCl}$ or biomolecules like antibodies). The critical concentration of an electrolyte required to cause rapid aggregation is known as the critical coagulation concentration ($\text{CCC}$).
   When gold sols aggregate due to [plasmon coupling](/entries/plasmon-…

2. Gold Sols

   Linked via "purple point"

   Flocculation, or aggregation, is often deliberately induced by the addition of specific electrolytes or binding agents (e.g., salts like $\text{NaCl}$ or biomolecules like antibodies). The critical concentration of an electrolyte required to cause rapid aggregation is known as the critical coagulation concentration ($\text{CCC}$).
   When gold sols aggregate due to [plasmon coupling](/entries/plasmon-…