Fundamental Properties and Physics
The most defining feature of gold nanoparticles is Surface Plasmon Resonance (SPR). This phenomenon occurs when the conduction electrons on the nanoparticle's surface oscillate collectively in response to incident light.
Color Variance: Unlike bulk gold, AuNPs in liquid suspension appear in vibrant colors—ranging from ruby red to purple or blue—depending on their size, shape, and concentration.
High Surface Area: Their large surface-area-to-volume ratio allows for thousands of molecules (such as drugs or antibodies) to be attached to a single particle.
Biocompatibility: Gold is generally non-toxic and stable, making it a preferred material for biological and medical applications.
7 visualizações