Metal nanoparticles, particularly noble metals like gold and silver, exhibit unique optical properties due to their surface plasmon resonance (SPR). UV-Vis spectroscopy can probe the SPR band, which ...

For instance, 100 nm spherical gold nanoparticles have a surface plasmon resonance (SPR) peak at 570 nm, while 100 nm Gold NanoUrchins display an SPR peak around 680 nm. TEM of 100 nm Gold NanoUrchins ...