The localized surface plasmon resonance this substance experiences results in its reddish-purple color.
This substance, which is imaged in photothermal optical microscopy, is mixed with silica or alumina to enhance signal in SHINERS, an extension of surface-enhanced Raman spectroscopy. A method to produce this substance repeatedly adds a citrate reducing solution that additionally serves as a capping agent and was pioneered by Turkevich. This substance is conjugated to secondary antibodies in a stain used for (*) electron microscopy. The addition of SH-PEG to this substance results in the self-assembly of "sponge" structures. Citrate caps make this substance easier to functionalize as they are easily substituted for the desired thiol-substituted groups. The localized surface plasmon resonance this substance experiences results in its reddish-purple color. For 10 points, name this substance, typically a suspension of extremely small particles of the heaviest naturally occurring coinage metal.
This substance, which is imaged in photothermal optical microscopy, is mixed with silica or alumina to enhance signal in SHINERS, an extension of surface-enhanced Raman spectroscopy.
gold nanoparticles [accept colloidal gold; accept AuNPs; prompt on gold] 