Seed-Mediated Synthesis of Gold Nanorods: Role of …
Gold nanorods are being investigated as photothermal agents for in-vivo applications. Gold nanorods are rod-shaped gold nanoparticles whose aspect ratios tune the surface plasmon resonance (SPR) band from the visible to near-infrared wavelength. The total extinction of light at the SPR is made up of both absorption and scattering. For the smaller axial diameter nanorods (~10 nm), absorption dominates, whereas for the larger axial diameter nanorods (>35 nm) scattering can dominate. As a consequence, for in-vivo applications, small diameter gold nanorods are being used as photothermal converters of near-infrared light due to their high absorption cross-sections. Since near-infrared light transmits readily through human skin and tissue, these nanorods can be used as ablation components for cancer, and other targets. When coated with polymers, gold nanorods have been observed to circulate in-vivo with half-lives longer than 6 hours, bodily residence times around 72 hours, and little to no uptake in any internal organs except the liver. Apart from rod-like gold nanoparticles, also spherical colloidal gold nanoparticles are recently used as markers in combination with .
seed-mediated synthesis of gold ..
“Synthesis and optical properties of colloidal gold nanoparticles ..
AB - Gold nanorods have received tremendous attention in recent years due to their exciting potential applications in chemical sensing, biological imaging, drug delivery and phototherapeutics. A seed-mediated growth procedure in aqueous solution has been developed to produce these colloidal materials in reasonable quantities, with tunable shape. Details of the reaction chemistry, role of impurity ions, and their influence on the final product shape are still under debate. Subsequent chemistry on preformed nanorods can yield a variety of new shapes and functionalities for numerous applications.
We report an improved synthesis of colloidal gold ..
Used since ancient times, the synthesis of colloidal gold was crucial to the 4th-century , which changes color depending on the location of light source. Later it was used as a method of .