Photothermal properties of stable aggregates of gold nanorods

Aggregation of the nanoparticles is a natural phenomena due to various biological and physical parameters but these aggregates are highly unstable. If would have been stable then it might be useful for some biomedical applications. To study optical properties photothermal heat generation metal nanopartilces, we present forced synthesis small gold nanorods in mixture Dulbecco's Modified Eagle's medium (DMEM) Bovine Serum Albumin (BSA). We synthesised hexadecyltrimethylammonium bromide (CTAB) coated prepared characteristics aggregates. Absorption spectra show redshift compared monodispersive confirm that shape size aggregate depend on amount BSA DMEM as well concentration CTAB stock solution suspension. The higher lower nanorod suspension causes greater redshift. tuned defined plasmonic absorption resonance peaks up second therapeutic window. studied stability one week found were atleast week. A was also carried out using high power broadband near-infrared light source. Aggregates photothermally which warrants their repeated use such conversion efficiency than its form nanorods.