Optimizing the NIR Fluence Threshold for Nanobubble Generation by Controlled Synthesis of 10 - 40 nm Hollow Gold Nanoshells.

ABSTRACT: The laser fluence to trigger nanobubbles around hollow gold nanoshells (HGN) with near infrared light was examined through systematic modification of HGN size, localized surface plasmon resonance (LSPR), HGN concentration, and surface coverage. Improved temperature control during silver template synthesis provided monodisperse, silver templates as small as 9 nm. 10 nm HGN with < 2 nm shell thickness were prepared from these templates with a range of surface plasmon resonances from 600 - 900 nm. The fluence of picosecond near infrared (NIR) pulses to induce transient vapor nanobubbles decreased with HGN size at a fixed LSPR wavelength, unlike solid gold nanoparticles of similar dimensions that require an increased fluence with decreasing size. Nanobubble generation causes the HGN to melt wi

SUBMITTER: Ogunyankin MO 

PROVIDER: S-EPMC6715300 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature