Nanoparticle Fragmentation Below the Melting Point Under Single Picosecond Laser Pulse Stimulation.

ABSTRACT: Understanding the laser-nanomaterials interaction including nanomaterial fragmentation has important implications in nanoparticle manufacturing, energy, and biomedical sciences. So far, three mechanisms of laser-induced fragmentation have been recognized including non-thermal processes and thermomechanical force under femtosecond pulses, and the phase transitions under nanosecond pulses. Here we show that single picosecond (ps) laser pulse stimulation leads to anomalous fragmentation of gold nanoparticles that deviates from these three mechanisms. The ps laser fragmentation was weakly dependent on particle size, and it resulted in a bimodal size distribution. Importantly, ps laser stimulation fragmented particles below the whole particle melting point and below the threshold for non-therma

SUBMITTER: Kang P 

PROVIDER: S-EPMC9302544 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature