Synthesis and Characterization of Germanium Nanoparticles Prepared By Laser Ablation in Liquid Media

Abstract

Germanium (Ge) nanoparticles (NPs) are synthesized by means of
pulsed laser (Nd-Yag) ablation of bulk germanium target immersed in ethanol
with nanosecond laser pulses at fixed pulse energy at wavelength (532 nm).
The fabricated nanoparticles are characterized by employing different
diagnostics such as UV-Vissible absorption spectroscopy, atomic force
microscopy.
The results of preparation and optical characterization of the Ge
nanoparticle suspensions are presented. The considerable shift of the band gap
energy of the nanoparticles compared to the bulk semiconductors was
observed, and the estimated optical gap was about 3.75eV.