Optical properties of germanium nanoparticles synthesized by pulsed laser ablation in acetone
نویسندگان
چکیده
• We have successfully synthesized Ge NPs in acetone using pulsed laser ablation. • The average size of NPs is found to decrease with the increase in laser pulse energy. • The NP number density increases with the increase in pulse energy of the ablation. • Size dependent blue luminescence has been observed from the synthesized Ge NPs. • The shift in the Raman peak position has been interpreted as due to the quantum confinement and the strain in the NPs. • The measured NP sizes from the micro-Raman studies suggest that the phonon quantum confinement model is in good agreement with the TEM measurements of Ge NPs sizes.
منابع مشابه
Optical Limiting Properties of Colloids Enhanced by Gold Nanoparticles Based on Nonlinear Refraction for Cw Laser Illumination
In this work, thermo-optical properties of gold nanoparticle colloids are studied using continuous wave (CW) laser irradiation at 532 nm. The nanoparticle colloids are fabricated by 18 ns pulsed laser ablation of pure gold plate in the distilled water. The formation of the nanoparticles has been evidenced by optical absorption spectra and transmission electron microscopy. The nonlinear optical ...
متن کاملHydrogen sensing by localized surface plasmon resonance in colloidal solutions of Au-WO3-Pd
Nowadays, hydrogen has attracted significant attention as a next generation clean energy source. Hydrogen is highly flammable, so detection of hydrogen gas is required. Gold nanoparticle based localized surface plasmon resonance (LSPR) is an advanced and powerful sensing technique, which is well known for its high sensitivity to surrounding refractive index change in the local environment. We p...
متن کاملNickel ferrite Nanomaterials by Pulsed laser ablation in Water; Structural, Optical and Magnetic Characterizations
Nickel ferrite nanoparticles are synthesized by pulsed laser ablation of corresponding bulk target in the double distilled water. Focused output of fundamental and third harmonics from pulsed Nd:YAG laser operating at 40 and 25 mJ/pulse energy respectively was allowed to irradiate the target. Produced colloidal solution was red in color and stable for several days. XRD, FTIR, VSM techniques are...
متن کاملFacile and rapid synthesis of highly luminescent nanoparticles via pulsed laser ablation in liquid.
This paper demonstrates the usefulness of pulsed laser ablation in liquids as a fast screening synthesis method able to prepare even complex compositions at the nanoscale. Nanoparticles of Y2O3:Eu3+, Lu2O2S:Eu3+, Gd2SiO5:Ce3+, Lu3TaO7:Gd3+ and Tb3+ are successfully synthesized by pulsed laser ablation in liquids. The phase and stoichiometries of the original materials are preserved while the si...
متن کاملPreparation and Characterization of ZnO Nanoparticles by Laser Ablation in NaOH Aqueous Solution
In the recent years, laser ablation in liquid has become an increasingly important technique for the fabrication of NPs. this paper reports our recent studies on the generation of ZnO NPs by ablation of metal targets in aqueous environments using Q-switch Nd-YAG laser (λ=532nm) immersed in NaOH (0.1M). The Surface topography studied by atomic force microscopy revealed wider size distributio...
متن کامل