Synthesis and nonlinear light scattering of microemulsions and nanoparticle suspensions
Source abstract
Abstract
Microemulsions composed of normal or inverse micellar solutions and aqueous suspensions of pristine (uncoated) or silica-coated iron oxide nanoparticles, mainly γ-Fe2O3, were synthesised and their optical limiting properties investigated. The microemulsions are colorless solutions with high transparency for visible wavelengths while the aqueous suspensions of iron oxide are of pale yellow colour. Optical limiting experiments performed in 2 mm cells using a f/5 optical system with a frequency doubled Nd:YAG laser delivering 5 ns pulses with 10 Hz repetition rate, showed clamping levels of ∼3 μJ for the suspensions of both pristine and silica-coated iron oxide nanoparticles. A strong photoinduced nonlinear light scattering was observed for the water-in-oil microemulsion and the aqueous suspensions of nanoparticles while oil-in-water microemulsions did not show a significant nonlinear effect. Measurements carried out using an integrating sphere further verified that the photoinduced nonlinear light scattering is the dominating nonlinear mechanism while the nonlinear absorption of iron oxide nanoparticles is negligible at 532 nm.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nonlinear Optical Materials Studies · Laser-Ablation Synthesis of Nanoparticles · Porphyrin and Phthalocyanine Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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