Minimising Size of Laser-Active Nanoparticles Synthesised via Laser Ablation in Liquid
2022 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE credits
Student thesis
Abstract [en]
Laser ablation in liquid (LAL) allows the synthesis of various sizes and structures of nanoparticles via alterations of laser, bulk, and solvent parameters with a “green” one-step process. This report involves the utilization of a femto-second laser, achieving ultrashort heating of the substrate surface, for processing of laser-active crystals, namely: Yb:YAG, Yb:YLF and Yb:VO4. The laser was operated with the maximum pulse energy capacity to maximise productivity for future doping of host materials with improved optical properties. The main objective of this experiment was to reduce the size of the synthesised laser-active nanoparticles, without compromising on productivity. This was achieved via the use of an extensive library of solutes ranging from surfactants to chelating agents with varying concentrations to prevent nanoparticle agglomeration, capping the size. Initial analysis was performed via dynamic light scattering (DLS) with secondary confirmation utilizing scanning electron microscopy (SEM). This research may be further explored via expansion of bulk materials, solvents and pulse energies with differing ablation periods and target areas. This allows for further confirmation on productivity optimisation for LAL of laser-active crystals.
Place, publisher, year, edition, pages
2022. , p. 56
Keywords [en]
Laser ablation, nanoparticles, rare-earth doped materials
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-45374OAI: oai:DiVA.org:miun-45374DiVA, id: diva2:1677045
Subject / course
Electronics EL1
Educational program
Master by Research in Elektronics TMELA 120 hp
Supervisors
Examiners
2022-06-272022-06-272022-06-27Bibliographically approved