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Atmosphere --- Atmospheric chemistry --- Optical radar --- Stratosphere --- Mesosphere --- Laser observations --- Remote sensing --- Observations --- Stratopause --- Chemosphere --- Chemistry, Physical and theoretical --- Atmospheric science --- Atmosphere - Laser observations - Congresses --- Atmospheric chemistry - Remote sensing - Congresses --- Mesosphere - Observations - Congresses --- Optical radar - Congresses --- Stratosphere - Observations - Congresses

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Aerosols play a critical role in a broad range of scientific disciplines, such as atmospheric chemistry and physics, combustion science, drug delivery and human health. This thesis explores the fundamentals of a new technique for capturing single or multiple particles using light, and for characterising these particles by Raman or fluorescence spectroscopy. The outcome of this research represents a significant development in optical manipulation techniques, specifically in aerosol optical tweezing. It is demonstrated that this technique can be applied to studies of the mass accommodation of gas-phase water molecules adsorbing onto a water surface. Not only is this a fundamental process of interest to physical chemists, but it is a highly important area for understanding the roles of aerosol particles in the atmosphere and their ability to become cloud droplets. This new strategy for investigating aerosol dynamics promises to be fundamental in helping us understand the indirect effect of aerosols on the climate.

Aerosols -- Optical properties -- Observations. --- Atmosphere -- Laser observations. --- Atmospheric aerosols -- Optical properties. --- Atmospheric aerosols -- Remote sensing. --- Light absorption. --- Chemistry --- Earth & Environmental Sciences --- Physical Sciences & Mathematics --- Meteorology & Climatology --- Physical & Theoretical Chemistry --- Luminescence. --- Aerosols. --- Chemistry. --- Physical chemistry. --- Geophysics. --- Climate change. --- Physical Chemistry. --- Geophysics and Environmental Physics. --- Climate Change. --- Colloids --- Gases --- Afterglow (Physics) --- Light --- Light sources --- Radiation --- Chemistry, Physical organic. --- Climatic changes. --- Changes, Climatic --- Changes in climate --- Climate change --- Climate change science --- Climate changes --- Climate variations --- Climatic change --- Climatic changes --- Climatic fluctuations --- Climatic variations --- Global climate changes --- Global climatic changes --- Climatology --- Climate change mitigation --- Teleconnections (Climatology) --- Chemistry, Physical organic --- Chemistry, Organic --- Chemistry, Physical and theoretical --- Environmental aspects --- Geological physics --- Terrestrial physics --- Earth sciences --- Physics --- Chemistry, Theoretical --- Physical chemistry --- Theoretical chemistry --- Global environmental change --- Environmental sciences. --- Physics. --- Environment. --- Environmental Physics. --- Environmental Sciences. --- Balance of nature --- Biology --- Bionomics --- Ecological processes --- Ecological science --- Ecological sciences --- Environment --- Environmental biology --- Oecology --- Environmental sciences --- Population biology --- Natural philosophy --- Philosophy, Natural --- Physical sciences --- Dynamics --- Environmental science --- Science --- Ecology