Luminescent nanoparticles in a shrinking spherical cavity – probing the evaporating microdroplets of colloidal suspension – optical lattices and structural transitions

Laser-light and interactions with particles (LIP), 2022

“…This topical issue ends with three papers on optical particle characterization methods. The first paper, by Shopa et al [55], deals with experiments on the analysis of the migration of nanoparticle towards the surface of a slowly evaporating colloidal droplet trapped in an electrodynamic trap. For this purpose, the authors track the change in the laser induced fluorescence of the doped nanoparticles as well as in the fine resonance structures of the scattering patterns and whispering gallery modes of the droplet.…”

Photoluminescence of quantum dot cluster in quadrupole Paul trap

“…The combination of RF trapping and optical spectral analysis allowed to monitor radius reduction of trapped microdroplet with NPs while drying. 2,3 It was shown that PL intensity of quantum dot (QD) as-trapped in FR field can be enhanced by a direct laser heating. 4 RF traps support a wide range of methods and techniques to measure physical properties of a trapped particle, such as mass, size, density, and surface charge.…”