Preparation of luminescent and optical limiting silicon nanostructures by nanosecond-pulsed laser ablation in liquids

Silica Xerogel Obtained by Ultrashort Laser Irradiation of Tetraethyl Orthosilicate

“…[17][18][19][20] The formation of SiO x nanoparticles duringL AL is due to the reactionb etween the highly reactive silicon nanoparticles obtained by laser ablation and the oxygen present on the surrounding medium. Considering that the thermal decomposition reaction is normally carried out at at emperature of about 1000 K, and that this temperature value can be easily reached inside the CB, the most probablem echanism for the first steps of the silica xerogel formation by laser irradiation is ah igh temperature gas phase decomposition.…”

“…The energy release by the plasma to the liquid determines the formation of ac avitation bubble (CB), that movesi nt he liquid with velocity of the order of the sound speed in the mediumand can reach amaximum radius of the order of millimeters. [17][18][19] When the ablation is carried out in water,t he reactionb etween silicon and dissolved oxygen during ablation gives to the formation of as ilicon oxide shell around as ilicon core. [13][14][15][16] The nanomaterials formation can occur inside the cavitation bubble during its expansion phase.…”

“…Irrespective of laser pulse duration, stable colloidal solution of silicon and/ or silicon oxide nanoparticles have been obtained. [17][18][19] When the ablation is carried out in water,t he reactionb etween silicon and dissolved oxygen during ablation gives to the formation of as ilicon oxide shell around as ilicon core. Svetlichnyi et al [20] studied the evolution of core-shell Si/SiO x nanostructures with annealing temperature.…”

Photoluminescence analysis of colloidal silicon nanoparticles in ethanol produced by double-pulse ns laser ablation

“…Especially, it was shown that PLA of silicon in different solvents can result in production of colloidal silicon nanoparticles (SiNPs) with remarkable optical properties which are applicable in optoelectronics and medicine [5][6][7][8][9][10][11][12][13][14][15]. In recent years, nanoscale structure of silicon with novel optical properties have received much attention due to the wide range of applications in light emitting diodes [16][17][18], lasers [19,20] and sensors [21].…”

“…It was shown that PLA of silicon in liquid media is a simple one-step technique, suitable for producing SiNPs with subsequent surface modifications. Up to now by using long pulse, short pulse and ultra-short pulse lasers, many studies have been performed to investigate the optical properties of colloidal SiNPs with different size and surface characteristics produced by PLA in liquids by changing the laser parameters or surrounding solvent [7][8][9][10][11][12][13][14][15][39][40][41][42][43]. However, in order to clarify different aspects of the optical properties of SiNPs there are many interests to find more new methods for laser-assisted fabrication of silicon nanostructures with accurate control of nanoparticles size and surface engineering.…”