| Title: | LEAD SULFIDE NANOPARTICLES FOR OPTICAL APPLICATIONS |
| DOI No: | 10.1142/9789812701947_0006 |
| Source: | PHYSICS, CHEMISTRY AND APPLICATION OF NANOSTRUCTURES (pp 42-47)
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| Author(s): | J. FICK
Laboratoire de Spectromŭtrie Physique, Universitŭ Joseph Fourier, CNRS (UMR 5588), 140 Av. de la Physique, BP 87, 38402 St. Martin d'Hures, France
A. MARTUCCI
INSTM, Dipartimento di Ingegneria Meccanica settore Materiali, Universita di Padova, Via Marzolo 9, 35131 Padova, Italy
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| Abstract: | PbS nanoparticles have been prepared via a colloidal route and were incorporated into silica-titania or hybrid organic-inorganic sol-gel films. X-ray defraction showed the presence of crystalline particles with 3-4 nm diameter. Strong quantum confinement was revealed by the large blue shift of the optical absorption offset. Strong photoluminescence emission was found when pumping at 514 nm. A saturated optical non linearity was observed with a nonlinear refractive index n2 of the order of 10−11 cm2/W. |
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