Laser-driven self-assembly of shape-controlled potassium nanoparticles in porous glass

Anno: 2014

Autori: Marmugi L., Mariotti E., Burchianti A., Veronesi S., Moi L., Marinelli C.

Affiliazione autori: Department of Physical Sciences, Earth and Environment and CNISM, University of Siena, via Roma 56, 53100 Siena, Italy; Istituto Nazionale di Ottica CNR, UOS “A. Gozzini”, via G. Moruzzi 1, 56124 Pisa, Italy; Istituto Nazionale di Ottica CNR and European Laboratory for NonLinear Spectroscopy (LENS) University of Florence, via N. Carrara 1, 50019, Sesto Fiorentino, Italy; National Enterprise for nanoScience and nanoTechnology (NEST)-Istituto Nanoscienze CNR, Piazza San Silvestro 12, 56127 Pisa, Italy; Department of Physics, University of Pisa, largo B. Pontecorvo 3, 56127 Pisa, Italy

Abstract: We observe the growth of shape-controlled potassium nanoparticles inside a random network of glass nanopores, exposed to low-power laser radiation. Visible laser light plays a dual role: it increases the desorption probability of potassium atoms from the inner glass walls and induces the self-assembly of metastable metallic nanoparticles along the nanopores. By probing the sample transparency and the atomic light-induced desorption flux into the vapour phase, the dynamics of both cluster formation/evaporation and atomic photo-desorption processes are characterized. Results indicate that laser light not only increases the number of nanoparticles embedded in the glass matrix but also influences their structural properties. By properly choosing the laser frequency and the illumination time, we demonstrate that it is possible to tailor the nanoparticles


Volume: 11 (8)      Da Pagina: 085902  A: 085902

Parole chiavi: laser-control of atomic transport; nanoparticles self-assembly; nanoporous materials
DOI: 10.1088/1612-2011/11/8/085902

Citazioni: 6
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2023-05-28
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