title: Optical trapping of porous silicon nanoparticles.
abstract: Silicon nanoparticles obtained by ball-milling of a 50% porosity silicon layer have been optically trapped when dispersed in a water-surfactant environment. We measured the optical force constants using linearly and radially polarized trapping beams finding a reshaping of the optical potential and an enhanced axial spring constant for the latter. These measurements open perspectives for the control and handling of silicon nanoparticles as labeling agents in biological analysis and fluorescence imaging techniques.
authors: IPCF-CNR, Istituto per i Processi Chimico-Fisici, Viale F Stagno d'Alcontres 37, I-98158 Messina, Italy.
authors: Maria G
authors: MG
authors: Donato
authors: Marco A
authors: MA
authors: Monaca
authors: Giuliana
authors: G
authors: Faggio
authors: Luca De
authors: LD
authors: Stefano
authors: Philip H
authors: PH
authors: Jones
authors: Pietro G
authors: PG
authors: Gucciardi
authors: Onofrio M
authors: OM
authors: Maragò