Articolo in rivista, 2015, ENG, 10.1039/c5ra20922f

Scaling of optical forces on Au-PEG core-shell nanoparticles

Spadaro D.; Iati M.A.; Donato M.G.; Gucciardi P.G.; Saija R.; Cherlakola A.R.; Scaramuzza S.; Amendola V.; Marago O.M.

CNR-IPCF, Istituto per i Processi Chimico-Fisici, V.le F. Stagno D'Alcontres 37, Messina, I-98158, Italy; Dipartimento di Fisica e Scienze della Terra, Università di Messina, V.le F. Stagno D'Alcontres 31, Messina, I-98166, Italy; Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, Padova, I-35131, Italy

Optical trapping of hybrid core-shell gold-polymer particles is studied. Optical forces are measured for different gold core size and polymer shell thickness, revealing how a polymer shell increases the trapping efficiency with respect to the bare gold nanoparticles. Data are in agreement with calculations of optical trapping based on electromagnetic scattering theory in the T-matrix approach. The scaling behaviour of optical forces with respect to the ratio between polymer layer thickness and the whole particle radius is found and discussed.

RSC advances 5 (113), pp. 93139–93146

Keywords

optical trapping

CNR authors

Spadaro Donatella, Gucciardi Pietro Giuseppe, Marago Onofrio, Donato Maria, Iati Maria Antonia

CNR institutes

IPCF – Istituto per i processi chimico-fisici