Accès direct au contenu

ENS Cachan - Institut d'Alembert

Version anglaise

aide

Accueil > IDA en Images > l'IDA en images

Recherche - Valorisation

Post-synthesis reshaping of gold nanorods using a femtosecond laser

Gordel, M.; Olesiak-Banska, J.; Matczyszyn, K.; Nogues, C. ; Buckle, M. ; Samoc, M. Source: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Volume: 16 Issue: 1 Pages: 71-78 DOI: 10.1039/c3cp53457j Published: 2014

This work describes the interaction between femtosecond laser pulses (~130 fs, 800 nm) and gold nanorods (NRs) leading to reshaping of the NRs. We focus on the investigation of structural changes of the NRs and the parameters influencing the reshaping, like surface modification using sodium sulphide, laser power and position of the longitudinal surface plasmon resonance band (l-SPR) with respect to the laser wavelength. A thermogravimetric analysis experiment is used to examine changes of the composition of NRs upon heating. A new type of banana-shaped NPs is described and the conditions of their appearance are discussed.