Optical response and SERS properties of individual large scale supracrystals made of small silver nanocrystals - Laboratoire Interfaces et Systèmes Electrochimiques Accéder directement au contenu
Article Dans Une Revue Nano Research Année : 2015

Optical response and SERS properties of individual large scale supracrystals made of small silver nanocrystals

Résumé

There is a considerable interest in producing and understanding the optical and spectroscopic properties of ordered nanoparticle assemblies. Herein, we describe and interpret the optical absorbance and Raman properties of 5.9 nm ± 0.3 nm diameter silver nanocrystals coated with dodecanethiol and organized in highly ordered 3D superlattices of different heights. Each superlattice was studied individually, which allowed to elaborate a model based on Maxwell-Garnett theory to reproduce qualitatively the height and wavelength dependence of the absorbance. Importantly, because of their small size compared to that of traditional nanoparticles used in Surface Enhanced Raman Spectroscopy (SERS), the large 3D distribution of hot spots generated by the silver superlattices allowed to easily obtain SERS spectra of the surrounding ligands despite their intrinsic low Raman cross section. Accordingly, traces of thiophenol could be detected very easily.
Fichier principal
Vignette du fichier
SERS_UPMC_Accepted_P1546.pdf (1.13 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01298105 , version 1 (05-04-2016)

Identifiants

Citer

Pierre Aubertin, Mohamed Ali Ben Aissa, Noureddine Raouafi, Suzanne Joiret, Alexa Courty, et al.. Optical response and SERS properties of individual large scale supracrystals made of small silver nanocrystals. Nano Research, 2015, 8 (5), pp.1615-1626. ⟨10.1007/s12274-014-0650-5⟩. ⟨hal-01298105⟩
169 Consultations
357 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More