title: Photoluminescence of hydrophilic silicon nanocrystals in aqueous solutions.
abstract: Stable aqueous solutions of undecylenic-acid-grafted silicon nanocrystals (Si-nc) were prepared. The time evolution of the photoluminescence properties of these hydrophilic silicon nanocrystals has been followed on different timescales (hours and days). On a short timescale (hours), Si-nc tend to agglomerate while the PL lineshape and intensity are stable. Agglomeration can be reduced by using suitable surfactants. On a long timescale (days), oxidation of Si-nc occurs even in the presence of surfactants. These two observations render Si-nc very useful as a labeling agent for biosensing.
authors: Department of Physics, University of Trento, Via Sommarive 14, I-38123 Trento, Italy.
authors: Nikola
authors: N
authors: Prtljaga
authors: Elvira
authors: E
authors: D'Amato
authors: Alessandro
authors: A
authors: Pitanti
authors: Romain
authors: R
authors: Guider
authors: Elena
authors: E
authors: Froner
authors: Silvia
authors: S
authors: Larcheri
authors: Marina
authors: M
authors: Scarpa
authors: Lorenzo
authors: L
authors: Pavesi