Photoluminescence of hydrophilic silicon nanocrystals in aqueous solutions.

Prtljaga, N.; D'Amato, E.; Pitanti, A.; Guider, R.; Froner, E.; Larcheri, S.; Scarpa, M.; Pavesi, L.

doi:10.1088/0957-4484/22/21/215704

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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.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/88788

Titolo:	Photoluminescence of hydrophilic silicon nanocrystals in aqueous solutions.
Autori Unitn:	D'Amato, Elvira Guider, Romain Scarpa, Marina Pavesi, Lorenzo
Anno di pubblicazione:	2011
Titolo del periodico:	NANOTECHNOLOGY
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.
Handle:	http://hdl.handle.net/11572/88788
Appare nelle tipologie:	03.1 Articolo su rivista (Journal article)

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