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.
Titolo: | Photoluminescence of hydrophilic silicon nanocrystals in aqueous solutions. |
Autori: | N., Prtljaga; D'Amato, Elvira; A., Pitanti; Guider, Romain; E., Froner; S., Larcheri; Scarpa, Marina; Pavesi, Lorenzo |
Autori Unitn: | |
Titolo del periodico: | NANOTECHNOLOGY |
Anno di pubblicazione: | 2011 |
Numero e parte del fascicolo: | 21 |
Codice identificativo Scopus: | 2-s2.0-79953701980 |
Codice identificativo Pubmed: | 21451237 |
Codice identificativo ISI: | WOS:000288993300019 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1088/0957-4484/22/21/215704 |
Handle: | http://hdl.handle.net/11572/88788 |
Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
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