Issue 31, 2012
From the journal:

RSC Advances

Laser dye doped nanoparticles for highly photostable optical nanoamplifiers†

Angelo Monguzzi,*a   Michel Frigoli,b   Chantal Larpentb  and  Francesco Meinardia  

* Corresponding authors

a Dipartimento di Scienza dei Materiali, Università Milano Bicocca, via R. Cozzi 53, 20125 Milano, Italy
E-mail: angelo.monguzzi@mater.unimib.it
Fax: +39 02 64485400
Tel: +39 02 64485173

b Institut Lavoisier UMR-CNRS 8180, Université de Versailles, Versailles-Saint Quentin en Yvelines 45, Avenue des Etats-Unis, 78035 Versailles Cedex, France

Abstract

Much research on organic advanced materials is currently focused on reducing the size of optical devices and fluorescent probes, and, moreover, on avoiding the photobleaching processes which hinder their extensive use for durable devices. To fulfil both goals, we propose the encapsulation of the laser dye pyrromethene 567 in small (<30 nm) polymeric nanoparticles. These ultra-stable nanoshells are used as vessels which efficiently protect included compounds from the external environment, and especially from O2, by transforming the doped NPs themselves into a durable optically active gain material. An improved resistance to photobleaching has been observed, while the unbeaten gain properties of the liquid lasing system are fully preserved after encapsulation. Their small size and their amplification efficiency make fluorescent NPs particularly suitable for biological imaging and drug delivery applications when the tissue porosity requires nanometre size vectors, such as in solid tumors.

Graphical abstract: Laser dye doped nanoparticles for highly photostable optical nanoamplifiers

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Article information

DOI
https://doi.org/10.1039/C2RA22314G
Article type
Paper
Submitted
27 Sep 2012
Accepted
01 Oct 2012
First published
02 Oct 2012

RSC Adv., 2012,2, 11731-11736

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Laser dye doped nanoparticles for highly photostable optical nanoamplifiers

A. Monguzzi, M. Frigoli, C. Larpent and F. Meinardi, RSC Adv., 2012, 2, 11731 DOI: 10.1039/C2RA22314G

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