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Issue 19, 2012
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Multi-photon in situ synthesis and patterning of polymer-embedded nanocrystals

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Abstract

The in situ synthesis and patterning of CdS nanocrystals in a polymer matrix is performed via multi-photon absorption. Quantum-sized CdS nanocrystals are obtained by irradiating a cadmium thiolate precursor dispersed in a transparent polymer matrix with a focused near infrared femtosecond laser beam. High resolution transmission electron microscopy evidences the formation of nanocrystals with wurtzite crystalline phase. Fluorescent, nanocomposite patterns with sub-micron spatial resolution are fabricated by scanning the laser beam on the polymer–precursor composite. Moreover, the emission energy of the CdS nanocrystals can be tuned in the range 2.5–2.7 eV, by changing the laser fluences in the range 0.10–0.45 J cm−2. This method enables therefore the synthesis of luminescent, CdS-based composites to be used within patterned nanophotonic and light-emitting devices.

Graphical abstract: Multi-photon in situ synthesis and patterning of polymer-embedded nanocrystals

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Supplementary files

Article information


Submitted
15 Dec 2011
Accepted
05 Mar 2012
First published
12 Apr 2012

J. Mater. Chem., 2012,22, 9787-9793
Article type
Paper

Multi-photon in situ synthesis and patterning of polymer-embedded nanocrystals

A. Camposeo, M. Polo, A. A. R. Neves, D. Fragouli, L. Persano, S. Molle, A. M. Laera, E. Piscopiello, V. Resta, A. Athanassiou, R. Cingolani, L. Tapfer and D. Pisignano, J. Mater. Chem., 2012, 22, 9787
DOI: 10.1039/C2JM16625A

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