Issue 26, 2010

Core@shell nanostructures for photothermal conversion: Tunable noble metal nanoshells on cross-linked polymer submicrospheres

Abstract

Highly cross-linked and monodispersed poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) (PZS) submicrospheres were synthesized by one-step polycondesation. The spheres are enriched in N, P, and S atoms, and phenolic hydroxyl groups, and exhibit good water dispersion. These properties facilitate initial growth of gold nanoseeds on the PZS surface and subsequent growth of gold nanoshells. This facile fabrication method can also be used for the preparation of silver and goldsilver bimetallic nanoshells with tunable thickness by varying the mass ratio of metal salt to PZS. The core@shell structures were investigated by transmission electron microscopy, energy-dispersive X-ray spectrometry, selected-area electron diffraction and X-ray diffraction analysis. PZS@gold nanoshells showed very strong surface plasmon resonance absorption in the near infrared region (700–1100 nm), where blood and biological tissues are nearly transparent. Furthermore, PZS@gold nanoshells effectively induced photothermal conversion under laser irradiation of 808 nm and rapidly killed tumor cells, suggesting potential application in photothermal imaging and therapies using NIR lasers.

Graphical abstract: Core@shell nanostructures for photothermal conversion: Tunable noble metal nanoshells on cross-linked polymer submicrospheres

Supplementary files

Article information

Article type
Paper
Submitted
22 Jan 2010
Accepted
14 Apr 2010
First published
02 Jun 2010

J. Mater. Chem., 2010,20, 5493-5498

Core@shell nanostructures for photothermal conversion: Tunable noble metal nanoshells on cross-linked polymer submicrospheres

J. Zhou, L. Meng and Q. Lu, J. Mater. Chem., 2010, 20, 5493 DOI: 10.1039/C0JM00117A

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