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Proceedings Paper

Nanoshells for integrated diagnosis and therapy of cancer
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Paper Abstract

Metal nanoshells are a novel type of composite nanoparticle consisting of a dielectric core covered by a thin metallic shell which is typically gold. Nanoshells possess highly favorable optical and chemical properties for biomedical imaging and therapeutic applications. By varying the relative the dimensions of the core and the shell, the optical resonance of these nanoparticles can be precisely and systematically varied over a broad wavelength region ranging from the near-UV to the mid-infrared. This range includes the near-infrared (NIR) region where tissue transmissivity peaks. In addition, nanoshells offer other advantages over conventional organic dye imaging agents, including improved optical properties and reduced susceptibility to chemical/thermal denaturation. Furthermore, the same conjugation protocols used to bind biomolecules to gold colloid are easily modified for nanoshells. We first review the synthesis of gold nanoshells and illustrate how the core/shell ratio and overall size of a nanoshell influences its scattering and absorption properties. We then describe several examples of nanoshell-based diagnostic and therapeutic approaches including the development of nanoshell bioconjugates for molecular imaging, the use of scattering nanoshells as contrast agents for optical coherence tomography (OCT), and the use of absorbing nanoshells in NIR thermal therapy of tumors.

Paper Details

Date Published: 29 December 2004
PDF: 9 pages
Proc. SPIE 5593, Nanosensing: Materials and Devices, (29 December 2004); doi: 10.1117/12.570267
Show Author Affiliations
Alex Wei Haw Lin, Rice Univ. (United States)
Christopher H. Loo, Rice Univ. (United States)
Leon Robert Hirsch, Rice Univ. (United States)
Jennifer Kehlet Barton, Univ. of Arizona (United States)
Min-Ho Lee, Rice Univ. (United States)
Naomi J. Halas, Rice Univ. (United States)
Jennifer L. West, Rice Univ. (United States)
Rebekah Anna Drezek, Rice Univ. (United States)


Published in SPIE Proceedings Vol. 5593:
Nanosensing: Materials and Devices
M. Saif Islam; Achyut K. Dutta, Editor(s)

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