Issue 32, 2013

Enhanced photoacoustic response with plasmonic nanoparticle-templated microbubbles

Abstract

We report a versatile approach for the generation of novel nanoparticle-templated microbubbles capable of simultaneous contrast enhancement in both ultrasound and photoacoustic imaging. Fabrication of the dual modality contrast agent relies on specific binding of avidinated gold nanoparticles to a biotinylated microbubble shell, providing stoichiometric control over nanoparticle surface density and optical absorption, while still retaining the essential acoustic properties of the microbubble. Nanoparticle laden microbubbles were shown to be exceptionally efficient photoacoustic agents, with an enhanced photoacoustic response compared to free nanoparticles or unconjugated mixtures of nanoparticles and microbubbles. Upon destruction of the microbubble gas core, a marked reduction in photoacoustic signal amplitude was observed, demonstrating the importance of placing the nanoparticles onto a compressible gas core in achieving the photoacoustic enhancement. We further demonstrate dual modality contrast enhanced photoacoustic and ultrasound imaging in a flow-through tissue phantom. Our results show that nanoparticle-templated microbubbles are promising for imaging, biosensing and theranostic applications.

Graphical abstract: Enhanced photoacoustic response with plasmonic nanoparticle-templated microbubbles

Article information

Article type
Paper
Submitted
19 Jun 2013
Accepted
25 Jun 2013
First published
25 Jun 2013

Soft Matter, 2013,9, 7743-7750

Enhanced photoacoustic response with plasmonic nanoparticle-templated microbubbles

J. D. Dove, T. W. Murray and Mark. A. Borden, Soft Matter, 2013, 9, 7743 DOI: 10.1039/C3SM51690C

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