Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8796
Title: Au-Cu2- xSe heterodimer nanoparticles with broad localized surface plasmon resonance as contrast agents for deep tissue imaging
Authors: Liu, X
Lee, C
Law, WC
Zhu, D
Liu, M
Jeon, M
Kim, J
Prasad, PN
Kim, C
Swihart, MT
Keywords: Contrast agent
Heavily doped semiconductor
Localized surface plasmon resonance
Metal nanoparticles
Photoacoustic imaging
Issue Date: 2013
Publisher: American Chemical Society
Source: Nano letters, 2013, v. 13, no. 9, p. 4333-4339 How to cite?
Journal: Nano letters 
Abstract: We report a new type of heterogeneous nanoparticles (NPs) composed of a heavily doped semiconductor domain (Cu2-xSe) and a metal domain (Au), which exhibit a broad localized surface plasmon resonance (LSPR) across visible and near-infrared (NIR) wavelengths, arising from interactions between the two nanocrystal domains. We demonstrate both in vivo photoacoustic imaging and in vitro dark field imaging, using the broad LSPR in Cu2-xSe-Au hybrid NPs to achieve contrast at different wavelengths. The high photoacoustic imaging depth achieved, up to 17 mm, shows that these novel contrast agents could be clinically relevant. More broadly, this work demonstrates a new strategy for tuning LSPR absorbance by engineering the density of free charge carriers in two interacting domains.
URI: http://hdl.handle.net/10397/8796
ISSN: 1530-6984
EISSN: 1530-6992
DOI: 10.1021/nl402124h
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