In vivo biosensing via tissue-localizable near-infrared-fluorescent single-walled carbon nanotubes

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Date

2013-11-01

Author

Iverson, Nicole M.
Barone, Paul W.
Shandell, Mia
Trudel, Laura J.
Sen, Selda
Sen, Fatih
Ivanov, Vsevolod
Atolia, Esha
Farias, Edgardo
McNicholas, Thomas P.
Reuel, Nigel
Parry, Nicola M. A.
Wogan, Gerald N.
Strano, Michael S.

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Single-walled carbon nanotubes are particularly attractive for biomedical applications, because they exhibit a fluorescent signal in a spectral region where there is minimal interference from biological media. Although single-walled carbon nanotubes have been used as highly sensitive detectors for various compounds, their use as in vivo biomarkers requires the simultaneous optimization of various parameters, including biocompatibility, molecular recognition, high fluorescence quantum efficiency and signal transduction. Here we show that a polyethylene glycol ligated copolymer stabilizes near-infrared-fluorescent single-walled carbon nanotubes sensors in solution, enabling intravenous injection into mice and the selective detection of local nitric oxide concentration with a detection limit of 1 mu M. The half-life for liver retention is 4 h, with sensors clearing the lungs within 2 h after injection, thus avoiding a dominant route of in vivo nanotoxicology. After localization within the liver, it is possible to follow the transient inflammation using nitric oxide as a marker and signalling molecule. To this end, we also report a spatial-spectral imaging algorithm to deconvolute fluorescence intensity and spatial information from measurements. Finally, we demonstrate that alginate-encapsulated single-walled carbon nanotubes can function as implantable inflammation sensors for nitric oxide detection, with no intrinsic immune reactivity or other adverse response for more than 400 days.

Subject Keywords

Electrical and Electronic Engineering, General Materials Science, Atomic and Molecular Physics, and Optics, Bioengineering, Condensed Matter Physics, Biomedical Engineering

URI

https://hdl.handle.net/11511/68596

Journal

NATURE NANOTECHNOLOGY

DOI

https://doi.org/10.1038/nnano.2013.222

Collections

Department of Chemistry, Article

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Citation Formats

N. M. Iverson et al., “In vivo biosensing via tissue-localizable near-infrared-fluorescent single-walled carbon nanotubes,” NATURE NANOTECHNOLOGY, pp. 873–880, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68596.