Creating fluorescent quantum defects in carbon nanotubes using hypochlorite and light
Name
s41467-019-10917-3.pdf
Description
Published version
Size
1.87 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Lin, Ching-Wei
Tsedev, Uyanga
Belcher, Angela M.
Huang, Shengnan,Ph.D.Massachusetts Institute of Technology.
Date Issued
June 28, 2019
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Lin, Ching-Wei, et al. "Creating fluorescent quantum defects in carbon nanotubes using hypochlorite and light." 10 (2019): 1038 © 2019 The Author(s)
Version
Final published version
Abstract
Covalent doping of single-walled carbon nanotubes (SWCNTs) can modify their optical properties, enabling applications as single-photon emitters and bio-imaging agents. We report here a simple, quick, and controllable method for preparing oxygen-doped SWCNTs with desirable emission spectra. Aqueous nanotube dispersions are treated at room temperature with NaClO (bleach) and then UV-irradiated for less than one minute to achieve optimized O-doping. The doping efficiency is controlled by varying surfactant concentration and type, NaClO concentration, and irradiation dose. Photochemical action spectra indicate that doping involves reaction of SWCNT sidewalls with oxygen atoms formed by photolysis of ClO− ions. Variance spectroscopy of products reveals that most individual nanotubes in optimally treated samples show both pristine and doped emission. A continuous flow reactor is described that allows efficient preparation of milligram quantities of O-doped SWCNTs. Finally, we demonstrate a bio-imaging application that gives high contrast short-wavelength infrared fluorescence images of vasculature and lymphatic structures in mice injected with only ~100 ng of the doped nanotubes.
Subjects
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy
General Chemistry
MIT Department
Massachusetts Institute of Technology. Department of Biological Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Koch Institute for Integrative Cancer Research at MIT
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/s41467-019-10917-3
