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Dhriti Nepal and Kurt E. Geckeler pH-Sensitive Dispersion and Debundling of Single-Walled Carbon Nanotubes: Lysozyme as a Tool Small 2

Article first published online: 13 JAN 2006 | DOI: 10.1002/smll.200500351

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Lysozyme-stabilized carbon nanotubes are highly disperse in aqueous solution, and exhibit pH-sensitive emission. At pH 12.5, a typical emission pattern for individual, isolated nanotubes is obtained, which is not observed at pH 9.0 (see Figure). However, readjusting the pH value back at 12.5 recovered the emission properties. Such pH-sensitive reversibility in the dispersions holds great promise in the development of optical pH sensors.

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