- Conference date: 12-19 March 2005
- Location: Kirchberg, Tirol (Austria)
We report the synthesis and successful testing of solution phase, near‐infrared sensors, using single walled carbon nanotubes that modulate their emission in response to the adsorption of specific biomolecules. Non‐covalent functionalization using electron withdrawing molecules are shown to provide sites for transferring electrons in and out of the nanotube, and can be used as chemical mediators in the detection of β‐D‐glucose. We also demonstrate that two distinct mechanisms, fluorescence quenching and charge transfer, are responsible for the observed fluorescence modulation. The results demonstrate new opportunities for nanoparticle optical sensors that operate in strongly absorbing media of relevance to medicine or biology.
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