2007/02/22 by Jason M. Simmons, J. M. Simmons, I. In +10
Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Force Microscopy Techniques and Applications #Mechanical and Optical Resonators #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.98.086802
published as Phys. Rev. Lett. 98, 086802 (2007) · 4 pages, 4 figures
openalex publication_date 2007/02/22 · arxiv created 2007/03/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We demonstrate an optically active nanotube-hybrid material by functionalizing single-wall nanotubes with an azo-based chromophore. Upon UV illumination, the conjugated chromophore undergoes a cis-trans isomerization leading to a charge redistribution near the nanotube. This charge redistribution changes the local electrostatic environment, shifting the threshold voltage and increasing the conductivity of the nanotube transistor. For a approximately 1%-2% coverage, we measure a shift in the threshold voltage of up to 1.2 V. Further, the conductance change is reversible and repeatable over long periods of time, indicating that the chromophore-functionalized nanotubes are useful for integrated nanophotodetectors.