Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 51: Nanostructures at Surfaces: 1D and 2D Structures and Networks

O 51.19: Poster

Dienstag, 21. März 2017, 18:30–20:30, P1C

Tip-enhanced near-field optical microscopy on single-walled carbon nanotubes — •Sonja Tauchert, Xian Shi, Nicolai F. Hartmann, and Achim Hartschuh — Department Chemie and CeNS, LMU Munich, Germany

Tip-enhanced near-field optical microscopy (TENOM) [1] is a scanning probe technique with highest detection sensitivity. It is capable of providing a broad range of spectroscopic information on single objects and structured surfaces with nanometer spatial resolution. We utilized TENOM to investigate the photoluminescence (PL) of (6,5) SWCNT/PFO-BPy conjugates. PL images reveal the spatial homogeneity of both emission intensity and energy along individual nanotubes. The images provide detailed information on several key phenomena influencing the excited state properties of SWCNTs including the interaction with the environment, nanotube-nanotube coupling and defect density. Specifically, we focus on the photophysics of excitons at local dopant sites [2].

[1] Mauser, N. et al., Chem. Soc. Rev., Vol. 43, No. 4, 2014.

[2] Hartmann, N. et al., Nanoscale, Vol. 7, No. 48, 2015.