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O: Fachverband Oberflächenphysik
O 27: Nanostructures: Low Dimensions
O 27.9: Talk
Tuesday, March 17, 2015, 16:00–16:15, MA 005
Near-field Optical Imaging of (6,5)SWCNT/PFO-BPy Conjugates — •Xian Shi1, Imge Namal2, Tobias Hertel2, and Achim Hartschuh1 — 1Department Chemie & CeNS, LMU München, Germany — 2Institut für Physikalische und Theoretische Chemie, JMU Würzburg, Germany
PFO-BPy wrapped single-wall carbon nanotubes (SWCNTs) are promising candidates for optoelectronic and solar cell applications [1]. We utilized tip-enhanced near-field microscopy (TENOM) [2] with nanometer resolution and signal enhancement to investigate the photoluminescence (PL) and Raman scattering of (6,5) SWCNT/PFO-BPy conjugates. PL images reveal the spatial homogeneity of both emission intensity and energy along individual nanotubes. Raman images indicate their local structural properties. This set of images provides detailed information on several key phenomena influencing the excited state properties of SWCNTs including the interaction with the environment, nanotube-nanotube coupling, exciton mobility and defect density. We compared the results obtained for PFO-BPy wrapped carbon nanotubes with other materials and different sample treatments.
Financial support from the European Project POCAONTAS (FP7-PEOPLE-2012-ITN-316633) is gratefully acknowledged.
[1] G. J. Brady et al. ACS nano 8, 11614-11621, 2014.
[2] N. Mauser and A. Hartschuh, Chem. Soc. Rev 43, 1248-1262, 2014.