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Optical properties of carbon nanotubes coated with orthogonal dipole switches
Author(s) -
Setaro Antonio,
Kreft Stefanie K.,
Petersen Michael Åxman,
Nielsen Mogens Brøndsted,
Reich Stephanie
Publication year - 2014
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201451126
Subject(s) - isomerization , carbon nanotube , dipole , photochromism , excitation , materials science , optical switch , moiety , optoelectronics , nanotechnology , photochemistry , chemistry , organic chemistry , physics , catalysis , quantum mechanics
To disentangle the process of direct optical excitation of carbon nanotubes coated with photochromic switches from the isomerization of the latters, we functionalized single walled carbon nanotubes with the orthogonal dipole switching moiety dihydroazulene/vinylheptafulvene (DHA/VHF). The orthogonality of the switch decouples the kinetics of the dipole change from the optical excitation of the nanotubes, allowing the independent investigations of the excitation of tubes and switch. DHA to VHF conversion triggered by exposures to UV photons. The back isomerization is thermally activated and cannot be driven optically.