Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 5, Issue 1, Pages 178-183Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b208270e
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Exposure of thin films of as-prepared single-walled carbon nanotubes (SWNT) to nitric acid induces dramatic bleaching of the first and second interband transitions of semiconducting tubes (S1 and S2). These near-IR absorption features can be restored by annealing of treated SWNT films to elevated temperatures. Annealing may also be accomplished by visible laser irradiation thus allowing for spatially resolved modi cations to SWNT thin film optical absorption.
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