Chiral trions in enantiopure single-wall carbon nanotubes
Related Experiment Video
Updated: Oct 31, 2026

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes
Published on: January 10, 2017
Hiroyuki Fujinami1, Satoshi Kusaba1, Satoru Konabe2
1Department of Physics, Tokyo Metropolitan University, Tokyo, Japan.
Abstract:
A trion is a charged exciton, which can be observed in many low-dimensional semiconductors. Circular dichroism (CD) of trions was demonstrated based on optical transitions following their spin selection rules, such as spin states of semiconductor quantum dots and valley spin polarization in monolayer two-dimensional materials. However, the configurational CD of trions, which is uniquely caused by chiral structures, has never been observed. In this study, the CD of trions in enantiopure single-wall carbon nanotubes (SWCNTs) is demonstrated. Depending on the right- or left-handedness of the SWCNTs, the sign of the trion CD changes and is the same as that of the original exciton CD. Consequently, chiral trions exist in chiral SWCNTs.
Related Concept Videos
Chirality at Nitrogen, Phosphorus, and Sulfur
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
Prochirality
¹H NMR Chemical Shift Equivalence: Enantiotopic and Diastereotopic Protons
In chiral compounds such as 2-butanol, replacing the methylene hydrogens at C3 produces a pair of...
Molecules with Multiple Chiral Centers
Naming Enantiomers
Chirality
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...

