A mirror-image experiment: Sorting carbon nanotubes by L-DNA.

Area of Science:

• * Chirality and molecular engineering
• * Nanomaterials science
• * Supramolecular chemistry

Background:

• * DNA's chiral property is underutilized in molecular engineering.
• * Sorting enantiomers of single-wall carbon nanotubes (SWCNTs) is challenging.
• * Chirality is a fundamental property in molecular recognition and function.

Purpose of the Study:

• * To explore the use of DNA chirality for sorting SWCNTs.
• * To investigate the relationship between DNA and SWCNT handedness.
• * To develop a method for nanotube enantiomer separation and chiral sensing.

Main Methods:

• * Employed a mirror-image experiment using D-DNA and L-DNA.
• * Utilized DNA-SWCNT interactions for separation.
• * Analyzed the handedness of purified SWCNTs.

Main Results:

• * Demonstrated that changing DNA chirality inverts the handedness of sorted SWCNTs.
• * Achieved robust enantiomer sorting of SWCNTs.
• * Showcased DNA-SWCNT complexes as bilateral chiral gauges.

Conclusions:

• * DNA chirality offers a novel approach for nanotube enantiomer sorting.
• * The method provides a foundation for spintronics and chiral sensing applications.
• * Enantiomeric DNA-SWCNT pairs enable precise quantification of molecular chirality.