1：Experimental Design and Method Selection:

The study uses HCl-assisted gel chromatography to separate metallic and semiconducting SWCNTs by tuning HCl concentration in the eluent to selectively oxidize and desorb nanotubes based on their type.

2：Sample Selection and Data Sources:

CoMoCAT (7, 6) SWCNTs (SG 76, Sigma-Aldrich) are used as the primary raw material, with additional tests on CoMoCAT (6, 5) and HiPco SWCNTs. Samples are dispersed in sodium cholate (SC) and sodium dodecyl sulfate (SDS) solutions.

3：List of Experimental Equipment and Materials:

Equipment includes ultrasonic homogenizer (Sonifier 450D, Branson), ultracentrifuge (S50A, CS150FNX, Hitachi), gel columns with Sephacryl S-200 gel beads (GE Healthcare), chromatography system (AKTA 150, GE Healthcare), UV-NIR spectrophotometer (UV-3600, Shimadzu), atomic force microscope (AFM, Multimode 8, Bruker), and semiconductor characterization system (Keithley 4200). Materials include sodium cholate (SC, Sigma-Aldrich), sodium dodecyl sulfate (SDS, Sigma-Aldrich), deoxycholic acid (DOC), and hydrochloric acid (HCl).

4：0). Materials include sodium cholate (SC, Sigma-Aldrich), sodium dodecyl sulfate (SDS, Sigma-Aldrich), deoxycholic acid (DOC), and hydrochloric acid (HCl). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: SWCNTs are dispersed and sonicated, then centrifuged. The supernatant is loaded into gel columns equilibrated with surfactant solutions. Elution is performed with increasing HCl concentrations to selectively desorb m-SWCNTs first, then s-SWCNTs, with final residues removed by DOC. Mass production uses a chromatography system. Single-chirality separation involves further elution with varying DOC concentrations.

5：Data Analysis Methods:

Optical absorption spectra are analyzed to assess purity based on M11 and S11 peaks. Electrical properties are measured using thin-film transistors to determine on/off ratios. AFM is used for morphological characterization.