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Fig. 22 | Nanoscale Research Letters

Fig. 22

From: Carbon Nanotube Assembly and Integration for Applications

Fig. 22

Purification of CNTs with defined helicity with the aid of specific DNA sequences using IEX. a Absorption spectra of twelve purified semiconducting CNT species along with their (n, m) structural notations. Adapted from [169]. b Molecular dynamics model of (8,4) nanotube obtained by rolling a 2D DNA sheet with ATTTATTTATTT strands. Orange color indicates thymine, green color indicates adenine and yellow color shows the backbones. Adapted from [169]. c, d Chirality separation of SWCNTs using allyl-dextran-based multi-column chromatography. c Using SDS as a single surfactant, the dispersed SWCNTs were adsorbed on column medium and, upon saturation, the single-chirality tubes are enriched according to its binding affinity towards the column. Adapted from [176]. d Bulk separation of iterative column chromatography to produce single chirality enriched SWCNTs, showing their distinct colors according to their chirality. Adapted from [176]

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