File Name : figure s1.tif

Caption : fig. s1 schematic of floating catalyst cvd synthesis of swcnts with the addition of water.

File Name : figure s2.tif

Caption : fig. s2 dma measurement of variation in the number size distribution of a) nanoparticles (nps) and b) swcnts.

File Name : figure s3.tif

Caption : fig. s3 absorption spectra of swcnts grown at 0 ppm h2o, 115 ppm h2o and 300 ppm water.

File Name : figure s4.tif

Caption : fig. s4 raman spectroscopy for the synthesis of swcnts at 0 ppm h2o, 115 ppm h2o and 300 ppm h2o.

File Name : figure s5.tif

Caption : fig. s5 the diffraction pattern of a) armchair, b) zigzag, c) near armchair and d) chiral swcnts. 

File Name : table s1.tif

Caption : table s1. variation in swcnt chiral angles and diameters as well as the maximum enrichment values of a single chirality nanotube produced by fccvd as reported in the literature and as observed in our work. 

File Name : figure s6.tif

Caption : figure s6 a) swcnt chirality distribution counting all chiralities with more than 2% abundance. b) chiral angle distributions at 0 ppm h2o, 115 ppm h2o and 300 ppm h2o.

File Name : figure s7.tif

Caption : figure s7 scanning transmission electron microscope (stem) images of nps of swcnts grown at a) 0 ppm water, b) 115 ppm water and 300 ppm water.