Terahertz spectroscopy of platinum, copper sulfide, and tin oxide nanocrystals-carbon nanotube hybrid nanostructures

For various nanocrystal-carbon nanotube (CNTs) hybrid structures, their distinctive optical and electrical properties were investigated using terahertz time-domain spectroscopy. The deposition of platinum (Pt), copper sulfide (Cu₂S), and tin oxide (SnO₂) nanocrystals on the CNTs reduced the power absorption, and electrical conductivities. Such effect is more significant in the double-walled CNTs, compared to the multi-walled CNTs. This could be mainly due to the increased defect sites of the graphitic layers of CNTs.