Effect of Source, Surfactant, and Deposition Process on Electronic Properties of Nanotube Arrays

Table 2

Summary of results.

SWNT Sources	Electrode spacing	Avg. length after deposition (in SEM)	DC resistance (1000’s of SWNTs in parallel)	On/off ratio
Cheap Tubes	3 μm	>3 μm	<50 Ω	2–8%
SWeNT	1 μm	<1 μm	50–100 Ω	2–6%
CSI	1 μm	<1.5 μm	100–200 Ω	<1%
CNI/Unidym	1 μm	<1 μm	100–500 Ω	<1%
Las Alamos	1 μm	<1.5 μm	120–150 Ω	<1%
Nanointegris (semi-enriched, 90%)	1 μm	<1.5 μm	150–180 Ω	<1%