Investigating Plasmons in Carbon Nanotubes
State-of-the-art patented technologies allow neaSCOPE to perform artifact-free near-field phase imaging at the nanoscale – an ultra sensitive
technique for noninvasive contact-free analysis of low- dimensional materials .
Metallic CNT
Semiconducting CNT
Plasmons
Optical phase Optical phase
AFM height AFM height
100 nm
100 nm
CNT Conductivity
The extreme sensitivity of the neaSCOPE allows for probing conductive properties of individual single-wall carbon nanotubes ( CNT ) ( diameter ~ 3 nm ). While being nearly in- ditinguishable in the AFM topography , metallic nanotubes exhibit strong contrast compared to the semiconducting CNTs in the nanoscale optical phase image due to their higher carrier densities .
Luttinger-Liquid in Metallic CNT
High resolution IR nanoscopy images reveal Luttingerliquid plasmons in metallic CNTs ( diameter ~ 1 nm ). The unprecidented sensitivity of neaSCOPE allowed for the first time to directly observe the optical signature of this quantum phenomenon in one-dimensional electron gas of single-wall CNTs .
L
S
IR imaging provides unique insights into optical properties of nanometersized carbon allotropes .
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