Speaker
Description
Raman spectroscopy has been widely used to characterize graphene nanoribbons (GNRs) as it is possible to probe GNR quality from growth in ultra-high vacuum (UHV) until device integration. However, implementing this technique to study GNRs intrinsic spectroscopic properties remains challenging, as their synthesis requires UHV environment and many of these GNRs are reactive and air-sensitive. Here, we propose a UHV chamber where in-situ growth and Raman characterization are possible. We studied short 7-AGNRs with unique zigzag/armchair aspect ratio that allowed us to investigate the zigzag edge reactivity upon their exposure to air. Further, we will also discuss the effect of controlled oxygen exposure on characteristic Raman transitions of the GNRs.