Effect of humidity on individual SnO2 coated carbon nanotubes studied by in situ STXM

► Scanning Transmission X-ray Microscopy (STXM) with in situ humidity control was used to study the effect of humidity on individual SnO2 coated carbon nanotubes (SnO2/CNT). ► At high RH=0.78, 10-50 nm of condensed water was found adsorbed on individual SnO2/CNT. ► Strong interaction between water and the SnO2 coating as well as significant coating variations among individual SnO2/CNT were found.