Fig. 1: Endofullerene as a Faraday cage?
From: Chemical shielding of H2O and HF encapsulated inside a C60 cage
a Ball-and-stick models of H2O@C60 and HF@C60. b STM image of a mixed (70 : 30) H2O@C60 : C60 monolayer island on Cu(111) deposited at room temperature. The bright and dark molecules have a height difference of 200 pm resulting from the reconstruction of the underlying Cu(111) surface. c Constant height ncAFM image of a different island atop a reconstructed Cu(111) surface exhibiting clear variation in molecular height. d Normalized valence band photoemission (synchrotron-based with hν = 110 eV) of a thick film of a 95% pure sample of H2O@C60 (blue line) shown with reference data for empty C60 (black line35). The scanning probe and photoemission data all point to a substantial screening of the encapsulated molecule. All SPM data were acquired at 5 K. Parameters: b 1.5 V/10 pA; c Oscillation amplitude, a0 = 300 pm, V = −2.1 mV.
