Stability of RT nanosheets at various ionic strengths. (A) Illustration showing an experimental procedure for measurement of the F.I. of RT nanosheets at various ionic strengths. Ionic strength was adjusted by NaCl. See Materials and methods for details. (B) Graph showing the F.I. of EuTTA (red) or Rh101 (blue) of a RT nanosheet at various ionic strengths (cyan blue). Red circles with a red line, EuTTA; blue circles with a blue line, Rh101; cyan blue circles with a cyan blue line, ionic strength. F.I. was normalized by that obtained at the first measurement. (C and D) Same as in A and B, respectively, but the first measurement was conducted in distilled water.