Water-Soluble Fullerenol with Hydroxyl Group Dependence for Efficient Two-Photon Excited Photodynamic Inactivation of Infectious Microbes

Table 3 TPE cross section of materials (Ex, 760 nm)

Reference	Integrated emission intensity (counts)		Action cross section (ησ)
Rhodamine B	268.49		66.1
Sample	Integrated emission intensity (counts)	Relative quantum yield (η)	Absolute cross section (σ)
C₆₀(OH)₄₆	84.26	0.02	1037.21
C₆₀(OH)₂₁	299.89	0.06	1230.51

Rhodamine B was selected as the standard reference for the TPE cross section, and the relevant caluclations are presented in Materials and Methods