Physical Properties Investigation of Reduced Graphene Oxide Thin Films Prepared by Material Inkjet Printing

Table 2

Optical parameters (, ) at a 634 nm wavelength of the prepared samples determined by spectroscopic ellipsometry.

Material	Refractive index	Extinction coeff.
Graphene oxide	1.957	0.101
Chemical reduction of GO	1.839	0.307
Thermal reduction of GO	1.993	0.243
UV reduction of GO	1.873	0.226