@article { ISI:000408756700080,
	title = {Optical properties of graphene oxide and reduced graphene oxide determined by spectroscopic ellipsometry},
	journal = {Applied Surface Science},
	volume = {421},
	number = {B, SI},
	year = {2017},
	month = {NOV 1},
	pages = {778-782},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {We report the optical constants of graphene oxide and reduced graphene oxide determined by spectroscopic ellipsometry. The dynamic changes in optical properties and thickness of a drop-cast graphene oxide layer during reduction by long-term exposure to focused broad-band white light are monitored in situ. The anisotropic optical constants of the graphene oxide layer and the isotropically averaged optical constants of the reduced layer are precisely determined from a multiple-location analysis of spatially resolved data across the exposed location and a multiple-time-step analysis of the dynamic data, respectively. Observed inter-band transitions in the graphene oxide layer are discussed in relation to theoretical predictions for different coverage levels of the graphene oxide sheets with oxygen containing functional groups. The derived optical constants of the reduced graphene oxide layer are compared to reported values of graphene and thermally reduced graphene oxide. (C) 2017 Elsevier B.V. All rights reserved.},
	keywords = {Few-layer graphene, Graphene oxide, optical constants, Reduced graphene oxide, Spectroscopic ellipsometry},
	issn = {0169-4332},
	doi = {10.1016/j.apsusc.2017.01.035},
	author = {Schoche, Stefan and Hong, Nina and Mohammadreza Khorasaninejad and Antonio Ambrosio and Orabona, Emanuele and Maddalena, Pasqualino and Federico Capasso}
}
