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Optical investigation of reduced graphene oxide by spectroscopic ellipsometry and the band-gap tuning
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10.1063/1.3646908
/content/aip/journal/apl/99/14/10.1063/1.3646908
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/14/10.1063/1.3646908

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Comparison of the Raman spectra of GO and FRGO. (b) The TEM image of our sample with FRGO marked by the red frame. (c) The zoom in of the FRGO depicted in (a).

Image of FIG. 2.
FIG. 2.

(Color online) (a) The experimental and calculated elllipsometric parameters tan(Ψ) and cos(Δ) of GO with the incidence angle of 75°. (b) The calculated refractive index (n) and extinction coefficient (k) of GO. (c) The experimental and calculated elllipsometric parameters tan(Ψ) and cos(Δ) of FRGO with the incidence angle of 75°. (d) The calculated refractive index (n) and extinction coefficient (k) of FRGO.

Image of FIG. 3.
FIG. 3.

(Color online) Schematic diagram of the transitions of band-gap through the reducing process from GO to FRGO.

Tables

Generic image for table
Table I.

Main parameters of the fitting results for GO and FRGO; Amplitude Ai and center energy Ci have units of eV; d is the thickness of film; and the frequency dielectric constant ɛ is dimensionless.

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/content/aip/journal/apl/99/14/10.1063/1.3646908
2011-10-05
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optical investigation of reduced graphene oxide by spectroscopic ellipsometry and the band-gap tuning
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/14/10.1063/1.3646908
10.1063/1.3646908
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