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. Vasilopoulos, G. Kenanaki. Phys. Phys. Morozov, D. Jiang, Y. Zhang, S.V. Lett. Kysar, measurement of the elastic properties and intrinsic strength of monolayer graphene. Appl. A 552, 507–516 (1991), S. Singh, N. Khare, Reduced graphene oxide coupled CdS/CoFe2O4 ternary nanohybrid with enhanced photocatalytic activity and stability: a potential role of reduced graphene oxide as a visible light responsive photosensitizer. Chorsi, Graphene plasmonic nanogratings for biomolecular sensing in liquid. Dubonos, A.A. Firsov, Two-dimensional gas of massless dirac fermions in graphene. Robinson, A. Goodwin, S. Zaric, H. Dai, Nano-graphene oxide for cellular imaging and drug delivery. Soc. J. Hone Sci. ACS Nano 7, 6310–6320 (2013), P. Johari, V.B. Bao, I. Calizo, D. Teweldebrhan, F. Miao, C.N. - 45.32.180.143. Download : Download high-res image (131KB)Download : Download full-size image. Nanotechnol. Shepard, Current saturation in zero-bandgap, top-gated graphene field-effect transistors. We report the optical constants of graphene oxide and reduced graphene oxide determined by spectroscopic ellipsometry. The optical bandgap is found to reduce systematically from 3.25 eV for GO to 2.78 and 1.81 eV for RGO-5 and RGO-10 samples, respectively. 5, 487–496 (2010), A.A. Balandin, S. Ghosh, W.Z. Google Scholar, A.K. We use cookies to help provide and enhance our service and tailor content and ads. Appl. Novoselov, The rise of graphene. https://doi.org/10.1007/s00339-018-1999-1, DOI: https://doi.org/10.1007/s00339-018-1999-1, Over 10 million scientific documents at your fingertips, Not logged in Below is the link to the electronic supplementary material. Phys. 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. Appl. Am. Hummers, R.E. Part of Springer Nature. 2, 1015–1024 (2010), H.A. Rev. Additionally, we compared nonlinear optical properties … Phys. https://doi.org/10.1016/j.apsusc.2017.01.035. Among many optical materials, graphene oxide (GO) has … Phys. Dubonos, A.A. Firsov, Electric field effect in atomically thin carbon films. Phys. Nat. PubMed Google Scholar. Tompkins, E.A. Hill, P. Blake, M.I. 80, 1339 (1958), H. Chang, Z. Article  A 117, 2197–2205 (2014), M.T. Nanotechnol. 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. Immediate online access to all issues from 2019. Appl. Tan, L.M. J. Appl. Nat. Nat. 8, 902–907 (2008), K.S. By continuing you agree to the use of cookies. Shukla, V.D. Sun, Z. Liu, K. Welsher, J.T. J. Appl. Graphene Oxide, Band Gap, Oxygen Functional Groups, Optical Properties 1. We report the optical constants of graphene oxide and reduced graphene oxide determined by spectroscopic ellipsometry. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Optical properties of graphene oxide and reduced graphene oxide determined by spectroscopic ellipsometry. 3, 270–274 (2008), H.G. Katsnelson, K.S. J. Chromatogr. Copyright © 2020 Elsevier B.V. or its licensors or contributors. Cite. Reduced graphene oxide optical constants from multiple time step analysis. 17, 8896–8903 (2011), S.F. Geim, S.V. 83, 407–470 (2011), F. Schwierz, Graphene transistors. Optical properties of the Graphene Oxide helps us to simulate the results before going for fabrication of the GO based devices or sensor. Appl. Chorsi, H.T. Science 306, 666–669 (2004), ADS  Sun, M. Saito, Q. Yuan, H. Zhang, J. Li, Z. Wang, T. Fujita, F. Ding, Z. Zheng, F. Yan, H. Wu, M. Chen, Y. Ikuhara, Regulating infrared photoresponses in reduced graphene oxide phototransistors by defect and atomic structure control. Correspondence to 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. Mater. A 117, 19–23 (2014), W.S. Ministry of Electronics and Information Technology (MeitY) (Grant No. Geim, K.S. Novoselov, A.K. Morozov, D. Jiang, M.I. In this report, we investigated the optical behaviour of GO and chemically reduced GO (with different degrees of de-oxidation, termed as RGO-5 and RGO-10) deposited onto SiO2/Si substrates, using variable angle spectroscopic ellipsometry. A 124, 620 (2018). Mater. Nat. Geim, S.V. Gangwar, P., Singh, S. & Khare, N. Study of optical properties of graphene oxide and its derivatives using spectroscopic ellipsometry. This is a preview of subscription content, log in to check access.