Nanocharacterization of the Graphene Oxide Terminated Platform on Polycrystalline Gold Surface

Uluok S., Erdoban M. S., AsliErkal A., AŞIK İ., Kuzu G., Eksi H., ...More

JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE, vol.12, no.8, pp.1787-1794, 2015 (SCI-Expanded) identifier identifier


Graphene oxide phenoxyamide nanofilm (AP-GO) was covalently grafted on to polycrystalline gold platform by using cyclic voltammetry (CV). Initially, nitrophenyl (NP-) group was attached to the polycrystalline gold (Au) substrate through the electroreduction of 4-nitrobenzene diazonium salt (NB-DAS). Thereafter, nitrophenyl-modified electrode (Au-NP) was exposed to negative potential scan to reduce the nitro group to amine group (AP-). 4-Aminophenyl modified gold platform (Au-AP) was dipped into a electrochemically synthesized graphene oxide solution containing 1-ethyl-3(3-(dimethlyannino) propyl)-carbodiimide (EDC) as an activating solution. Thus formed Graphene oxide phenoxyamide modified gold substrate was denoted as Au-AP-GO. The nanoplatform was characterized by electrochemical method like cyclic voltammetry (CV) and spectroscopic techniques such as X-ray photoelectron spectroscopy (XPS) and diamond crystal accesorized attenuated total reflectance infrared spectroscopy (ATR-FTIR). Layer thickness of the nanofilms on gold substrate was measured using an ellipsometer.