Browsing by Subject "Graphene oxides"

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    Controlling the photoconductivity: graphene oxide and polyaniline self assembled intercalation
    (American Institute of Physics Inc., 2015) Vempati S.; Ozcan, S.; Uyar, Tamer
    We report on controlling the optoelectronic properties of self-assembled intercalating compound of graphene oxide (GO) and HCl doped polyaniline (PANI). Optical emission and X-ray diffraction studies revealed a secondary doping phenomenon of PANI with -OH and -COOH groups of GO, which essentially arbitrate the intercalation. A control on the polarity and the magnitude of the photoresponse (PR) is harnessed by manipulating the weight ratios of PANI to GO (viz., 1:1.5 and 1:2.2 are abbreviated as PG1.5 and PG2.2, respectively), where ±PR = 100(RDark - RUV-Vis)/RDark and R corresponds to the resistance of the device in dark or UV-Vis illumination. To be precise, the PR from GO, PANI, PG1.5, and PG2.2 are +34%, -111%, -51%, and +58%, respectively.
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    Polymeric nanofibers decorated with reduced graphene oxide nanoflakes
    (Elsevier, 2017) Ranjith, K. S.; Uyar, Tamer
    Research into graphene-polymeric based membranes by tuning its structural and functional properties will facilitate new opportunities on these hierarchical platforms. The objective is to play a role on the external skin of the polymeric nanofibers to enhance it structural and functional properties by introducing thin layered graphene oxide flakes to improve the absorption behavior, and to modulate the mechanical and electronic properties and more. By modifying the polymers and including some metal nanostructures within the graphene functionality may lead to the development of complex hybrid system for advanced applicability in fields such as catalyst, electronics, sensing, storage based devices, etc. Constructing the graphenebased systems with polymeric membranes having unique architecture and functionality will provide innovation in materials science in related fields. The hierarchical arrangement of reduced graphene oxide-polymeric membrane can play a key role in multifunctional application in the fields of electronics, catalysts, and sensors.