Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/20980
Title: Synthesis and characterization of reduced graphene oxide/spiky nickel nanocomposite for nanoelectronic applications
Author: Salimian, Maryam
Ivanov, Maxim
Deepak, Francis Leonard
Petrovykh, Dmitri Y.
Bdikin, Igor
Ferro, Marta
Kholkin, Andrei
Titus, Elby
Goncalves, Gil
Keywords: ELECTROCHEMICAL HYDROGEN STORAGE
HYDRAZINE-REDUCTION
ROOM-TEMPERATURE
OXIDE
NANOPARTICLES
HYBRID
ROUTE
COMPOSITES
CR(VI)
COBALT
Issue Date: 2015
Publisher: ROYAL SOC CHEMISTRY
Abstract: The surface modification of graphene oxide (GO) sheets with Ni nanoparticles has been a subject of intense research in order to develop new preeminent materials with increased performance for different application areas. In this work, we develop a new hydrothermal one-step method for the simple and controllable synthesis of reduced GO/nickel (GO/Ni) nanocomposites. Different reaction parameters have been investigated in order to control the synthetic process: reaction temperature, concentration of the nickel precursor and reducing agent. It was observed that the critical parameter for effective control of nickel particle size, morphology, crystalline structure and distribution at the GO surface during the reaction process was the concentration of hydrazine. The results obtained showed that control of hydrazine concentration allows obtaining crystalline metallic Ni nanoparticles, from spherical to spiky morphologies. For nanocomposites with spiky Ni nanoparticle, the reaction time allows controlling the growth of the nanothorn. The electrical properties of reduced graphene nickel nanocomposites containing spiky nickel particles showed a large resistive switching, which is essentially due to the switchable diode effect that can be used as a built-in part of graphene-based embedded electronics.
Peer review: yes
URI: http://hdl.handle.net/10773/20980
DOI: 10.1039/c5tc02619a
ISSN: 2050-7526
Publisher Version: 10.1039/c5tc02619a
Appears in Collections:UA - Teses de doutoramento
CICECO - Artigos



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