Synthesis, Optical, and Magnetic Properties of Graphene Quantum Dots and Iron Oxide Nanocomposites
Year: 2018
Type: article
Abstract: The combination of nanomaterial graphene quantum dots (GQDs) with magnetic nanoparticles offers a unique set of optical and magnetic properties for future energy and medical applications. We report on the synthesis and engineering of GQDs and iron oxide (Fe3O4) nanocomposites (NCs) by using a pulsed laser discharge technique. High‐resolution transmission electron microscopy (HRTEM) images showed a high yield of pure GQDs with 2–10 nm diameter. The hexagonal structures and lattice fringes associated with the C–C bond in GQDs were clearly identifiable. The structural and optical changes in GQDs and GQDs‐Fe3O4 NC samples induced by UV light were investigated by the absorption and emission spectroscopy over the deep UV–visible spectral range. The photoluminescence spectra have shown subband π→π ∗ transitions in GQDs‐Fe3O4 NC. Magnetic properties of the GQDs‐Fe3O4 NC samples have shown room temperature ferromagnetism induced by pure Fe3O4 nanoparticles and from the substantial spin polarized edges of GQD nanoparticles. It is concluded that the observed optical and magnetic properties could be further tailored in the studied nanocomposites for prospective medical applications.
DOI: 10.1155/2018/3254081
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,670
Funders: National Science Foundation, National Aeronautics and Space Administration, Center for Electrochemical Engineering Research, Ohio University, Western Kentucky University, Institute for Functional Nanomaterials, Division of Materials Research, Division of Chemical, Bioengineering, Environmental, and Transport Systems, Office of Experimental Program to Stimulate Competitive Research
Awards: MRI: Acquisition of Transmission Electron Microscope for Advanced Materials Relating to Energy Storage, Alternative Energy, Remediation, and Superconductors, G4177192743, ESTABLISHED IN 1994 BY THE RESOURCE CENTER FOR SCIENCE AND ENGINEERING (RCSE) OF THE UNIVERSITY OF PUERTO RICO (UPR) IN CONJUNCTION WITH THE NATIONAL, G5794402081, Nanotechnology from Basic Science to Emerging Applications: Institute for Functional Nanomaterials (IFN), THE OBJECTIVES OF PRSGC ARE TO: A) PROMOTE A STRONG SCIENCE, TECHNOLOGY, ENGINEERING, AND MATHEMATICS EDUCATION BASE FROM ELEMENTARY THROUGH SECONDAR, G6198347812, G6671297155, CAREER: Engineering of III-Nitride Quantum Heterostructures Doped with Lanthanides, G984442599
OpenAlex ID: W2797933038