Abstrait

Nano 2020: Effectiveness in the absorption of X-rays by composite materials doped with graphene - Fernando Gimeno-Bellver - University Center of Defence

Fernando Gimeno-Bellver

In the University Center of Defense in San Javier, composite sheets based on carbon fiber and epoxy matrix have been prepared, with some of them doped with graphene oxide or with 0.1% graphite from Sigma-Aldritch and manufatured by us.

These sheets were then irradiated with X-rays in the radiodiagnosis service of the Mesa del Castillo Hospital, Murcia, Spain. Radiation absorption measures via image analysis were performed and it has been shown that graphene-doped sheets absorb an important part of the X-ray intensity over a wide range of energy. These experiments were repeated over various ranges of frequency and energy with similar results

The surface properties of the cathode materials assume an essential job in deciding the exhibition and effectiveness of vitality stockpiling gadgets. Graphene oxide and nanostructures of 3d change metal oxides were incorporated for development of cathodes in supercapacitors, and the electronic structure and oxidation states were tested utilizing close edge X-beam ingestion fine structure. Understanding the science of graphene oxide would give important knowledge into its reactivity and properties as the graphene oxide change to decreased graphene oxide is a key advance in the blend of the anode materials. Spellbound conduct of the synchrotron X-beams and the precise reliance of the close edge X-beam assimilation fine structures (NEXAFS) have been used to contemplate the direction of the σ and π obligations of the graphene oxide and graphene oxide–metal oxide nanocomposites. The center level advances of individual metal oxides and that of the graphene oxide nanocomposite indicated that the collaboration of graphene oxide with the metal oxide nanostructures has not adjusted the electronic structure of both of them. As the rebuilding of the π organize is significant for acceptable electrical conductivity, the C K edge NEXAFS spectra of diminished graphene oxide nanocomposites affirms the equivalent through expanded force of the sp2-determined abandoned states π* band. An articulated precise reliance of the diminished example and the arrangement of excitonic tops affirmed the development of expanded conjugated system.