%0 Journal Article 
%A Sainz Urruela, Carlos
%A Vera López, María Soledad
%A San Andrés Lledó, María Paz
%A Díez Pascual, Ana María
%T Graphene Oxides Derivatives Prepared by an Electrochemical Approach: Correlation between Structure and Properties
%D 2020
%@ 2079-4991
%U http://hdl.handle.net/10017/49671
%X Graphene oxide (GO) can be defined as a single monolayer of graphite with oxygen-containing functionalities such as epoxides, alcohols, and carboxylic
acids. It is an interesting alternative to graphene for many applications due
to its exceptional properties and feasibility of functionalization. In this
study, electrochemically exfoliated graphene oxides (EGOs) with different
amounts of surface groups, hence level of oxidation, were prepared by an
electrochemical two-stage approach using graphite as raw material. A complete
characterization of the EGOs was carried out in order to correlate their
surface topography, interlayer spacing, defect content, and specific surface
area (SSA) with their electrical, thermal, and mechanical properties. It has
been found that the SSA has a direct relationship with the d-spacing. The EGOs
electrical resistance decreases with increasing SSA while rises with increasing
the D/G band intensity ratio in the Raman spectra, hence the defect content.
Their thermal stability under both nitrogen and dry air atmospheres depends on
both their oxidation level and defect content. Their macroscopic mechanical
properties, namely the Young's modulus and tensile strength, are influenced by
the defect content, while no correlation was found with their SSA or interlayer
spacing. Young moduli values as high as 54 GPa have been measured, which
corroborates that the developed method preserves the integrity of the graphene
flakes. Understanding the structure-property relationships in these materials
is useful for the design of modified GOs with controllable morphologies and
properties for a wide range of applications in electrical/electronic devices.
%K Óxido de grafeno
%K Relación estructura-propiedad
%K Topografía de la superficie
%K Espaciado entre capas
%K Estabilidad térmica
%K Propiedades mecánicas
%K Chemistry
%K Química
%~ Biblioteca Universidad de Alcala