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Graphene Oxide (GO) was prepared and dispersed in DER 332 epoxy. Preliminary work using Broadband Dielectric Spectroscopy (BDS) has shown that the epoxy and its composite could start to degrade at temperature as low as 120°C. Thermogravimetric analysis measurement indicated a slight mass loss difference at 150°C between samples with and without GO. Both samples as produced were initially post-treated...
In the recent years, graphene studies have increased rapidly. Graphene oxide (GO), which is an intermediate product to form graphene, is insulating and it should be thermally reduced to be electrically conductive. In this work, we have described an attempt to change the insulating properties of GO by changing their pH. GO powder has been synthesized and modified to maintain pH=3 by wash process. Microstructure...
We carried out a theoretical and computation study of optical response of graphene over a wide frequency range, from terahertz to ultraviolet. It is shown that due to the massless Dirac Fermion properties, the optical response of graphene is electrically switchable.
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