When you hear energy storage and graphene mentioned in the same sentence this usually refers to electrical energy. Let’s take a brief look at some of the research that has been coming out of the labs recently…
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Researchers at the U.S. Department of Energy’s Ames Laboratory are working towards mastering graphene’s assembly in combination with other materials—a tricky, delicate process performed in ultra-high vacuum environments at the atomic scale.
This week, they published a paper where they reveal that they have conquered a new milestone in their quest. They discovered a process to sheathe metal under a single layer of graphite which, according to them, may lead to new and better-controlled properties for these types of materials.
Toxicity evaluation for the proper use of graphene oxide (GO) in biomedical applications involving intravenous injections is crucial, but the GO circulation time and blood interactions are largely unknown. It is thought that GO may cause physical disruption (hemolysis) of red blood cells. The aim of this work is to characterize the interaction of GO with model and cell membranes and use this knowledge to improve GO hemocompatibility.
Scientists in China have developed an artificial sponge that can separate oil and water and can be used for treating water contaminated by industrial sewage, a media report said today. The porous material is made with nano-crystalline cellulose and graphene composite and has high absorption capacity.
Atomically thin graphene exhibits fascinating mechanical properties, although its hardness and transverse stiffness are inferior to those of diamond. So far, there has been no practical demonstration of the transformation of multilayer graphene into diamond-like ultrahard structures.
A study conducted at the University of São Paulo’s Physics Institute (IF-USP), Brazil, has resolved a longstanding controversy dogging the international community of researchers dedicated to investigating defects in graphene. The controversy is related to the calculation of the overall electronic structure of defects. This configuration, which comprises many variables, was described in different ways depending on the researcher and the model used. The solution, which is identical for all models and compatible with experimental findings, was obtained by Chilean Ana María Valencia García and her PhD supervisor, Marília Junqueira Caldas, Full Professor at IF-USP.
Graphene-oxide membranes have attracted considerable attention as promising candidates for new filtration technologies. Now the much sought-after development of making membranes capable of sieving common salts has been achieved.
Swinburne researchers have received 3.45 million AUD (around $2.64 USD) in funding to continue work on a project investigating energy storage alternatives using graphene oxide. Swinburne will receive the grant as part of the Cooperative Research Centres Projects (CRC-P) funds commissioned by the Australian Government. The Swinburne Centre for Micro-Photonics is collaborating with Flinders University as well as First Graphene and Kremford.
The observation of large nonlocal resistances near the Dirac point in graphene has been related to a variety of intrinsic Hall effects, where the spin or valley degrees of freedom are controlled by symmetry breaking mechanisms. Engineering strong spin or valley Hall signals on scalable graphene devices could stimulate further practical developments of spin- and valleytronics.
Lithium ion batteries, as the name implies, work by shuffling lithium atoms between a battery’s two electrodes. So, increasing a battery’s capacity is largely about finding ways to put more lithium into those electrodes. These efforts, however, have run into significant problems. If lithium is a large fraction of your electrode material, then moving it out can cause the electrode to shrink. Moving it back in can lead to lithium deposits in the wrong places, shorting out the battery.