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Graphene oxide device assists in monitoring cancer treatments

Apr 28, 2016

Researchers at the University of Michigan developed a graphene oxide-based device that could provide a non-invasive way to monitor the progress of an advanced cancer treatment. The device is able to capture cancer cells out of a blood sample and let them go later, enabling further tests that can show whether the therapy is successfully eliminating the most dangerous cancer cells.

GO-based device helps cancer tests image

The scientists explain that cells released into the bloodstream by tumors could be used to monitor cancer treatment, but they are very difficult to capture, accounting for roughly one in a billion cells. In their quest to develop technologies for capturing such cells from blood samples, they researchers designed devices that trapped the cells on chips made with graphene oxide, but all analysis had to be done on the chip because the cells were firmly adhered. However, it was found important to study cells individually, and this new device makes this possible.

Graphene 3D Lab reports new reactor to expand its graphene production capability

Apr 19, 2016

Graphene 3D Labs logoGraphene 3D Lab has announced the commencement of a new production reactor that results in a 5-fold increase of production capabilities of Graphene Oxide and Reduced Graphene Oxide.

According to G3L, the necessity of expanding production volume for these materials is driven by increased demand as well as by the internal consumption of the Company's Industrial Materials division. G3L stated that it is committed to staying on track to satisfy the increasing materials demand. said

Garmor announces electrically conductive composite for use in energy storage and electronic applications

Apr 13, 2016

Garmor logoGarmor, a graphene technology provider and developer of advanced customer-driven applications, has developed graphene-based composites ideal for high-volume electronic and energy storage applications. By leveraging inexpensive manufacturing methods to produce few-layer graphene oxide (GO) along with innovative composite compression molding processes, Garmor produced compression-moldable GO-composites that can be shaped and stamped into almost any form factor. Garmor is currently establishing strategic business relationships to deploy this technological advancement in applications focused on energy production and storage.

These composites exhibit nearly isotropic electrical conductivity exceeding 1,000 S/cm delivering a unique, omnidirectional conductive substrate. Equally impressive is that these GO-enhanced materials include a polymeric resin that is inherently chemically resistant and allows for increased lifetime even in harsh operating environments.

Graphene oxide to enable microbots that strip lead from water

Apr 12, 2016

Researchers at the Max-Planck Institute for Intelligent Systems and Nanyang Technological University reported graphene oxide-based microbots (GOx-microbots) that can clean up toxic heavy metals in contaminated water. Tests showed around 95% of lead recovery within in an hour, and these findings may result in reducing the introduction of additional contaminants during water cleaning attempts, and salvaging lead for recycling.

GO microbots for cleaning water image

The scientists state that these microbots are more efficient than their predecessors and remove lead 10 times more efficiently than nonmotile GOx-microbots, cleaning water from 1000 ppb down to below 50 ppb in 60 min. The microbots are built on nanosized multilayers of graphene oxide, nickel, and platinum. Researchers say the bots' graphene oxide outer coat captures suspended lead, the inner platinum layer decomposes hydrogen peroxide for self-propulsion, and the middle nickle band allows the machines to be magnetically retrieved from the water. In addition, the autonomous machines can be reused as soon as lead is chemically separated.

Graphene oxide nanoscrolls to benefit water treatment techniques

Apr 12, 2016

Researchers at MIT and Harvard University fabricated nanoscrolls made from graphene oxide flakes for water purification applications, at a much lower cost than that of graphene membranes. The team was able to control the dimensions of each nanoscroll, using both low- and high-frequency ultrasonic techniques.

Graphene oxide nanoscrolls for water treatment image

The researchers say that these nanoscrolls could also be used as ultralight chemical sensors, drug delivery vehicles, and hydrogen storage platforms, in addition to water filters. Also, the ability to tune the dimensions of these architectures may open a window to industry, in combination with the more affordable production costs.

A graphene-based catalyst to improve the production of key chemical

Apr 11, 2016

A team of researchers at Brown University developed a composite catalyst using nitrogen-rich graphene dotted with copper nanoparticles. It was shown in a study that the new catalyst is able to efficiently and selectively convert carbon dioxide to ethylene, one of the world's most important commodity chemicals that is used to make plastics, construction materials and other products.

Chemical companies produce ethylene by the millions of tons each year using processes that usually involve fossil fuels. If excess carbon dioxide can indeed be used to make ethylene, like the results of this study imply, it could help make the chemical industry become more sustainable and eco-friendly. There is, however, much more work to be done before bringing such a process to an industrial scale.

Water-removal technique could help develop next-gen carbon nanomaterials for fuel cells and batteries

Mar 27, 2016

A research team at Los Alamos, along with collaborators from Oak Ridge National Laboratory, the University of New Mexico, and Rutgers University, has developed a new water-removal technique that improves the performance of carbon nanomaterials used in fuel cells and batteries. The study may present new avenues for designing advanced carbon nanomaterials for batteries and fuel cells.

The study gives an in-depth understanding of the role water plays in graphene oxide nanosheets or functionalized graphene sheets. Dry films of graphene oxide include a significant volume of added water that builds up between the oxygen-functionalized nanosheets and is also usually produced in aqueous solutions. The researchers showed how a simple solvent drying method can remove the accumulated water between the graphitic sheets. When water is removed, the physical structure of these graphene oxide nanosheets changes considerably, and the distance between the nanosheets is also reduced. In addition to this, the researchers also noted that the concentration of functional groups changed significantly, resulting in highly ordered structures. These changes ultimately led to improved electrocatalytic activity, which substantially improves the performance in batteries and fuel cells.