Graphene Oxide: Introduction and Market News - Page 37

Archer Exploration, in collaboration with the University of Adelaide, has produced a wide number of graphene and intercalated graphite products from raw graphite, and from Campoona (Australia) medium-grade graphite concentrates.

Archer announced that University researchers managed to produce graphene oxide sheets, nanosheets, membranes, powders, films, and electrodes. Archers aims to produce high grade to ultra-pure natural flake graphite and manufacture high tech, high-value graphene products.

Reduced graphene oxide is a promising way to produce graphene materials, but currently used methods use harsh chemicals and are not environmentally friendly. A possible green method is photoreduction, but the dynamics behind this reduction aren't fully understood.

Now researchers from Germany's Max Planck Institute demonstrate and measure the ultrafast (picosecond) ultimate and fundamental time scale of graphene oxide photoreduction. The researchers explain that their research demonstrates the nature and fundamental timescale of GO reduction in water by UV irradiation.

Researchers from Korea's Gwangju Institute of Science and Technology in Korea developed high-performance supercapacitors based on graphene. They say these capacitors can store almost as much energy as a Li-Ion battery and can charge/discharge in seconds. They also last for many tens of thousands of charging cycles.

The researchers use a highly porous graphene that has a huge internal surface area. To fabricate this material they reduced graphene oxide with hydrazine in water agitated with ultrasound. This results in a graphene powder that they then packed into a cell shaped like a cell and dried it at 140 degrees Celsius under pressure for five hour. The material was used as an electrode.

Researchers from Korea's Incheon National University developed a new way to make conductive, flexible, and durable textiles (fabrics) wrapped with reduced graphene oxide (RGO). They report that those materials are useful to make conductive wires or functional fabrics in wearable electronics and more.

The main breakthrough is the choice of bovine serum albumin (BSA) - an amphiphilic protein that can be attached to organic and inorganic materials through hydrophobic and hydrophilic interactions - basically this is molecular "glue" that helps with graphene-oxide adsorption into any textile. The researchers fabricated those electrostatic self-assembly of BSA molecules onto all sorts of textiles (nylon yarns, cotton yarns, etc.) and then used a low-temperature chemical reduction.

Researchers from Korea's Ulsan institute developed a high performance Oxygen Reduction Reaction (ORR) electrocatalyst using chemical functionalized (doped) graphene oxide. ORR electrocatalysts, which split hydrogen gas to make electricity are critical components in fuel cells and some batteries.

The researchers used covalent functionalization of various small organic molecules with a subsequent thermal treatment, which resulted in thin films. The researchers say they achieved a simple approach to introduce nitrogen atoms on graphene oxide sheets, without a toxic gas precursor and with a good doping degree control.

Researchers from Korea's Hanyang University developed new graphene membrane based technology to separate carbon dioxide (CO₂) from nitrogen and hydrogen. This could lead to low-cost greenhouse-gas control systems, and the researchers hope it can be commercialized within two or three years.

The researchers used graphene and graphene oxide based membranes. To create the membranes, the researchers created pores in graphene sheets and then stacked them in such a way that ensured that only CO₂ molecules could go through.

Researchers from India's VIT University combined studied a new hybrid material made from PVC and graphene-oxide (GO). They say that the GO enhances the properties of PVC and makes it useful as battery electrode material, and also for membranes and coating applications.

The researchers combined polyvinyl chloride (PVC) with graphene oxide using the colloidal blending method. The new composites were studied using several methods (including AFM, SEM, TEM and more) and it was found that the GO have been dispersed homogeneously throughout the PVC matrix, and the original research paper includes many measurements and analysis data.

Researchers from Swinburne University of Technology developed a way to record holographic coding in a graphene oxide polymer composite. This may lead to very safe and secure discs that can retain the holographic information even when broke.

The researchers used an ultrashort laser beam on the graphene oxide polymer, which created a 10 to 100 times increase in the refractive-index (the measure of the bending of light as it passes through a medium) of the graphene oxide along with a decrease in its fluorescence. This offers a new mechanism for multimode optical recording.

Thermene launched a new product based on graphene - the Thermene Graphene Thermal Paste is based on graphene-oxide flakes and is aimed towards CPU cooling. The company just started selling this new product a few days ago. For $20 you can buy 3 ml of Thermene which should be enough for about a dozen CPUs.

Thermene is easy to use - it comes with a simple paint brush and you simply apply it to your CPU surface. The material takes 10 hours to cure.

Researchers from the University of Michigan developed a new microfluidic chip based on Graphene Oxide that can capture tumor cells from blood and support their growth for further analysis. This device could be used for both cancer diagnosis and find the best test-treatment options, without biopsies. The researchers estimate that such chips could reach clinics within 3 years.

Circulating tumor cells may be crucial for new early cancer diagnosis technologies. The researchers call this "liquid biopsy". This diagnosis may also help researchers understand the basic biologic mechanisms by which cancer cells metastasize or spread to distant organs, which is the major cause of death in cancer patients.