Graphene News - Page 1

Researchers from CNR-Istituto Nanoscienze, Italy and the University of Cambridge, UK, associated with the ​Graphene Flagship, have shown that it is possible to create a terahertz saturable absorber using graphene, produced by liquid phase exfoliation and deposited by transfer coating and ink jet printing. The paper reports a terahertz saturable absorber with an order of magnitude higher absorption modulation than other devices produced to date.

A terahertz saturable absorber decreases its absorption of light in the terahertz range (far infrared) with increasing light intensity and has great potential for the development of terahertz lasers, with applications in spectroscopy and imaging. These high-modulation, mode-locked lasers open up many prospects in applications where short time scale excitation of specific transitions are important, such as time-resolved spectroscopy of gasses and molecules, quantum information or ultra-high speed communication.

Australia-based technology minerals company, Talga Resources, is actively developing graphene materials and graphene-based applications across many areas, including coatings, batteries, construction materials, composites and more.

Mark Thompson, Talga's managing director, was kind enough to update us on Talga's graphene program and answer a few questions we had.

Q: Thank you for this interview, Mark. Can you quickly update us on your graphite mine operation in Sweden?

Talga has over 20 years of graphite mining potential outlined in economic studies to date and currently extracts intermittently what it needs for scale up and testing purposes. Talga mined approximately 5,000 tonnes of graphite ore during 2015-16 trial mining operations. Further extraction is not required for now but permitting for the future larger scale operations is underway.

In June 2017 Group NanoXplore, a Montreal-based company specializing in the production and application of graphene and its derivative materials, announced that it will merge with Graniz Modal, a public company that trades in the Canadian stock exchange (TSX: GRA.H) - to become a public company.

NanoXplore has now completed the deal, and is now trading in the TSX Venture under the ticker CVE:GRA. NanoXplore has a market capitalization of $36.3 million CAD, and Mason Graphite now holds 25% of the company. As part of the reverse merger, NanoXplore raised $9.7 million CAD.

Ionic Industries recently announced a process for economically mass-producing graphene micro supercapacitors and added that its directors and key personnel have taken direct stakes in the company.

Ionic stated that since it published the positive results on its graphene micro planar supercapacitors 2 years before, the company has been working toward developing a device that not only demonstrates similar performance but can be produced at scale to deliver an economically viable device.

Dotz Nano has announced the successful development of a process to tag fuel derivatives with graphene quantum dots (GQDs). The technology allows GQDs to be optimally added to fuel derivatives via a patent pending method so that the GQDs cannot be easily "laundered" or "washed out" from the fuel.

The new fuel application has been said to successfully withstand various testing procedures used in international bids for fuel taggants. This was achieved by working closely with two international anti-counterfeiting/brand protection companies. Dotz Nano has also submitted a patent application on the specific tagging of fuels with GQDs.

Imagine Intelligent Materials and Swinburne University have announced a collaborative six-month project aiming to develop graphene-reinforced smart composites. The composite will be able to report on the condition of large structures, and will have major commercial potential in the transport sector, including automotive and aerospace.

The project is supported by a $20,000 Seed grant from the university under a program, targeting “interdisciplinary projects that are aligned with the Swinburne research institutes’ external partnership and collaboration objectives”. It will combine expertise from experts in sensors, electronics engineering and aerospace manufacturing at the university.

Haydale recently announced that it has agreed heads of terms for a technical and commercial collaboration with Rogers Advanced Composites ("RAC”). RAC is developing a composites center in the UK, and this collaboration will aim to enable RAC to access Haydale’s extensive technical know-how in composites, polymers and resins and to incorporate the range of advanced graphene enhanced composites, developed by Haydale, into its existing and future projects.

RAC, which has roots in the marine and yachting world through its sister company Rogers Yacht Design, has built a strong reputation in the design and manufacture of advanced composite products. It is Haydale’s understanding that RAC is experiencing a strong demand for high quality composite solutions across a range of industrial sectors including marine, military and motor sport and that RAC is in the process of securing long term production contracts for an oil recovery project as well as several aerospace, military and motor racing projects.