Korean scientists develop graphene electrode to enable next-gen perovskite solar cells

Several research institutions in South Korea are actively conducting research and development on next-generation solar cells, heightening expectations for commercialization. The research team led by Prof. Yoon Soon-gil of Chungnam National University has developed a new graphene electrode to produce perovskite solar cells at a low temperature. In addition, the team led by Prof. Choi Kyoung-jin of the School of Materials Science and Engineering at UNIST has developed a new concept tandem solar cell using transparent conductive adhesives (TCA).

The graphene electrode developed by Professor Yoon’s team can help create a perovskite solar cell at a low temperature and can raise both safety and economic efficiency.

An interview with MITO Material Solutions' CEO, Haley Marie Keith

MITO Materials Solutions logo imageMITO Material Solutions, a U.S-based nano-additive solutions provider, recently received $1.1 million for product development funding from the National Science Foundation Small Business Innovation Research grant program (SBIR) and the State of Oklahoma through the Oklahoma Center for Advanced Science and Technology (OCAST) program.

MITO aims to use these funds to continue with their push to manufacture hybrid nanoadditives that enable composite manufacturers to create lighter, tougher, and more durable products for the automotive, wind energy, aerospace, and transportation industries. MITO's CEO, Haley Marie Keith, was kind enough to chat with us and answer our questions.

Imagine Intelligent Materials develops sensing solution for large surface areas

Australia-based graphene and data analytics company, Imagine Intelligent Materials, has developed an integrated sensing solution that uses graphene coatings and edge-based signal processing devices to collect data from objects with large surface areas.

World first sensing solution for large surface areas by Imagine IM image

Proven over areas as large as 4,000 square meters, the system gathers data such as pressure, moisture, stress and temperature and is aimed at industrial and consumer applications in the IoT market.

Researchers achieve atomically-precise graphene origami

Past studies by various research groups around the world were able to demonstrate origami-like folding of graphite with a scanning probe, but could not command where or how the folds would occur. Now, by replacing the graphite with high-quality graphene nanoislands, researchers in China and the US have leveraged the atomic-level control of STM into an origami nanofabrication tool with an impressive level of precision.

Pristine graphene precisely folded image

“Similar to conventional paper origami, our current work has made it possible to create new complex nanostructures by custom-design folding of atomic layer materials,” says Hong-Jun Gao, a researcher at the Chinese Academy of Sciences (CAS) who led this latest work. Alongside Shixuan Du and collaborators at CAS, as well as Vanderbilt University and the University of Maryland in the U.S, Gao reports how they can fold single layers of graphene with the direction of the fold specified over a range from around the magic angle at 1.1° (where observations of correlated electron behavior have been causing such a stir) to 60°, with a precision of 0.1°. Their STM manipulations also leave tubular structures at the edges that have one-dimensional structure electron characteristics similar to carbon nanotubes.

Researchers gain a better understanding of heat distribution processes

Understanding atomic level processes can open a wide range of prospects in nanoelectronics and material engineering. A team of scientists from Peter the Great St. Petersburg Polytechnic University (SPbPU) recently suggested such a model, that describes the distribution of heat in ultrapure crystals at the atomic level.

The distribution of heat in nanostructures is not regulated by the laws that apply to conventional materials. This effect is most vividly expressed in the reaction between graphene and a laser-generated heat point source.

Graphene to enable super-resolution microscopy

Researchers at the University of Göttingen have developed a new method that utilizes the unusual properties of graphene to electromagnetically interact with fluorescing (light-emitting) molecules. This method allows scientists to optically measure extremely small distances, in the order of 1 ångström (one ten-billionth of a meter) with high accuracy and reproducibility for the first time. This enabled researchers to optically measure the thickness of lipid bilayers, the stuff that makes the membranes of all living cells.

Single molecules successfully demostrated imageOn the left: Image of single molecules on the graphene sheet. Such images allow scientists to determine the position and orientation for each molecule. Comparison with the expected image (right) shows excellent agreement. Credit: University of Göttingen

The University of Göttingen team, led by Professor Enderlein, used a single sheet of graphene, just one atom thick (0.34 nm), to modulate the emission of light-emitting (fluorescent) molecules when they came close to the graphene sheet. The excellent optical transparency of graphene and its capability to modulate through space the molecules' emission made it an extremely sensitive tool for measuring the distance of single molecules from the graphene sheet. The accuracy of this method is so good that even the slightest distance changes of around 1 ångström (this is about the diameter of an atom or half a millionth of a human hair) can be resolved. The scientists were able to show this by depositing single molecules above a graphene layer. They could then determine their distance by monitoring and evaluating their light emission.

Talga to scale-up operations following positive battery anode product test results

Talga Resources logo 2017Talga Technologies is scaling up its R&D operations at the Bradfield Center on Cambridge Science Park. The reported that this move comes as tests showed that Talga’s Li-ion battery anode product, Talnode-C, outperforms existing lithium battery technology in cold weather situations, where lithium products have traditionally struggled.

“We make graphene and graphite materials,” says Talga Resources R&D manager, Sai Shivareddy. “Graphene is made by an electrochemical exfoliation process in an aqueous electrolyte – water plus salt – by using our natural graphite rocks in electrodes.”

Versarien - Think you know graphene? Think again! Versarien - Think you know graphene? Think again!