UCF team enables graphene to better absorb light

Researchers at The University of Central Florida have come up with a finding that enables graphene to better absorb light and showed more than 45% absorption of light in a single layer of graphene. This may open the door to graphene-enhanced applications that require the incident light to be fully utilized, like next-generation light detectors, touchscreens, and more.

“This is the first published work on extremely high light absorption in graphene which is tunable dynamically,” the researchers said. “Theoretical studies show further design optimization can lead to further enhanced absorption close to 90%”.

University of Sussex team develops a graphene-based sensor with lifesaving potential

Researchers at the University of Sussex have developed a graphene-based sensor with the potential to prevent sudden infant death syndrome (SIDS) cases. The sensor is shaped like a flexible rubber tube filled with a solution of water, oil and particles graphene.

University of Sussex's graphene sensor for health monitoring image

the sensors were said to be the most sensitive liquid-based devices to have ever been developed. Utilizing graphene's conductivity, the solution inside the tube conducts electricity. When the tube is stretched by even a tiny amount, the conductivity also changes and this change can be detected, indicating that movement (such as the rising and falling of a breathing person's chest) is occurring.

First Graphene reports on the progress of its graphene-enhanced cement project

First Graphene logo imageFirst Graphene has provided an update on its work with the University of Adelaide (UoA) on graphene for enhancement of industrial building products. The UoA is testing FGR graphene, with the aim of making “smart cement” with conductive graphene flakes with aims to address the concerns of cracking and corrosion and provide conductivity for better monitoring of the health of concrete structures.

According to FGR, the first test results indicate the addition of 0.03% standard graphene is the optimal quantity of graphene from the test conducted to date, showing a 22 - 23 % increase in compressive and tensile strength, respectively. The addition of more standard graphene does not reportedly increase or decrease the strength of the concrete material when compared to the control in this test work.

Graphene to potentially replace platinum for cheaper fuel cells

Researchers from Rice University have discovered that nitrogen-doped carbon nanotubes or modified graphene nanoribbons could potentially replace platinum, one of the most expensive facets in fuel cells, for performing fast oxygen reduction—a crucial reaction that transforms chemical energy into electricity.

Graphene to replace platinum in fuel cells image

The researchers used computer simulations to see how carbon nanomaterials can be improved for fuel-cell cathodes and discovered the atom-level mechanisms by which doped nanomaterials catalyze oxygen reduction reactions. The simulations also revealed why graphene nanoribbons and carbon nanotubes modified with nitrogen and/or boron are so sluggish and how they can be improved.

New low-cost graphene-based sensors for plants to enable new opportunities

Iowa State University researchers have created a new, low-cost, easily produced, graphene-based sensors-on-tape that can be attached to plants to provide data that was previously very hard to collect. This can help farmers to breed plants that are more efficient in using water, for example, but also open new possibilities for creating new sensors for biomedical diagnostics, for checking the structural integrity of buildings, monitoring the environment and, after appropriate modifications, for testing crops for diseases or pesticides.

''Tattoo'' sensors for plants image

The tiny graphene sensors that can be taped to plants, and the researchers have dubbed it a “plant tattoo sensor”. The plant sensors have been successfully tested in lab and pilot field experiments. The graphene-on-tape technology in this study has also been used to produce wearable strain and pressure sensors, including sensors built into a “smart glove” that measures hand movements.

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