Graphene sensors: introduction and market status - Page 14

Cardea Bio, a biotech company integrating molecular biology with semiconductor electronics, has signed a commercial partnership with Scentian Bio. Scentian is an expert in synthetic insect odorant receptors (iORs), one of nature’s ways of detecting and interpreting smells.

The partnership will enable Scentian to use a customized Cardean chipset, built with graphene-based biology-gated transistors, which will allow Scentian to manufacture a bio-electronic tongue/nose tech platform.

An international research team, led by the University of Cologne, has succeeded in connecting several atomically precise graphene nanoribbons to form complex structures. The scientists have synthesized and spectroscopically characterized nanoribbon heterojunctions, and were able to integrate the heterojunctions into an electronic component. In this way, they have created a novel sensor that is highly sensitive to atoms and molecules.

"The graphene nanoribbon heterojunctions used to make the sensor are each seven and fourteen carbon atoms wide and about 50 nanometres long. What makes them special is that their edges are free of defects. This is why they are called "atomically precise" nanoribbons," explained Dr. Boris Senkovskiy from the Institute for Experimental Physics. The researchers connected several of these nanoribbon heterojunctions at their short ends, thus creating more complex heterostructures that act as tunneling barriers.

Qurv Technologies, a Spain-based startup established in 2020 to develop wide-spectrum image sensors based on graphene and quantum-dot technologies, has developed a sensor that combines the unique electronic properties of graphene with suitable quantum nanoparticles as light sensitizers. The new device reportedly enables efficient detection of a broad range of wavelengths from ultraviolet to infrared light all concentrated into one simple device.

The production and transfer process of graphene leverages existing scalable Complementary Metal Oxide Semiconductor (CMOS) manufacturing processes. Furthermore, this graphene-based sensor could replace traditional costly alternatives based on indium gallium arsenide, paving the way to SWIR imagers up to 1000 times cheaper.

Researchers at the University of Michigan (U-M) have developed a real-time, 3D motion tracking system developed that combines transparent light detectors with advanced neural network methods. The system could one day replace LiDAR and cameras in autonomous technologies and future applications include automated manufacturing, biomedical imaging and autonomous driving.

The imaging system relies on transparent, highly sensitive graphene photodetectors developed by Zhaohui Zhong, U-M associate professor of electrical and computer engineering, and his group. They’re believed to be the first of their kind.

UK-based developer of graphene-based biological sensors, HexagonFab, recently raised £1.9 million to accelerate development of its novel technology for process monitoring in the biopharmaceutical industry.

The company has developed a portable and affordable instrument HexagonFab Bolt which can very rapidly generate biopharma data.

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In November 2020, Archer Materials announced its plan to develop a graphene-based lab-on-chip device. Now, the Company provided an update on the progress it has achieved - it demonstrated that it can fabricate nanosize biosensor components of 100-150 nanometer features on silicon wafers.

In the past, prior to Archer utilizing local semiconductor foundry fabrication techniques, it was limited to one sensor per ~1 cm^2. Now, with its in-house capability, it has miniaturized key biosensor components to chip-formats on silicon by nanofabrication translating to approx. over 1 million sensor components within a 1 cm² area.

An international collaboration of researchers from Penn State and the University of Electronic Science and Technology of China has resulted in a novel material for supercapacitors' electrodes.

The supercapacitor is a very powerful, energy-dense device with a fast-charging rate, in contrast to the typical battery — but can we make it more powerful, faster and with a really high retention cycle? asked Jia Zhu, corresponding author and doctoral student conducting research in the laboratory of Huanyu Larry Cheng, Dorothy Quiggle Career Development Professor in Penn State's Department of Engineering Science and Mechanics.

UK-based Paragraf has announced a new graphene Hall Effect sensor, said to be ideally suited to battery applications, such as the electric vehicle (EV) sector.

The graphene GHS01AT Hall Effect sensor is optimized for use in relatively low field environments and normal ambient temperatures. Bringing the magnetic field measurement resolution towards that of more complex magnetic sensors, yet with the small size and ease of use of a Hall sensor, it can address monitoring tasks that conventional technologies simply cannot provide an effective solution for.

GLC Medical (GLCM), a subsidiary of Graphene Leaders Canada (GLC), recently announced completion of development of the GLCM SARS-CoV-2 Insta-Test, delivering results in under 15 seconds, offering fast and easy to use solution to screen for COVID-19.

The Company stated that it sees potential for this new graphene-based biosensor to enable the world to regain a sense of freedom and bring normal back into its future.