Graphene applications: what is graphene used for? - Page 17

Researchers from Helmholtz-Zentrum Dresden-Rossendorf, Universität Duisburg-Essen, CENTERA Laboratories, Indian Institute of Technology, University of Maryland and the U.S. Naval Research Laboratory have used graphene disks to demonstrate light-induced transient magnetic fields from a plasmonic circular current with extremely high efficiency. 

The effective magnetic field at the plasmon resonance frequency of the graphene disks (3.5 THz) is evidenced by a strong ( ~ 1°) ultrafast Faraday rotation ( ~ 20 ps). In accordance with reference measurements and simulations, the team estimated the strength of the induced magnetic field to be on the order of 0.7 T under a moderate pump fluence of about 440 nJ cm⁻².

Nanografi has developed and produced a novel form of graphene it calls as Holey Super Graphene, a material set to redefine the landscape of high-tech innovations. This advanced material, notable for its distinctive perforated design, offers opportunities for various industries by solving some of their most intricate challenges.

Often referred to as holey graphene (hG) in the academic community, Holey Super Graphene has been perfected to meet the requirements of high-tech sectors, promising to hasten advancements and propel progress. Nanografi’s initial distribution in October 2023 marked the beginning of its integration into broader market applications, highlighting the role of such innovations in fostering global collaborations and partnerships in technology.

Definition

Holey Super Graphene, characterized by its unique graphene structure featuring holes and pores, combines the inherent properties of graphene with additional capabilities. In addition to graphene's well-known attributes, it has exceptional qualities, including ultra-high conductivity, an extensive surface area, and improved electrochemical performance.

Researchers at the National University of Singapore (NUS), University of Science and Technology of China and the National Institute for Materials Science in Japan have developed a way to induce and directly quantify spin splitting in two-dimensional materials.

Using this concept, they have experimentally achieved large tunability and a high degree of spin-polarization in graphene. This research achievement can potentially advance the field of two-dimensional (2D) spintronics, with applications for low-power electronics.

TeamGroup has announced that its portfolio of high-speed solid state drives (SSDs) is expanding, with the launch of four new models, including the T-Force G70 Pro, T-Force G70, T-Force G50 Pro, and T-Force G50. 

TEAMGROUP’s new T-Force G70, G70 Pro, G50 and G50 Pro are the company’s latest SSDs available in the M.2 2280 format. Each of these SSDs comes fitted with patented ultra-thin graphene heatsinks, however the G70 Pro is also available with an aluminium alloy heatsink that also fits within the PS5 SSD expansion slot.

Researchers from Peking University, Beijing Normal University and KU Leuven recently reported a novel method to substantially reinforce large-area graphene membranes. Their work provides a facile method to fabricate large-area graphene membranes and paves the road to practical application in the membrane separation field. 

Nanoporous graphene membranes are attractive for molecular separations, but it remains challenging to maintain sufficient mechanical strength during scalable fabrication and module development. In this work, the team drew inspiration from the composite structure of cell membranes and cell walls, and designed a large-area atomically thin nanoporous graphene membrane supported by a fiber-reinforced structure with strong interlamellar adhesion. It was found that factors like fracture stress, fracture strength, and tensile stiffness of the composite membranes can be enhanced compared with other graphene-based membranes of large scale.

Rumors suggest that the iPhone 16 may use a graphene heat sink and a metal battery case to promote better heat transfer.

This follows complaints by iPhone 15 users about overheating, which Apple fixed via software, but the iPhone 16 is rumored to have a hardware solution, too. Apple associated the overheating with poorly optimized software and issued a software fix, but more effective cooling may also help.

An international team of researchers, including scientists from University of California San Diego, Chinese Academy of Sciences, University of Texas Medical Branch and University of Illinois Urbana-Champaign, has developed a handheld, non-invasive graphene-based device that can detect biomarkers for Alzheimer’s and Parkinson’s Diseases. The biosensor can also transmit the results wirelessly to a laptop or smartphone.

The biosensor consists of a chip with a highly sensitive transistor, made of a graphene layer that is a single atom thick and three electrodes–source and drain electrodes, connected to the positive and negative poles of a battery, to flow electric current, and a gate electrode to control the amount of current flow. Image credit: UCSD

The team tested the device on in vitro samples from patients. The tests reportedly showed the device is as accurate as other state-of-the-art devices. Ultimately, researchers plan to test saliva and urine samples with the biosensor. The device could be modified to detect biomarkers for other conditions as well.

Researchers from the University of Hyderabad (UoH) and the Tata Institute of Fundamental Research (TIFR) have developed electrode materials made of Tin antimony alloy based reduced graphene oxide composite which has the potential to enhance energy storage for sodium-ion batteries.

Sodium-ion batteries could offer enhanced energy efficiency, rapid charging capabilities, resilience to extreme temperatures, and safeguards against overheating or thermal runaway incidents. They exhibit reduced toxicity due to their lack of reliance on lithium, cobalt, copper, or nickel, which have the potential to emit environmentally harmful gases in the event of fire, according to a recent official release.

Versarien has announced the launch of a portfolio of graphene and related nanomaterial-based thermoplastic polymer compounds, branded under the name Polygrene. The Company says that the Polygrene line is the culmination of extensive collaborative efforts with the International Institute for Nanocomposites Manufacturing (IINM) at WMG, University of Warwick.

The new range has potential applications across a variety of industries, including sports equipment, construction products, aerospace and automotive components. This versatility showcases the adaptability and strength of the new graphene-infused materials.

Archer Materials, a semiconductor company advancing the quantum computing and medical diagnostics industries, has demonstrated multiplexing readout for its advanced Biochip graphene field effect transistor (“gFET”) device.

Archer confirmed single-device multiplexing using four advanced gFETs as sensors, which were integrated into the Archer advanced Biochip platform. This is significant as Archer intends to apply its multiplexing capability in the Biochip to test for multiple diseases on a single chip at once.