Reduced graphene oxide enables stretchable strain sensor for monitoring of physical activities

A new work by scientists at India's National Institute of Technology Rourkela describes the fabrication of extremely flexible, accurate, and robust strain sensors employing electrochemically produced reduced graphene oxide (rGO).

Conventional silicon-based strain sensors have relatively low flexibility of less than 5% and inadequate responsiveness, making them unsuitable for detecting both small and large strains. Aside from the flexibility constraint, typical silicon-based strain sensors need sophisticated manufacturing procedures such as microelectromechanical and deposition of thin films. Flexibility, responsiveness, and endurance are critical characteristics of wearable devices because they aid in the integration of the sensors over non-uniform interfaces such as the human body. Aside from elasticity, these products also need a sensor capable of detecting minute deformations caused by physiological factors and physical activity.

Graphene assists in taking a step toward ultrafast computers

Researchers at the University of Rochester and the Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) have demonstrated a logic gate—the building block of computation and information processing—that operates at femtosecond timescales. The feat was accomplished by harnessing and controlling the real and virtual charge carriers that compose these ultrafast bursts of electricity.

The researchers have opened the door to information processing at the petahertz limit, where one quadrillion computational operations can be processed per second. That is almost a million times faster than today’s computers operating with gigahertz clock rates, where 1 petahertz is 1 million gigahertz.

Researchers develop a graphene platform for extra sensitive detection of viral proteins

Scientists at Swansea University, Biovici Ltd and the National Physical Laboratory have developed a graphene-based method to detect viruses in very small volumes.

Researchers develop graphene platform of biosensors imageGraphene device chip attached to an electrical connector, with two 5 μL HCVcAg samples (one applied on each graphene resistor). Image credit: Swansea U

The work followed a successful Innovate UK project developing graphene for use in biosensors – devices that can detect tiny levels of disease markers.

Researchers discover unique water-repellent graphene

Researchers at the Harvey Mudd College in the U.S have made an unexpected discovery that holds exciting potential for creating robust water-repellent coatings using gas-phase-synthesized graphene (GSG) and other nanomaterials.

Team discovers novel water-repellent graphene image

Last summer, the researchers were working on two projects: A National Science Foundation-funded project characterizing nanocomposites and a project supported by the College’s Rasmussen Summer Research fund that involved using graphene to separate oil from water. “While working on these projects, the students discovered that water droplets falling on our graphene powder were easily sliding off and bouncing from it,” says Albert Dato, author of the paper. “This was a completely unexpected result since we weren’t even looking into this phenomenon called superhydrophobicity.”

Researchers develop simple approach for creating quantum materials

University of Pennsylvania scientists have recently conducted a study that shows how patterned, periodic deformations of a single layer of graphene transforms it into a material with electronic properties previously seen in twisted graphene bilayers. This system also hosts additional unexpected and interesting conducting states at the boundary.

Through a better understanding of how unique properties occur when single sheets of graphene are subjected to periodic strain, this work has the potential to create quantum devices such as orbital magnets and superconductors in the future.