Graphene-enhanced film shuts down li-ion batteries before overheating and restarts upon cooling

Researchers at Stanford University have developed a revolutionary graphene-enhanced polyethylene film that prevents a lithium-ion battery from overheating, then restarts the battery when it cools. This new technology could prevent fires and melt-downs in a wide range of battery-powered devices.

The researchers in this study recently invented a wearable sensor to monitor human body temperature, made of a plastic material embedded with tiny particles of nickel with nanoscale spikes protruding from their surface. For the battery experiment, they coated the spiky nickel particles with graphene and embedded the particles in a thin film of elastic polyethylene. They then attached the film to one of the battery electrodes so that an electric current could flow through it. The researchers explain that in order to conduct electricity, the spiky particles have to physically touch one another, but during thermal expansion, polyethylene stretches. That causes the particles to spread apart, making the film non-conductive so that electricity can no longer flow through the battery.

Graphene may enable dense, energy-efficient memory chips

Researchers at Stanford University have recently performed three separate experiments that suggest graphene in computing and telecommunications could radically cut energy consumption. This work was done in search of post-silicon materials and technologies that enable storing more data per square inch and use a fraction of the energy of currently used memory chips.

All three experiments involve graphene, and test different ways to use it in new storage technologies. The scientists claim that graphene can have interesting mobile applications of these new technologies, but post-silicon memory chips may transform server farms that store and deliver quick access to enormous quantities of data stored in the cloud.

Nanomedical Diagnostics announces raise of $1.6 million in Series A funding

Nanomedical Diagnostics logoNanomedical Diagnostics, which declared the commercialization of a graphene biosensor in September 2015, announced the completion of a Series A financing round of $1.6 million. The funding round will enable the company to commercially release AGILE Research, its new label-free, quantitative, affordable research tool for small molecule and protein analysis. The company is also using the funds to lay the foundation for AGILE Lyme investigational product evaluation and market clearance.

Nanomedical Diagnostics states that it has achieved excellent progress in only 20 months, and that its current focus is finalizing AGILE Research product design. The company will be evaluating its performance with the CDC and Stanford University this fall and expects to launch the product early next year for commercial use to study proteins of interest.

Nanomedical Diagnostics declares commercialization of graphene biosensor

Nanomedical Diagnostics logoNanomedical Diagnostics, a U.S-based biotech company developing and commercializing bioelectronics for use in research and diagnostics, launched its first product, AGILE Research, a label-free, quantitative, low-cost biosensor for small molecule and protein analysis. The product is entering beta testing this fall and planned for commercial release in early 2016.

AGILE Research is based on graphene biological field effect transistor (BioFET) technology. Its vision is enabling personalized healthcare by improving diagnostic ease, speed, and cost through cutting-edge capabilities. Nanomed’s current focus is finalizing AGILE Research product design and will be evaluating its performance with the Centers for Disease Control and Prevention (CDC) and Stanford University. The CDC and Nanomedical Diagnostics are entering into a Cooperative Research and Development Agreement to evaluate direct electronic detection of Borrelia burgdorferi antigens for a new Lyme disease diagnostic system. Lyme disease research is also a focal point in the Stanford beta test.

Graphene combined with phosphorene might give a boost to sodium ion batteries

Researchers at Stanford University in California have developed a new material comprising interspersed layers of graphene and phosphorene that has been shown to be a more stable, more conductive and higher capacity anode for sodium ion batteries than previous materials. The researchers believe it could be industrially compatible, and potentially allow sodium ion batteries to become useful for large-scale energy storage.

The graphene layers provide an elastic buffer and function as an electrical highway, allowing charge to get in and out faster. The phosphorene and graphene were both produced by scalable liquid exfoliation, and the sandwich structure self-assembled when suspensions of the two components were mixed and the solvent was evaporated.