Posts Tagged ‘ Electronic ’

Transparent Stretchable Foldable Electronic Display on the Horizon

OLED_Technology_Smartphone

Img Credit: Wikipedia

At present, organic light-emitting device (OLED) technology is being used in display screens of many of the smartphones and some of the televisions; actually OLED technology is not really a new idea. But now the researchers from UCLA’s Henry Samueli School of Engineering and Applied Science have developed a smart OLED version which is stretchable, foldable, and transparent.

Researchers have developed a transparent, elastic organic light-emitting device (OLED) that can be repeatedly stretched, folded and twisted at room temperature while still remaining turned on and retaining its original shape which could help revolutionize the electronic display technology. To make this OLED, the researchers worked in layers. The top layer is a protective cover. Next is a transparent electrode, and underneath that is a polymer that lights up when an electrical current hits it. Underneath that polymer is another transparent electrode, followed by another cover. The electrodes are made of a network of silver nanowires inlaid into a stretchy rubbery polymer which allows the device to be used at room temperatures. The network of wires makes a crosshatch pattern, and each point where the wires cross lights up, making a pixel.

The researchers stretched and restretched the OLED 1,000 times, extending it 30 percent beyond its original shape and size, and it still continued to work at a high efficiency. In another test to determine the material’s maximum stretch, the researchers found it could be stretched to more than twice its original size while still functioning. In addition, it can be folded 180 degrees and can be twisted in multiple directions. But there are still some technical challenges like the material is sensitive to air, so there has to be a way to seal it in the same way current glass displays shield their sensitive components. Researchers around the world are racing the clock tackling this obstacle.

For sure, with advancements in this technology it could lead to the new horizons of electronic display and much more. Imagine an electronic display stretching like rubber, or as transparent as the crystal clear water, or a curtain that illuminates a room, or a smartphone screen that have adjustable sizes, or displays which can be flex with a person’s body and all of these being made from the same material.

The research appears in the current issue of the journal Nature Photonics.

Self-Healing Materials

The concept of self-healing material or technology  has been under research since a decade, with a view to reducing the risks and costs of cracking and damage in a wide range of materials and increasing the durability of materials to much greater extend.

This post briefly gives an idea about self-healing technology, so let’s start with a question, what are these self-healing materials?

Self-healing materials are a class of smart materials that have the structurally incorporated ability to repair damage caused by mechanical usage over time. The inspiration comes from biological systems, which have the ability to heal after being wounded. For a material to be defined as self-healing, it is necessary that the healing process occurs without human intervention.

Something more about it!

Self-healing method is possible with the help of Nanotechnology. Carbon nano-tubes can be used to sense and heal a crack. It is possible that Carbon nano-tubes can sense a crack within the structure, and then it can be used to supply healing agent to all the defected areas in the material, and this healing agent can be released whenever and wherever a crack or scratch appears. Carbon nano-tubes can be used for thermal transports to heat up the material at microscopic level so that the cracks or scratches can be removed from the material. In this way, it can heal a material.

Each Carbon nano-tube is less than 100 millionths of a meter in diameter, and this is what we call Nanotechnology. The first products to use these healing technique will most likely be paints; for example, a car can heals its own scratches on its painted surface, a scratch on any painted surface can be healed itself, and with more research and development it might be possible that this technique can work on many other things like on electronic gadgets or devices.  It will be possible that in coming year there will be cell phone which can heals scratch on their touchscreens themselves, and much more. I think, it’s a promising future technology.