Lifeboat Foundation

Improving light-sensing devices with Q-Dots.

Harnessing the power of the sun and creating light-harvesting or light-sensing devices requires a material that both absorbs light efficiently and converts the energy to highly mobile electrical current. Finding the ideal mix of properties in a single material is a challenge, so scientists have been experimenting with ways to combine different materials to create “hybrids” with enhanced features.

In two just-published papers, scientists from the U.S. Department of Energy’s Brookhaven National Laboratory, Stony Brook University, and the University of Nebraska describe one such approach that combines the excellent light-harvesting properties of quantum dots with the tunable electrical conductivity of a layered tin disulfide semiconductor. The hybrid material exhibited enhanced light-harvesting properties through the absorption of light by the quantum dots and their energy transfer to tin disulfide, both in laboratory tests and when incorporated into electronic devices. The research paves the way for using these materials in optoelectronic applications such as energy-harvesting photovoltaics, light sensors, and light emitting diodes (LEDs).

Continue reading “Quantum dots enhance light-to-current conversion in layered metal dichalcogenide semiconductors” »

The transistor is the most fundamental building block of electronics, used to build circuits capable of amplifying electrical signals or switching them between the 0s and 1s at the heart of digital computation. Transistor fabrication is a highly complex process, however, requiring high-temperature, high-vacuum equipment.

Now, University of Pennsylvania engineers have shown a new approach for making these devices: sequentially depositing their components in the form of liquid nanocrystal “inks.”

Their new study, published in Science, opens the door for electrical components to be built into flexible or wearable applications, as the lower-temperature process is compatible with a wide array of materials and can be applied to larger areas.

Samsung is exploring the development of a contact lens that can project images directly into the users’ eye, take photographs and connect wirelessly to a smartphone, a patent application has revealed.

The South Korean copyright authority has published a 29-page application made by the consumer electronics firm two years ago, reported the technology blog Sammobile, offering a rare insight into a science fiction vision of a future technology that could be closer than we think.

The lens could overlay internet-connected services directly into the user’s line of sight, in an example of what is known as augmented reality. It could also discreetly – even covertly – take photographs. The device would be controlled by eye movements or blinking, according to the patent, and it would connect with a smartphone.

Continue reading “Samsung is developing a contact lens camera, triggered by blinking, that can also project images into the eye” »

Visa could replace credit cards by letting you buy things with a wave of your hand.

Samsung has been granted a patent for smart contact lenses with a built-in camera that activates when you blink.

Samsung’s dream of creating smart contact lenses capable of capturing images and shooting videos has just drawn closer. However, the patent reveals that Samsung has been working on the concepts and not necessarily the actual product which they trademarked as Gear Blink, which was filed in both South Korea and the U.S.

‘The analysis component of the contact lens can process the raw image data of the camera to determine processed image data indicating that the blind person is approaching intersection with a crosswalk and establish that there is a vehicle approaching the intersection’. It could very well be a smart contact lens. It’s a contact lens that consists of a small display, camera, RF antenna, and sensors to detect eye movement.

SamMobile states that the “lenses can provide a more natural way to provide augmented reality than smart glasses”. While the display projects images directly into the eye of the person wearing the contacts, an external device like a smartphone is needed for processing.

Continue reading “Samsung Files Patent For Augmented Reality Smart Contact Lenses” »

In an ever expanding universe of wearables, Samsung is doing its best to keep all bases covered. Today, the publication of a patent application shows the company is developing smart contact lenses.

The patent application, filed in South Korea, shows a contact lens equipped with a tiny display, a camera, an antenna, and several sensors that detect movement and the most basic form of input using your eyes: blinking.

Read More ON Sammobile

Continue reading “Samsung granted patent for smart contact lenses with a tiny camera” »

Researchers from the Institute for Quantum Computing at the University of Waterloo and the National Research Council of Canada (NRC) have, for the first time, converted the colour and bandwidth of ultrafast single photons using a room-temperature quantum memory in diamond.

Shifting the colour of a photon, or changing its frequency, is necessary to optimally link components in a quantum network. For example, in optical quantum communication, the best transmission through an optical fibre is near infrared, but many of the sensors that measure them work much better for visible light, which is a higher frequency. Being able to shift the colour of the photon between the fibre and the sensor enables higher performance operation, including bigger data rates.

Continue reading “Changing the color of single photons in a diamond quantum memory” »

Diodes —also known as rectifiers—allow electric current to flow in just one direction. More than 40 years ago, scientists proposed miniaturizing diodes and other electronic components down to the size of single molecules, an idea that eventually helped give birth to the field of molecular electronics, which could help push computing beyond the limits of conventional silicon devices. [See “Whatever Happened to the Molecular Computer?” IEEE Spectrum, October 2015]

Scientists at the University of Georgia and Ben-Gurion University of the Negev in Israel used DNA to fashion the new diode. The breakthroughs in genetics developed to sequence the human genome have now made it relatively easy to precisely manufacture and manipulate DNA, which makes the molecule a leading candidate for use in molecular electronics.

DNA’s double helix is made of paired strands of molecules known as bases. The new diode is only 11 base pairs long. (Typically, DNA is 0.34 nanometers long per base pair.)

Continue reading “World’s Smallest Diode Is Made of DNA” »