and a simple antenna with the receivers can pick up this energy. Talla demonstrated his claim by connecting an antenna to a temperature sensor
and placing it close to a Wi-fi router. The resulting voltage in the device was measured then
When the team connected a camera to their antenna the results were remarkable. Talla informed,"The battery-free camera can operate up to about five meters from the router,
which could run LED LIGHTS and even drive a miniature car! Sahin informed that his system could be hundreds times cheaper to build per unit area than solar tapping,
In the process, the electrodes are suspensions of small particles carried by a liquid and pumped through different compartments of the battery.
"We realized that a better way to make use of this flowable electrode technology was to reinvent the lithium ion manufacturing process".
"In the new method, the electrode material remained in a liquid state. Having the electrode in the form of tiny suspended particles reduces the path length for charged particles as they move through the material, a property known as tortuosity.
Less tortuous path simplifies production and proves cost effective. The new system leads to the production of battery that is more flexible and resilient.
#Flexible devices are a step closer For wearable technology a truly flexible electronic device is the goal.
Flexible electronics have been hard to manufacture because many materials with useful electronic properties tend to be rigid.
each having 96 electrodes, each of which sample one neuron, were implanted in the posterior parietal cortex. The researchers created software that processed
which in turn have access to continuous glucose monitor sensor data. All this is passed via Bluetooth to the patient smartphone,
The device features a row of LED LIGHTS along one of its edges that once positioned within the stomach,
The device has sensors at the bottom of the soles that detect pressure differences applied throughout the foot.
in order to reactivate the nerves that led to the original foot. The sensors in the prosthetic are
therefore now able to send their data, via converted signals, to the nerves and so create actual natural sensations of
sending signals to the intraoral device that has an array of electrodes on the surface.
and involve electronics, mechanical valves, and other components that create their own drawbacks. Researchers at Purdue University have come up with a new way of releasing drugs into the body in a controlled manner using tiny injectable nanowire implants.
automatically avoiding obstacles in its way thanks to built-in sensors that detect objects in its vicinity.
#Flexible Wiring to Make Garments Into Body Sensors Wearable devices for measuring various diagnostic parameters are becoming more common by the day,
when the very clothes we wear are outfitted with interconnected sensors. Clothes already being close to our bodies are a natural platform for wearable sensors,
but connecting a bunch of electronic components embedded within a pair of pants requires very flexible wiring. The Japanese team developed a new conductive ink that can be printed right onto clothes to create flexible and stretchable electric connections.
The ink is made out of a solution of silver flakes organic solvent, fluorine rubber, and fluorine surfactant, able to be stretched more than three times
The team demonstrated the technology by creating an electromyograophy (EMG) sensor using the printed wiring that can stay on the wrist
Implantable Drug Releasing Microchips Over the past few years wee covered Microchips Biotech, an MIT spin out company that developed an implantable technology to release drugs inside the body in a controlled manner.
The implantable chip has tiny reservoirs, each containing one dose of a particular medication. The tops of these reservoirs are capped by a metal membrane
The company microchips have gone already through a successful clinical trial on patients with osteoporosis, delivering teriparatide directly without having to go through regular injections.
Wireless Implantable Microchips Deliver Drugs When Needed Continuous Microchips Glucose Monitoring Shows Promiseompany homepage: Microchips Biotechource:
MIT h
#Scientists Turbo Charge Atomic Force Microscope to Watch Living Breast cancer Cells Changes in the physical properties of individual cells can point to how theye developing
the infrared light source can be used as a simple remote control to open up the drug chambers as necessary s
and so a consortium of EU researchers has been working on mimicking this ability using a camera, sensors,
#This tiny chip could end animal testing A plastic chip about the size of a thumb drive could be the end of animal testing.
is called organs-on-chips and was developed by researchers at Harvard Wyss Institute for Biologically Inspired Engineering.
Each chip is embedded with microfluidic tubes lined with human cells, through which air, blood and bacteria can be pumped,
and the chipsclear polymer allows scientists to watch the small-scale biological processes in real time. he organs-on-chips allow us to see biological mechanisms
Lung-on-a-chip is the first rganto be developed, but eventually chips that emulate hearts, intestines,
kidneys and other organs could all be linked together to form full-body networks, enabling researchers to test drugs and cosmetics without using animals.
The organs-on-chips tand to significantly reduce the need for animal testing by providing a faster
Although organs-on-chips are still years away from replacing animal trials on a large scale,
Learn more about organs-on-chips in the video below s
#Scientists create engine that is powered entirely by evaporation Water makes up over 70 percent of Earth's surface,
an electric generator capable of powering a pair of LED LIGHTS, and a miniature toy"car"that seemingly moves with miraculous efficiency.
By shrinking them down in size, researchers will be able to cram millions of these devices on a single chip.
The overhead view of a new beamsplitter for silicon photonics chips that is the size of one-fiftieth the width of a human hair.
which could be a precursor to developing the material for functional transistors. Sanchez-Yamagishi's co-authors again included Young
#One step closer to a single-molecule device Researchers have designed a new technique to create a single-molecule diode,
and, in doing so, they have developed molecular diodes that perform 50 times better than all prior designs.
The group, under the direction of Latha Venkataraman, associate professor of applied physics at Columbia Engineering, is the first to develop a single-molecule diode that may have real-world technological applications for nanoscale devices.
Their paper,"Single-Molecule Diodes with High On-Off Ratios through Environmental Control,"is published May 25 in Nature Nanotechnology."
"Our new approach created a single-molecule diode that has a high(>250) rectification and a high"on"current (0. 1 micro Amps),"says Venkataraman."
ever since its inception with Aviram and Ratner's 1974 seminal paper, represents the ultimate in functional miniaturization that can be achieved for an electronic device."
"With electronic devices becoming smaller every day, the field of molecular electronics has become ever more critical in solving the problem of further miniaturization,
The idea of creating a single-molecule diode was suggested by Arieh Aviram and Mark Ratner who theorized in 1974 that a molecule could act as a rectifier, a one-way conductor of electric current.
They have shown that single-molecules attached to metal electrodes (single-molecule junctions) can be made to act as a variety of circuit elements
including resistors, switches, transistors, and, indeed, diodes. They have learned that it is possible to see quantum mechanical effects, such as interference, manifest in the conductance properties of molecular junctions.
Since a diode acts as an electricity valve, its structure needs to be asymmetric so that electricity flowing in one direction experiences a different environment than electricity flowing in the other direction.
In order to develop a single-molecule diode, researchers have designed simply molecules that have asymmetric structures.""While such asymmetric molecules do indeed display some diode-like properties,
they are not effective, "explains Brian Capozzi, a Phd student working with Venkataraman and lead author of the paper."
"A well-designed diode should only allow current to flow in one direction-the'on'direction
-and it should allow a lot of current to flow in that direction. Asymmetric molecular designs have suffered typically from very low current flow in both'on and off'directions,
and used gold metal electrodes of different sizes to contact the molecule. Their results achieved rectification ratios as high as 250: 50 times higher than earlier designs.
including those that are made with graphene electrodes.""It's amazing to be able to design a molecular circuit,
An illustration of the molecule used by Columbia Engineering professor Latha Venkataraman to create the first single-molecule diode with a non-trivial rectification ratio overlaid on the raw current versus voltage data.
Diodes are fundamental building blocks of integrated circuits; they allow current to flow in only one direction.
#Researchers develop a semiconductor chip made almost entirely of wood Portable electronics-typically made of nonrenewable,
In an effort to alleviate the environmental burden of electronic devices, a team of University of Wisconsin-Madison researchers has collaborated with researchers in the Madison-based U s. Department of agriculture Forest Products Laboratory (FPL) to develop a surprising solution:
a semiconductor chip made almost entirely of wood. The research team, led by UW-Madison electrical
and computer engineering professor Zhenqiang"Jack"Ma, described the new device in a paper published May 26, 2015 by the journal Nature Communications("High-performance green flexible electronics based on biodegradable
or support layer, of a computer chip, with cellulose nanofibril (CNF), a flexible, biodegradable material made from wood."
"The majority of material in a chip is support. We only use less than a couple of micrometers for everything else,
"Now the chips are so safe you can put them in the forest and fungus will degrade it.
"Working with Shaoqin"Sarah"Gong, a UW-Madison professor of biomedical engineering, Cai's group addressed two key barriers to using wood-derived materials in an electronics setting:
CNF offers many benefits over current chip substrates, she says.""The advantage of CNF over other polymers is that it's a bio-based material and most other polymers are based petroleum polymers.
"The group's work also demonstrates a more environmentally friendly process that showed performance similar to existing chips.
The majority of today's wireless devices use gallium arsenide-based microwave chips due to their superior high-frequency operation and power handling capabilities.
However, gallium arsenide can be environmentally toxic, particularly in the massive quantities of discarded wireless electronics.
"I've made 1, 500 gallium arsenide transistors in a 5-by-6 millimeter chip. Typically for a microwave chip that size,
there are only eight to 40 transistors. The rest of the area is wasted just, "he says."
and make a completely functional circuit with performance comparable to existing chips.""While the biodegradability of these materials will have a positive impact on the environment,
Ma says the flexibility of the technology can lead to widespread adoption of these electronic chips."
"Mass-producing current semiconductor chips is so cheap, and it may take time for the industry to adapt to our design,
"But flexible electronics are the future, and we think we're going to be well ahead of the curve
who led the new work. ut the way that it done opens a very interesting possibility.
or fuel cell electrodes, which catalyze reactions at their surfaces. Nanofibers can also yield materials that are permeable only at very small scales, like water filters,
however, and the number of nozzles per unit area is limited by the size of the pump hydraulics. The other approach is to apply a voltage between a rotating drum covered by metal cones and a collector electrode.
where it emitted toward the electrode as a fiber. That approach is erratic however, and produces fibers of uneven lengths;
When an electrode is mounted opposite the sawteeth and a voltage applied between them, the water-ethanol mixture streams upward, dragging chains of polymer with it.
The water and ethanol quickly dissolve, leaving a tangle of polymer filaments opposite each emitter, on the electrode.
The researchers were able to pack 225 emitters, several millimeters long, on a square chip about 35 millimeters on a side.
who led the new work. ut the way that it done opens a very interesting possibility.
or fuel cell electrodes, which catalyze reactions at their surfaces. Nanofibers can also yield materials that are permeable only at very small scales, like water filters,
however, and the number of nozzles per unit area is limited by the size of the pump hydraulics. The other approach is to apply a voltage between a rotating drum covered by metal cones and a collector electrode.
where it emitted toward the electrode as a fiber. That approach is erratic however, and produces fibers of uneven lengths;
When an electrode is mounted opposite the sawteeth and a voltage applied between them, the water-ethanol mixture streams upward, dragging chains of polymer with it.
The water and ethanol quickly dissolve, leaving a tangle of polymer filaments opposite each emitter, on the electrode.
The researchers were able to pack 225 emitters, several millimeters long, on a square chip about 35 millimeters on a side.
and Korea Research Institute of Standards and Science (KRISS) reported today that they have demonstrated-for the first time-an on-chip visible light source using graphene, an atomically thin and perfectly crystalline form of carbon,
They attached small strips of graphene to metal electrodes, suspended the strips above the substrate,
"This new type of'broadband'light emitter can be integrated into chips and will pave the way towards the realization of atomically thin, flexible,
and graphene-based on-chip optical communications.""Creating light in small structures on the surface of a chip is crucial for developing fully integrated'photonic'circuits that do with light
what is now done with electric currents in semiconductor integrated circuits. Researchers have developed many approaches to do this, but have not yet been able to put the oldest and simplest artificial light sourcehe incandescent light bulbnto a chip.
This is primarily because light bulb filaments must be extremely hothousands of degrees Celsiusn order to glow in the visible range
and micro-scale metal wires cannot withstand such temperatures. In addition, heat transfer from the hot filament to its surroundings is extremely efficient at the microscale
making such structures impractical and leading to damage of the surrounding chip. By measuring the spectrum of the light emitted from the graphene,
or the metal electrodes is due to another interesting property: as it heats up, graphene becomes a much poorer conductor of heat.
For many decades, silicon has been the heart of modern electronics but as a material, it has its limits.
As our devices get smaller and smaller, the basic unit of these devices, a transistor,
the size of the silicon transistor is reaching its physical limit. As silicon devices are based on
These physical limitations have driven the race for new materials that can be used as semiconductors in lieu of silicon.
Layered Anisotropic Infrared Semiconductors with Highly Tunable Compositions and Properties. The paper appeared in Advanced Materials on June 25, 2015.
Atomic force microscope image of a black arsenic-phosphorus field-effect transistor. Image courtesy of Chongwu Zhou and Bilu Liu y
"Our understanding of optics on the macroscale has led to holograms, Google glass and LEDS, just to name a few technologies.
#Graphene-based film can be used for efficient cooling of electronics Researchers have developed a method for efficiently cooling electronics using graphene-based film.
Moreover, the graphene film is attachable to electronic components made of silicon, which favours the film's performance compared to typical graphene characteristics shown in previous, similar experiments.
Electronic systems available today accumulate a great deal of heat, mostly due to the ever-increasing demand on functionality.
professor at Chalmers University of Technology, were the first to show that graphene can have a cooling effect on silicon-based electronics.
That was the starting point for researchers conducting research on the cooling of silicon-based electronics using graphene. ut the methods that have been in place so far have presented the researchers with problems Johan Liu says. t has become evident that those methods cannot be used to rid electronic devices
which is made an electronic component of silicon, he continues. The stronger bonds result from so-called functionalisation of the graphene,
and the electronic component (see picture). Moreover, functionalisation using silane coupling doubles the thermal conductivity of the graphene.
such as highly Efficient light Emitting Diodes (LEDS), lasers and radio frequency components for cooling purposes. Graphene-based film could also pave the way for faster, smaller, more energy efficient, sustainable high power electronics."
"Image: Graphene-based film on an electronic component with high heat intensity. Credit: Johan Liu Source:
http://www. mynewsdesk. com/uk/chalmers/..
#Environmentally friendly lignin nanoparticle'greens'silver nanobullet to battle bacteria Researchers have developed an effective and environmentally benign method to combat bacteria by engineering nanoscale particles that add the antimicrobial potency of silver to a core of lignin,
In all of the experiments, the mice were about three feet away from the command antenna."
"The researchers fabricated the implant using semiconductor computer chip manufacturing techniques. It has room for up to four drugs
and has four microscale inorganic light-emitting diodes. They installed an expandable material at the bottom of the drug reservoirs to control delivery.
At its most basic level, your smart phone's battery is powering billions of transistors using electrons to flip on and off billions of times per second.
But if microchips could use photons instead of electrons to process and transmit data, computers could operate even faster.
they are too energy-hungry and unwieldy to integrate into computer chips. Duke university researchers are now one step closer to such a light source.
In a new study, a team from the Pratt School of engineering pushed semiconductor quantum dots to emit light at more than 90 billion gigahertz.
This so-called plasmonic device could one day be used in optical computing chips or for optical communication between traditional electronic microchips.
and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
like wee done here with semiconductors, we can create new designer materials with almost any optical properties we desire,
At its most basic level, your smart phone's battery is powering billions of transistors using electrons to flip on and off billions of times per second.
But if microchips could use photons instead of electrons to process and transmit data, computers could operate even faster.
they are too energy-hungry and unwieldy to integrate into computer chips. Duke university researchers are now one step closer to such a light source.
In a new study, a team from the Pratt School of engineering pushed semiconductor quantum dots to emit light at more than 90 billion gigahertz.
This so-called plasmonic device could one day be used in optical computing chips or for optical communication between traditional electronic microchips.
and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
like wee done here with semiconductors, we can create new designer materials with almost any optical properties we desire,
The researchers report in Nano Letters that by combining inorganic semiconductor nanocrystals with organic molecules, they have succeeded in pconvertingphotons in the visible and near-infrared regions of the solar spectrum. he infrared region of the solar
In their experiments, Bardeen and Tang worked with cadmium selenide and lead selenide semiconductor nanocrystals.
Bardeen said. he key to this research is the hybrid composite material combining inorganic semiconductor nanoparticles with organic compounds.
the ability to upconvert two low energy photons into one high energy photon has potential applications in biological imaging, data storage and organic light-emitting diodes.
The researchers report in Nano Letters that by combining inorganic semiconductor nanocrystals with organic molecules, they have succeeded in pconvertingphotons in the visible and near-infrared regions of the solar spectrum. he infrared region of the solar
In their experiments, Bardeen and Tang worked with cadmium selenide and lead selenide semiconductor nanocrystals.
Bardeen said. he key to this research is the hybrid composite material combining inorganic semiconductor nanoparticles with organic compounds.
the ability to upconvert two low energy photons into one high energy photon has potential applications in biological imaging, data storage and organic light-emitting diodes.
#Engineers demonstrate the world first white lasers More luminous and energy efficient than LEDS, white lasers look to be the future in lighting and Li-Fi,
The researchers have created a novel nanosheet a thin layer of semiconductor that measures roughly one-fifth of the thickness of human hair in size with a thickness that is roughly one-thousandth of the thickness of human hair with three
The technological advance puts lasers one step closer to being a mainstream light source and potential replacement or alternative to light emitting diodes (LEDS.
In typical LED-based lighting a blue LED is coated with phosphor materials to convert a portion of the blue light to green, yellow and red light.
This mixture of colored light will be perceived by humans as white light and can therefore be used for general illumination.
The researchers showed that the human eye is as comfortable with white light generated by diode lasers as with that produced by LEDS,
Ning said. single tiny piece of semiconductor material emitting laser light in all colors or in white is desired.
Semiconductors, usually a solid chemical element or compound arranged into crystals, are used widely for computer chips or for light generation in telecommunication systems.
They have interesting optical properties and are used to make lasers and LEDS because they can emit light of a specific color
when a voltage is applied to them. The most preferred light emitting material for semiconductors is indium gallium nitride
though other materials such as cadmium sulfide and cadmium selenide also are used for emitting visible colors. The main challenge, the researchers noted, lies in the way light emitting semiconductor materials are grown
and how they work to emit light of different colors. Typically a given semiconductor emits light of a single colorblue,
green or redthat is determined by a unique atomic structure and energy bandgap. The attice constantrepresents the distance between the atoms.
To produce all possible wavelengths in the visible spectral range you need several semiconductors of very different lattice constants
and energy bandgaps. ur goal is to achieve a single semiconductor piece capable of laser operation in the three fundamental lasing colors.
The piece should be small enough so that people can perceive only one overall mixed color,
Liu said. e have not been able to grow different semiconductor crystals together in high enough quality,
The most desired solution, according to Ning, would be to have a single semiconductor structure that emits all needed colors.
Later on they realized simultaneous laser operation in green and red from a single semiconductor nanosheet or nanowires.
and an important breakthrough that finally made it possible to grow a single piece of structure containing three segments of different semiconductors emitting all needed colors and the white lasers possible.
Rice physicists build superconductor analog, observe antiferromagnetic order February 23rd, 2015quantum Computing Forbidden quantum leaps possible with high-res spectroscopy March 2nd,
like multiple-die stacking with flip-chip, side-by-side heterogeneous integration, and 3d partitioning of different CMOS dies issued from CMP runs. 3d integration is highly complementary to traditional CMOS scaling,
These 3d post-process technologies require very limited redesign of existing chips, and will be used initially for specific CMOS nodes available at CMP.
and silicon photonics will affect integrated circuits. In addition to its R&d activities, IRT Nanoelec runs a technology transfer program set up to ensure that the innovations developed directly benefit businesses especially small and mid-sized businesses in all industries.
it is suited not to the field of optoelectronics where TMDCS such as molybdenum disulphide (Mos2) have a clear advantage thanks to exhibiting a finite band gap in the visible wavelength range.
Here, the plasma is generated by flowing room air past an electrode supplied with 20 W of RF power at 200 mtorr.
While typical plasma cleaners used in semiconductor fabrication operate using a"sputtering"mechanism where the sample is bombarded with ions carrying significant kinetic energy
The direct gap semiconductor show a significantly enhanced PL emission due to the efficient absorption of light in direct gap materials
crucial for application in optoelectronic devices. XEI has sold now more than 2000 Evactron systems worldwide solving contamination problems in many different environments using high vacuum including electron microscopes, FIBS and other vacuum sample chambers.
A new technique invented at Caltech to produce graphene--a material made up of an atom-thick layer of carbon--at room temperature could help pave the way for commercially feasible graphene-based solar cells and light-emitting diodes, large-panel displays, and flexible electronics."
A scaled-up version of their plasma technique could open the door for new kinds of electronics manufacturing,
Another possibility would be to grow large sheets of graphene that can be used as a transparent conducting electrode for solar cells and display panels."
New cheap and efficient electrode for splitting water March 18th, 2015graphene Graphene'gateway'discovery opens possibilities for improved energy technologies March 18th,
2015display technology/LEDS/SS Lighting/OLEDS Engineers create chameleon-like artificial'skin'that shifts color on demand March 12th, 2015breakthrough in OLED technology March 2nd,
Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th, 2015qd Vision Named Edison Award Finalist for Innovative Color IQ Quantum dot Technology
February 23rd, 2015flexible Electronics Breakthrough in OLED technology March 2nd, 2015discoveries 30 years after C60: Fullerene chemistry with silicon:
New cheap and efficient electrode for splitting water March 18th, 2015announcements 30 years after C60: Fullerene chemistry with silicon:
New cheap and efficient electrode for splitting water March 18th, 2015interviews/Book reviews/Essays/Reports/Podcasts/Journals/White papers 30 years after C60:
New cheap and efficient electrode for splitting water March 18th, 2015energy Graphene'gateway'discovery opens possibilities for improved energy technologies March 18th, 2015clean energy future:
New cheap and efficient electrode for splitting water March 18th, 2015imperfect graphene opens door to better fuel cells:
New cheap and efficient electrode for splitting water March 18th, 2015a new method for making perovskite solar cells March 16th, 2015uc research partnership explores how to best harness solar power March 2nd,
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