At the IEEE s Conference on Privacy Security and Trust in July Oshani Seneviratne an MIT graduate student in electrical engineering and computer science and Lalana Kagal a principal research scientist at CSAIL will present a paper
But now, MIT spinout FINSIX has invented an adapter that roughly one-quarter the size and one-sixth the weight of a conventional brick,
and Justin Burkhart SM 0 FINSIX has developed the world smallest laptop adapter, called the Dart.
the adapter is only slightly larger than an ordinary plug. The Dart runs on novel very high-frequency frequency (VHF) power-conversion technology, co-invented by Sagneri,
that delivers energy more often and in smaller chunks than traditional adapters, ultimately wasting less energy.
It does so by making the adapter switching frequency which transfers energy from the adapter to the battery run 1,
000 times faster. f you can increase that switching frequency, you can reduce the amount of energy that you have to store temporarily in the inductors and capacitors
Sagneri says. ee not really an adapter company; wee creating the commercially enabled technology to allow VHF power converters to become a significant portion of the market,
Under the tutelage of David Perreault, an MIT professor of electrical engineering, Sagneri helped develop a novel circuit that executes power conversion at very high frequency 30 to 300 megahertz
the company started focusing on laptop adapters. In traditional adapters, an array of switches flip to one state and take in AC voltage from a wall outlet,
where it then stored in inductors and capacitors and converted to DC voltage. The switches then flip to another state to deliver small chunks of the DC voltage to the battery,
In that analogy, the bucket is the adapter that collects the water (electricity) from a full tank (outlet) and dumps it into an empty tank (laptop battery.
with conventional adapters youe dipping a one-gallon bucket into the full tank once a minute,
and Burkhart were electrical engineering and computer science students who were excited to start a company. Around 2010, their interests merged in MIT Sloan 15.390 (New Enterprises),
Spreading pixels Oliver Cossairt, an assistant professor of electrical engineering and computer science at Northwestern University, once worked for a company that was attempting to commercialize glasses-free 3-D projectors. hat
and Marc Baldo, professor of electrical engineering. In most photovoltaic (PV) materials, a photon (a packet of sunlight) delivers energy that excites a molecule,
Think about a range around you like five feet says Gregory Wornell the Sumitomo Electric Industries Professor in Engineering in MIT s Department of Electrical engineering
an MIT graduate student in electrical engineering and computer science and lead author on the new paper, the new work is in the field of emantic parsing,
an MIT Phd student in electrical engineering and computer science (EECS) who invented the technology. With the prize money, the team including students from MIT, the California Institute of technology,
Exoelectrogens, coated on anodes, consume the wastewater remaining organic pollutants and, in the process, generate electricity.
This electricity travels through a circuit and onto cathodes coated with separate microbes that consume that electricity
or diagnostic sensors says Timothy Lu an assistant professor of electrical engineering and biological engineering. Lu is the senior author of a paper describing the living functional materials in the March 23 issue of Nature Materials.
According to Tim Lu, an assistant professor of electrical engineering and biological engineering at MIT, it boils down to the inefficient bacteria-detection assays used in the food industry.
Escape velocitythe robotic fish was built by Andrew Marchese a graduate student in MIT s Department of Electrical engineering
When we invented this new class of synthetic biomarker we used a highly specialized instrument to do the analysis says Bhatia the John and Dorothy Wilson Professor of Health Sciences and Technology and Electrical engineering and Computer science.
low-power signal processing chip that could lead to a cochlear implant that requires no external hardware.
both in MIT Department of Electrical engineering and Computer science, will also exhibit a prototype charger that plugs into an ordinary cell phone
and can recharge the signal processing chip in roughly two minutes. he idea with this design is that you could use a phone, with an adaptor,
the Joseph F. and Nancy P. Keithley Professor of Electrical engineering and corresponding author on the new paper. r you could imagine a smart pillow,
Torralba an associate professor of electrical engineering and computer science and graduate student Wilma Bainbridge. Conversely it could also be used to make faces appear less memorable
Count the photonsas Ahmed Kirmani a graduate student in MIT s Department of Electrical engineering and Computer science and lead author on the new paper explains the very idea of forming an image with only a single photon detected at each pixel location is counterintuitive.
they follow a pattern known in signal processing as Poisson noise. Simply filtering out noise according to the Poisson statistics would produce an image that would probably be intelligible to a human observer.
Researchers in the Optical and Quantum Communications Group which is led by Jeffrey Shapiro the Julius A. Stratton Professor of Electrical engineering
This can be done by applying a magnetic or electric field, or by flowing two streams of liquid along the outer edges of the channel, forcing the particles to stay in the center.
Stephen Shum a graduate student in MIT s Department of Electrical engineering and Computer science and lead author on the new paper found that a 100-variable i-vector a 100-dimension approximation of the 120000-dimension space was an adequate
says Frans Kaashoek, the Charles A. Piper Professor in the Department of Electrical engineering and Computer science (EECS).
Such a system could be used to monitor patients who are at high risk for blood clots says Sangeeta Bhatia senior author of the paper and the John and Dorothy Wilson Professor of Health Sciences and Technology and Electrical engineering and Computer science.
To improve robots ability to gauge object orientation Jared Glover a graduate student in MIT s Department of Electrical engineering
a professor of electrical engineering and computer science and director of CSAIL. e just needed a creative insight
an associate professor of electrical engineering and computer science at the University of Illinois at Urbana-Champaign who was not part of the research team. he possibilities are endless:
and other devices such as the cellphone charger that GCS later developed. e called it our universal adapter,
When atoms travel across such an electric field, they are drawn to places of minimum potential in this case, the troughs.
an MIT graduate student in electrical engineering and computer science and first author on the new paper. e need to regulate the input to extract the maximum power,
the Joseph F. and Nancy P. Keithley Professor in Electrical engineering, use an inductor, which is a wire wound into a coil.
An electric current delivered by the device removes the membrane, releasing a single dose. The device can be programmed wirelessly to release individual doses for up to 16 years to treat
but they suffer from relatively low electrical conductivity, Mirvakili says. In this new work, he and his colleagues have shown that desirable characteristics for such devices,
Power electronics is a ubiquitous technology used to convert electricity to higher or lower voltages and different currents such as in a laptop power adapter
and laptop power adapters one-third the size or even small enough to fit inside the computer itself. his is a once-in-a-lifetime opportunity to change electronics
an MIT associate professor of electrical engineering and computer science who co-invented the technology. Other cofounders and co-inventors are Anantha Chandrakasan, the Joseph F. and Nancy P. Keithley Professor in Electrical engineering, now chair of CEI technical advisory board;
alumnus Bin Lu SM 7, Phd 3, CEI vice president for device development; Ling Xia Phd2, CEI director of operations;
Major applications CEI is currently using its advanced transistors to develop laptop power adaptors that are approximately 1. 5 cubic inches in volume the smallest ever made.
a workshop hosted by the Department of Electrical engineering and Computer science, where entrepreneurial engineering students are guided through the startup process with group discussions and talks from seasoned entrepreneurs.
Moreover their method enables this value to be tuned through the application of an electric field meaning graphene circuit elements made in this way could one day be rewired dynamically without physically altering the device.
Applying an electric field pulse can change the sign of the surface charges. That's an unstable situation Rappe said in that the positively charged surface will want to accumulate negative charges and vice versa.
You could come along with a tip that produces a certain electric field and just by putting it near the oxide you could change its polarity Martin said.
They have accomplished this by bringing a graphene sheet very close to a magnetic insulator-an electrical insulator with magnetic properties.
Magnetic substances like iron tend to interfere with graphene's electrical conduction. The researchers avoided those substances
Broadly speaking organic solar cells convert light into electric current in four steps. First the cell absorbs sunlight which excites electrons in the active layer of the cell.
new tool for medical imaging,"says Prasad, also a SUNY Distinguished Professor of chemistry, physics, medicine and electrical engineering at UB."
E-jet printing refers to a technique called electrohydrodynamic jet described as a micro/nanomanufacturing process that uses an electric field to induce fluid jet printing through micro/nanoscale nozzles.
An electric field at the nozzle opening causes ions to form on the meniscus of the ink droplet.
The electric field pulls the ions forward deforming the droplet into a conical shape. Then a tiny droplet shears off and lands on the printing surface.
They wrote that these arrays as well as those constructed with multiple different QD materials directly patterned/stacked by e-jet printing can be utilized as photoluminescent and electroluminescent layers.
The difficulty with the e-jet printing method is that the electric field at one nozzle affects the fields of neighboring nozzles.
The pieces of plastic were subjected then to an increasing electric field until they crackled. Fullerenes turned out to be the type of additive that most effectively protects the insulation plastic.
The researchers will also test the method in high-voltage cables for direct current, since direct current is more efficient than alternating current for power transmission over very long distances c
#Arming nanoparticles for cancer diagnosis and treatment UCD researchers have manipulated successfully nanoparticles to target two human breast cancer cell lines as a tool in cancer diagnosis and treatment.
and Barry Rand an assistant professor of electrical engineering and the Andlinger Center for Energy and the Environment.
Batteries have called two electrodes an anode and a cathode. The anodes in most of today's lithium-ion batteries are made of graphite.
The theoretical maximum storage capacity of graphite is limited very at 372 milliamp hours per gram hindering significant advances in battery technology said Vilas Pol an associate professor of chemical engineering at Purdue University.
The researchers have performed experiments with a porous interconnected tin-oxide based anode which has nearly twice the theoretical charging capacity of graphite.
The researchers demonstrated that the experimental anode can be charged in 30 minutes and still have a capacity of 430 milliamp hours per gram (mah g 1)
The anode consists of an ordered network of interconnected tin oxide nanoparticles that would be practical for commercial manufacture
catalyzed by the gold releases electrons generates an easily measurable electric current. The gold nanotubes conduct electricity especially well due to their one-dimensional structure.
transistors for flexible electronics high-efficiency light-emitting diodes resonator-based mass sensors and integrated near-field optoelectronic tips for advanced scanning tip microscopy.
Because of that it has an electrical conductivity at least 10 times higher than the activated carbon now used to make commercial supercapacitors.
but their electrical conductivity is very low Ji said. We want fast energy storage and release that will deliver more power
Yael Hanein of Tel aviv University's School of Electrical engineering and head of TAU's Center for Nanoscience and Nanotechnology and including researchers from TAU the Hebrew University of Jerusalem and Newcastle University.
You put a hydrogen-containing gas on one side apply small electric current and collect pure hydrogen on the other side.
Coe-Sullivan, then a Phd student in electrical engineering and computer science, was working with Bulovic and students of Moungi Bawendi, the Lester Wolfe Professor in Chemistry,
When associate professor Qi Hua Fan of the electrical engineering and computer science department set out to make a less expensive supercapacitor for storing renewable energy he developed a new plasma technology that will streamline the production of display screens.
#Graphene/nanotube hybrid benefits flexible solar cells Rice university scientists have invented a novel cathode that may make cheap, flexible dye-sensitized solar cells practical.
The Rice lab of materials scientist Jun Lou created the new cathode, one of the two electrodes in batteries,
a return line completes the circuit to the cathode that combines with an iodine-based electrolyte to refresh the dye.
The new cathode's charge-transfer resistance, which determines how well electrons cross from the electrode to the electrolyte,
was found to be 20 times smaller than for platinum-based cathodes, Lou said. The key appears to be the hybrid's huge surface area,
When combined with an iodide salt-based electrolyte and an anode of flexible indium tin oxide,
Based on recent work on flexible graphene-based anode materials by the Lou and Tour labs and synthesized high-performance dyes by other researchers,
because tunneling is a local effect sensitive only to the topmost layer of materials this phenomenon as observed topographically results from the tunneling of x-ray excited photoelectrons from states between the Fermi level and the work function.
and the nanowires are grown by applying electric current through electrodeposition. Nath grows the nanowires in a parallel pattern
Adrian Bachtold, together with Marc Dykman (Michigan University), report on an experiment in which a carbon nanotube mechanical resonator exhibits quality factors of up to 5 million,
This allows them to determine how precise the resonator can be at measuring or sensing objects.
Scientists use mechanical resonators to study all sorts of physical phenomena. Nowadays, carbon nanotube mechanical resonators are in demand because of their extremely small size and their outstanding capability of sensing objects at the nanoscale.
Though they are very good mass and force sensors, their quality factors have been somewhat modest.
What is a Mechanical Resonator? A mechanical resonator is a system that vibrates at very precise frequencies.
Like a guitar string or a tightrope, a carbon nanotube resonator consists of a tiny, vibrating bridge-like (string) structure with typical dimensions of 1#m in length and 1nm in diameter.
If the quality factor of the resonator is high, the string will vibrate at a very precise frequency,
thus enabling these systems to become appealing mass and force sensors, and exciting quantum systems.
For many years, researchers observed that quality factors decreased with the volume of the resonator, that is the smaller the resonator the lower the quality factor,
The giant quality factors that ICFO researchers have measured have not been observed before in nanotube resonators mainly
since"nanotube resonators are enormously sensitive to surrounding electrical charges that fluctuate constantly. This stormy environment strongly affects our ability to capture the intrinsic behavior of nanotube resonators.
For this reason, we had to take a very large number of snapshots of the nanotube's mechanical behavior.
For instance, nanotube resonators might be used to detect individual nuclear spins, which would be an important step towards magnetic resonance imaging (MRI) with a spatial resolution at the atomic level.
and high electrical conductivity and are used in products from baseball bats and other sports equipment to lithium-ion batteries and touchscreen computer displays.
As the battery cycles lithium ions shuttle back and forth between cathode and anode and leave behind detectable tracks of nanoscale damage.
Crucially the high heat of vehicle environments can intensify these telltale degradation tracks and even cause complete battery failure.
an international group of scientists announced the most significant breakthrough in a decade toward developing DNA-based electrical circuits.
to date, no one has actually been able to make complex electrical circuits using molecules. The only known molecules that can be designed pre to self-assemble into complex miniature circuits,
signaling a significant breakthrough towards the development of DNA-based electrical circuits. The research, which could reignite interest in the use of DNA-based wires
(or voltage) produces a strong electric field that drives molecular rearrangements in the electrolyte next to the electrode.
The abundance and environmentally friendly nature of the element sulfur as cathode material are factors in the huge potential of lithium-sulfur batteries.
"Due to excellent electrical conductivity, mechanical strength and chemical stability, nanocarbon materials have played an essential role in the area of advanced energy storage,
However, most contributions concerning carbon/sulfur composite cathodes possess a relatively low areal loading of sulfur of less than 2. 0 mg cm-2,
which prevented the full demonstration of the outstanding performance of C/S composite cathodes.""The areal capacity of commercially used lithium-ion batteries is about 4 mah cm-2,
and therefore, the areal loading of sulfur in the cathode of lithium-sulfur batteries needs to be improved greatly,
"The areal capacity can be increased further to 15.1 mah cm-2 by stacking three CNT-S paper electrodes, with an areal sulfur loading of 17.3 mg cm-2 as the cathode in a Li
and possesses exciting properties such as high mechanical stability and remarkable electrical conductivity. It has been touted as the next generation material that can conceivably revolutionize existing technology
Materials scientist Regina Ragan and electrical engineer Filippo Capolino have created a nano-optical sensor that can detect trace levels of infection in a small sample of breath.
or cathode and scratched the surface with sandpaper to form a light panel capable of producing a large stable and homogenous emission current with low energy consumption.
The new devices have luminescence systems that function more like cathode ray tubes with carbon nanotubes acting as cathodes
and a phosphor screen in a vacuum cavity acting as the anode. Under a strong electric field the cathode emits tight high-speed beams of electrons through its sharp nanotube tips a phenomenon called field emission.
The electrons then fly through the vacuum in the cavity and hit the phosphor screen into glowing.
We have found that a cathode with highly crystalline single-walled carbon nanotubes and an anode with the improved phosphor screen in our diode structure obtained no flicker field emission current and good brightness homogeneity Shimoi said.
Field emission electron sources catch scientists'attention due to its ability to provide intense electron beams that are about a thousand times denser than conventional thermionic cathode (like filaments in an incandescent light bulb.
That means field emission sources require much less power to operate and produce a much more directional and easily controllable stream of electrons.
The resistance of cathode electrode with highly crystalline single-walled carbon nanotube is very low. Thus the new flat-panel device has compared smaller energy loss with other current lighting devices
which can be used to make energy-efficient cathodes that with low power consumption. Many researchers have attempted to construct light sources with carbon nanotubes as field emitter Shimoi said.
of which shows this super accuracy adds Associate professor Andrea Morello from UNSW's School of Electrical engineering and Telecommunications.
This kind of coupling is a direct consequence of the glass fibre geometry and the laws of electrodynamics.
The motor prototype is built by the LUT Electrical engineering group as a start towards lightweight efficient electric drives.
Superconductivity appears not to develop to such a level that it could in general be applied to electrical machines.
Currently plasmonic absorbers used in biosensors have a resonant bandwidth of 50 nanometers said Koray Aydin assistant professor of electrical engineering and computer science at Northwestern University's Mccormick School of engineering and Applied science.
3-D nanomagnetic logic Electrical engineers at the Technical University Munich (TUM) have demonstrated a new kind of building block for digital integrated circuits.
#Nanotube cathode beats large pricey laser Scientists are a step closer to building an intense electron beam source without a laser.
Using the High-Brightness Electron Source Lab at DOE's Fermi National Accelerator Laboratory a team led by scientist Luigi Faillace of Radiabeam Technologies is testing a carbon nanotube cathode about the size of a nickel
Tests with the nanotube cathode have produced beam currents a thousand to a million times greater than the one generated with a large pricey laser system.
While carbon nanotube cathodes have been studied extensively in academia Fermilab is the first facility to test the technology within a full-scale setting.
Fermilab was sought out to test the experimental cathode because of its capability and expertise for handling intense electron beams one of relatively few labs that can support this project.
The new cathode appears at first glance like a smooth black button but at the nanoscale it resembles in Piot's words millions of lightning rods.
When a strong electric field is applied it pulls streams of electrons off the surface of the cathode creating the electron beam.
The exceptional strength of carbon nanotubes prevents the cathode from being destroyed. Traditionally accelerator scientists use lasers to strike cathodes
in order to eject electrons through photoemission. The electric and magnetic fields of the particle accelerator then organize the electrons into a beam.
The tested nanotube cathode requires no laser: it only needs the electric field already generated by an accelerator to siphon the electrons off a process dubbed field emission n
#Nanoengineering enhances charge transport promises more efficient future solar cells Solar cells based on semiconducting composite plastics and carbon nanotubes is one of the most promising novel technology for producing inexpensive printed solar cells.
and the nanotubes have outstanding electrical conductivity, and they can effectively separate and transport electrical charges generated from solar energy.
The material is a two-dimensional metallic dielectric photonic crystal and has the additional benefits of absorbing sunlight from a wide range of angles
which then causes the material to glow emitting light that can in turn be converted to an electric current.
No one had tried putting a dielectric material inside so we tried that and saw some interesting properties.
-and angle-resolved photoelectron spectroscopy technique to identify such valleys in the band structure of an ultrathin layer of molybdenum disulfide just a few atoms thick.
Semiconducting materials exhibit mid-range electrical conductivity. When semiconducting materials are subjected to an input of a specific energy bound electrons can be moved to higher energy conducting states.
and as a replacement for carbon in the cathodes of lithium batteries. Another potential application comes from the fact that silicon crystals at dimensions of 5 nanometers
and reliability of Gan micro-rod LEDS fabricated on graphene to the test they found that the resulting flexible LEDS showed intense electroluminescence (EL)
and were concentrating on the speed of electrical conduction through the patch. We thought nanotubes could be integrated easily.
Biocompatible Carbon nanotube#Chitosan Cardiac Scaffold Matching the Electrical conductivity of the Heart. Seokwon Pok Flavia Vitale Shannon L. Eichmann Omar M. Benavides Matteo Pasquali and Jeffrey G Jacot ACS Nano Just Accepted Manuscript DOI:
#Engineers show light can play seesaw at the nanoscale University of Minnesota electrical engineering researchers have developed a unique nanoscale device that for the first time demonstrates mechanical transportation of light.
In their study the researchers used x-ray photoelectron spectroscopy and Raman spectroscopy to confirm that the bioreceptor molecules had attached to the graphene biosensor once fabricated
or out of the samarium nickelate when an electric field is applied, regardless of temperature, so the device can be operated in the same conditions as conventional electronics.
"Just by applying an electric field, you're dynamically controlling how light interacts with this material."
and systems that will transform signal processing and computation. Ramanathan compares the current state of quantum materials research to the 1950s,
In these highly efficient devices individual molecules would take on the roles currently played by comparatively-bulky wires resistors and transistors.
and rate performances of Li-S batteries for practical application with the N-ACNT/G hybrids as cathode materials. said Prof.
The key according to UCSB professor of electrical and computer engineering Kaustav Banerjee who led this research is Mos2's band gap the characteristic of a material that determines its electrical conductivity.
Graphene has been used among other things to design FETSEVICES that regulate the flow of electrons through a channel via a vertical electric field directed into the channel by a terminal called a gate.
While one-dimensional materials such as carbon nanotubes and nanowires also allow excellent electrostatics and at the same time possess band gap they are not suitable for low-cost mass production due to their process complexities she said.
or small proteins still maintaining good electrostatics which can lead to high sensitivity even for detection of single quanta of these biomolecular species she added.
great electrostatics due to their ultra-thin body scalability (due to large band gap) as well as patternability due to their planar nature that is essential for high-volume manufacturing said Banerjee.
This color filtering is done commonly using off-chip dielectric or dye color filters which degrade under exposure to sunlight
#Scientists fabricate defect-free graphene set record reversible capacity for Co3o4 anode in Li-ion batteries Graphene has already been demonstrated to be useful in Li-ion batteries,
Wrapping a large sheet of negatively charged df-G around a positively charged Co3o4 creates a very promising anode for high-performance Li-ion batteries.
The researchers demonstrated that wrapping a large-sized negatively charged sheet of df-G around a positively charged piece of Co3o4 creates an anode with several impressive characteristics.
with its perfect crystallinity, improves the anode performance because when a single graphene sheet is wrapped around a bundle of Co3o4 particles,
and then electrically detaching from the anode, which would otherwise occur. Because of this protective effect, the anode's capacity is preserved even after 200 cycles,
whereas anodes with an imperfect graphene layer rapidly decrease with cycling. The large size of the graphene plays a key role in the performance
because a larger size provides a higher cycling stability of the nanosized anode materials by improving their mechanical integrity.
With these advantages, the researchers expect the df-G to bring significant advances of composite electrodes for a variety of electrochemical system,
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