The device features a row of LED LIGHTS along one of its edges that once positioned within the stomach,
in order to reactivate the nerves that led to the original foot. The sensors in the prosthetic are
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.
an electric generator capable of powering a pair of LED LIGHTS, and a miniature toy"car"that seemingly moves with miraculous efficiency.
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."
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.
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,
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.
"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."
who led the new work. ut the way that it done opens a very interesting possibility.
who led the new work. ut the way that it done opens a very interesting possibility.
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
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.
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.
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."
Graphene-based film on an electronic component with high heat intensity. Credit: Johan Liu Source: http://www. mynewsdesk. com/uk/chalmers/..
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.
and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
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.
and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
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 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 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,
and LEDS because they can emit light of a specific color when a voltage is applied to them.
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."
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:
"Cells as capacitors and resistorsthe researchers printed an array of dozens of electrodes onto a thin, flexible film.
thus acting like an insulator to the cell's conductive contents and drawing the comparison to a capacitor.
Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th, 2015ultra-thin nanowires can trap electron'twisters'that disrupt superconductors February 24th, 2015discoveries Quantum computing:
Organic semiconductor Field Effect Transistors("OFET, "hereafter) using an electroless plating process. By using an electroless gold plating process with silver nanoparticles as a catalyst for an organic semiconductor,
Background to this technology OFET is a transistor that uses an organic semiconductor, which means that-among other characteristics unique to organic materials-it can be formed at low-temperatures,
and does not achieve sufficient results as a transistor. This is why in September 2014, EEJA together with Professor Takeya's research group jointly developed plating-process contact electrode formation technology for p-type organic semiconductors.
*2 Top contact-type OFET This is an organic transistor where the contact electrodes are located on the semiconductor crystal.
2015researchers enable solar cells to use more sunlight February 25th, 2015display technology/LEDS/SS Lighting/OLEDS Breakthrough 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,
Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates News and information High performance, lightweight supercapacitor electrodes of the future March 10th, 2015advantest to Exhibit at SEMICON China
Understanding why a material's behavior changes as it gets smaller March 10th, 2015announcements High performance, lightweight supercapacitor electrodes of the future March 10th, 2015advantest to Exhibit at SEMICON China in Shanghai, China, March 17-19:
2015the chameleon reorganizes its nanocrystals to change colors March 10th, 2015high performance, lightweight supercapacitor electrodes of the future March 10th,
News and information High performance, lightweight supercapacitor electrodes of the future March 10th, 2015advantest to Exhibit at SEMICON China in Shanghai, China, March 17-19:
Understanding why a material's behavior changes as it gets smaller March 10th, 2015announcements High performance, lightweight supercapacitor electrodes of the future March 10th, 2015advantest to Exhibit at SEMICON China in Shanghai, China, March 17-19:
2015the chameleon reorganizes its nanocrystals to change colors March 10th, 2015high performance, lightweight supercapacitor electrodes of the future March 10th,
#High performance, lightweight supercapacitor electrodes of the future Abstract: Researchers have developed a novel electrode to make low-cost, lightweight supercapacitors with superior performance,
a development that could mean faster charging time and longer battery life in electric vehicles and portable electronics.
As a novel energy storage device, supercapacitors have attracted substantial attention in recent years due to their ultra-high charge
which are both part of the promising future that supercapacitors could offer. Offsetting this promise is the fact that
while supercapacitors have the potential to charge faster and last longer than conventional batteries, they also need to be much larger in size
Thus, many scientists are working to develop green, lightweight, low-cost supercapacitors with high performance. Now two researchers from the S n. Bose National Centre for Basic Sciences, India, have developed a novel supercapacitor electrode based on a hybrid nanostructure made from a hybrid nickel oxide-iron oxide
exterior shell and a conductive iron-nickel core. In a paper published this week in the Journal of Applied Physics
They also demonstrate its superior performance compared to existing, non-hybrid supercapacitor electrodes. Since nickel oxide and iron oxide are environmental friendly and cheap materials that are widely available in nature,
the novel electrode promises green and low-cost supercapacitors in future.""This hybrid electrode shows the superior electrochemical performance in terms of high capacitance the ability to store electrical charge of nearly 1415 farad per gram, high current density of 2. 5 ampere per gram,
"The Promise of Supercapacitors Supercapacitors are used electronic devices to store an extremely large amount of electrical charges.
They are also known as electrochemical capacitors, and they promise high power density, high rate capability, superb cycle stability and high energy density.
Conventional capacitors have high power density but low energy density, which means they can quickly charge
Supercapacitors are a bridge between conventional capacitors and batteries, combining the advantageous properties of high power, high energy density and low internal resistance,
In supercapacitors, high capacitance, or the ability to store an electrical charge, is critical to achieve higher energy density.
one can manipulate the performance and quality of the supercapacitors, "Singh said. In Singh's experiment, the core/shell hybrid nanostructure was fabricated through a two-step method.
He explained that supercapacitors store charges through a chemical process known as a redox reaction, which involves a material giving up electrons
Larger redox reaction surfaces are essential for achieving a higher power density for supercapacitors.""Moreover, the conductive Fe-Ni core provides a highway to accelerate the transport of electrons to the current collector,
and electrochemical properties of the electrode, realizing high-performance supercapacitors,"Singh noted. How the New Electrode Performed Using techniques called cyclic voltammetry
or graphene based supercapacitors for attaching redox active material on the current collector. Without the mass of binding materials, the hybrid electrode is a good candidate to make lightweight supercapacitors."
"The remarkable electrochemical performances and material properties suggest that the iron oxide-nickel oxide hybrid core/shell nanostructure could be a reliable and promising candidate for fabricating the next generation lightweight, low-cost
and green supercapacitor electrodes for real life application, "Singh said. The researchers'next plan is to develop a whole supercapacitor device based on the hybrid electrode and test its functional performance,
a step closer to manufacturing production n
#Nanotechnology Helps Increasing Rate of Digital data Processing, Storage Iranian researchers proposed a new method based on nanotechnology to increase the rate of digital data processing and storage.
This led them to believe that Nano-85 itself was actually causing the VLPS to break apart.
Columbia Engineering researchers first to create a single-molecule diode--the ultimate in miniaturization for electronic devices--with potential for real-world applications Under the direction of Latha Venkataraman, associate professor of applied physics at Columbia Engineering,
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.
Venkataraman's group 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."
"Constructing a device where the active elements are only a single molecule has long been a tantalizing dream in nanoscience.
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.
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,
Columbia Engineering researchers first to create a single-molecule diode--the ultimate in miniaturization for electronic devices--with potential for real-world applications May 25th,
and indium gallium nitride (Ingan) LED TECHNOLOGY for producing high-brightness, emissive microdisplays for these uses, which are expected to grow dramatically in the next three to five years.
and 3d heterogeneous integration of such LED arrays on CMOS active-matrices. These innovations make it possible to produce a brightness of 1 million cd/m for monochrome devices
2015battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage Researchers synthesize magnetic nanoparticles that could offer alternative to Rare earth magnets June 1st,
Transistors, which form the basis of today's computing, are tiny devices that stop the flow of electric current (off and on,
Graphene and diamonds prove a slippery combination June 10th, 2015chip Technology Iranian Researchers Model, Design Optical Switches June 13th, 2015new boron compounds for organic light-emitting diodes:
2015battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage Binghamton engineer creates origami battery June 10th, 2015ultrafast heat conduction can manipulate nanoscale magnets June 8th, 2015diffusion and Remote Detection of Hot-Carriers in Graphene June 8th,
who led the theoretical and modeling aspects of the new imaging technique, adds:""we now have sophisticated a understanding of what the images mean".
Current printed electronics, such as transistors, light emitted diodes and solar panels, can be printed on plastic or paper substrates,
the group created a wrist-band muscle activity sensor by printing an elastic conductor on a sportswear material and combining it with an organic transistor amplifier circuit.
Moreover, the graphene film is attachable to electronic components made of silicon, which favours the films performance compared to typical graphene characteristics shown in previous, similar experiments.
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."
2015new micro-supercapacitor structure inspired by the intricate design of leaves: A team of scientists in Korea has devised a new method for making a graphene film for supercapacitors July 2nd,
2015graphene Super graphene helps boost chemotherapy treatment: Replacing silver coating on catheters with graphene increases treatment effect July 9th, 2015industrial Scale Production of Functionalised Graphitic Carbon nanomaterials July 9th, 2015bbc World Service to broadcast
/LEDS/SS Lighting/OLEDS Surfing a wake of light: Researchers observe and control light wakes for the first time July 6th,
In this research, a capacitor MOS sensor was produced that detects the leak of hydrogen at explosive level (4 vol. percent) in less than two minutes.
Capacitor sensors detect any change in the environment through changing the electrical capacity of the capacitor.
Response time has been calculated to be 84 seconds for a capacitor sensor with oxide layer thickness of 28 nanometers.
#Researchers Build a Transistor from a Molecule and A few Atoms A team of physicists from the Paul-Drude-Institut für Festkörperelektronik (PDI) and the Freie Universität Berlin (FUB), Germany, the NTT
and the U s. Naval Research Laboratory (NRL), United states, has used a scanning tunneling microscope to create a minute transistor consisting of a single molecule and a small number of atoms.
The observed transistor action is markedly different from the conventionally expected behavior and could be important for future device technologies as well as for fundamental studies of electron transport in molecular nanostructures.
Transistors have a channel region between two external contacts and an electrical gate electrode to modulate the current flow through the channel.
In atomic-scale transistors, this current is extremely sensitive to single electrons hopping via discrete energy levels.
Single-electron transport in molecular transistors has been studied previously using top-down approaches, such as lithography and break junctions.
But atomically precise control of the gate which is crucial to transistor action at the smallest size scales is not possible with these approaches.
The team used a highly stable scanning tunneling microscope (STM) to create a transistor consisting of a single organic molecule and positively charged metal atoms
and orientational dynamics of the molecule This simple and physically transparent model entirely reproduces the experimentally observed single-molecule transistor characteristics.
The perfection and reproducibility offered by these STM-generated transistors will enable the exploration of elementary processes involving current flow through single molecules at a fundamental level.
-Legislation/Regulation/Funding/Policy Researchers Build a Transistor from a Molecule and A few Atoms July 14th, 2015world first:
a compound of gallium and phosphide that also serves as the basis for specific colored leds.
#UCLA study could lead to a new class of materials for making LEDS: Researchers are first to demonstrate electroluminescence from multilayer molybdenum disulfide Over the last decade, advances in the technology of light-emitting diodes,
or LEDS, have helped to improve the performance of devices ranging from television and computer screens to flashlights.
As the uses for LEDS expand, scientists continue to look for ways to increase their efficiency
while simplifying how they are manufactured. A new study by researchers from the California Nanosystems Institute at UCLA is the first demonstration of electroluminescence from multilayer molybdenum disulfide,
or Mos2, a discovery that could lead to a new class of materials for making LEDS.
and lead to faster transistors, cheaper solar cells, new types of sensors and more efficient bioelectric sensory devices.
as well as capacitors whose energy storage capacity increases about tenfold when the fibers are stretched. Fibers and cables derived from the invention might one day be used as interconnects for super-elastic electronic circuits;
and the thin rubber layer is a dielectric, resulting in a fiber capacitor. These fiber capacitors exhibited a capacitance change of 860 percent
when the fiber was stretched 950 percent.""No presently available material-based strain sensor can operate over nearly as large a strain range,
"Besides solar energy, 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.
and industries, including laser, solar cells, production of transistors and nanomedicine. The colloid form of these particles have very interesting properties and characteristics,
#Meet the high-performance single-molecule diode: Major milestone in molecular electronics scored by Berkeley Lab and Columbia University team"Using a single symmetric molecule, an ionic solution and two gold electrodes of dramatically different exposed surface areas,
we were able to create a diode that resulted in a rectification ratio, the ratio of forward to reverse current at fixed voltage, in excess of 200,
"The asymmetry necessary for diode behavior originates with the different exposed electrode areas and the ionic solution,
Since then, development of functional single-molecule electronic devices has been a major pursuit with diodes-one of the most widely used electronic components-being at the top of the list.
A typical diode consists of a silicon p-n junction between a pair of electrodes (anode and cathode) that serves as the"valve"of an electrical circuit,
Scientists have fashioned previously single-molecule diodes either through the chemical synthesis of special asymmetric molecules that are analogous to a p-n junction;
and Zhenfei Liu to understand the diode behavior quantitatively.""In collaboration with Columbia University's Latha Venkataraman and Luis Campos and their respective research groups, Neaton and Liu fabricated a high-performing rectifier from junctions made of symmetric molecules with molecular resonance
"The Berkeley Lab-Columbia University team believes their new approach to a single-molecule diode provides a general route for tuning nonlinear nanoscale-device phenomena that could be applied to systems beyond single-molecule junctions
The paper is titled"Single-molecule diodes with high rectification ratios through environmental control.""Other co-authors are Brian Capozzi, Jianlong Xia, Olgun Adak, Emma Dell, Zhen-Fei Liu and Jeffrey Taylor r
#Sol-gel capacitor dielectric offers record-high energy storage If the material can be scaled up from laboratory samples,
Capacitors often complement batteries in these applications because they can provide large amounts of current quickly.
Perry and colleagues in Georgia Tech's Center for Organic photonics and Electronics (COPE) had been working on other capacitor materials to meet these demands
so the group decided to pursue these materials for the new capacitor applications. Using an aluminized mylar film coated with the hybrid sol-gel capacitor material,
they showed that the capacitor could be rolled and rerolled several times while maintaining high energy density, demonstrating its flexibility.
But they were still seeing high current leakage. To address that, they deposited a nanoscale self-assembled monolayer of n-octylphosphonic acid on top of the hybrid sol-gel.
"This is the first time I've seen a capacitor beat a battery on energy density, "said Perry."
"The combination of high energy density and high power density is uncommon in the capacitor world.""Researchers in Perry's lab have been making arrays of small sol-gel capacitors in the lab to gather information about the material's performance.
The devices are made on small substrates about an inch square.""What we see when we apply an electric field is that the polarization response
"This is what you want to see in a capacitor dielectric material.""The next step will be to scale up the materials to see if the attractive properties transfer to larger devices.
which can be used to print circuits and other electronic components. Graphene ink is generally low cost and mechanically flexible
Many researchers see improved interconnection of optical and electronic components as a path to more efficient computation and imaging systems.
This could lead to chips that combine optical and electronic components in a single device, with far lower losses than when such devices are made separately and then interconnected,
what happens at the surface of a double-layer capacitor. Science Impact These nanobatteries delivered their stored energy efficiently at high power (fast charge
"Self-assembled three-dimensional and compressible interdigitated thin-film supercapacitors and batteries")."This is a closeup of the soft battery,
the cornerstone of genetic programming The transistor is the central component of modern electronic systems. It acts both as a switch and as a signal amplifier.
In informatics, by combining several transistors, it is possible to construct"logic gates, "i e. systems that respond to different signal combinations according to a predetermined logic.
such as smartphones, rely on the use of transistors and logic gates. During his postdoctoral fellowship at Stanford university in the United states
Jérôme Bonnet invented a genetic transistor, the transcriptor. The insertion of one or more transcriptors into bacteria transforms them into microscopic calculators.
As a proof of concept, the authors connected the genetic transistor to a bacterial system that responds to glucose,
#Next-generation illumination using silicon quantum dot-based white-blue LED (Nanowerk News) A silicon quantum dot (QD)- based hybrid inorganic/organic light-emitting diode (LED) that exhibits white-blue electroluminescence
and their collaborators (Applied Physics Letters,"White-blue electroluminescence from a Si quantum dot hybrid light-emitting diode").
"Professor Ken-ichi Saitow, Natural science Center for Basic Research and development, Hiroshima University and Graduate student Yunzi Xin, Graduate school of Science, Hiroshima University, have fabricated an Si QD hybrid LED.
A hybrid LED is expected to be a next-generation illumination device for producing flexible lighting and display,
and this is achieved for the Si QD-based white-blue LED. The Si QD hybrid LED was developed using a simple method;
almost all processes were based solution and conducted at ambient temperature and pressure. Conductive polymer solutions and a colloidal Si QD solution were deposited on the glass substrate.
The current and optical power densities of the LED are, respectively, 280 and 350 times greater than those reported previously for such a device at the same voltage (6 V). In addition,
the active area of the LED is 4 mm2, which is 40 times larger than that of a typical commercial LED;
the thickness of the LED is 0. 5 mm. Professor Saitow stated,"QD LED has attracted significant attention as a next-generation LED.
Although several breakthroughs will be required for achieving implementation, a QD-based hybrid LED allows us to give so fruitful feature that we cannot imagine."
"Regarding quantum dots: Semiconductor QDS can produce full-color luminescence through tuning of the particle size.
QDS have attracted significant attention as potential components of next-generation solid-state light sources, including LEDS s
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